2、尚硅谷_SSM高级整合_创建Maven项目.avi

第一步我们新建立一个web工程

这里首先要勾选上enable的第一个复选框

这里要勾选上add maven support

我们在pom.xml中添加sevlet的依赖

创建java web项目之后，首先是需要添加servlet、jsp依赖到pom.xml：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.aitigugu</groupId>
  <artifactId>SSM</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>SSM</name>
  <description/>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <version>3.0</version>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
</dependency>
<dependency> 
   <groupId>javax.servlet.jsp</groupId> 
   <artifactId>jsp-api</artifactId> 
   <version>2.1</version> 
   <scope>provided</scope>
</dependency>
  
  </dependencies>
</project>
这样整个工程就建立好了，index.jsp页面就不好出现红色的叉了

3、尚硅谷_SSM高级整合_设置maven.avi

这里我们要配置项目需要的jar，需要maven去下载，我们可以在maven中设置阿里云的镜像

从上面为你可以知道我们使用的maven的目录，找到上面对应的setting.xml文件

添加下面的内容

 <mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
     |
    <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>
      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
    </mirror>
     -->
     
    <mirror> 
    <id>alimaven</id> 
    <name>aliyun maven</name> 
    <url>http://maven.aliyun.com/nexus/content/groups/public/</url> 
    <mirrorOf>central</mirrorOf> 
  </mirror> 
  </mirrors>

接下面我们在项目的pom.xml中引入项目需要的jar包，到maven所在的网站去搜索就可以了

我们选择4.3.7版本

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.aitigugu</groupId>
  <artifactId>SSM</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>SSM</name>
  <description/>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <version>3.0</version>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
</dependency>
<dependency> 
   <groupId>javax.servlet.jsp</groupId> 
   <artifactId>jsp-api</artifactId> 
   <version>2.1</version> 
   <scope>provided</scope>
</dependency>
  <!-- 配置springmvc -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 <!-- 配置springjdbc -->
 <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 <!-- 配置spring aop -->
 <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 
 <!-- 配置mybatis -->
 <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.2</version>
</dependency>
<!-- 配置mybatis和spring整合的jar包 -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.0</version>
</dependency>

<!-- 配置c3p0 -->
<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
<dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1</version>
</dependency>

<!-- 配置mysql驱动 -->
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.41</version>
</dependency>

<!-- 配置jstl -->
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl -->
<dependency>
    <groupId>javax.servlet.jsp.jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

<!-- 配置junit -->
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

 
  </dependencies>
</project>

5、尚硅谷_SSM高级整合_引入Bootstrap.avi

接下来我们在项目中引入bootstrap前端框架

接下来我们把bootstrap引入到我们的工程中，我们在项目中新建立一个static的静态文件夹，用来存储静态的资源文件

我们在index.jsp页面中使用boot

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
      <!-- 使用bootstar还需要使用jquery库 -->
    <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
    <script src="static/js/jquery-1.12.4.min.js"></script>
   <!-- Bootstrap -->
    <link href="static/bootstrap-3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
     <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
    <script src=static/bootstrap-3.3.7/dist/js/bootstrap.min.js"></script>

  </head>
  
  <body>
    This is my JSP page. <br>
  </body>
</html>
6、尚硅谷_SSM高级整合_SSM整合配置_配置web.xml.avi

 我们来看下web.xml的基本配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>SSM</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- 配置spring 的启动文件 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  
  <!-- 配置springmvc的配置文件 -->
    <servlet>  
        <servlet-name>DispatcherServlet</servlet-name><!--在DispatcherServlet的初始化过程中，框架会在web应用的 WEB-INF文件夹下寻找名为[servlet-name]-servlet.xml 的配置文件，生成文件中定义的bean。-->  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <!--指明了配置文件的文件名，不使用默认配置文件名，而使用dispatcher-servlet.xml配置文件。-->  
        <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>classpath:dispatcher-servlet.xml</param-value>  
        </init-param>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <servlet-mapping> 
        <servlet-name>DispatcherServlet</servlet-name>  
        <url-pattern>/</url-pattern>
    </servlet-mapping>  
    
    <!-- 配置中文乱码问题 ，字符编码必须放在所以过滤器之前-->
     <filter>  
        <filter-name>characterEncodingFilter</filter-name>  
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
        <init-param>  
            <param-name>encoding</param-name>  
            <param-value>UTF-8</param-value>  
        </init-param>  
        <init-param>  
            <param-name>forceEncoding</param-name>  
            <param-value>true</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>characterEncodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
    
    <!-- 为了支持restful风格，需要配置下面的filter -->
    <filter>    
              <filter-name>HiddenHttpMethodFilter</filter-name>    
              <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    
      </filter>    
      <filter-mapping>    
              <filter-name>HiddenHttpMethodFilter</filter-name>    
              <servlet-name>spring</servlet-name>    
      </filter-mapping> 
</web-app>

对应filter有先后的拦截顺序，对应字符串编码的filer一定要放在所有的过滤器之前


 7、尚硅谷_SSM高级整合_SSM整合配置_配置SpringMVC.avi
我们新建立下面的几个包

 接下来我们配置springmvc的配置文件
dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
                        http://www.springframework.org/schema/task
                        http://www.springframework.org/schema/task/spring-task-3.1.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">

    <!-- 配置扫描控制器 ，springmvc值扫描controler，其他的对象都让spring去管理,这里use-default-filters="false"要设置成false-->
    <context:component-scan base-package="com.atguigu" use-default-filters="false">
      <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器 -->
    <!-- 配置视图解析器 -->  
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
    <!-- 配置视图解析器的前缀和后缀 -->  
    <property name="prefix" value="/WEB-INF/views/"></property>  
    <property name="suffix" value=".jsp"></property>  
</bean>  
 
 <!-- 配置允许访问静态资源文件 -->
 <mvc:default-servlet-handler/>
 <!-- 支持springmvc的更加高级的东西 -->
 <mvc:annotation-driven></mvc:annotation-driven>
 
 

</beans>

 8、尚硅谷_SSM高级整合_SSM整合配置_配置Spring.avi
配置spring的时候，需要配置数据源
我们新建立一个dbconfig.properties

 dbconfig.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm_crud
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123456

在srping的配置文件中我们需要整合mybatis，我们创建一个mybatis的全局的配置文件

我们使用mabatis有很多的bean对应的xml文件，我们新建立一个mapper文件夹存储这些bean文件

通过自动扫描简化mapper的配置

前面的章节可以看到，我们的dao需要一个一个的配置在配置文件中，如果有很多个dao的话配置文件就会非常大，这样管理起来就会比较痛苦。幸好mybatis团队也意识到了这点，他们利用spring提供的自动扫描功能封装了一个自动扫描dao的工具类，这样我们就可以使用这个功能简化配置：

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
    
    <!-- 配置c3p0数据源 -->
    <!-- 引入外部的数据库配置文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <!-- 配置spring的IOC，但是不能扫描springmvc的controller，spring 扫描service dao utils的bean
    controller由springmvc去扫描 -->
    
    <context:component-scan base-package="com.aiguigu" use-default-filters="false">
     <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    <!--================== 配置和MyBatis的整合=============== -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定mybatis全局配置文件的位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 数据源就是上面配置的c3p0数据源 -->
        <property name="dataSource" ref="pooledDataSource"></property>
        <!-- 指定mybatis，mapper文件的位置 ，扫描mapper文件夹下面的所有配置文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    </bean>
    
    <!-- 通过自动扫描简化mapper的配置

前面的章节可以看到，我们的dao需要一个一个的配置在配置文件中，
如果有很多个dao的话配置文件就会非常大，这样管理起来就会比较痛苦。
幸好mybatis团队也意识到了这点，
他们利用spring提供的自动扫描功能封装了一个自动扫描dao的工具类，这样我们就可以使用这个功能简化配置： -->

    <!-- 配置扫描器，将mybatis接口的实现加入到ioc容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--扫描所有dao接口的实现，加入到ioc容器中 -->
        <property name="basePackage" value="com.atguigu.crud.dao"></property>
    </bean>
    
  <!-- 配置事务管理器 -->
  <!-- ===============事务控制的配置 ================-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--控制住数据源  -->
        <property name="dataSource" ref="pooledDataSource"></property>
    </bean>
    
    <!--开启基于注解的事务，使用xml配置形式的事务（必要主要的都是使用配置式com.atguigu.crud.service..*(..)包及其子包
    如果是com.atguigu.crud.service*(..)就没有子包
    ）  -->
    <aop:config>
        <!-- 切入点表达式 -->
        <aop:pointcut expression="execution(* )" id="txPoint"/>
        <!-- 配置事务增强 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
    </aop:config>
    
    <!--配置事务增强，事务如何切入  -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 所有方法都是事务方法 -->
            <tx:method name="*"/>
            <!--以get开始的所有方法，可以进行优化  -->
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>
        
    
</beans>

通过自动扫描简化mapper的配置

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

<property name="basePackage" value="com.atguigu.crud.dao"></property>
</bean>

9、尚硅谷_SSM高级整合_基础模块_MyBatis逆向工程.avi

接下来我们来配置mybatis的配置文件

首先我们先把数据库表创建出来

CREATE TABLE `tbl_dept` (
  `dept_id` int(1) NOT NULL AUTO_INCREMENT,
  `dept_name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`dept_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `tbl_emp` (
  `emp_id` int(11) NOT NULL AUTO_INCREMENT,
  `emp_name` varchar(255) DEFAULT NULL,
  `gender` varchar(1) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `d_id` int(11) NOT NULL,
  PRIMARY KEY (`emp_id`),
  KEY `d-Id` (`d_id`),
  CONSTRAINT `d-Id` FOREIGN KEY (`d_id`) REFERENCES `tbl_dept` (`dept_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

表创建成功之后，接下来使用mybatis的逆向工程来生成数据库表对应的bean文件和map文件

第一步：需要在maven中配置mybatis 逆向工程的jar包

<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>

2、第二步在当前工程下面创建一个mbg,xml文件

mbj.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
  PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
  "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!-- 配置数据库连接 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
            password="123456">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- 指定javaBean生成的位置 -->
        <javaModelGenerator targetPackage="com.atguigu.crud.bean"
            targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!--指定sql映射文件生成的位置 \src\main\resources\mapper-->
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!-- 指定dao接口生成的位置，mapper接口 生成的位置 \src\main\java\com.atguigu.crud.dao-->
        <javaClientGenerator type="XMLMAPPER"
            targetPackage="com.atguigu.crud.dao" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>


        <!-- table指定每个表的生成策略 -->
        <table tableName="tbl_emp" domainObjectName="Employee"></table>
        <table tableName="tbl_dept" domainObjectName="Department"></table>
    </context>
</generatorConfiguration>

接下面我们要运行生成生成对应的配置文件

我们在test包下建立一个文件生成对应的逆向文件

10、尚硅谷_SSM高级整合_基础模块_修改Mapper文件.avi

上面通过逆向工程生成的代码不一定满足我们的条件

我们需要进行修改

我们在EmployeeMapper增加下面的两个接口

package com.atguigu.crud.dao;

import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.bean.EmployeeExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;

public interface EmployeeMapper {
    long countByExample(EmployeeExample example);

    int deleteByExample(EmployeeExample example);

    int deleteByPrimaryKey(Integer empId);

    int insert(Employee record);

    int insertSelective(Employee record);

    List<Employee> selectByExample(EmployeeExample example);

    Employee selectByPrimaryKey(Integer empId);
    
    List<Employee> selectByExampleWithDept(EmployeeExample example);

    Employee selectByPrimaryKeyWithDept(Integer empId);

    int updateByExampleSelective(@Param("record") Employee record, @Param("example") EmployeeExample example);

    int updateByExample(@Param("record") Employee record, @Param("example") EmployeeExample example);

    int updateByPrimaryKeySelective(Employee record);

    int updateByPrimaryKey(Employee record);

}
然后修改对应的bean文件
Employee

package com.atguigu.crud.bean;

public class Employee {
    private Integer empId;

    private String empName;

    private String gender;

    private String email;

    private Integer dId;
    
    //希望查询员工的同时部门信息也是查询好的
    private Department department;
    
    

    public Department getDepartment() {
        return department;
    }

    public void setDepartment(Department department) {
        this.department = department;
    }

    public Integer getEmpId() {
        return empId;
    }

    public void setEmpId(Integer empId) {
        this.empId = empId;
    }

    public String getEmpName() {
        return empName;
    }

    public void setEmpName(String empName) {
        this.empName = empName == null ? null : empName.trim();
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender == null ? null : gender.trim();
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email == null ? null : email.trim();
    }

    public Integer getdId() {
        return dId;
    }

    public void setdId(Integer dId) {
        this.dId = dId;
    }
}

 接下来修改EmployeeMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.crud.dao.EmployeeMapper">
  <resultMap id="BaseResultMap" type="com.atguigu.crud.bean.Employee">
    <id column="emp_id" jdbcType="INTEGER" property="empId" />
    <result column="emp_name" jdbcType="VARCHAR" property="empName" />
    <result column="gender" jdbcType="CHAR" property="gender" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="d_id" jdbcType="INTEGER" property="dId" />
  </resultMap>
  <resultMap type="com.atguigu.crud.bean.Employee" id="WithDeptResultMap">
      <id column="emp_id" jdbcType="INTEGER" property="empId" />
    <result column="emp_name" jdbcType="VARCHAR" property="empName" />
    <result column="gender" jdbcType="CHAR" property="gender" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="d_id" jdbcType="INTEGER" property="dId" />
    <!-- 指定联合查询出的部门字段的封装 -->
    <association property="department" javaType="com.atguigu.crud.bean.Department">
        <id column="dept_id" property="deptId"/>
        <result column="dept_name" property="deptName"/>
    </association>
  </resultMap>
  <sql id="Example_Where_Clause">
    <where>
      <foreach collection="oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Update_By_Example_Where_Clause">
    <where>
      <foreach collection="example.oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Base_Column_List">
    emp_id, emp_name, gender, email, d_id
  </sql>
  <sql id="WithDept_Column_List">
      e.emp_id, e.emp_name, e.gender, e.email, e.d_id,d.dept_id,d.dept_name
  </sql>
  <!--   List<Employee> selectByExampleWithDept(EmployeeExample example);
    Employee selectByPrimaryKeyWithDept(Integer empId); 
    -->
   <!-- 查询员工同时带部门信息 -->
  <select id="selectByExampleWithDept" resultMap="WithDeptResultMap">
       select
        <if test="distinct">
          distinct
        </if>
        <include refid="WithDept_Column_List" />
        FROM tbl_emp e
        left join tbl_dept d on e.`d_id`=d.`dept_id`
        <if test="_parameter != null">
          <include refid="Example_Where_Clause" />
        </if>
        <if test="orderByClause != null">
          order by ${orderByClause}
        </if>
  </select>
  <select id="selectByPrimaryKeyWithDept" resultMap="WithDeptResultMap">
       select 
    <include refid="WithDept_Column_List" />
    FROM tbl_emp e
    left join tbl_dept d on e.`d_id`=d.`dept_id`
    where emp_id = #{empId,jdbcType=INTEGER}
  </select>
  
  <!-- 查询员工不带部门信息的 -->
  <select id="selectByExample" parameterType="com.atguigu.crud.bean.EmployeeExample" resultMap="BaseResultMap">
    select
    <if test="distinct">
      distinct
    </if>
    <include refid="Base_Column_List" />
    from tbl_emp
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
    <if test="orderByClause != null">
      order by ${orderByClause}
    </if>
  </select>
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from tbl_emp
    where emp_id = #{empId,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    delete from tbl_emp
    where emp_id = #{empId,jdbcType=INTEGER}
  </delete>
  <delete id="deleteByExample" parameterType="com.atguigu.crud.bean.EmployeeExample">
    delete from tbl_emp
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </delete>
  <insert id="insert" parameterType="com.atguigu.crud.bean.Employee">
    insert into tbl_emp (emp_id, emp_name, gender, 
      email, d_id)
    values (#{empId,jdbcType=INTEGER}, #{empName,jdbcType=VARCHAR}, #{gender,jdbcType=CHAR}, 
      #{email,jdbcType=VARCHAR}, #{dId,jdbcType=INTEGER})
  </insert>
  <insert id="insertSelective" parameterType="com.atguigu.crud.bean.Employee">
    insert into tbl_emp
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="empId != null">
        emp_id,
      </if>
      <if test="empName != null">
        emp_name,
      </if>
      <if test="gender != null">
        gender,
      </if>
      <if test="email != null">
        email,
      </if>
      <if test="dId != null">
        d_id,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="empId != null">
        #{empId,jdbcType=INTEGER},
      </if>
      <if test="empName != null">
        #{empName,jdbcType=VARCHAR},
      </if>
      <if test="gender != null">
        #{gender,jdbcType=CHAR},
      </if>
      <if test="email != null">
        #{email,jdbcType=VARCHAR},
      </if>
      <if test="dId != null">
        #{dId,jdbcType=INTEGER},
      </if>
    </trim>
  </insert>
  <select id="countByExample" parameterType="com.atguigu.crud.bean.EmployeeExample" resultType="java.lang.Long">
    select count(*) from tbl_emp
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </select>
  <update id="updateByExampleSelective" parameterType="map">
    update tbl_emp
    <set>
      <if test="record.empId != null">
        emp_id = #{record.empId,jdbcType=INTEGER},
      </if>
      <if test="record.empName != null">
        emp_name = #{record.empName,jdbcType=VARCHAR},
      </if>
      <if test="record.gender != null">
        gender = #{record.gender,jdbcType=CHAR},
      </if>
      <if test="record.email != null">
        email = #{record.email,jdbcType=VARCHAR},
      </if>
      <if test="record.dId != null">
        d_id = #{record.dId,jdbcType=INTEGER},
      </if>
    </set>
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByExample" parameterType="map">
    update tbl_emp
    set emp_id = #{record.empId,jdbcType=INTEGER},
      emp_name = #{record.empName,jdbcType=VARCHAR},
      gender = #{record.gender,jdbcType=CHAR},
      email = #{record.email,jdbcType=VARCHAR},
      d_id = #{record.dId,jdbcType=INTEGER}
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByPrimaryKeySelective" parameterType="com.atguigu.crud.bean.Employee">
    update tbl_emp
    <set>
      <if test="empName != null">
        emp_name = #{empName,jdbcType=VARCHAR},
      </if>
      <if test="gender != null">
        gender = #{gender,jdbcType=CHAR},
      </if>
      <if test="email != null">
        email = #{email,jdbcType=VARCHAR},
      </if>
      <if test="dId != null">
        d_id = #{dId,jdbcType=INTEGER},
      </if>
    </set>
    where emp_id = #{empId,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.atguigu.crud.bean.Employee">
    update tbl_emp
    set emp_name = #{empName,jdbcType=VARCHAR},
      gender = #{gender,jdbcType=CHAR},
      email = #{email,jdbcType=VARCHAR},
      d_id = #{dId,jdbcType=INTEGER}
    where emp_id = #{empId,jdbcType=INTEGER}
  </update>
</mapper>

11、尚硅谷_SSM高级整合_基础模块_搭建Spring单元测试环境.avi
接下面我们测试下上面的mapper接口是否正确
我们首先需要在maven中导入spring测试所需要的jar包

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>

@ContextConfiguration(locations={"classpath:applicationContext.xml"})帮我们自动创建需要的IOC容器的对象，我们配置了

在运行单位测试的时候，会给我们自动创建dao层的对象

在测试的时候运行报错，有两个地位不对，第一在maven中没有添加aop的jar包

<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>

<tx:method name="*"/>

<tx:method name="get*" read-only="true"/>
</tx:attributes>
</tx:advice>

这样运行上面的代码就会报错。我们应该在pom.xml中增加aop的jar包

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.aitigugu</groupId>
  <artifactId>SSM</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>SSM</name>
  <description/>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <version>3.0</version>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
</dependency>
<dependency> 
   <groupId>javax.servlet.jsp</groupId> 
   <artifactId>jsp-api</artifactId> 
   <version>2.1</version> 
   <scope>provided</scope>
</dependency>
  <!-- 配置springmvc -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 <!-- 配置springjdbc -->
 <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 <!-- 配置spring aop -->
 <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 
 <!-- 配置mybatis -->
 <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.2</version>
</dependency>
<!-- 配置mybatis和spring整合的jar包 -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.0</version>
</dependency>

<!-- 配置c3p0 -->
<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
<dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1</version>
</dependency>

<!-- 配置mysql驱动 -->
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.41</version>
</dependency>

<!-- 配置jstl -->
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl -->
<dependency>
    <groupId>javax.servlet.jsp.jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

<!-- 配置junit -->
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

<!-- 配置mybatis逆向工程的jar包依赖 -->
            <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>

<!-- 导入spring框架测试所需要的jar -->
<!--Spring-test -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>
    <!-- Spring面向切面编程 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>
 
  </dependencies>
</project>

第二还有问题，上面还没有配置mybatis-config.xml，运行测试的时候也会报错

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
   <!-- 开启驼峰命名 -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <!-- 给下面com.atguigu.crud.bean启用别名，默认就是类名的第一个字母小写Employee对应的别名就是employee -->
    <typeAliases>
        <package name="com.atguigu.crud.bean"/>
    </typeAliases>    
</configuration>

有了上面的配置之后，我们就可以编写测试程序，测试上面对应的mysql的生成的mapper接口了
 
接下来我们进行测试，给部门表添加两个部门

我们首先给Department.java添加构造函数

package com.atguigu.crud.bean;

public class Department {
    private Integer deptId;

    private String deptName;
    
    

    public Department() {
        super();
    }

    public Department(Integer deptId, String deptName) {
        super();
        this.deptId = deptId;
        this.deptName = deptName;
    }

    public Integer getDeptId() {
        return deptId;
    }

    public void setDeptId(Integer deptId) {
        this.deptId = deptId;
    }

    public String getDeptName() {
        return deptName;
    }

    public void setDeptName(String deptName) {
        this.deptName = deptName == null ? null : deptName.trim();
    }
}

我们来看编写的测试函数

package com.atguigu.crud.test;

import java.util.UUID;

import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.atguigu.crud.bean.Department;
import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.dao.DepartmentMapper;
import com.atguigu.crud.dao.EmployeeMapper;

/**
 * 测试dao层的工作
 * @author lfy
 *推荐Spring的项目就可以使用Spring的单元测试，可以自动注入我们需要的组件
 *1、导入SpringTest模块
 *2、@ContextConfiguration指定Spring配置文件的位置
 *3、直接autowired要使用的组件即可
 */

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath*:applicationContext.xml"})
public class MapperTest {
    
    @Autowired
    private DepartmentMapper departmentMapper;
    
    /**
     * 测试DepartmentMapper
     */
    @Test
    public void testCRUD(){
    /*    //1、创建SpringIOC容器
        ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");
        //2、从容器中获取mapper
        DepartmentMapper bean = ioc.getBean(DepartmentMapper.class);*/
        System.out.println(departmentMapper);
        departmentMapper.insertSelective(new Department(null,"研发部"));
        departmentMapper.insertSelective(new Department(null,"测试部"));
        

        
    }

}

在上面spring和mybatis整合的时候我们还需要在spring的xml文件中进行配置，SqlSessionTemplate 是 MyBatis-Spring 的核心。 这个类负责管理 MyBatis 的 SqlSession, 调用 MyBatis 的 SQL 方法, 翻译异常。 SqlSessionTemplate 是线程安全的。
无论是多个dao使用一个SqlSessionTemplate，还是一个dao使用一个SqlSessionTemplate，SqlSessionTemplate都是对应一个sqlSession，当多个web线程调用同一个dao时，它们使用的是同一个SqlSessionTemplate，也就是同一个SqlSession，如何保证线程安全，关键就在于代理：
SqlSessionTemplate有两个构造函数，第一个参数关联下面的sqlSessionFactory

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

<property name="configLocation" value="classpath:mybatis-config.xml"></property>

<property name="dataSource" ref="pooledDataSource"></property>

<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
</bean>

第二个参数是对应的操作sql的类型，如果是批量操作，value="BATCH"在很多情况下第二个参数都没有进行配置

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
<constructor-arg name="executorType" value="BATCH"></constructor-arg>
</bean>

现在我们要批量插入数据，批量插入员工，我们在spring的配置文件中进行下面的配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
    
    <!-- 配置c3p0数据源 -->
    <!-- 引入外部的数据库配置文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <!-- 配置spring的IOC，但是不能扫描springmvc的controller，spring 扫描service dao utils的bean
    controller由springmvc去扫描 -->
    
    <context:component-scan base-package="com.aiguigu" use-default-filters="false">
     <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    <!--================== 配置和MyBatis的整合=============== -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定mybatis全局配置文件的位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 数据源就是上面配置的c3p0数据源 -->
        <property name="dataSource" ref="pooledDataSource"></property>
        <!-- 指定mybatis，mapper文件的位置 ，扫描mapper文件夹下面的所有配置文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    </bean>
        
    <!-- 配置一个可以执行批量的sqlSession -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
        <constructor-arg name="executorType" value="BATCH"></constructor-arg>
    </bean>
    <!-- 通过自动扫描简化mapper的配置

前面的章节可以看到，我们的dao需要一个一个的配置在配置文件中，
如果有很多个dao的话配置文件就会非常大，这样管理起来就会比较痛苦。
幸好mybatis团队也意识到了这点，
他们利用spring提供的自动扫描功能封装了一个自动扫描dao的工具类，这样我们就可以使用这个功能简化配置： -->

    <!-- 配置扫描器，将mybatis接口的实现加入到ioc容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--扫描所有dao接口的实现，加入到ioc容器中 -->
        <property name="basePackage" value="com.atguigu.crud.dao"></property>
    </bean>
    
    <!-- ===============事务控制的配置 ================-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--控制住数据源  -->
        <property name="dataSource" ref="pooledDataSource"></property>
    </bean>
    <!--开启基于注解的事务，使用xml配置形式的事务（必要主要的都是使用配置式）  -->
    
    
    <!--配置事务增强，事务如何切入  -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 所有方法都是事务方法 -->
            <tx:method name="*"/>
            <!--以get开始的所有方法  -->
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    
     <!-- 配置哪些类的哪些方法使用事务（配置事务边界，配置Pointcut） -->
    <aop:config>
        <aop:pointcut id="allManagerMethod" expression="execution(* com.weiyuan.test.service.*.*(..))"/>
        <aop:advisor pointcut-ref="allManagerMethod" advice-ref="txAdvice"/>
    </aop:config> 
    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
 
        
    
</beans>

参考博客：https://blog.csdn.net/u010502101/article/details/79187376

接下来我们在测试文件中批量插入员工

我们首先也是给员工表添加构造函数

package com.atguigu.crud.bean;

public class Employee {
    private Integer empId;

    private String empName;

    private String gender;

    private String email;

    private Integer dId;
    
    //希望查询员工的同时部门信息也是查询好的
    private Department department;
    
    

    public Employee() {
        super();
    }

    public Employee(Integer empId, String empName, String gender, String email,
            Integer dId) {
        super();
        this.empId = empId;
        this.empName = empName;
        this.gender = gender;
        this.email = email;
        this.dId = dId;
    }

    public Department getDepartment() {
        return department;
    }

    public void setDepartment(Department department) {
        this.department = department;
    }

    public Integer getEmpId() {
        return empId;
    }

    public void setEmpId(Integer empId) {
        this.empId = empId;
    }

    public String getEmpName() {
        return empName;
    }

    public void setEmpName(String empName) {
        this.empName = empName == null ? null : empName.trim();
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender == null ? null : gender.trim();
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email == null ? null : email.trim();
    }

    public Integer getdId() {
        return dId;
    }

    public void setdId(Integer dId) {
        this.dId = dId;
    }
}

我们来看下对应的测试程序的代码

package com.atguigu.crud.test;

import java.util.UUID;

import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.atguigu.crud.bean.Department;
import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.dao.DepartmentMapper;
import com.atguigu.crud.dao.EmployeeMapper;

/**
 * 测试dao层的工作
 * @author lfy
 *推荐Spring的项目就可以使用Spring的单元测试，可以自动注入我们需要的组件
 *1、导入SpringTest模块
 *2、@ContextConfiguration指定Spring配置文件的位置
 *3、直接autowired要使用的组件即可
 */

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath*:applicationContext.xml"})
public class MapperTest {
    
    @Autowired
    private DepartmentMapper departmentMapper;
    
    @Autowired
    SqlSession sqlSession;
    
    /**
     * 测试DepartmentMapper
     */
    @Test
    public void testCRUD(){
    //mybatis批量插入数据
    EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);    
     for(int i = 0 ;i < 1000;i++){
         String name = UUID.randomUUID().toString().substring(0,5)+i;
         mapper.insertSelective(new Employee(null,name,"M",name+"@qq.com",1));
     }
        
    }

}

12、尚硅谷_SSM高级整合_查询_分页后台代码完成.avi

首先我们访问index.jsp页面的时候访问到对应的controller

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!-- 进行查询全部联系人的业务操作 -->
<jsp:forward page="${pageContext.request.contextPath}/emps"></jsp:forward>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
      <!-- 使用bootstar还需要使用jquery库 -->
    <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
    <script src="static/js/jquery-1.12.4.min.js"></script>
   <!-- Bootstrap -->
    <link href="static/bootstrap-3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
     <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
    <script src=static/bootstrap-3.3.7/dist/js/bootstrap.min.js"></script>

  </head>
  
  <body>
    This is my JSP page. <br>
  </body>
</html>

接下来我们进行分页查询

做分页查询我们使用的是Mybatis分页插件PageHelper简单使用

我们在pom.xml中配置所需的jar包的依赖

<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.0.0</version>
</dependency>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.aitigugu</groupId>
  <artifactId>SSM</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>SSM</name>
  <description/>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <version>3.0</version>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
</dependency>
<dependency> 
   <groupId>javax.servlet.jsp</groupId> 
   <artifactId>jsp-api</artifactId> 
   <version>2.1</version> 
   <scope>provided</scope>
</dependency>
  <!-- 配置springmvc -->
  <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 <!-- 配置springjdbc -->
 <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 <!-- 配置spring aop -->
 <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>4.3.7.RELEASE</version>
</dependency>
 
 <!-- 配置mybatis -->
 <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.2</version>
</dependency>
<!-- 配置mybatis和spring整合的jar包 -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.0</version>
</dependency>

<!-- 配置c3p0 -->
<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
<dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1</version>
</dependency>

<!-- 配置mysql驱动 -->
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.41</version>
</dependency>

<!-- 配置jstl -->
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl -->
<dependency>
    <groupId>javax.servlet.jsp.jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

<!-- 配置junit -->
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

<!-- 配置mybatis逆向工程的jar包依赖 -->
            <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>

<!-- 导入spring框架测试所需要的jar -->
<!--Spring-test -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>
    <!-- Spring面向切面编程 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>
 <!-- 引入mybatis分页查询的插件 -->
 
        <!--引入pageHelper分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.0.0</version>
        </dependency>
  </dependencies>
</project>

第二步：需要在mybatis的配置文件中進行配置

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
   <!-- 开启驼峰命名 -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <!-- 给下面com.atguigu.crud.bean启用别名，默认就是类名的第一个字母小写Employee对应的别名就是employee -->
    <typeAliases>
        <package name="com.atguigu.crud.bean"/>
    </typeAliases>    
    
    <!-- 需要注意的是分页插件必须放在<typeAliases>的后面 -->
    <plugins>
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
            <!--分页参数合理化  -->
            <property name="reasonable" value="true"/>
        </plugin>
    </plugins>
</configuration>

有了上面的兩步之後再代碼中就可以使用分頁查詢了

接下來我們來看看控制層的代碼EmployeeController.java

package com.atguigu.crud.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.service.EmployeeService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;

/**
 * 
 * 处理员工的增删改查操作
 * */
@Controller
public class EmployeeController {
   
     @Autowired
     EmployeeService employeeService;
    
    @RequestMapping("/emps")
    public String getEmps(@RequestParam(value="pn",defaultValue ="1") Integer pn,Model model) {
        
        //使用mybatis分页插件 pn表示当前查询的页数，5表示每页显示第几条
        PageHelper.startPage(pn, 5);
        //在PageHelper.startPage(pn, 5);后面的查询语句就可以实现分页查询
        List<Employee> list = employeeService.getAll();
        //我们将查询的结果封装到PageInfo对象之中,5表示右下角导航栏的数目是5
        PageInfo info = new PageInfo(list,5);
        //这些右下角导航栏显示的数目
        model.addAttribute("pageInfo", info);
        return "lists";
    }
}

接下面我們來看看業務層的代碼

EmployeeService.java

package com.atguigu.crud.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.dao.EmployeeMapper;

@Service
public class EmployeeService {

    @Autowired
    private EmployeeMapper mapper;
    
    public List<Employee> getAll(){
        List<Employee> list = mapper.selectByExampleWithDept(null);
        return list;
    }
}

這就可以了

13、尚硅谷_SSM高级整合_查询_使用Spring单元测试测试分页请求.av

上面我們寫好了分页查询的操作，我们可以使用spring的单元测试来测试springmvc的请求

我们使用SpringMVC 测试 mockMVC这个框架来进行测试Spring MVC学习总结（14）——SpringMVC测试框架之mockMVC详解

我们来看下我们的测试程序

package com.atguigu.crud.test;

import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;

import com.atguigu.crud.bean.Employee;
import com.github.pagehelper.PageInfo;

/**
 * 使用Spring测试模块提供的测试请求功能，测试curd请求的正确性
 * Spring4测试的时候，需要servlet3.0的支持
 * @author lfy
 * 
 */
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(locations = { "classpath:applicationContext.xml",
        "classpath:dispatcher-servlet.xml" })
public class MvcTest {
    // 传入Springmvc的ioc
    @Autowired
    WebApplicationContext context;
    // 虚拟mvc请求，获取到处理结果。
    MockMvc mockMvc;

    @Before
    public void initMokcMvc() {
        mockMvc = MockMvcBuilders.webAppContextSetup(context).build();
    }

    @Test
    public void testPage() throws Exception {
        //模拟请求拿到返回值
        MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get("/emps").param("pn", "5"))
                .andReturn();
        
        //请求成功以后，请求域中会有pageInfo；我们可以取出pageInfo进行验证
        MockHttpServletRequest request = result.getRequest();
        PageInfo pi = (PageInfo) request.getAttribute("pageInfo");
        System.out.println("当前页码："+pi.getPageNum());
        System.out.println("总页码："+pi.getPages());
        System.out.println("总记录数："+pi.getTotal());
        System.out.println("在页面需要连续显示的页码");
        int[] nums = pi.getNavigatepageNums();
        for (int i : nums) {
            System.out.print(" "+i);
        }
        
        //获取员工数据
        List<Employee> list = pi.getList();
        for (Employee employee : list) {
            System.out.println("ID："+employee.getEmpId()+"==>Name:"+employee.getEmpName());
        }
        
    }

}

有下面几点需要注意的：加载配置文件的时候除了加载spring的配置文件，这里还要加载springmvc的配置文件

第二：这里要添加@WebAppConfiguration，在代码

@Autowired
WebApplicationContext context;

才能获得对应的依赖注入

第三：在spring中药配置自定扫描IOC容器，在代码里面有点错误

原来的代码是

<context:component-scan base-package="com.atguigu" use-default-filters="false">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
应该讲use-default-filters="false"去除掉，否则扫描不到对应的业务层

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
    
    <!-- 配置c3p0数据源 -->
    <!-- 引入外部的数据库配置文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <!-- 配置spring的IOC，但是不能扫描springmvc的controller，spring 扫描service dao utils的bean
    controller由springmvc去扫描 -->
    
    <context:component-scan base-package="com.atguigu">
     <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    
    
    <!--================== 配置和MyBatis的整合=============== -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定mybatis全局配置文件的位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 数据源就是上面配置的c3p0数据源 -->
        <property name="dataSource" ref="pooledDataSource"></property>
        <!-- 指定mybatis，mapper文件的位置 ，扫描mapper文件夹下面的所有配置文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    </bean>
        
    <!-- 配置一个可以执行批量的sqlSession -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
        <constructor-arg name="executorType" value="BATCH"></constructor-arg>
    </bean>
    <!-- 通过自动扫描简化mapper的配置

前面的章节可以看到，我们的dao需要一个一个的配置在配置文件中，
如果有很多个dao的话配置文件就会非常大，这样管理起来就会比较痛苦。
幸好mybatis团队也意识到了这点，
他们利用spring提供的自动扫描功能封装了一个自动扫描dao的工具类，这样我们就可以使用这个功能简化配置： -->

    <!-- 配置扫描器，将mybatis接口的实现加入到ioc容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--扫描所有dao接口的实现，加入到ioc容器中 -->
        <property name="basePackage" value="com.atguigu.crud.dao"></property>
    </bean>
    
    <!-- ===============事务控制的配置 ================-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--控制住数据源  -->
        <property name="dataSource" ref="pooledDataSource"></property>
    </bean>
    <!--开启基于注解的事务，使用xml配置形式的事务（必要主要的都是使用配置式）  -->
    
    
    <!--配置事务增强，事务如何切入  -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 所有方法都是事务方法 -->
            <tx:method name="*"/>
            <!--以get开始的所有方法  -->
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    
     <!-- 配置哪些类的哪些方法使用事务（配置事务边界，配置Pointcut） -->
    <aop:config>
        <aop:pointcut id="allManagerMethod" expression="execution(* com.weiyuan.test.service.*.*(..))"/>
        <aop:advisor pointcut-ref="allManagerMethod" advice-ref="txAdvice"/>
    </aop:config> 
    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
 
        
    
</beans>

springmvc的配置文件dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
                        http://www.springframework.org/schema/task
                        http://www.springframework.org/schema/task/spring-task-3.1.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">

    <!-- 配置扫描控制器 ，springmvc值扫描controler，其他的对象都让spring去管理,这里use-default-filters="false"要设置成false-->
    <context:component-scan base-package="com.atguigu" use-default-filters="false">
      <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器 -->
    <!-- 配置视图解析器 -->  
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
    <!-- 配置视图解析器的前缀和后缀 -->  
    <property name="prefix" value="/WEB-INF/views/"></property>  
    <property name="suffix" value=".jsp"></property>  
</bean>  
 
 <!-- 配置允许访问静态资源文件 -->
 <mvc:default-servlet-handler/>
 <!-- 支持springmvc的更加高级的东西 -->
 <mvc:annotation-driven></mvc:annotation-driven>
 
 

</beans>

我们允许下测试程序运行效果如下所示

当前页码：5
总页码：200
总记录数：1000
在页面需要连续显示的页码
3 4 5 6 7ID：21==>Name:88a3420
ID：22==>Name:82dd021
ID：23==>Name:1dacb22
ID：24==>Name:8b20423
ID：25==>Name:2a85c24

14、尚硅谷_SSM高级整合_查询_搭建Bootstrap分页页面.avi

接下来我们在list页面我们要展现查询出来的员工信息

lists.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>员工列表</title>
<%
    pageContext.setAttribute("APP_PATH", request.getContextPath());
%>
<!-- web路径：
不以/开始的相对路径，找资源，以当前资源的路径为基准，经常容易出问题。
以/开始的相对路径，找资源，以服务器的路径为标准(http://localhost:3306)；需要加上项目名
        http://localhost:3306/crud
 -->
<script type="text/javascript"
    src="${APP_PATH }/static/js/jquery-1.12.4.min.js"></script>
<link
    href="${APP_PATH }/static/bootstrap-3.3.7/dist/css/bootstrap.min.css"
    rel="stylesheet">
<script
    src="${APP_PATH }/static/bootstrap-3.3.7/dist/js/bootstrap.min.js"></script>
</head>
<body>
    <!-- 搭建显示页面 -->
    <div class="container">
        <!-- 标题 -->
        <div class="row">
            <div class="col-md-12">
                <h1>SSM-CRUD</h1>
            </div>
        </div>
        <!-- 按钮 -->
        <div class="row">
            <div class="col-md-4 col-md-offset-8">
                <button class="btn btn-primary">新增</button>
                <button class="btn btn-danger">删除</button>
            </div>
        </div>
        <!-- 显示表格数据 -->
        <div class="row">
            <div class="col-md-12">
                <table class="table table-hover">
                    <tr>
                        <th>#</th>
                        <th>empName</th>
                        <th>gender</th>
                        <th>email</th>
                        <th>deptName</th>
                        <th>操作</th>
                    </tr>
                    <c:forEach items="${pageInfo.list }" var="emp">
                        <tr>
                            <th>${emp.empId }</th>
                            <th>${emp.empName }</th>
                            <th>${emp.gender=="M"?"男":"女" }</th>
                            <th>${emp.email }</th>
                            <th>${emp.department.deptName }</th>
                            <th>
                                <button class="btn btn-primary btn-sm">
                                    <span class="glyphicon glyphicon-pencil" aria-hidden="true"></span>
                                    编辑
                                </button>
                                <button class="btn btn-danger btn-sm">
                                    <span class="glyphicon glyphicon-trash" aria-hidden="true"></span>
                                    删除
                                </button>
                            </th>
                        </tr>
                    </c:forEach>
                </table>
            </div>
        </div>

        <!-- 显示分页信息 -->
        <div class="row">
            <!--分页文字信息  -->
            <div class="col-md-6">当前 ${pageInfo.pageNum }页,总${pageInfo.pages }
                页,总 ${pageInfo.total } 条记录</div>
            <!-- 分页条信息 -->
            <div class="col-md-6">
                <nav aria-label="Page navigation">
                <ul class="pagination">
                    <li><a href="${APP_PATH }/emps?pn=1">首页</a></li>
                    <c:if test="${pageInfo.hasPreviousPage }">
                        <li><a href="${APP_PATH }/emps?pn=${pageInfo.pageNum-1}"
                            aria-label="Previous"> <span aria-hidden="true">&laquo;</span>
                        </a></li>
                    </c:if>


                    <c:forEach items="${pageInfo.navigatepageNums }" var="page_Num">
                        <c:if test="${page_Num == pageInfo.pageNum }">
                            <li class="active"><a href="#">${page_Num }</a></li>
                        </c:if>
                        <c:if test="${page_Num != pageInfo.pageNum }">
                            <li><a href="${APP_PATH }/emps?pn=${page_Num }">${page_Num }</a></li>
                        </c:if>

                    </c:forEach>
                    <c:if test="${pageInfo.hasNextPage }">
                        <li><a href="${APP_PATH }/emps?pn=${pageInfo.pageNum+1 }"
                            aria-label="Next"> <span aria-hidden="true">&raquo;</span>
                        </a></li>
                    </c:if>
                    <li><a href="${APP_PATH }/emps?pn=${pageInfo.pages}">末页</a></li>
                </ul>
                </nav>
            </div>
        </div>
        
    </div>
</body>
</html>

我们在测试的时候发现了问题jstl Maven 依赖导致的 Jar 包冲突

概述

　　Jar 包冲突是日常开发过程中，时常会遇到的问题。本文介绍由 jstl 的 Maven 依赖导致的 Jar 包冲突问题，以及对应的解决方法。

jstl 的 Maven 依赖配置
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>

<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
　一般来说，只要 pom 文件配置好了 Maven 依赖后，一般都不会有太大的问题。可是，就是这么一个简单的依赖，导致了整个项目都无法启动了，经过一段时间的排查，最终锁定了问题所在。

　　Tomcat 类库

　　

　　　　项目编译后的类库
从上面的2个截图可以看出，jsp-api 和 servlet-api 这2个 Jar 包重复了，通过进一步的排查，最终确认项目编译后的类库多出来的2个 Jar 是由于 jstl-api Jar 包的依赖，通过 Maven 编译到项目的类库中的，与 Tomcat 的类库中对应的2个 Jar 包起了冲突，找到问题的起因后，对 pom 文件做了调整，不编译 jstl-api Jar 包的依赖的 Jar 包即可解决问题，具体调整如下：

<dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet.jsp</groupId>
                    <artifactId>jsp-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

我们来看修改之后的pom.xml;文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.atguigu</groupId>
    <artifactId>ssm-crud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>


    <!--引入项目依赖的jar包 -->
    <!-- SpringMVC、Spring -->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependencies>

        <!--引入pageHelper分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.0.0</version>
        </dependency>

        <!-- MBG -->
        <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>


        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!-- 返回json字符串的支持 -->
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.8</version>
        </dependency>

        <!--JSR303数据校验支持；tomcat7及以上的服务器， 
        tomcat7以下的服务器：el表达式。额外给服务器的lib包中替换新的标准的el
        -->
        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.4.1.Final</version>
        </dependency>


        <!-- Spring-Jdbc -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!--Spring-test -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>


        <!-- Spring面向切面编程 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!--MyBatis -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.2</version>
        </dependency>
        <!-- MyBatis整合Spring的适配包 -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- 数据库连接池、驱动 -->
        <!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <!-- （jstl，servlet-api，junit） -->
        <!-- https://mvnrepository.com/artifact/jstl/jstl -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet.jsp</groupId>
                    <artifactId>jsp-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>


        <!-- junit -->
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>




</project>

具体参考博客https://www.cnblogs.com/rexfang/p/6642506.html

运行之后的页面效果如下所示

自己在编写项目的时候还要到下面的两个问题：

第一：maven项目在启动tomact服务器的时候报错

Error configuring application listener of class org.springframework.web.context.ContextLoaderListener java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

解决的办法是：

在初学使用maven构建javaWeb的项目的时候，启动tomcat加载时，总是提示如下错误，辛苦一番终于找到解决办法。

严重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

根本原因：jar文件没有同步发布到自己项目的lib目录中

解决办法：项目点击右键点击 Properties 选择Deployment Assembly

　　再点击右边的Add按钮选择Java Build Path Entries后点击Next按钮然后选择你的Maven Dependencies 确定即可

至此，问题已经解决。

第二个问题是:

list.jsp要访问css和js文件，无法访问成功，为啥了

今天帮一个同学找出了web项目问题的原因，这个问题是关于WEB-INF下的jsp文件如何访问css和js文件。

先看一下文件的大致位置（jsp与css文件都同处WEB-INF内）：

该同学想WEB-INF里面的head.jsp文件加载同目录下的head.css文件，用了如下常规的方法：

发现怎么都加载不了该css文件，后来又尝试了好几种都不见效。

我们都知道，为了安全，我们会将绝大部分的jsp文件放入我们的WEB-INF中，然后利用外部

的index.jsp中的forward语句来访问其内部文件，这是因为WEB-INF内部文件是受保护的，想

到这一点，猜测jsp获取不了css文件的原因可能是某段路径被拦截了，所以就尝试着用获取当

前项目的根地址来加载css，代码如下：

结果还是无法加载WEB-INF里面的css文件，百思不得其解，尔后又尝试着将css文件放在了

Web-Root下面，即与WEB-INF同级，如图：

发现用上面两种方法都可以加载到css文件了。究其原因，是由于将css文件放入了WEB-INF

里面，导致jsp无法正常访问到相应的路径。也就是说css跟js文件是不建议放在WEB-INF目

录下的，一般放在与WEB-INF同级即可。

因为：WEB-INF下的JSP是不能通过URL直接访问的

所以在建立static文件夹，不能存储在web-inf下面，而应该给web-inf同目录

这里一定要注意呀，自己调试了很久才发现这个问题。

index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
 <a href="${pageContext.request.contextPath}/emps">查询所有的员工信息</a>
</body>
</html>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.atguigu</groupId>
    <artifactId>ssm-crud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>


    <!--引入项目依赖的jar包 -->
    <!-- SpringMVC、Spring -->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependencies>

        <!--引入pageHelper分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.0.0</version>
        </dependency>

        <!-- MBG -->
        <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>


        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!-- 返回json字符串的支持 -->
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.8</version>
        </dependency>

        <!--JSR303数据校验支持；tomcat7及以上的服务器， 
        tomcat7以下的服务器：el表达式。额外给服务器的lib包中替换新的标准的el
        -->
        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.4.1.Final</version>
        </dependency>


        <!-- Spring-Jdbc -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!--Spring-test -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>


        <!-- Spring面向切面编程 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!--MyBatis -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.2</version>
        </dependency>
        <!-- MyBatis整合Spring的适配包 -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- 数据库连接池、驱动 -->
        <!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <!-- （jstl，servlet-api，junit） -->
        <!-- https://mvnrepository.com/artifact/jstl/jstl -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet.jsp</groupId>
                    <artifactId>jsp-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>


        <!-- junit -->
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>




</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>SSM</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- 配置spring 的启动文件 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  
  <!-- 配置springmvc的配置文件 -->
    <servlet>  
        <servlet-name>DispatcherServlet</servlet-name><!--在DispatcherServlet的初始化过程中，框架会在web应用的 WEB-INF文件夹下寻找名为[servlet-name]-servlet.xml 的配置文件，生成文件中定义的bean。-->  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <!--指明了配置文件的文件名，不使用默认配置文件名，而使用dispatcher-servlet.xml配置文件。-->  
        <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>classpath:dispatcher-servlet.xml</param-value>  
        </init-param>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <servlet-mapping> 
        <servlet-name>DispatcherServlet</servlet-name>  
        <url-pattern>/</url-pattern>
    </servlet-mapping>  
    
    <!-- 配置中文乱码问题 ，字符编码必须放在所以过滤器之前-->
     <filter>  
        <filter-name>characterEncodingFilter</filter-name>  
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
        <init-param>  
            <param-name>encoding</param-name>  
            <param-value>UTF-8</param-value>  
        </init-param>  
        <init-param>  
            <param-name>forceEncoding</param-name>  
            <param-value>true</param-value>  
        </init-param>  
    </filter>  
    <filter-mapping>  
        <filter-name>characterEncodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
    
    <!-- 为了支持restful风格，需要配置下面的filter -->
    <filter>    
              <filter-name>HiddenHttpMethodFilter</filter-name>    
              <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    
      </filter>    
      <filter-mapping>    
              <filter-name>HiddenHttpMethodFilter</filter-name>    
              <servlet-name>spring</servlet-name>    
      </filter-mapping> 
</web-app>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
    
    <!-- 配置c3p0数据源 -->
    <!-- 引入外部的数据库配置文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <!-- 配置spring的IOC，但是不能扫描springmvc的controller，spring 扫描service dao utils的bean
    controller由springmvc去扫描 -->
    
    <context:component-scan base-package="com.atguigu">
     <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    
    
    <!--================== 配置和MyBatis的整合=============== -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定mybatis全局配置文件的位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 数据源就是上面配置的c3p0数据源 -->
        <property name="dataSource" ref="pooledDataSource"></property>
        <!-- 指定mybatis，mapper文件的位置 ，扫描mapper文件夹下面的所有配置文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    </bean>
        
    <!-- 配置一个可以执行批量的sqlSession -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
        <constructor-arg name="executorType" value="BATCH"></constructor-arg>
    </bean>
    <!-- 通过自动扫描简化mapper的配置

前面的章节可以看到，我们的dao需要一个一个的配置在配置文件中，
如果有很多个dao的话配置文件就会非常大，这样管理起来就会比较痛苦。
幸好mybatis团队也意识到了这点，
他们利用spring提供的自动扫描功能封装了一个自动扫描dao的工具类，这样我们就可以使用这个功能简化配置： -->

    <!-- 配置扫描器，将mybatis接口的实现加入到ioc容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--扫描所有dao接口的实现，加入到ioc容器中 -->
        <property name="basePackage" value="com.atguigu.crud.dao"></property>
    </bean>
    
    <!-- ===============事务控制的配置 ================-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--控制住数据源  -->
        <property name="dataSource" ref="pooledDataSource"></property>
    </bean>
    <!--开启基于注解的事务，使用xml配置形式的事务（必要主要的都是使用配置式）  -->
    
    
    <!--配置事务增强，事务如何切入  -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 所有方法都是事务方法 -->
            <tx:method name="*"/>
            <!--以get开始的所有方法  -->
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    
     <!-- 配置哪些类的哪些方法使用事务（配置事务边界，配置Pointcut） -->
    <aop:config>
        <aop:pointcut id="allManagerMethod" expression="execution(* com.weiyuan.test.service.*.*(..))"/>
        <aop:advisor pointcut-ref="allManagerMethod" advice-ref="txAdvice"/>
    </aop:config> 
    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
 
        
    
</beans>

dbconfig.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm_crud
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123456

dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
                        http://www.springframework.org/schema/task
                        http://www.springframework.org/schema/task/spring-task-3.1.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">

    <!-- 配置扫描控制器 ，springmvc值扫描controler，其他的对象都让spring去管理,这里use-default-filters="false"要设置成false-->
    <context:component-scan base-package="com.atguigu" use-default-filters="false">
      <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器 -->
    <!-- 配置视图解析器 -->  
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
    <!-- 配置视图解析器的前缀和后缀 -->  
    <property name="prefix" value="/WEB-INF/views/"></property>  
    <property name="suffix" value=".jsp"></property>  
</bean>  
 
 <!-- 配置允许访问静态资源文件 -->
 <mvc:default-servlet-handler/>
 <!-- 支持springmvc的更加高级的东西 -->
 <mvc:annotation-driven></mvc:annotation-driven>
 
 

</beans>

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
   <!-- 开启驼峰命名 -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <!-- 给下面com.atguigu.crud.bean启用别名，默认就是类名的第一个字母小写Employee对应的别名就是employee -->
    <typeAliases>
        <package name="com.atguigu.crud.bean"/>
    </typeAliases>    
    
    <!-- 需要注意的是分页插件必须放在<typeAliases>的后面 -->
    <plugins>
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
            <!--分页参数合理化  -->
            <property name="reasonable" value="true"/>
        </plugin>
    </plugins>
</configuration>