SSM(SpringMVC+Spring+Mybatis)

一、搭建SpringMVC

  1、在maven项目中导入spring-webmvc依赖

        <!-- springmvc -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>5.1.8.RELEASE</version>
      </dependency>    

  2、配置web.xml文件,在web.xml文件中添加如下代码

<servlet>
      <servlet-name>HelloWeb</servlet-name>
      <servlet-class>
         org.springframework.web.servlet.DispatcherServlet
      </servlet-class>
      <!-- 将springmvc核心配置文件位置修改到src/main/resources文件下 -->
      <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
      </init-param>
      <load-on-startup>1</load-on-startup>
   </servlet>
   <servlet-mapping>
      <servlet-name>HelloWeb</servlet-name>
      <url-pattern>/</url-pattern>
   </servlet-mapping>

   3、配置springmvc核心配置文件,在src/main/resources文件下创建一个springmvc.xml文件

    文件名必须与web.xml文件中的<param-value>classpath:springmvc.xml</param-value>名一致

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
   http://www.springframework.org/schema/beans     
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <!--扫描com.blb.controller下的注解 -->
    <context:component-scan base-package="com.blb.controller" />

    <!-- 视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

  4、编写测试类

  在src/main/java文件下创建com.blb.controller包,在包下创建一个TestController类

package com.blb.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class TestController {
    
    //向浏览器返回
    @ResponseBody
    //拦截地址
    @RequestMapping("hello")
    public String test(){
        return "hello world";
    }

}

  5、maven配置tomcat和jdk

<build>
    <finalName>SSM_T</finalName>
    <plugins>  
        <!-- jdk配置 -->
        <plugin>  
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>  
            <version>3.1</version>  
            <configuration>  
                <source>1.8</source>  
                <target>1.8</target>  
            </configuration>  
        </plugin>
        
        <!-- 配置apache提供的tomcat插件 -->
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.2</version>
        </plugin>
     </plugins>  
  </build>

  6、测试,启动maven项目

    访问localhost:8080/项目名/hello

    页面出现hello world 表示springmvc搭建成功

 

 二、搭建spring

  1、导入spring相关依赖 spring-context

       <!-- spring -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>5.1.8.RELEASE</version>
      </dependency>    

  2、配置spring核心配置文件

   在src/main/resources文件下创建一个applicationcontext.xml文件

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


</beans>

 

   3、测试是否搭建成功

      1)、编写一个类,将其注入spring的IOC容器中

      User类

package com.blb.entity;

public class User {


    private String id;
    private String username;
    private String password;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
    }
    
}

 

    放入IOC容器中

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

    <bean class="com.blb.entity.User"/>

</beans>

 

      2)、编写测试类测试 

@SuppressWarnings("resource")
    public static void main(String[] args) {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        User user = applicationContext.getBean(User.class);
        System.out.println(user);
        
    }

 

  控制台打印:User [id=null, username=null, password=null]

  spring搭建完成

三、springmvc+spring 整合

    因为springmvc和spring 都是spring的框架,所以不需要做过多的整合,只需要把spring设置为项目启动时启动

    1、在web.xml文件中配置spring监听

<!-- spring -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    2、在springmvc核心配置文件中启动cglib代理

xmlns:aop="http://www.springframework.org/schema/aop"

http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd

        <!-- 启动cglib代理 -->
    <aop:aspectj-autoproxy proxy-target-class="true"/>       

 

四、搭建Mybaits

  1、导入相关依赖 因为我们要连接数据库,所以不仅仅要导入mybatis的依赖,还要导入mysql的依赖,最后我们还要生成日志文件,所以还要到如log4j的依赖

      <!-- mybatis -->
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.5.1</version>
      </dependency>
      <!-- mysql -->
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.47</version>
      </dependency>
      <!-- log4j -->
      <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.17</version>
      </dependency>

 

  

  2、使用mybatis generator自动生成实体类和映射文件

    1)、首先要通过eclipes安装mybatis generator

    2)、创建一个mybatis generator文件

    3)、配置generatorConfig.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="context1">
        <!-- jdbc -->
        <jdbcConnection connectionURL="???" driverClass="???"
            password="???" userId="???" />
            
        <!-- targetPackage 是你要生成的包名 -->
        <!-- targetProject 是你的项目名 -->
        <!-- 实体类 -->
        <javaModelGenerator targetPackage="???"
            targetProject="???" />
            
        <!-- mapper映射文件 -->
        <sqlMapGenerator targetPackage="???" targetProject="???" />
        
        <!-- mapper接口 -->
        <javaClientGenerator targetPackage="???"
            targetProject="???" type="XMLMAPPER" />
            
        <!-- 要生成的表 -->    
        <table  tableName="???">
        </table>
    </context>
</generatorConfiguration>

     4)、运行generator.xml文件,生成实体类和mapper

  3、在src/main/resources文件下创建一个mybatis-cfg.xml文件,并配置

<?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>

    <settings>
        <setting name="logImpl" value="LOG4J" />
        <!-- 开启驼峰命名法,将数据库中A_B的形式转为aB形式 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>

    <typeAliases>
        <!-- <typeAlias type="com.blb.entity.User" alias="user"/> -->
        <!-- 为整个包下面的实体类取别名,别名与类名相同 -->
        <package name="com.blb.entity" />
    </typeAliases>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/数据库名?useUnicode=true&amp;characterEncoding=utf-8" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <!-- 扫描mapper -->
        <package name="com.blb.mapper"/>
    </mappers>

</configuration>

 

  4、配置log4j日志,在src/main/resources文件下创建一个log4j.xml文件,并配置

# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
log4j.logger.com.blb.mapper=TRACE
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

 

  

五、Mybatis+Spring 整合

  1、导入依赖mybatis-spring 依赖 和连接池c3p0依赖

        <!-- mybatis-spring -->
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>2.0.1</version>
      </dependency>

    <!-- c3p0 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>


 

  2、修改applicationContext.xml文件,加入如下代码

<!-- mybatis spring -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:mybatis-conf.xml" />
        <property name="mapperLocations" value="classpath*:com/blb/mapper/*.xml"/>
    </bean>
    
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver">
        </property>
        <property name="jdbcUrl"
            value="jdbc:mysql://localhost:3306/user?useUnicode=true&amp;characterEncoding=utf-8">
        </property>
        <property name="user" value="root" />
        <property name="password" value="root" />
        <property name="maxPoolSize" value="20" />
        <property name="minPoolSize" value="2" />
        <property name="initialPoolSize">
            <value>10</value>
        </property>
        <property name="maxIdleTime" value="60" />
        <property name="idleConnectionTestPeriod" value="60"></property>
        <property name="acquireIncrement">
            <value>5</value>
        </property>
    </bean>
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.blb.mapper" />
    </bean>
    

 

  3、将mybatis-cfg.xml文件中的jdbc连接,和扫描mapper的删除,最后mybatis-cfg.xml的内容为

<?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>

    <settings>
        <setting name="logImpl" value="LOG4J" />
        <!-- 开启驼峰命名法,将数据库中A_B的形式转为aB形式 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>

    <typeAliases>
        <!-- <typeAlias type="com.blb.entity.User" alias="user"/> -->
        <!-- 为整个包下面的实体类取别名,别名与类名相同 -->
        <package name="com.blb.entity" />
    </typeAliases>

</configuration>

 

六、开启注解式事务

  1、在applicationContext.xml文件中配置

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd

    <!-- 事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <constructor-arg ref="dataSource" />
    </bean>

    <!-- 开启注解器事务 -->
    <tx:annotation-driven transaction-manager="transactionManager" />

  2、在对数据库操作的方法上面加上@Transactional ,方法必须抛出异常

@Transactional(rollbackFor=Exception.class)

 

posted @ 2019-07-06 11:34  Just_do_IT_001  阅读(278)  评论(0编辑  收藏  举报