Spring整合web以及JDBC项目以及在tomcat中启动spring容器和获取bean(步骤正确),以及整合mybatis

一Spring整合web项目

连接池有c3p0,dbcp

　　1.1基本用法

　　1,2.添加jar包　

　　　　1.2.1 spring ioc的4个包:spring-core,spring-beans,spring-context,spring-expression

　　

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.3.20</version>
</dependency>

　　　　1.2.2spring-aop的3个包:spring-aop,spring-aspects,spring-cglib

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>

　　　　　1.2.3Java EE的3个包javax.servlet-api,jstl,jsp-api

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>

　　　　1.2.4spring-web的包:spring-web和tomcat7-maven-plugin

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.21</version>
</dependency>

<dependency>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
</dependency>

web项目中的web.xml文件头

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<display-name>Archetype Created Web Application</display-name>
</web-app>

挂载tomcat插件

 

 

 1.2初始化Spring容器

　　将Ioc容器的初始化交给web容器管理

 

 

<build>
<finalName>spring-web</finalName>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8888</port>
</configuration>
</plugin>
</plugins>
</build>

1.2初始化Spring容器

　　将Ioc容器的初始化交给Web容器管理

　　初始化IoC容器,通过一个监听器来进行初始化,在应用项目的web.xml里面配置

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

 

 

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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yyp</groupId>
<artifactId>spring-web</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>spring-web Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>

<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.6</version>
</dependency>
<!--整合spring-ioc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.3.20</version>
</dependency>

<!-- spring-aop的包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>
<!-- 整合java EE的包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>

<!-- 整合spring-web包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.21</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
<dependency>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>

<scope>provided</scope>

</dependency>

</dependencies>
<build>
<finalName>spring-web</finalName>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>
</project>

web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<display-name>Archetype Created Web Application</display-name>
<!-- 初始化Spring容器 ,在ttomcat容器中配置spring容器,在tomcat启动的时候顺便启动spring容器-->
<!-- <context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> -->
</web-app>

 spring.xml文件头部:

<?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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
<!-- 配置扫描包 -->

</beans>

 

编写工具类,通过工具类,在tomcat中得到spring的容器

package com.yyp.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class SpringBeanHolder implements ApplicationContextAware {
private static ApplicationContext ac;

@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
ac = applicationContext;

}

public static Object getBean(String beanName) {
return ac.getBean(beanName);
}

public static <T> T getBean(Class<T> clazz) {
return ac.getBean(clazz);
}
}

 

在Servlet中访问得到spring的容器和bean

package com.yyp.action;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.yyp.dao.User;
import com.yyp.service.UserService;
import com.yyp.util.SpringBeanHolder;

/**
* servlet是由web容器管理的,不能交由spring容器管理
*
* @author YYP
*
*/
@WebServlet("/login")
public class UserServlet extends HttpServlet {
// 用来完成页面的跳转访问
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.getRequestDispatcher("/WEB-INF/view/login.jsp").forward(req, resp);
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String username = req.getParameter("username");
String password = req.getParameter("password");

//通过工具类的静态方法获取spring容器中的bean
UserService userService = (UserService) SpringBeanHolder.getBean("userService");
User user = userService.login(username, password);
if (user != null) {
req.getSession().setAttribute("user", user);
req.getRequestDispatcher("/WEB-INF/view/success.jsp").forward(req, resp);

} else {
req.setAttribute("loginError", "用户名或密码错误");
req.getRequestDispatcher("/WEB-INF/view/login.jsp").forward(req, resp);
}
}
}

 工具类也要加到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"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
</beans>

经验总结:上述的扫描包配置如果错误,或者pojo里面的实体类错误,也会导致编译不会通过

 2.1关于spring的配置文件

　　当未指定contextConfigLocation参数时,默认会读取/WEB-INf/application.xml文件

 

在web.xml中<!-- 配置过滤器解决POST请求乱码问题,使用utf-8 -->

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>Archetype Created Web Application</display-name>
<!-- 启动Spring的容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置过滤器解决POST请求乱码问题 -->
<filter>
<filter-name>encodingFilter</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>
</filter>
<filter-mapping>

<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

二.Spring整合JDBC

 1.基本用法:

  1.1添加依赖jar

　　　　spring-jdbc:这个是spring整合jdbc的时候要加的包

　　　　spring-tx:数据库事务包

  　　　 mysql-connector-java:数据库驱动

 

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yyp</groupId>
<artifactId>spring-web</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>spring-web Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- 整合jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.18</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.3.21</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.27</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.6</version>
</dependency>
<!--整合spring-ioc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.3.20</version>
</dependency>

<!-- spring-aop的包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>
<!-- 整合java EE的包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>

<!-- 整合spring-web包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.21</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
<dependency>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.ow2.asm/asm -->
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>7.1</version>
</dependency>

</dependencies>
<build>
<finalName>spring-web</finalName>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.10.1</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M7</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>3.0.0-M1</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>3.0.0-M2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>4.0.0-M1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.3.0</version>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>
</project>

1.2配置DAO

　DataSource---->jdbcTemplate----->Dao----->Service------->Action

安装mysql数据库,数据库采用的是5.7.37,创表语句如下:

create database spring;
use spring;
create table t_user(
id int primary key auto_increment,
username varchar(200) not null unique,
password varchar(200)
)engine=Innodb default charset=utf8;
insert into t_user(username,password) value('admin','123');
insert into t_user(username,password) value('tom','123');

创建UserMapper类

package com.yyp.mapper;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import com.yyp.pojo.User;

public class UserMapper implements RowMapper {
@Override
public Object mapRow(ResultSet rs, int i) throws SQLException {
return new User(rs.getInt("id"), rs.getString("username"), rs.getString("password"));
}

}

创建修改UserDaoImple类

package com.yyp.dao.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import com.yyp.dao.UserDao;
import com.yyp.mapper.UserMapper;
import com.yyp.pojo.User;

@Repository
public class UserDaoImpl implements UserDao {
@Autowired
private JdbcTemplate jdbcTemplate;

@Override
public User selectByUsername(String username) {
String sql = "select id,username,password from t_user where username=?";
List<User> users = jdbcTemplate.query(sql, new Object[] { username }, new UserMapper());
if (users != null && users.size() > 0) {
return users.get(0);
}
return null;
}

}

配置JdbcTemplate到spring.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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate"/>
</beans>

配置数据源

 DataSource的实现方式:

　　1.使用spring提供的数据源,没有连接池的功能,效率低

　　配置数据源spring.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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
</beans>

   2.在resources创建dataSource.properties配置文件　　

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=12345678

 3.配置数据属性文件的读取spring.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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<!-- 读取数据库的属性配置文件dataSource.properties -->
<context:property-placeholder location="classpath:dataSource.properties"/>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
</beans>

 4.使用另外一种数据源dbcp

   4.1在pom.xml配置dbcp的jar包      

<!-- 整合dbcp包 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>

   4.2 .spring.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<!-- 读取数据库的属性配置文件dataSource.properties -->
<context:property-placeholder
location="classpath:dataSource.properties" />
<bean id="dataSource1"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 使用dbcp数据源 -->
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />

</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
</beans>

 

项目完成:

所有配置文件如下:总共4个配置文件+1个创库sql

pom.xml

web.xml

spring.xml

dataSource.properties

create.sql

 

1.pom.xml配置文件

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yyp</groupId>
<artifactId>spring-web</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>spring-web Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- 整合dbcp包 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>

<!-- 整合jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.18</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.3.21</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.27</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.6</version>
</dependency>
<!--整合spring-ioc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.3.20</version>
</dependency>

<!-- spring-aop的包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>
<!-- 整合java EE的包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>

<!-- 整合spring-web包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.21</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
<dependency>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.ow2.asm/asm -->
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>7.1</version>
</dependency>

</dependencies>
<build>
<finalName>spring-web</finalName>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.10.1</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M7</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>3.0.0-M1</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>3.0.0-M2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>4.0.0-M1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.3.0</version>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>
</project>

 

2.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>Archetype Created Web Application</display-name>
<!-- 启动Spring的容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置过滤器解决POST请求乱码问题 -->
<filter>
<filter-name>encodingFilter</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>
</filter>
<filter-mapping>

<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

3.spring的配置文件spring.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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<!-- 读取数据库的属性配置文件dataSource.properties -->
<context:property-placeholder
location="classpath:dataSource.properties" />
<bean id="dataSource1"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 使用dbcp数据源,这个数据源有连接池的功能,效率会更高一些 -->
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />

<!--dbcp配置数据库连接池-->
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
</beans>

4.dataSource.properties配置文件

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=12345678

 

数据库创库脚本:

cteate.sql文件

create database spring;
use spring;
create table t_user(
id int primary key auto_increment,
username varchar(200) not null unique,
password varchar(200)
)engine=Innodb default charset=utf8;
insert into t_user(username,password) value('admin','123');
insert into t_user(username,password) value('tom','123');

 增加了druid德鲁伊数据库连接池

<?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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<!-- 读取数据库的属性配置文件dataSource.properties -->
<context:property-placeholder
location="classpath:dataSource.properties" />
<bean id="dataSource1"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 使用dbcp数据源,这个数据源有连接池的功能,效率会更高一些 -->
<bean id="dataSource2"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 德鲁伊连接池配置 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
</beans>

 

2.用户注册

　　JDBC默认是自动提交事务的,每执行一条sql语句提交事务

　　　解决:配置事务

3.事务操作

　　3.1事务操作的两种方式

　　定义事务管理器:相当于是事务的通知,就是环绕通知

在spring.xml文件中配置

 

两种方式:

 1.基于命名空间的配置,以下都是基于命名空间的配置

2.另外一种基于注解的配置

3.2事务属性

　　五个事务属性:

　　　　1.传播属性:一般需要配置

　　　　　　propagation:定义事务的边界,用来定义当前方法是否需要事务

　　　　　　常用取值:

　　　　　　　　REQUIRED 必须添加啊事务,如果当前没有事务,则创建一个新的事务,一般用于增删改.

　　　　　　　　SUPPORT可以没有事务,如果当前有事务则运行,如果没有事务也可以运行,一般用于查询操作

　　　　2.隔离级别

　　　　　　　　isolation:用来解决事务并发时会出现的一些问题,

　　　　　　　　四种隔离级别:

　　　　　　　　　　READ_COMMITTED:已提交---->避免脏读,但可能发送不可重复读或者幻读

　　　　　　　　　　READ_UNCOMMITTED:未提交读--->可能会发生脏读和不可重复读,幻读

　　　　　　　　　　REPEATEABLE_READ:可重复读,----->可以避免脏读和不可重复读,可能发生幻读

　　　　　　　　　　SERIALIZABLIE:可以序列化,-->避免脏读,不可重复读或幻读,相当于单并发,没意义

　　　　　　　　事务并发时可能会出现的三个问题

　　　　　　　　　　脏读:一个事务读取到另一个事务没有提交的数据,一般不会发送,如mysql,oracle底层默认都只读取提交的数据

　　　　　　　　　　不可重复:一个事务已经读取数据,另外一个事务在修改数据,可能导致使用的数据与数据库中不同步.

　　　　　　　　　　虚读：一个事务已经读取数据,另外一个事务在添加或删除数据,可能导致使用功能的数据量和数据库不同步

　　　　　　　　　　注意:不可重复读或幻读是小概率事件,可以通过版本检查来解决,如果Hibernate中悲观锁或乐观锁是通过版本检查来实现的,但太麻烦且效率低,实际开发中一般不需要配置隔离级别,大多是通过定制任务+人工审核

　　　　3.回滚条件

　　　　　rollback:默认抛出RuntimeException时才会回滚

　　　　　　 rollbackFor="表示发生该异常时回滚"

　　　　　　noRollbackFor="表示发生异常时不回滚"

　　　　4.只读优化

　　　　　　readOnly:在该事务中只能读取,一般用于查询

　　　　5.超时处理

　　　　　　timeout:配置事务的超时时间,一般不配置

 

3.3事务特许3

　　四个事务腾讯;ACID原子性,一致性,隔离性,永久性

算术异常不回滚:

　　　　

<?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:util="http://www.springframework.org/schema/util"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<!-- 读取数据库的属性配置文件dataSource.properties -->
<context:property-placeholder
location="classpath:dataSource.properties" />
<bean id="dataSource1"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 使用dbcp数据源,这个数据源有连接池的功能,效率会更高一些 -->
<bean id="dataSource2"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 德鲁伊连接池配置 -->
<bean id="dataSource"
class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
<!-- 配置事务管理器,相当于我们的环绕通知 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 配置事务的属性 -->
<!-- 配置通知 -->
<tx:advice id="txAdvice"
transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="login" propagation="SUPPORTS"
read-only="true" />
<!-- rollback-for="java.lang.Exception" -->
<tx:method name="regist" propagation="REQUIRED"
isolation="READ_COMMITTED"

no-rollback-for="ava.lang.ArithmeticException" timeout="5000" />
</tx:attributes>

</tx:advice>
<!-- 配置Pointcut并织入 -->
<aop:config>
<aop:pointcut id="pc"
expression="execution(* com.yyp.service.impl.*.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="pc" />
</aop:config>

 

二.事务基于注解的配置方式

　　1.配置spring.xml中的事务管理器

<!-- 配置事务管理器,相当于我们的环绕通知 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

　　2.spring.xml里面配置注解驱动

<!-- 方式二,配置注解驱动 -->
<tx:annotation-driven transaction-manager="transcationManager"/>

　　3.直接在需要家事务的方法上面直接加注解(如果一个类里面所有方法都需要事务,那么直接加在类上面,如果是某个方法需要事务,那么就加在方法上,也可以在类和方法上都加注解,那么冲虚在执行的时候,优先选在方法上的注解,如果方法上没有注解,那么默认就用类上面的注解)

         类上面一般加:@Transactional(propagation = Propagation.REQUIRED, rollbackFor = Exception.class)

　　　　1.1在login上加注解

　　　@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)

           public User login(String username, String password)

　　　　1.2在regist上加注解

　　　　@Transactional(propagation = Propagation.REQUIRED, isolation = 　　　　　　　　　　　　Isolation.READ_COMMITTED, rollbackFor = Exception.class, timeout = 5000)
　　　　@Override
　　　　public void regist(UserVo userVo) {

 三.Spring整合MyBatis

　　1.基本用法

　　 　1.1.添加相应的jar

　　　　mybatis包和mybatis-spring(整合包,由mybatis提供):

　　　　pom.xml添加坐标

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yyp</groupId>
<artifactId>spring-web</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>spring-web Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- 整合mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!-- mybatis-spring整合jar包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>

<!-- 整合dbcp包 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<!-- druid德鲁伊连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.11</version>
</dependency>

<!-- 整合jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.18</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.3.21</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.27</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.6</version>
</dependency>
<!--整合spring-ioc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.3.20</version>
</dependency>

<!-- spring-aop的包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.20</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>
<!-- 整合java EE的包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>

<!-- 整合spring-web包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.21</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
<dependency>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.ow2.asm/asm -->
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>7.1</version>
</dependency>

</dependencies>
<build>
<finalName>spring-web</finalName>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.10.1</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M7</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>3.0.0-M1</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>3.0.0-M2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>4.0.0-M1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.3.0</version>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>
</project>

　　

　　2.创建Dao的实现类

　　　2.1对应MyBatis而言,可以创建Dao实现类,也不不创建,一般都不创建Dao的实现类

　　　DataSource---->SqlSession---->Dao--->Service--->Action

　　　　public class UserDaoMybatisImpl implements UserDao {
　　　　@Autowired
　　　　private SqlSessionFactory sessionFactory;

　　　　

　　　2.2配置SqlSessionFactory,spring.xml　　

　　　　1.需要配置数据源(druid)

　　　　2.需要配置注解驱动

　　　　3.需要配置SeqSessionFactory的bean(就是下面图片中用蓝色标出来的)

<?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:util="http://www.springframework.org/schema/util"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 配置扫描包 -->
<context:component-scan
base-package="com.yyp.service.impl"></context:component-scan>
<context:component-scan
base-package="com.yyp.dao.impl"></context:component-scan>
<!-- 工具类加到ioc容器宏 -->
<bean class="com.yyp.util.SpringBeanHolder" />
<!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
<!-- 读取数据库的属性配置文件dataSource.properties -->
<context:property-placeholder
location="classpath:dataSource.properties" />
<bean id="dataSource1"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 使用dbcp数据源,这个数据源有连接池的功能,效率会更高一些 -->
<bean id="dataSource2"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 德鲁伊连接池配置 -->
<bean id="dataSource"
class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="initialSize" value="5" />
<property name="maxActive" value="100" />
<property name="minIdle" value="3" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="5000" />
</bean>
<!-- 配置jdbcTemplate -->
<bean class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>

</bean>
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFatoryBean">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置事务管理器,相当于我们的环绕通知 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 下面是方式一,使用命名空间 -->
<!-- 通过注解方式配置事务,下面就不需要了 -->
<!-- 配置事务的属性 -->
<!-- 配置通知
<tx:advice id="txAdvice"
transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="login" propagation="SUPPORTS"
read-only="true" />

<tx:method name="regist" propagation="REQUIRED" isolation="READ_COMMITTED"

no-rollback-for="ava.lang.ArithmeticException"
timeout="5000" />
</tx:attributes>
</tx:advice>
<!-配置Pointcut并织入
<aop:config>
<aop:pointcut id="pc" expression="execution(* com.yyp.service.impl.*.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="pc"/>
</aop:config>
-->
<!-- 方式二,配置注解驱动 -->
<tx:annotation-driven transaction-manager="transcationManager"/>
</beans>

　　　　2.3

 

在类路径的Mapper里面创建映射文件:UserMapper.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.yyp.dao.UserDao">
    <sql id="user_column">
        id,
        username,
        password
    </sql>
    <select id="selectByUsername" parameterType="string"
        resultType="User">
        select
        <include refid="user_column" />
        from t_user
        where username=#{username}
    </select>
    <insert id="insert" parameterType="user" useGeneratedKeys="true">
        insert into t_user
            (username,password)
        values
            (#{username},#{password})

　　在pom.xml配置将UserMapper打包也打入

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yyp</groupId>
    <artifactId>spring-web</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-web Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <!-- 整合mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.6</version>
        </dependency>
        <!-- mybatis-spring整合jar包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>

        <!-- 整合dbcp包 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <!-- druid德鲁伊连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.11</version>
        </dependency>

        <!-- 整合jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.18</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.3.21</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.27</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.6</version>
        </dependency>
        <!--整合spring-ioc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.3.20</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.3.20</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.20</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.3.20</version>
        </dependency>

        <!-- spring-aop的包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.3.19</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.3.20</version>
        </dependency>
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>3.3.0</version>
        </dependency>
        <!-- 整合java EE的包 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>

        <!-- 整合spring-web包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.3.21</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
        <dependency>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.ow2.asm/asm -->
        <dependency>
            <groupId>org.ow2.asm</groupId>
            <artifactId>asm</artifactId>
            <version>7.1</version>
        </dependency>

    </dependencies>
    <build>
        <finalName>spring-web</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.2.0</version>
            </plugin>
            <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.2.0</version>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.10.1</version>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>3.0.0-M7</version>
            </plugin>
            <plugin>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.2.2</version>
            </plugin>
            <plugin>
                <artifactId>maven-install-plugin</artifactId>
                <version>3.0.0-M1</version>
            </plugin>
            <plugin>
                <artifactId>maven-deploy-plugin</artifactId>
                <version>3.0.0-M2</version>
            </plugin>
            <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
            <plugin>
                <artifactId>maven-site-plugin</artifactId>
                <version>4.0.0-M1</version>
            </plugin>
            <plugin>
                <artifactId>maven-project-info-reports-plugin</artifactId>
                <version>3.3.0</version>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/</path>
                    <port>8080</port>
                </configuration>
            </plugin>
        </plugins>
        <resources>
            <!-- 配置打包,这样Mapper下面的UserMapper.xml就会打包打入 -->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
</project>

 

3.在spring.xml指定映射文件UserMapper.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:util="http://www.springframework.org/schema/util"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!-- 配置扫描包 -->
    <context:component-scan
        base-package="com.yyp.service.impl"></context:component-scan>
    <context:component-scan
        base-package="com.yyp.dao.impl"></context:component-scan>
    <!-- 工具类加到ioc容器宏 -->
    <bean class="com.yyp.util.SpringBeanHolder" />
    <!-- 配置DataSource 采用spring内置的数据源,但是他没有连接池的功能 -->
    <!-- 读取数据库的属性配置文件dataSource.properties -->
    <context:property-placeholder
        location="classpath:dataSource.properties" />
    <bean id="dataSource1"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName"
            value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>
    <!-- 使用dbcp数据源,这个数据源有连接池的功能,效率会更高一些 -->
    <bean id="dataSource2"
        class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName"
            value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <property name="initialSize" value="5" />
        <property name="maxActive" value="100" />
        <property name="minIdle" value="3" />
        <property name="maxIdle" value="5" />
        <property name="maxWait" value="5000" />
    </bean>
    <!-- 德鲁伊连接池配置 -->
    <bean id="dataSource"
        class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName"
            value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <property name="initialSize" value="5" />
        <property name="maxActive" value="100" />
        <property name="minIdle" value="3" />
        <property name="maxIdle" value="5" />
        <property name="maxWait" value="5000" />
    </bean>
    <!-- 配置jdbcTemplate -->
    <bean class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>

    </bean>
    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory"
        class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!--指定映射文件的路径 -->
        <property name="mapperLocations"
            value="classpath:com/yyp/mapper/*.xml" />
        <!-- 为映射类指定别名 -->
        <property name="typeAliasesPackage" value="com.yyp.entity" />
    </bean>

    <!-- 配置事务管理器,相当于我们的环绕通知 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />

    </bean>
    <!-- 下面是方式一,使用命名空间 -->
    <!-- 通过注解方式配置事务,下面就不需要了 -->
    <!-- 配置事务的属性 -->
    <!-- 配置通知 <tx:advice id="txAdvice" transaction-manager="transactionManager"> 
        <tx:attributes> <tx:method name="login" propagation="SUPPORTS" read-only="true" 
        /> <tx:method name="regist" propagation="REQUIRED" isolation="READ_COMMITTED" 
        no-rollback-for="ava.lang.ArithmeticException" timeout="5000" /> </tx:attributes> 
        </tx:advice> <!-配置Pointcut并织入 <aop:config> <aop:pointcut id="pc" expression="execution(* 
        com.yyp.service.impl.*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="pc"/> 
        </aop:config> -->
    <!-- 方式二,配置注解驱动 -->
    <tx:annotation-driven
        transaction-manager="transcationManager" />
</beans>

4.增加日志log4j

　　补充:slf4j是一组日志接口,但并未提供任何实现,实际开发中整个系统中可能使用了不同的日志框架,推荐面向slf4j写日志代码,可以处理不同日志框架之间的差异

<!-- 增加日志 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.30</version>
</dependency>