Struts2、Mybatis、Spring整合

1、工程结构

2、web.xml配置

<!-- 配置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>
	
	<!-- Struts的配置 -->
	<filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

3、struts.xml配置

<struts>

    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/aaa" extends="struts-default">
    	<!-- class要写Spring配置文件里的类名，不要写真实的类名 -->
       <action name="list" class="userAction">
       		<result>/list.jsp</result>
       </action>
    </package>

    <include file="example.xml"/>
</struts>

4、db.properties配置

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis
jdbc.username=root
jdbc.password=mysqladmin

5、log4j.properties配置

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# MyBatis logging configuration...
log4j.logger.org.mybatis.example.BlogMapper=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

6、SqlMapperConfig.xml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>

	<!-- 上面的配置全部交给Spring管理，此处不用配置 -->
	<mappers>
		<package name="cn.sxt.vo"/>
	</mappers>
</configuration>

7、applicationContext.xml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/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd
            http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-4.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
           
    <!-- 加载配置文件 -->  
    <context:property-placeholder location="classpath:db.properties"/>
    <!-- 配置数据源 ,数据库链接信息-->
   <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   		<property name="driverClassName" value="${jdbc.driver}"/>
   		<property name="url" value="${jdbc.url}"/>
   		<property name="username" value="${jdbc.username}"/>
   		<property name="password" value="${jdbc.password}"/>
   </bean>  
    <!-- 声明式事务配置 开始 -->
	<!-- 配置事务管理器 -->
	<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
	    <property name="dataSource" ref="dataSource"/>
	</bean>
	
	<!-- 配置事务通知 -->
	<tx:advice id="txAdvice" transaction-manager="txManager">
		<tx:attributes>
			<!-- 配置哪些方法使用什么样的事务,配置事务的传播特性 -->
			<tx:method name="insert" propagation="REQUIRED"/>	
			<tx:method name="get" read-only="true"/>
			<tx:method name="*" propagation="REQUIRED" rollback-for="Throwable"/>
		</tx:attributes>
	</tx:advice>
	<aop:config>
		<aop:pointcut expression="execution(* cn.sxt.service.impl.*.*(..))" id="pointcut"/>
		<aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
	</aop:config>
	<!-- 声明式事务配置 结束 -->
	
    <!-- 配置SqlSessionFactory,目的是的到SqlSessionFactory对象-->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<!-- 加载SqlMapConfig.xml配置文件 -->
		<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
	</bean>
	
	<import resource="config/spring/user.xml"/>
  
</beans>

8、user.xml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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-4.0.xsd">
           
   <!-- UserDaoImpl接口继承了SqlSessionDaoSupport，所以要注入sqlSessionFactory --> 
   <bean id="UserDao" class="cn.sxt.dao.impl.UserDaoImpl">
   		<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
   </bean>
   <bean id="UserService" class="cn.sxt.service.impl.UserServiceImpl">
   		<property name="userDao" ref="UserDao"></property>
   </bean>
   <!-- 生成Action的对象，不能使用单例子 -->
  <bean id="userAction" class="cn.sxt.action.UserAction" scope="prototype">
  		<property name="userService" ref="UserService"></property>
  </bean>
</beans>

9、UserDaoImpl.java

package cn.sxt.dao.impl;

//实现SqlSessionDaoSupport类，注入sqlSessionFactory
public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {

	@Override
	public List<User> getAll() throws Exception {
		SqlSession sqlSession = this.getSqlSession();//注入sqlSessionFactory，通过this得到
		UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
		List<User> list = userMapper.getAll();
		return list;
	}
}

本例主要是ssm的配置，其余的java代码，dao层，service层，Action，pojo很简单，不在此一一列出