浅谈Spring中@Transactional事务回滚及示例（附源码）

<bean id="appTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <property name="dataSource" ref="dataSource" />
  </bean>

  <tx:annotation-driven proxy-target-class="false" transaction-manager="appTransactionManager" />

<?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:tx="http://www.springframework.org/schema/tx"
  xmlns:aop="http://www.springframework.org/schema/aop"
  xsi:schemaLocation=" 
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
      http://www.springframework.org/schema/beans 
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
      http://www.springframework.org/schema/aop 
      http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context-3.0.xsd">

   <!-- 引入jdbc配置文件 --> 
   <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
      <list>
        <value>classpath:properties/*.properties</value>
        <!--要是有多个配置文件，只需在这里继续添加即可 -->
      </list>
    </property>
  </bean>

  <!-- 配置数据源 -->
  <bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <!-- 不使用properties来配置 -->
    <!-- <property name="driverClassName" value="com.mysql.jdbc.Driver" /> 
      <property name="url" value="jdbc:mysql://localhost:3306/learning" /> 
      <property name="username" value="root" /> 
      <property name="password" value="christmas258@" /> -->
    <!-- 使用properties来配置 -->
    <property name="driverClassName">
      <value>${jdbc_driverClassName}</value>
    </property>
    <property name="url">
      <value>${jdbc_url}</value>
    </property>
    <property name="username">
      <value>${jdbc_username}</value>
    </property>
    <property name="password">
      <value>${jdbc_password}</value>
    </property>
  </bean>

  <bean id="appTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <property name="dataSource" ref="dataSource" />
  </bean>

  <tx:annotation-driven proxy-target-class="false" transaction-manager="appTransactionManager" />
  <!-- 自动扫描了所有的XxxxMapper.xml对应的mapper接口文件，这样就不用一个一个手动配置Mpper的映射了，只要Mapper接口类和Mapper映射文件对应起来就可以了。 -->
  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage"
      value="com.luo.dao" />
  </bean>

  <!-- 配置Mybatis的文件 ，mapperLocations配置**Mapper.xml文件位置，configLocation配置mybatis-config文件位置-->
  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="mapperLocations" value="classpath:mapper/*.xml"/> 
    <property name="configLocation" value="classpath:mybatis/mybatis-config.xml" />
    <!-- <property name="typeAliasesPackage" value="com.tiantian.ckeditor.model" 
      /> -->
  </bean>

  <!-- 自动扫描注解的bean -->
  <context:component-scan base-package="com.luo.service" />
</beans>

@Transactional(propagation=Propagation.REQUIRED)
public void addUser(User user) {
  userDao.addUser(user);
  String string = null;
  if(string.equals("")) {
    int i = 0;
  }
}

@Test 
public void addUserTest(){ 
  User user = new User();
  user.setUserName("luoguohui1");
  user.setUserPassword("luoguohui1");
  userService.addUser(user);
} 

@Transactional(propagation=Propagation.NOT_SUPPORTED)