使用注解实现声明式事务处理

在上次使用xml配置声明式事务的基础上继续改造

xml配置声明式事务链接：https://blog.youkuaiyun.com/qq_41172416/article/details/82285160

 此处省略部分代码 . . . . . . 

 applicationContext.xml文件

注意：我注释了上次使用xml声明事务的代码

<?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.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
	<!-- 配置数据源 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url"
			value="jdbc:mysql://127.0.0.1:3306/smbms?useUnicode=true&amp;characterEncoding=utf-8" />
		<property name="username" value="root" />
		<property name="password" value="root" />
	</bean>
	<!-- 获得sqlSessionFactory -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 映射数据源 -->
		<property name="dataSource" ref="dataSource" />
		<!-- 映射mybatis核心配置文件 -->
		<property name="configLocation" value="classpath:mybatis-config.xml" />
		<!-- 映射mapper文件 -->
		<property name="mapperLocations">
			<list>
				<value>classpath:com/bdqn/dao/**/*.xml</value>
			</list>
		</property>
	</bean>
	<!--使用(MapperScannerConfigurer)创建的所有映射器实现都会被自动注入sqlSessionFactory实例 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 配置了多个sqlSessionFactory时，需要指定所依赖的sqlSessionFactory实例 -->
		<property name="basePackage" value="com.bdqn.dao" />
	</bean>
	<!--配置扫描注解定义的业务 Bean -->
	<context:component-scan base-package="com.bdqn.service" />

	<!-- 定义事务管理器 -->
	<bean id="txManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>
			<!--通过<tx:advice>标签为指定的事务管理器设置事务属性 -->
			<!-- <tx:advice id="txAdvice" transaction-manager="txManager">
				定义属性,声明事务规则
				<tx:attributes>
					<tx:method name="*" propagation="REQUIRED" isolation="DEFAULT" timeout="-1" read-only="false" rollback-for="" no-rollback-for=""/>
				</tx:attributes>
			</tx:advice> -->
			<!-- 定义切面 -->
			<!-- <aop:config>
				定义切入点
				<aop:pointcut id="serviceMethod" expression="execution(* com.bdqn.service..*.*(..))" />
				将事务增强与切入点组合
				<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" />
			</aop:config> -->
	 <!--  使用注解实现声明式事务 -->
	 <tx:annotation-driven transaction-manager="txManager"/>
</beans>


  

 service层

注意：我在此类中添加了一个public void addUser(List<User> users)方法并且抛出了异常，如果出现异常则添加失败，否则，添加成功。

package com.bdqn.service.user;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.bdqn.dao.user.UserMapper;
import com.bdqn.pojo.User;

@Transactional
@Service("userService")
public class UserServiceImpl implements UserService {

	@Resource
	private UserMapper userMapper;

	@Override
	@Transactional(propagation=Propagation.SUPPORTS)
	public List<User> findUserList(User user) throws Exception {
		try {
			return userMapper.getUsers(user);
		} catch (Exception e) {
			e.printStackTrace();
			throw e;
		}
	}

	@Override
	public int addUser(User user) {
		return userMapper.addUser(user);
	}

	@Override
	public void addUser(List<User> users) {
		for (User u: users) {
			addUser(u);
			int i=2/0;
		}
	}

}