spring_Transactions注解实现

（1）前期准备

https://blog.csdn.net/weixin_45460315/article/details/105176089

（2）修改application.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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:centext="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.2.xsd
		http://www.springframework.org/schema/aop
		http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
		http://www.springframework.org/schema/tx
		http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">
		<!-- 加入扫描 -->
		<centext:component-scan base-package="com.linxin.spring.dao"></centext:component-scan>
		<centext:component-scan base-package="com.linxin.spring.service"></centext:component-scan>
		<!-- 加载文件 -->
		<centext:property-placeholder location="classpath:db.properties"/>
		
		<!-- spring管理c3p0数据源 -->
		<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
			<property name="driverClass" value="${jdbc.driver}"></property>
			<property name="jdbcUrl" value="${jdbc.url}"></property>
			<property name="user" value="${jdbc.username}"></property>
			<property name="password" value="${jdbc.password}"></property>
		</bean>
		<!-- Jdbctemplate -->
		<bean name="jdbctemplate" class="org.springframework.jdbc.core.JdbcTemplate">
			<property name="dataSource" ref="dataSource"></property>
		</bean>
		<!-- 事务管理 -->
		<bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
			<!-- 数据源 -->
			<property name="dataSource" ref="dataSource"></property>
		</bean>
		<!-- 开启注解事务管理 -->
		<tx:annotation-driven/>
		
</beans>

（3）修改serice下的实现类

package com.linxin.spring.service;

import javax.annotation.Resource;

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

import com.linxin.spring.dao.AccountDao;

@Service("accountService")
public class AccountServiceImpl implements AccountService {
	@Resource(name="accountDao")
	private AccountDao accountDao;
	@Override
	@Transactional(propagation = Propagation.REQUIRED,readOnly = false,isolation = Isolation.READ_COMMITTED)
	public void transfer(Integer from, Integer to, Double money) {
		accountDao.addMoney(to, money);
		int a=1/0;
		accountDao.subMoney(from, money);
	}

}

（4）完成其余不变