transaction事务案例--银行转账

package cn.spring.transaction.dao;

public interface MoneyDao {
    //加钱的方法
    void addMoney(double money);
    //减钱的方法
    void subMoney(double money);
}

package cn.spring.transaction.dao.impl;

import cn.spring.transaction.dao.MoneyDao;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

public class MoneyDaoImpl extends JdbcDaoSupport implements MoneyDao {
    JdbcTemplate jdbcTemplate=this.getJdbcTemplate();
    @Override
    public void addMoney(double money) {
        String sql="update accounts set balance=balance+? where accountname=‘小明‘";
        this.getJdbcTemplate().update(sql,money);
    }

    @Override
    public void subMoney(double money) {
        String sql="update accounts set balance=balance-? where accountname=‘小李‘";
        this.getJdbcTemplate().update(sql,money);
    }
}

package cn.spring.transaction.service;

public interface MoneyService {
    //转账的方法
    void transferMoney(double money);
}

package cn.spring.transaction.service.impl;

import cn.spring.transaction.dao.MoneyDao;
import cn.spring.transaction.service.MoneyService;

public class MoneyServiceImpl implements MoneyService {
    MoneyDao moneyDao;
    @Override
    public void transferMoney(double money) {

        //金额先减后加
        moneyDao.subMoney(money);
        moneyDao.addMoney(money);
    }

    public MoneyDao getMoneyDao() {
        return moneyDao;
    }

    public void setMoneyDao(MoneyDao moneyDao) {
        this.moneyDao = moneyDao;
    }
}

<?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:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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">

    <!--1.配置数据源   spring内置的数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--2.引入属性文件-->
    <context:property-placeholder location="jdbc.properties"></context:property-placeholder>

    <!--3.构建jdbcTemplate-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--4.dao-->
    <bean id="moneyDaoImpl" class="cn.spring.transaction.dao.impl.MoneyDaoImpl">
        <!--为jdbcTemplate配置数据源-->
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>

    <!--5.service-->
    <bean id="moneyServiceImpl" class="cn.spring.transaction.service.impl.MoneyServiceImpl">
        <property name="moneyDao" ref="moneyDaoImpl"></property>
    </bean>

    <!--扫描注解：包扫描器-->
    <context:component-scan base-package="cn.spring"></context:component-scan>

    <!--开启AOP注解支持-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

package cn.spring;

import cn.spring.transaction.service.MoneyService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TransactionTest {
    public static void main(String[] args) {
        ApplicationContext context=new ClassPathXmlApplicationContext("app01.xml");
        MoneyService moneyService = context.getBean(MoneyService.class);
        //实现转账
        moneyService.transferMoney(1000);
    }
}