spring--事务控制（银行转账案例）

1.导入相关包

或许有些包用不着，但为了方便，直接全部导入

2.定义一个转账方法的接口

3.创建一个类实现转账方法

这里继承了JdbcDaoSupport类，直接使用getJdbcTemplate()来获取数据库的连接

4.定义Service层接口来获得转出对象，转入对象，转入金额

5.实现service接口

package cn.lpp.service;
import javax.annotation.Resource;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate;
import cn.lpp.dao.Account;
public class AccountServiceImp implements AccountService{
    private Account  at;
	private TransactionTemplate tt;
	public void setAt(Account at) {
		this.at = at;
	}
	public void setTt(TransactionTemplate tt) {
		this.tt = tt;
	}
	@Override
	public void transfer(Integer from, Integer to, Double money) {
		// TODO Auto-generated method stub
		//开启事务
	    tt.execute(new TransactionCallbackWithoutResult() {
			
			@Override
			protected void doInTransactionWithoutResult(TransactionStatus arg0) {
				//减钱
				at.decreaseMoney(from, money);
				//加钱
				at.addMoney(to, money);
				
			}
		});
	}
}

6.配置xml文件

7.配置db.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.user=root
jdbc.password=1234

8.demo测试

package cn.lpp.test;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import cn.lpp.dao.Account;
import cn.lpp.service.AccountService;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class demo {
	@Resource(name="accountService")
	private AccountService as;
@Test
public void fun1(){
as.transfer(1, 2, 100d);
	
}
}

9.demo前

demo后