2018.5.26
1、创建项目
spring-05

2.导入包

3、日志文件
4、创建数据库表

5.创建accountDao
package com.lu.spring.dao; import javax.annotation.Resource; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository; @Repository("accountDao") public class AccountDaoImpl implements AccountDao { @Resource(name="jdbcTemplate") private JdbcTemplate jt;//private 不走set方法 走反射。 /** *转账汇钱 */ @Override public void addMoney(Integer id, Double money) { String sql = "update lu_account set money = money + ? where id = ?"; jt.update(sql,money,id); } @Override public void subMoney(Integer id, Double money) { String sql = "update lu_account set money = money - ? where id = ?"; jt.update(sql,money,id); } } |
6、创建service
package com.lu.spring.service; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.lu.spring.dao.AccountDao; @Service("accountService") public class AccountServiceImpl implements AccountService { @Resource(name="accountDao") private AccountDao accountDao; @Override public void transfer(Integer from, Integer to, Double money) { accountDao.subMoney(from, money); //int a= 9/0; 无事务的用例 报异常之后只有from减钱,to不加钱。 accountDao.addMoney(to, money); } } |
7、创建spring的配置文件
<?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: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/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd" > <!-- spring容器来完成对象的创建 --> <!-- 注解扫描 --> <context:component-scan base-package="com.lu.spring.dao"></context:component-scan> <context:component-scan base-package="com.lu.spring.service"></context:component-scan> <!-- 加载db.properties --> <context:property-placeholder location="classpath:db.properties"/> <!-- 连接池 直接使用${xxx}引用db配置--> <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${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> <!-- UserDao class为userDao的实现类impl!! <bean name="userDao" class="com.lu.spring.dao.UserDaoImpl"> <property name="jt" ref="jdbcTemplate"></property> </bean> --></beans> |
8、无事务测试用例
package com.lu.spring.service; 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; /** * 测试环境的搭建 * @author bitware13 * */ @RunWith(SpringJUnit4ClassRunner.class)//创建容器 @ContextConfiguration("classpath:applicationContext.xml") public class TxTest { @Resource(name="accountService") private AccountService accountService; /** * 1->2转账 */ @Test public void testTransfer() { accountService.transfer(1, 2, 1000D);//如果不带小数点 要加上D 说明是DOUBLE类型 } } |
9.测试异常中转账无法执行