1. 说明:Spring为了简化事务管理的代码:提供了模板类 TransactionTemplate,所以手动编程的方式来管理事务,只需要使用该模板类即可!!
2.手动编程方式的具体步骤如下:
  1.步骤一:创建WEB工程,引入需要的jar包
      * IOC的6个包
  * AOP的4个包
  * C3P0的1个包
   * MySQL的驱动包
  * JDBC目标2个包
  * 整合JUnit测试包

  2.步骤二:创建数据库的表结构
      create database spring_day03;
  use spring_day03;
  create table t_account(
  id int primary key auto_increment,
  name varchar(20),
  money double
  );
  3.步骤三:引入配置文件
      * 引入配置文件
   * 引入log4j.properties
  4. 步骤四:引入applicationContext.xml
    * 基本配置为:
<?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:jdbc="http://www.springframework.org/schema/jdbc" xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd"> </beans> 
    * 使用C3P0连接池
     * 先引入C3P0的jar包
    * com.springsource.com.mchange.v2.c3p0-0.9.1.2.jar      * 编写配置文件
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
     <property name="driverClass" value="com.mysql.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql:///spring-day03"/>
    <property name="user" value="root"/>
    <property name="password" value="root"/>
     </bean>
  5.步骤三:创建对应的包结构和类(具体内容,见“https://www.cnblogs.com/wyhluckdog/p/10137283.html”这篇博文)
      * com.huida.demo1
  * AccountService
  * AccountServlceImpl
  * AccountDao
   * AccountDaoImpl 
  6.步骤五:引入Spring的配置文件,将类配置到Spring中
<bean id="accountDao" class="com.huida.demo1.AccountDaoImpl">
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="accountService" class="com.huida.demo1.AccountServiceImpl">
<property name="accountDao" ref="accountDao"/>
</bean>
  7.步骤六:配置一个事务管理器,Spring使用PlatformTransactionManager接口来管理事务,所以咱们需要使用到他的实现类!!
        <!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
  8.步骤七:配置事务管理的模板
        <!-- 配置事务管理的模板 -->
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager"/>
</bean>
  9.步骤八:在需要进行事务管理的类中,注入事务管理的模板.
        <bean id="accountService" class="com.huida.demo1.AccountServiceImpl">
<property name="accountDao" ref="accountDao"/>
<property name="transactionTemplate" ref="transactionTemplate"/>
</bean>
  10.完整的配置文件配置信息为:
<?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:jdbc="http://www.springframework.org/schema/jdbc" xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd"> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql:///spring-day03"/>
<property name="user" value="root"/>
<property name="password" value="root"/>
</bean> <!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置事务管理的模板 -->
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager"/>
</bean>
<bean id="accountDao" class="com.huida.demo1.AccountDaoImpl">
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="accountService" class="com.huida.demo1.AccountServiceImpl">
<property name="accountDao" ref="accountDao"/>
<property name="transactionTemplate" ref="transactionTemplate"/>
</bean> </beans>
  11.步骤九:在业务层使用模板管理事务:
package com.huida.demo1;

import javax.annotation.Resource;

import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate; public class AccountServiceImpl implements AccountService{ @Resource(name="accountDao")
private AccountDaoImpl accountDao; public void setAccountDao(AccountDaoImpl accountDao) {
this.accountDao = accountDao;
}
// 注入事务模板对象
@Resource(name="transactionTemplate")
private TransactionTemplate transactionTemplate;
public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
this.transactionTemplate = transactionTemplate;
} public void pay(final String out, final String in, final double money) {
transactionTemplate.execute(new TransactionCallbackWithoutResult() { protected void doInTransactionWithoutResult(TransactionStatus status) {
// 扣钱
accountDao.outMoney(out, money);
// int a = 10/0;
// 加钱
accountDao.inMoney(in, money);
}
});
} }
  12.测试代码为:
package com.huida.demo1;

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; @RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext3.xml")
public class Demo1 { @Resource(name="accountService")
private AccountService accountService; @Test
public void run1(){
accountService.pay("小明","小红",1000);
}
}
  13.单元测试run1方法,刷新spring-day03数据库中的user表,发现小明的钱减少了1000,小红的钱增加了1000.

  
04-25 06:33