Spring的事务管理

1 <!-- 配置事务管理器 -->
2     <bean id = "transactionManager" 
3     class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
4         <property name="dataSource" ref = "dataSource"></property>
5     </bean>
6     <!-- 启用事物注解 -->
7     <tx:annotation-driven transaction-manager="transactionManager"/>

 1 package com.SpringTransaction;
 2  
 3 import org.junit.rules.Timeout;
 4 import org.springframework.beans.factory.annotation.Autowired;
 5 import org.springframework.stereotype.Service;
 6 import org.springframework.transaction.annotation.Isolation;
 7 import org.springframework.transaction.annotation.Propagation;
 8 import org.springframework.transaction.annotation.Transactional;
 9  
10 @Service("BookShopService")
11 public class BookShopServiceImpl implements BookShopService {
12     @Autowired
13     private BookShopDao bookShopDao;
14     /*
15      *添加事务注解（@Transactional）
16      *1.使用 propagation 指定事务的传播行为, 即当前的事务方法被另外一个事务方法调用时
17      *如何使用事务, 默认取值为 REQUIRED, 即使用调用方法的事务
18      *2.使用isolation来确定事务的隔离级别，最常用的取值为READ_COMMITTED
19      *3.noRollbackFor，通常情况下spring的声明式事物会对所有运行时的异常进行回滚，也可以通过noRollbackFor来
20      *设置不需要回滚的异常。通常情况下使用默认值就行了。
21      *    @Transactional(propagation = Propagation.REQUIRED,
22      *    isolation=Isolation.READ_COMMITTED,
23      *    RollbackFor={UserAccountException.class})
24      *4.readOnly：使用readOnly可以指定事务是否只读，若为true表示只读，
25      *这样可以帮助数据库引擎优化事务. 若真的事一个只读取数据库值的方法, 应设置 readOnly=true
26      *5.timeout指定强制回滚之前事务可以占用的时间. 防止一个访问长时间占用 
27      * */
28     @Transactional(propagation = Propagation.REQUIRED,
29             isolation=Isolation.READ_COMMITTED,
30             readOnly = false,
31             timeout=3)
32     public void purchase(String username, int bookid) {
33         //1.获取书的单价
34         int price = bookShopDao.findBookPriceByBookId(bookid);
35         //2.更新书的库存
36         bookShopDao.updateBookStock(bookid);
37         //3.更新用户余额
38         bookShopDao.updateUserAccount(username, price);
39     }
40 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xmlns:aop="http://www.springframework.org/schema/aop"
 7     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 8         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
 9         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
10         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
11     
12     <!-- 扫描路径 -->
13     <context:component-scan base-package="com"></context:component-scan>
14     <!-- 导入资源文件-->
15     <context:property-placeholder location="classpath:db.properties"/>
16     <!-- 配置c3p0数据源 -->
17     <bean id="dataSource" 
18     class="com.mchange.v2.c3p0.ComboPooledDataSource">
19         <property name="user" value="${jdbc.user}"></property>
20         <property name="password" value="${jdbc.password}"></property>
21         <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
22         <property name="driverClass" value="${jdbc.driverClass}"></property>
23         <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
24         <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
25     </bean>
26     <!-- 配置JdbcTemplate -->
27     <bean id="jdbcTemplate" 
28     class="org.springframework.jdbc.core.JdbcTemplate">
29         <property name="dataSource" ref="dataSource"></property>
30     </bean>
31     <bean id = "bookShopDao" class="com.SpringTransaction.xml.BookShopDaoImpl">
32         <property name="jdbcTemplate" ref="jdbcTemplate"></property>
33     </bean>
34     <bean id = "bookShopService" class="com.SpringTransaction.xml.service.impl.BookShopServiceImpl">
35         <property name="bookShopDao" ref = "bookShopDao"></property>
36     </bean>
37     <bean id = "cashier" class="com.SpringTransaction.xml.service.impl.CashierImpl">
38         <property name="bookShopService" ref="bookShopService"></property>
39         
40     <!-- 1.配置事务管理器 -->
41     </bean>
42     <bean id = "transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
43         <property name="dataSource" ref="dataSource"></property>
44     </bean>
45     <!-- 2.配置事务属性 -->
46     <tx:advice id = "txAdvice" transaction-manager="transactionManager">
47         <tx:attributes>
48             <!-- 根据方法名指定事务的属性 -->
49             <tx:method name="*"/>
50         </tx:attributes>
51     </tx:advice>
52     <!-- 3.配置事务切入点，以及把切入点和事务属性关联起来 -->
53     <aop:config>
54         <aop:pointcut expression="execution(* com.SpringTransaction.xml.service.*.*(..))" 
55         id="txPointCut"/>
56         <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
57     </aop:config>
58 </beans>