Spring笔记整理5（事务处理）

主要是讲spring的事务
Dao层接口

public interface AccountDao {
    
    
	//加钱方法
	void increaseMoney(Integer id,Double money);
	//减钱方法
	void decreaseMoney(Integer id,Double money);
}

Dao层实现类
主要是继承了JdbcDaoSupport和实现了Dao的接口

public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {
    
    


	public void increaseMoney(Integer id, Double money) {
    
    
		getJdbcTemplate().update("update t_account set money = money+? where id=?", money,id);
	}
	public void decreaseMoney(Integer id, Double money) {
    
    
		getJdbcTemplate().update("update t_account set money = money-? where id=?", money,id);

	}

}

Service层接口

public interface AccountService {
    
    
	
	//转账方法
	void transfer(Integer from,Integer to,Double money);
}

Service层实现类
通过set注入

转账的小demo
还有个demo2，加载的配置文件不一样，配置文件主要是配置事务管理器，模板对象，但一个文件是配置事务通知相关的，一个是用aop注解管理事务

public class AccountServiceImpl implements AccountService {
    
    
	
	private AccountDao  ad;
	private TransactionTemplate tt;
	
	public void transfer(final Integer from,final Integer to,final Double money) {
    
    
		
		
				//减钱
				ad.decreaseMoney(from, money);
				//int i=1/0;
				//加钱
				ad.increaseMoney(to, money);
				
			}
	public void setAd(AccountDao ad) {
    
    
		this.ad = ad;
	}
	public void setTt(TransactionTemplate tt) {
    
    
		this.tt = tt;
	}
	
	
}

@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);
}
}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">

<!-- 指定spring读取db.properties -->
<context:property-placeholder location="classpath:db.properties"/>

<!-- 事务核心管理器，封装了所有的事务操作，依赖于连接池 -->
<bean  name="transactionManager"  class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
	<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 事务模板对象 -->
<bean  name="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
	<property name="transactionManager" ref="transactionManager"></property>
</bean>

<!-- 配置事务通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
	<tx:attributes>
	<!-- 以方法为单位，指定方法应用什么事务属性
		isolation隔离级别
		propagation传播行为
		read-only是否只读
	 -->
		<tx:method name="save*"  isolation="REPEATABLE_READ" propagation="REQUIRED"  read-only="false"/>
		<tx:method name="get*"  isolation="REPEATABLE_READ" propagation="REQUIRED"  read-only="true"/>
		<tx:method name="find*"  isolation="REPEATABLE_READ" propagation="REQUIRED"  read-only="true"/>
		<tx:method name="transfer"  isolation="REPEATABLE_READ" propagation="REQUIRED"  read-only="false"/>
	</tx:attributes>
</tx:advice>

<!-- 配置织入 -->
<aop:config>
	<!-- 配置切点表达式 -->
	<aop:pointcut expression="execution(* cn.itheima.service.*ServiceImpl.*(..))" id="txPc"/>
	<!-- 配置切面 
		advice-ref通知的名称
		pointcut-ref切点的名称
	-->
	<aop:advisor advice-ref="txAdvice"  pointcut-ref="txPc"/>
</aop:config>


<!-- 1、将连接池放入spring容器 -->
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
	<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
	<property name="driverClass" value="${jdbc.driverClass}"></property>
	<property name="user" value="${jdbc.user}"></property>
	<property name="password" value="${jdbc.password}"></property>
</bean>

<!-- 2、将Dao放入spring容器 -->
<bean name="accountDao" class="cn.itheima.dao.AccountDaoImpl">
	<!-- <property name="jt" ref="jdbcTemplate"></property> -->
	<property name="dataSource"  ref="dataSource"></property>
</bean>

<!-- 3service -->
<bean  name="accountService" class="cn.itheima.service.AccountServiceImpl">
	<property name="ad" ref="accountDao"></property>
	<property name="tt" ref="transactionTemplate"></property>
</bean>
</beans>

applicationContext2.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">

<!-- 指定spring读取db.properties -->
<context:property-placeholder location="classpath:db.properties"/>

<!-- 事务核心管理器，封装了所有的事务操作，依赖于连接池 -->
<bean  name="transactionManager"  class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
	<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 事务模板对象 -->
<bean  name="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
	<property name="transactionManager" ref="transactionManager"></property>
</bean>

<!-- 开启使用注解管理aop事务 -->
<tx:annotation-driven/>

<!-- 1、将连接池放入spring容器 -->
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
	<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
	<property name="driverClass" value="${jdbc.driverClass}"></property>
	<property name="user" value="${jdbc.user}"></property>
	<property name="password" value="${jdbc.password}"></property>
</bean>

<!-- 2、将Dao放入spring容器 -->
<bean name="accountDao" class="cn.itheima.dao.AccountDaoImpl">
	<!-- <property name="jt" ref="jdbcTemplate"></property> -->
	<property name="dataSource"  ref="dataSource"></property>
</bean>

<!-- 3service -->
<bean  name="accountService" class="cn.itheima.service.AccountServiceImpl">
	<property name="ad" ref="accountDao"></property>
	<property name="tt" ref="transactionTemplate"></property>
</bean>
</beans>