Spring声明式事务管理的多种方式

左手的ㄟ右手 2022-10-01 00:48 224阅读 0赞

spring的声明式事务管理比编程式事务管理灵活太多了，代码的污染性低，  
第一种方式：传统方式，通过代理类来增强目标类实现事务管理。（这种方式的弊端：每个类都要进行代理增强，适合服务层少的项目，对于中大型的项目并不能适用，总不能每个服务层都要代理吧）  
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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd">
    
    
    
        
        <context:property-placeholder location="classpath:jdbc.properties" />
        
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${jdbc.driver}"/>
            <property name="jdbcUrl" value="${jdbc.url}"/>
            <property name="user" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
        </bean>
        
        <bean id="accountService" class="com.spring.demo1.AccountServiceImpl">
            <property name="accountDao" ref="accountDao"/>
        </bean>
    
        <bean id="accountDao" class="com.spring.demo1.AccountDaoImpl">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        
        <bean id="accountServiceProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
            
            <property name="target" ref="accountService"/>
            
            <property name="transactionManager" ref="transactionManager"/>
            
            <property name="transactionAttributes">
                <props>
                    
                    <prop key="transfer">PROPAGATION_REQUIRED,ISOLATION_SERIALIZABLE,-Exception</prop>
                    <prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
                </props>
            </property>
        </bean>
    
    </beans>

测试代码：注意点，因为是通过代理来增强目标类的方式来进行事务管理的，所以在注入的时候要使用增强的代理类，而不是原类。

package com.spring.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;
    
    /** * * 转账案例的测试类 * @author Administrator * */
    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration("classpath:applicationContext.xml")
    public class springDemo1 { 
    
    
        /** * 注入代理类：因为代理类进行了增强的操作。 */
    // @Resource(name="accountService")
        @Resource(name="accountServiceProxy")
        private AccountService accountService;
    
        @Test
        public void test(){
        accountService.transfer("bbb", "aaa", 200d);    
        }
    
    }

第二种方式：基于aspectj的xml方式配置：（这种方式是属于自动代理，不需要再注入增强代理类了）  
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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd">
    
        
        <context:property-placeholder location="classpath:jdbc.properties" />
        
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${jdbc.driver}" />
            <property name="jdbcUrl" value="${jdbc.url}" />
            <property name="user" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
        </bean>
        
        <bean id="accountService" class="com.spring.demo1.AccountServiceImpl">
            <property name="accountDao" ref="accountDao" />
        </bean>
    
        <bean id="accountDao" class="com.spring.demo1.AccountDaoImpl">
            <property name="dataSource" ref="dataSource" />
        </bean>
    
        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            <tx:attributes>
            
                <tx:method name="transfer" propagation="REQUIRED" isolation="DEFAULT" read-only="false" timeout="-1" rollback-for="Exception"/>
            </tx:attributes>
        </tx:advice>
    
        
        <aop:config>
            
            <aop:pointcut expression="execution(* com.spring.demo1.AccountService+.*(..))" id="pointcut1"/>
            
            <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut1"/>
        </aop:config>   
    
    </beans>