3.propagation="REQUIRED"和PROPAGATION="REQUIRES_NEW"的区别 （官方）PROPAGATION_REQUIRED--支持当前事务，如果当前没有事务，就新建一个事务。这是最常见的选择。 PROPAGATION_REQUIRES_NEW--新建事务，如果当前存在事务，把当前事务挂起。 马克-to-win：当两个不同的pointcut之间涉及调用方法时，就涉及到事务传播属性。比如上面的方法updateRegister，如果它的属性是PROPAGATION_REQUIRED，则它会和调用它的方法login同属一个事务，如果是REQUIRES_NEW，则在不同的事务。当updateRegister已经提交之后updateRegisterWrong发生错误的时候，如果是REQUIRES_NEW，则updateRegister不会回滚，而如果是REQUIRED，则会回滚。注意下例，我们把两个方法故意放在两个pointcut里。看一下程序把REQUIRED变成REQUIRES_NEW以后的区别。 例 2.3.1 package service; import java.sql.Types; import javax.annotation.Resource; import org.springframework.jdbc.core.JdbcTemplate; import com.INiutDAO; import service.interfac.ILoginService; public class LoginServiceImpl implements ILoginService { @Resource private JdbcTemplate jt; private INiutDAO iNiutDAO; public void setINiutDAO(INiutDAO iNiutDAO) { this.iNiutDAO = iNiutDAO; } public void login() { iNiutDAO.daoUpdateRegister(13,1); System.out.println("successfully update 1"); updateRegisterWrong(19,2); System.out.println("successfully update 2"); } public void updateRegisterWrong(int age,int id) { String sql = "UPDATE register SET age=? WWWWWWW id=?"; Object params[] = new Object[] { new Integer(age), new Integer(id) }; int type[] = new int[] { Types.INTEGER , Types.INTEGER }; jt.update(sql, params, type); } } <?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd" > <context:component-scan base-package="com" /> <context:component-scan base-package="service" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/" /> <property name="suffix" value=".jsp" /> </bean> <bean id="NiutDAO" class="com.NiutDAO"> </bean> <bean id="loginService" class="service.LoginServiceImpl" > <property name="iNiutDAO"> <ref bean="NiutDAO" /> </property> </bean> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="login*" propagation="REQUIRED" /> <tx:method name="daoUpdateRegister" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <!-- 配置切面 这种写法也正确"execution(* service.*.*(..))"--> <aop:config> <aop:pointcut id="myPointcut" expression="execution(* service.LoginServiceImpl.*(..))" /> <aop:pointcut id="myDaoPointcut" expression="execution(* com.NiutDAO.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="myPointcut"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="myDaoPointcut"/> </aop:config> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" > <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> <property name="url" value="jdbc:mysql://localhost:3306/test"></property> <property name="username" value="root"></property> <property name="password" value="1234"></property> </bean> <bean id="jt" class="org.springframework.jdbc.core.JdbcTemplate"> <constructor-arg ref="dataSource" /> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> </beans> package com; import java.sql.Types; import javax.annotation.Resource; import org.springframework.jdbc.core.JdbcTemplate; public class NiutDAO implements INiutDAO { @Resource private JdbcTemplate jt; public void daoUpdateRegister(int age,int id) { String sql = "UPDATE register SET age=? WHERE id=?"; Object params[] = new Object[] { new Integer(age), new Integer(id) }; int type[] = new int[] { Types.INTEGER , Types.INTEGER }; jt.update(sql, params, type); } } package com; public interface INiutDAO { public void daoUpdateRegister(int age,int id); }
更多请见下节：http://www.mark-to-win.com/tutorial/frame_Spring_PROPAGATIONREQUIRES_NEW.html
