详解Spring Aop实例之xml配置

package com.tgb.aop; public interface UserManager {    public String findUserById(int userId); }   package com.tgb.aop;  public class UserManagerImpl implements UserManager {    public String findUserById(int userId) {     System.out.println("---------UserManagerImpl.findUserById()--------");     if (userId <= 0) {       throw new IllegalArgumentException("该用户不存在!");      }     return "张三";   } }

package com.tgb.aop; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint;  /**  * Advice通知类  * 测试after,before,around,throwing,returning Advice.  * @author Admin  *  */ public class XMLAdvice {    /**    * 在核心业务执行前执行，不能阻止核心业务的调用。    * @param joinPoint    */   private void doBefore(JoinPoint joinPoint) {     System.out.println("-----doBefore().invoke-----");     System.out.println(" 此处意在执行核心业务逻辑前，做一些安全性的判断等等");     System.out.println(" 可通过joinPoint来获取所需要的内容");     System.out.println("-----End of doBefore()------");   }      /**    * 手动控制调用核心业务逻辑，以及调用前和调用后的处理,    *    * 注意：当核心业务抛异常后，立即退出，转向After Advice    * 执行完毕After Advice，再转到Throwing Advice    * @param pjp    * @return    * @throws Throwable    */   private Object doAround(ProceedingJoinPoint pjp) throws Throwable {     System.out.println("-----doAround().invoke-----");     System.out.println(" 此处可以做类似于Before Advice的事情");          //调用核心逻辑     Object retVal = pjp.proceed();          System.out.println(" 此处可以做类似于After Advice的事情");     System.out.println("-----End of doAround()------");     return retVal;   }    /**    * 核心业务逻辑退出后（包括正常执行结束和异常退出），执行此Advice    * @param joinPoint    */   private void doAfter(JoinPoint joinPoint) {     System.out.println("-----doAfter().invoke-----");     System.out.println(" 此处意在执行核心业务逻辑之后，做一些日志记录操作等等");     System.out.println(" 可通过joinPoint来获取所需要的内容");     System.out.println("-----End of doAfter()------");   }      /**    * 核心业务逻辑调用正常退出后，不管是否有返回值，正常退出后，均执行此Advice    * @param joinPoint    */   private void doReturn(JoinPoint joinPoint) {     System.out.println("-----doReturn().invoke-----");     System.out.println(" 此处可以对返回值做进一步处理");     System.out.println(" 可通过joinPoint来获取所需要的内容");     System.out.println("-----End of doReturn()------");   }      /**    * 核心业务逻辑调用异常退出后，执行此Advice，处理错误信息    * @param joinPoint    * @param ex    */   private void doThrowing(JoinPoint joinPoint,Throwable ex) {     System.out.println("-----doThrowing().invoke-----");     System.out.println(" 错误信息："+ex.getMessage());     System.out.println(" 此处意在执行核心业务逻辑出错时，捕获异常，并可做一些日志记录操作等等");     System.out.println(" 可通过joinPoint来获取所需要的内容");     System.out.println("-----End of doThrowing()------");   } } 

<?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: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-2.0.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">              <bean id="userManager" class="com.tgb.aop.UserManagerImpl"/>      <!--<bean id="aspcejHandler" class="com.tgb.aop.AspceJAdvice"/>-->   <bean id="xmlHandler" class="com.tgb.aop.XMLAdvice" />   <aop:config>     <aop:aspect id="aspect" ref="xmlHandler">       <aop:pointcut id="pointUserMgr" expression="execution(* com.tgb.aop.*.find*(..))"/>              <aop:before method="doBefore" pointcut-ref="pointUserMgr"/>       <aop:after method="doAfter" pointcut-ref="pointUserMgr"/>       <aop:around method="doAround" pointcut-ref="pointUserMgr"/>       <aop:after-returning method="doReturn" pointcut-ref="pointUserMgr"/>       <aop:after-throwing method="doThrowing" throwing="ex" pointcut-ref="pointUserMgr"/>            </aop:aspect>   </aop:config> </beans> 

package com.tgb.aop;  import org.springframework.beans.factory.BeanFactory; import org.springframework.context.support.ClassPathXmlApplicationContext;  public class Client {    public static void main(String[] args) {     BeanFactory factory = new ClassPathXmlApplicationContext("applicationContext.xml");     UserManager userManager = (UserManager)factory.getBean("userManager");          //可以查找张三     userManager.findUserById(1);          System.out.println("=====我==是==分==割==线=====");      try {       // 查不到数据，会抛异常，异常会被AfterThrowingAdvice捕获       userManager.findUserById(0);     } catch (IllegalArgumentException e) {     }   } }