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) { 
    } 
  } 
}