Spring--Aop_xml

爱被打了一巴掌 2024-02-18 15:12 43阅读 0赞

bean.xml

<?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:p="http://www.springframework.org/schema/p"
    	xmlns:aop="http://www.springframework.org/schema/aop"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans
             http://www.springframework.org/schema/beans/spring-beans.xsd
             http://www.springframework.org/schema/context
             http://www.springframework.org/schema/context/spring-context-2.5.xsd
             http://www.springframework.org/schema/aop
             http://www.springframework.org/schema/aop/spring-aop-4.3.xsd"
    	xmlns:context="http://www.springframework.org/schema/context">
    	
    	<context:component-scan base-package="com.dw"/>
    	
        <bean id = "car" class = "com.dw.car.impl.Tanke"/>
    	
    	<bean id = "iterception" class="com.dw.model.Iterception"/>
    	<aop:config>
    	  <aop:pointcut expression="execution(* com.dw.car.*.*(..))" id="point"/>
    	  <aop:aspect id="aspect" ref="iterception">
    	    <aop:before method="before1" pointcut-ref="point"/>
    	    <aop:after-returning method="after1" pointcut-ref="point"/>
    	    <aop:around method="around1" pointcut="execution(* com.dw.car.*.*(..))"/>
    	  </aop:aspect>
    	</aop:config>
    </beans>

Iterception.java:

package com.dw.model;
    
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.AfterReturning;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    import org.aspectj.lang.annotation.Pointcut;
    import org.springframework.stereotype.Component;
    
    //@Aspect
    //@Component
    public class Iterception {
    	
    //	@Pointcut("execution(* com.dw.car.*.*(..))")
    //	public void myMethod(){};
    //	
    //	//@Before("execution(public void com.dw.car.impl.Tanke.move())")
    //	@Before("execution(* com.dw.car.*.*(..))")
    //  public void before() {
    //	System.out.println("exec before");
    //}
    //
    //	@AfterReturning("execution(* com.dw.car.*.*(..))")
    //	public void afterReturning() {
    //		System.out.println("exec after");
    //	}	
    	
    	public void before1() {
    		System.out.println("before……");
    	}
    	
    	public void after1() {
    		System.out.println("after……");
    	}
    	public void around1(ProceedingJoinPoint pjp) {
    		System.out.println("around 1 ……");
    		System.out.println("around 2 ……");
    		try {
    			pjp.proceed();
    		} catch (Throwable e) {
    			e.printStackTrace();
    		}
    		
    		System.out.println("around 3 ……");
    	}
    }

输出：

before……  
around 1 ……  
around 2 ……  
tanke is moving!  
around 3 ……  
after……

Aspectj是一个面向切面的框架，使用时需要引入相关jar包。aop的内部实现原理是动态代理。