Spring AOP-通知-为目标方法织入多个切面

墨蓝 2022-06-18 11:49 194阅读 0赞

# AOP-通知-为目标方法织入多个切面 #

**开发中可能会遇到为目标方法织入多个切面，比如前置。后置通知都需要**

## 接口 ##

package com.hk.spring.aop06;
    
    public interface SomeService {
    
        public void doFirst();
        public void doSecond();
    }

## 接口实现 ##

package com.hk.spring.aop06;
    
    public class SomeServiceImpl implements SomeService { 
    
        @Override
        public void doFirst() {
    
            System.out.println("主业务doFirst");
        }
    
        @Override
        public void doSecond() {
    
            System.out.println("主业务doSecond");
        }
    
    }

## 前置通知 ##

kpackage com.hk.spring.aop06;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

/\*\*  
\* 前置通知  
\* @author 浪丶荡  
\*  
\*/  
public class MyMethodBeforeAdvice implements MethodBeforeAdvice \{

//在目标方法执行之前执行
    @Override
    public void before(Method method, Object[] args, Object target)
            throws Throwable {
        System.out.println("前置通知执行");
    }

## 后置通知 ##

package com.hk.spring.aop06;
    
    import java.lang.reflect.Method;
    
    import org.springframework.aop.AfterReturningAdvice;
    
    /** * 后置通知 * @author 浪丶荡 * */
    public class MyAfterReturningAdvice implements AfterReturningAdvice { 
    
        //在目标方法执行之后执行
        @Override
        public void afterReturning(Object returnValue, Method method,
                Object[] args, Object target) throws Throwable {
            System.out.println("后置通知执行");
        }
    
    
    }

## 配置文件 ##

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
    
    <beans>
        <bean name = "someService" class="com.hk.spring.aop06.SomeServiceImpl"></bean>
        
        <bean name = "myMethodBeforeAdvice" class="com.hk.spring.aop06.MyMethodBeforeAdvice"></bean>
        
        <bean name = "myAfterReturningAdvice" class="com.hk.spring.aop06.MyAfterReturningAdvice"></bean>
        
        <bean name = "serviceProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
        
        <property name="target" ref="someService"/>
        
        
        <property name="interceptorNames" value="myMethodBeforeAdvice,myAfterReturningAdvice"/>
        
        </bean>
    
    </beans>

## 测试 ##

package com.hk.spring.aop06;
    
    
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.hk.spring.aop06.SomeService;
    public class Mytest {
    
        @Test
        public void test1(){
            String resoure = "com/hk/spring/aop06/applicationContext.xml";
            ApplicationContext ac = new ClassPathXmlApplicationContext(resoure);
            SomeService someService = (SomeService) ac.getBean("serviceProxy");
            someService.doFirst();
            someService.doSecond();
        }
    }

## 结果 ##

前置通知执行
    主业务doFirst
    后置通知执行
    前置通知执行
    主业务doSecond
    后置通知执行