使用Spring的注解方式实现AOP

雨点打透心脏的1/2处 2022-07-12 07:45 147阅读 0赞

代码：

1.配置文件：

beans.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"
    	xmlns:context="http://www.springframework.org/schema/context"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans 
    	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    	http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-aop-2.5.xsd">
    	
        <aop:aspectj-autoproxy/>
        <bean id="myInterceptor" class="com.service.MyInterceptor"/>
        <bean id="personService" class="com.service.impl.PersonServiceBean"/>
    	
    	
    </beans>

2.源码

PersonService.java

package com.service;
    
    public interface PersonService {
    	public void save(String name);
    	public void update(String name,Integer id);
    	public String getPersonName(Integer id);
    
    }

MyInterceptor.java

package com.service;
    
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.After;
    import org.aspectj.lang.annotation.AfterReturning;
    import org.aspectj.lang.annotation.AfterThrowing;
    import org.aspectj.lang.annotation.Around;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    import org.aspectj.lang.annotation.Pointcut;
    //基于注解方式声明切面
    /*
     * 切面
     */
    @Aspect  
    public class MyInterceptor {
      //拦截切面
      @Pointcut("execution (* com.service.impl.PersonServiceBean.*(..))")
      private void anyMethod() {} //声明一个切入点
      
      @Before("anyMethod() && args(name)")
      public void doAccessCheck(String name){
    	  System.out.println("前置通知:"+name);
      }
      
      @AfterReturning(pointcut="anyMethod()",returning="result")
      public void doAfterReturning(String result){
    	  System.out.println("后置通知:"+result);
      }
      
      @After("anyMethod()")
      public void doAfter(){
    	  System.out.println("最终通知");
      }
      
      @AfterThrowing(pointcut="anyMethod()",throwing="e")
      public void doAfterThrowing(Exception e){
    	  System.out.println("例外通知:"+e);
      }
      //环绕通知
      @Around("anyMethod()")
      public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable{
    	  //判断是否有权限
    	  System.out.println("进入方法");
    	  Object result=pjp.proceed();
    	  System.out.println("退出方法");
    	  return result;
      }
      
    }

PersonServiceBean.java

package com.service.impl;
    
    import javax.management.RuntimeErrorException;
    
    import com.service.PersonService;
    
    public class PersonServiceBean implements PersonService {
    
    	@Override
    	public void save(String name) {
    		// TODO Auto-generated method stub
    		throw new RuntimeException("我爱例外");
    		//System.out.println("我是save()方法");
    	}
    
    	@Override
    	public void update(String name, Integer id) {
    		// TODO Auto-generated method stub
    		System.out.println("我是update()方法");
    	}
    
    	@Override
    	public String getPersonName(Integer id) {
    		// TODO Auto-generated method 
    		System.out.println("我是getPersonName()方法");
    		return "xxx";
    	}
       
    }

3.单元测试文件

SpringTest.java

package junit.test;
    
    import static org.junit.Assert.*;
    
    import org.junit.BeforeClass;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.service.PersonService;
    
    public class SpringTest {
    
    	@BeforeClass
    	public static void setUpBeforeClass() throws Exception {
    	}
    
    	@Test
    	public void interceptorTest() {
    		ApplicationContext cxt=new ClassPathXmlApplicationContext("beans.xml");
    		PersonService personService=(PersonService)cxt.getBean("personService");
    		//personService.getPersonName(2);//调用方法返回结果参数
    		personService.save("xxx");
    		
    	}
    
    }