Srping AOP基于注解和配置文件方式实现前通知，后通知，环绕通知，异常通知，最终通知

青旅半醒 2022-06-05 02:58 203阅读 0赞

**Srping AOP基于注解和配置文件方式实现前通知，后通知，环绕通知，异常通知，最终通知**

**注解方式：**

1、切面类

package cn.sz.aspect;
    
    import org.aspectj.lang.JoinPoint;
    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.springframework.stereotype.Component;
    
    //这是一个横向抽取非主要业务方法的类
    @Component
    @Aspect
    public class MyAspect {
    	@Before(value = "execution(* cn.sz.dao.impl.*.*(..))")
    	public void login(JoinPoint jp) {
    		// 获取连接点的信息
    		Object o = jp.getThis();
    		System.out.println(o);
    		// ((UserDao)o).delete();
    
    		System.out.println("login.......");
    	}
    
    	@AfterReturning(value = "execution(* cn.sz.dao.impl.*.*(..))")
    	public void log4j() {
    		System.out.println("log4j......");
    	}
    
    	@Around(value = "execution(* cn.sz.dao.impl.*.*(..))")
    	public void rou(ProceedingJoinPoint pjp) throws Throwable {
    		System.out.println("round......1");
    
    		pjp.proceed();
    
    		System.out.println("round......2");
    	}
    
    	@AfterThrowing(value = "execution(* cn.sz.dao.impl.*.*(..))")
    	public void exception() {
    		System.out.println("exception......");
    	}
    
    	@After(value = "execution(* cn.sz.dao.impl.*.*(..))")
    	public void finallyF() {
    		System.out.println("finallyF......");
    	}
    }

2、主配置文件

3、测试接口 UserDAO

package cn.sz.dao;
    
    public interface UserDAO {
    	public void save();
    }

4.接口实现类

package cn.sz.dao.impl;
    
    import cn.sz.dao.UserDAO;
    
    //主要业务功能类
    public class UserDAOImpl implements UserDAO {
    
    	@Override
    	public void save() {
    		// 测试出异常
    		// String a = null;
    		// a.length();
    		System.out.println("save...");
    	}
    
    }

5、测试类

package cn.sz.test;
    
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import cn.sz.dao.UserDAO;
    
    public class AopTest {
    
    	@Test
    	public void test1() {
    		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    		UserDAO userDAO = ac.getBean("userDao", UserDAO.class);
    		userDAO.save();
    	}
    }

**配置文件方式：**

1、切面类

package cn.sz.aspect;
    
    import org.aspectj.lang.JoinPoint;
    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.springframework.stereotype.Component;
    
    //这是一个横向抽取非主要业务方法的类
    
    public class MyAspect {
    	
    	public void login(JoinPoint jp) {
    		// 获取连接点的信息
    		Object o = jp.getThis();
    		System.out.println(o);
    		// ((UserDao)o).delete();
    
    		System.out.println("login.......");
    	}
    
    	
    	public void log4j() {
    		System.out.println("log4j......");
    	}
    
    	
    	public void rou(ProceedingJoinPoint pjp) throws Throwable {
    		System.out.println("round......1");
    
    		pjp.proceed();
    
    		System.out.println("round......2");
    	}
    
    
    	public void exception() {
    		System.out.println("exception......");
    	}
    
    	
    	public void finallyF() {
    		System.out.println("finallyF......");
    	}
    }

2、主配置文件

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:context="http://www.springframework.org/schema/context"
    	xmlns:aop="http://www.springframework.org/schema/aop"
    	xmlns:user="http://www.springframework.org/schema/p"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        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.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
            ">
    		
    	<bean id="myAspect" class="com.sz.aspect.MyAspect"></bean>
    	
    	<bean id="userDao" class="com.sz.dao.impl.UserDaoImpl"></bean>
    	
    	<aop:config>
    		
    		<aop:aspect ref="myAspect" id="my">
    			
    			<aop:pointcut expression="execution(* com.sz.dao.impl.UserDaoImpl.*(..))" id="p1"/>
    			
    			
    			<aop:before method="login" pointcut-ref="p1"/>
    			
    			
    			<aop:after-returning method="log4j" pointcut-ref="p1"/>
    			
    			
    			<aop:around method="rou" pointcut-ref="p1"/>
    			
    			
    			<aop:after-throwing method="exception" pointcut-ref="p1"/>
    			
    			
    			<aop:after method="finallyF" pointcut-ref="p1"/>
    		</aop:aspect>
    	</aop:config>
    </beans>

3、测试接口UserDAO

package cn.sz.dao;
    
    public interface UserDAO {
    	public void save();
    }

4.接口实现类

5、测试类