Spring AOP基于XML注解开发

青旅半醒 2021-11-19 14:18 434阅读 0赞

## 1导的包和目录结构 ##

![在这里插入图片描述][20190727195414494.png]![在这里插入图片描述][20190727195430913.png]

## 2XML配置文件 ##

<?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:context="http://www.springframework.org/schema/context"
           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">
    
        <context:component-scan base-package="com.baidu"></context:component-scan>
        
        <context:annotation-config/>
    
        <bean id="deptService" class="com.baidu.XML.DeptServiceImp"></bean>
        <bean id="myXML"  class="com.baidu.XML.MyXML"></bean>
    
        <aop:config>
    
               <aop:aspect ref="myXML">
       <aop:pointcut id="poi1" expression="execution(* com.baidu.XML.DeptServiceImp.*(..))"></aop:pointcut>
    
       <aop:pointcut id="poi2" expression="execution(* com.baidu.XML.DeptServiceImpl.findName(..))"></aop:pointcut>
       <aop:before method="myBefore" pointcut-ref="poi1"></aop:before>
     <aop:after-returning method="myAfter" pointcut-ref="poi1" returning="reval"></aop:after-returning>
    
              </aop:aspect>
    
        </aop:config>
    
    
    </beans>

## 3接口和实现类 ##

package com.baidu.XML;
    
    public interface DeptServiceI {
        void add();
        void del();
        String findName();
    }

package com.baidu.XML;
    
    public class DeptServiceImp implements DeptServiceI {
        @Override
        public void add() {
            System.out.println("add---");
    
        }
    
        @Override
        public void del() {
            System.out.println("del---");
    
        }
    
        @Override
        public String findName() {
            System.out.println(" findName");
            //int i=1/0;
            return "Lisi";
        }
    }

## 4开发类 ##

package com.baidu.XML;
    
    
    import org.aspectj.lang.JoinPoint;
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    import org.aspectj.lang.annotation.Pointcut;
    
    //纯注解开发
    @Aspect
    public class MyXML {
    
       //@Before(value = "execution(* com.baidu.AspectJ.DeptServiceImp.*(..))")
        public  void  myBefore(JoinPoint joinPoint){
    
        System.out.println("前置增强"+joinPoint);
    }
    
    
      // @AfterReturning(value = "execution(* com.baidu.AspectJ.DeptServiceImp.findName(..))",returning="reval")
    
    public  void  myAfter(JoinPoint joinPoint,Object reval){
    
        System.out.println("后置增强,返回值："+reval);
    }
    
       // @Around(value ="execution(* com.baidu.AspectJ.DeptServiceImp.findName(..))")
    
    public Object myAround(ProceedingJoinPoint point) throws Throwable {
    
        System.out.println("环绕通知前1");
        Object returnVal=point.proceed();
        System.out.println("环绕通知后2");
        return returnVal;
    
    }
    
    //@AfterThrowing(value ="execution(* com.baidu.AspectJ.DeptServiceImp.findName(..))",throwing = "ex")
    
    public void myAfterThrowing(JoinPoint joinPoint,Throwable ex) {
    
        System.out.println("异常通知，异常信息是：" + ex.getMessage());
    
    }
    
    
       // @After(value ="execution(* com.baidu.AspectJ.DeptServiceImp.findName(..))")
    
    public void myAfter() {
    
        System.out.println("最终通知" );
    
    }
    
    //简化表达式
        @Before(value = "MyAspectJ.zz()")
        public  void  myBeforePointcut(JoinPoint joinPoint){
    
        System.out.println("前置增强"+joinPoint);
    }
    @Pointcut(value = "execution(* com.baidu.XML.DeptServiceImp.*(..))")
        private  void  zz(){
    
    }
    
    }

## 5测试类 ##

package com.baidu.XML;
    
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class TestMyXML {
    
        public static void main(String[] args) {
    
            ClassPathXmlApplicationContext applicationContext =
                    new ClassPathXmlApplicationContext("XMLapplicationContext.xml");
    
            DeptServiceI deptServiceI = (DeptServiceI)applicationContext.getBean("deptService");//
            deptServiceI.add();
            deptServiceI.del();
            deptServiceI.findName();
    
        }
    }

## 6运行结果 ##

前置增强execution(void com.baidu.XML.DeptServiceI.add())
    add---
    最终通知
    前置增强execution(void com.baidu.XML.DeptServiceI.del())
    del---
    最终通知
    前置增强execution(String com.baidu.XML.DeptServiceI.findName())
     findName
    最终通知
    
    Process finished with exit code 0

[20190727195414494.png]: https://img-blog.csdnimg.cn/20190727195414494.png
[20190727195430913.png]: /images/20211119/e509eba71e534959b251154f38c14c59.png