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【SSM-Spring】AOP

分类: 文章 • 2024-08-17 22:26:16

XML方式配置AOP

代码：
1AopSD.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:context="http://www.springframework.org/schema/context"
       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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="Spring.Service"/>

    <bean id="loggerAspect" class="Spring.Aspect.ShouDongAspect"/>

<!--    手动配置AOP：-->
    <aop:config>
       <!-- 配置的切点   触发的条件-->
        <aop:pointcut id="pointcut"
          expression="execution(* Spring.Service.ProductService.doSome(..))"/>
  <!--  切面和通知-->
    <aop:aspect ref="loggerAspect" order="2">
       <!-- method 就是Aspect 类中真实存在的方法-->
       <!-- point-ref 到切点-->
        <aop:around method="SDaround" pointcut-ref="pointcut"/>
    </aop:aspect>
    </aop:config>
</beans>

2.Aspect

package Spring.Aspect;

import org.aspectj.lang.ProceedingJoinPoint;

public class ShouDongAspect {
    public Object SDaround(ProceedingJoinPoint joinPoint) throws Throwable{
        System.out.println("start log:" + joinPoint.getSignature().getName());
        Object obj = joinPoint.proceed();
        System.out.println("end log:" + joinPoint.getSignature().getName());
        return obj;
    }
}

3.Service

package Spring.Service;

import org.springframework.stereotype.Component;

@Component("ps")
public class ProductService {
    public void doSome(){
        System.out.println("do Something");
    }

    public String doreturn(){
        System.out.println("doreturn ");
        return "return了一个值";
    }
}

4.Test

package Spring.AOP.AopSDTest;

import Spring.Service.ProductService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:/Aop/AopSD.xml")
public class AopSD {

    @Autowired
    private ProductService psd;

    @Test
    private void aopSd(){
        psd.doSome();
    }
}

使用AspectJ开发AOP

xml中的配置：

<aop:aspectj-autoproxy/>

**使用到的注解：
@Aspect 注解了这是一个Aspect
@Order（n） n为正整数 规定了Aspect之间的执行顺序
@PointCut（value=(execution(* 类.*.(..)))） 定义了切点
public void poitcut_Name(){} //方法名就是切点名

   @Before（value=“pointcut_Name() ”）//前置通知

   public void before(JoinPoint joinPoint){

    System.out.println("前置通知=================="+joinPoint);
}

//后置通知有返回值的可以获取返回值

  @AfterReturning(value="myPointcut2()",returning = "result")**
      public void afterReturing(Object result){
    
        System.out.println("后置通知=================="+result);
    }

//环绕通知Around

@Around(value="myPointcut3()")
public Object around(ProceddingJoinPoint joinPoint) throws Throwable{
	  System.out.println("环绕前通知================");
        Object object = joinPoint.proceed();// 执行目标方法
        System.out.println("环绕后通知================");
        return obj;
}

//最终通知：

@After(value="myPointcut5()")
public void after() {
    System.out.println("最终通知==================");
}

//异常通知 AfterThrowing

@AfterThrowing(value="myPointcut4()",throwing = "e")
public void afterThrowing(Throwable e) {
    System.out.println("异常抛出通知=============="+e.getMessage());
}

AspectJ代码：

1.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:context="http://www.springframework.org/schema/context"
       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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="Spring.Service"/>
    <context:component-scan base-package="Spring.Aspect"/>
    <aop:aspectj-autoproxy/>
</beans>

2.Service

package Spring.Service;

import org.springframework.stereotype.Component;

@Component("ps")
public class ProductService {
    public void doSome(){
        System.out.println("do Something");
    }

    public String doreturn(){
        System.out.println("doreturn ");
        return "return了一个值";
    }
}

3.Aspect：
3.1永远在前的OrderAspect：

package Spring.Aspect;


import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;


@Order(1)
@Component
@Aspect
public class OrderAspect {
    @Before(value = "orderPointcut()")
    public void beforee(){
        System.out.println( " 我永远在前面");
    }

    @Pointcut(value = "execution(* Spring.Service.ProductService.*(..))")
    public void orderPointcut(){}
}

3.2LoggerAspect

package Spring.Aspect;

import Spring.Service.ProductService;
import com.sun.corba.se.spi.ior.ObjectKey;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;


@Component
@Aspect
public class LoggerAspect {
    @Before(value = "beforePoint()")
    public void before(){
        System.out.println( " Aspect Before");
    }

    @Around(value ="aroundPoint()")
    public Object around(ProceedingJoinPoint joinPoint) throws Throwable{
        System.out.println("环绕前通知================");
        Object obj = joinPoint.proceed(); // 执行目标方法
        System.out.println("环绕后通知================");
        return obj;
    }
    @AfterReturning(value = "afterReturning()",returning="result")
    private void afterAspect(Object result){
        System.out.println("后置通知 ："+result);
    }

    @Pointcut(value = "execution(* Spring.Service.ProductService.*(..))")
    public void beforePoint(){}
    @Pointcut(value = "execution(* Spring.Service.ProductService.*(..))")
    private void aroundPoint(){}
    @Pointcut(value = "execution(* Spring.Service.ProductService.doreturn(..))")
    public void afterReturning(){}
}

4.Test
使用
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(“classpath:/Aop/Aop1.xml”)
直接又省掉了ApplicationContext的使用

package Spring.Aop1;

import Spring.Service.ProductService;
import javafx.application.Application;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;


@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:/Aop/Aop1.xml")
public class AopTest1 {

    @Autowired
    private ProductService pro;
    @Test
    public void aop1(){
        pro.doSome();
        System.out.println(" ----------");
        pro.doreturn();
    }
}

【SSM-Spring】AOP

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