spring5之AOP的基本操作

今天补发之前说的关于AOP的一些操作

Spring 框架一般都是基于 AspectJ 实现 AOP 操作，所以要使用AOP操作要导AOP相关依赖

 <dependency>             <groupId>org.aspectj</groupId>             <artifactId>aspectjtools</artifactId>             <version>1.9.5</version>         </dependency>          <dependency>             <groupId>aopalliance</groupId>             <artifactId>aopalliance</artifactId>             <version>1.0</version>         </dependency>          <dependency>             <groupId>org.aspectj</groupId>             <artifactId>aspectjweaver</artifactId>             <version>1.9.0</version>         </dependency>          <dependency>             <groupId>cglib</groupId>             <artifactId>cglib</artifactId>             <version>3.3.0</version>         </dependency>

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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: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> <!--    开启注解的扫描-->     <context:component-scan base-package=Spring></context:component-scan>  <!--    开启aspect生成代理对象-->     <aop:aspectj-autoproxy></aop:aspectj-autoproxy>  </beans>

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首先是被增强类，里面内容随便写点

//被增强类 @Component public class User {     public void add() {         System.out.println(add .....);     } }

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然后是增强类，切入点表达式语法结构： execution([权限修饰符] [返回类型] [类全路径] [方法名称]([参数列表]) )：

//增强类 @Component @Aspect @Order(1)  public class Userproxy {     //相同切入点抽取     @Pointcut(value = execution(* Spring.Aopanno.User.add(..)))     public void pointdemo(){     }      //前置通知     @Before(value = pointdemo())     public void before(){         System.out.println(before .........);     }     //最终通知     @After(value = execution(* Spring.Aopanno.User.add(..)))     public void after(){         System.out.println(after .........);     }     //后置通知     @AfterReturning(value = execution(* Spring.Aopanno.User.add(..)))     public void afterrun(){         System.out.println(afterrun .........);     }     //异常通知     @AfterThrowing(value = execution(* Spring.Aopanno.User.add(..)))     public void afterthrow(){         System.out.println(afterthrow .........);     }     //环绕通知     @Around(value = execution(* Spring.Aopanno.User.add(..)))     public void around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable{         System.out.println(环绕之前.........);         //被增强的方法执行         proceedingJoinPoint.proceed();         System.out.println(环绕之后.........);     } }

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测试就用user类获取spring创建的对象来测试