Spring Aop Annotation(@Pointcut)

Z时代
2024-01-10
分类：综合

本文内容纲要：Spring Aop Annotation(@Pointcut)

@Pointcut定义一个切入点

1 @Pointcut("execution(public * com.bxw.aop.service.*.*(..))")
2     public void myMethod(){};

这表明定义一个切入点，该切入点名为myMethod

该切入点位置在com.bxw.aop.service中的所有类的所有方法。

1 package com.bxw.aop.interceptor;
 2 
 3 import org.aspectj.lang.ProceedingJoinPoint;
 4 import org.aspectj.lang.annotation.Around;
 5 import org.aspectj.lang.annotation.Aspect;
 6 import org.aspectj.lang.annotation.Pointcut;
 7 import org.springframework.stereotype.Component;
 8 
 9 @Aspect
10 @Component
11 public class UserServiceInterceptor {
12     @Pointcut("execution(public * com.bxw.aop.service.*.*(..))")
13     public void myMethod(){};
14     
15     @Around("myMethod()")
16     public void aroundMethod(ProceedingJoinPoint pjp){
17         System.out.println("login start");
18         try {
19             pjp.proceed();
20         } catch (Throwable e) {
21             e.printStackTrace();
22         }
23         System.out.println("login end");
24     }
25 }

pjp.proceed启动方法执行。

==========分界线===================

配置文件配置：

applicationContext.xml

1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"  
 3     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
 4     xmlns:cache="http://www.springframework.org/schema/cache"  
 5     xsi:schemaLocation="  
 6     http://www.springframework.org/schema/context  
 7     http://www.springframework.org/schema/context/spring-context.xsd  
 8     http://www.springframework.org/schema/beans  
 9     http://www.springframework.org/schema/beans/spring-beans.xsd  
10     http://www.springframework.org/schema/tx  
11     http://www.springframework.org/schema/tx/spring-tx.xsd  
12     http://www.springframework.org/schema/jdbc  
13     http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd  
14     http://www.springframework.org/schema/cache  
15     http://www.springframework.org/schema/cache/spring-cache-3.1.xsd  
16     http://www.springframework.org/schema/aop  
17     http://www.springframework.org/schema/aop/spring-aop.xsd  
18     http://www.springframework.org/schema/util  
19     http://www.springframework.org/schema/util/spring-util.xsd">
20     <!-- 初始化bean -->  
21     <context:component-scan base-package="com.bxw.aop.*"></context:component-scan>
22     <!-- 初始化aop --> 
23         <!-- 将interceptor声明为bean -->
24     <bean id="myInterceptor" class="com.bxw.aop.interceptor.UserServiceInterceptor"></bean>
25     <aop:config>
26         <aop:aspect id="myAspect" ref="myInterceptor">
27             <aop:around method="aroundMethod" pointcut="execution(public * com.bxw.aop.service.*.*(..))"/>
28         </aop:aspect>
29     </aop:config>
30 </beans>