SpringBoot之AOP

 1 package com.wisely.heighlight_spring4.ch1.aop;
 2 
 3 import java.lang.annotation.Documented;
 4 import java.lang.annotation.ElementType;
 5 import java.lang.annotation.Retention;
 6 import java.lang.annotation.RetentionPolicy;
 7 import java.lang.annotation.Target;
 8 
 9 /**
10  *  
11 * Makedate:2018年3月21日 下午1:01:48  
12 * @author dong    
13 * @version %I%, %G%   
14 * @since 1.0   
15 * 注解类(jdk1.5之后没设定特殊关键字而已)
16 * 功能:拦截规则的注解
17 *      retention:保留     policy:政策 方针
18 *
19 *
20 **/
21 @Target(ElementType.METHOD)
22 @Retention(RetentionPolicy.RUNTIME)
23 @Documented
24 public @interface Action {
25     String name();
26 }

 1 package com.wisely.heighlight_spring4.ch1.aop;
 2 
 3 import org.springframework.stereotype.Service;
 4 
 5 @Service
 6 public class DemoAnnotationService {
 7     @Action(name="注解式拦截的add操作")
 8     public String add() {
 9         return "haha1";
10     }
11 }

 1 package com.wisely.heighlight_spring4.ch1.aop;
 2 
 3 import org.springframework.stereotype.Service;
 4 
 5 /**
 6  * 
 7  * 编写使用方法规则被拦截类
 8  *  
 9 * Makedate:2018年3月21日 下午3:08:39  
10 * @author dong    
11 * @version %I%, %G%   
12 * @since 1.0   
13 *  
14 *
15  */
16 @Service
17 public class DemomethodService {
18     public String add() {
19         return "hehe2";
20     }
21 }

 1 package com.wisely.heighlight_spring4.ch1.aop;
 2 
 3 import java.lang.reflect.Method;
 4 
 5 import org.aspectj.lang.JoinPoint;
 6 import org.aspectj.lang.annotation.After;
 7 import org.aspectj.lang.annotation.Aspect;
 8 import org.aspectj.lang.annotation.Before;
 9 import org.aspectj.lang.annotation.Pointcut;
10 import org.aspectj.lang.reflect.MethodSignature;
11 
12 import org.springframework.stereotype.Component;
13 
14 @Aspect            //注解声明是一个切面    切面=通知+切点   
15 @Component        //让这个切面成为spring容器管理的Bean
16 public class LogAspect {
17     @Pointcut("@annotation(com.wisely.heighlight_spring4.ch1.aop.Action)") //注解声明切点
18     public void annotationPointCut() {};
19     
20     @After("annotationPointCut()")        //注解声明通知 并使用@PointCut定义的切点
21     public void after(JoinPoint joinpoint) {
22         MethodSignature signature = (MethodSignature)joinpoint.getSignature();
23         Method method = signature.getMethod();
24         Action action = method.getAnnotation(Action.class);
25         System.out.println("注解式拦截:"+action.name());        //通过反射可以获得注解上的属性,做日志记录相关操作
26     }
27 
28     @Before("execution(* com.wisely.heighlight_spring4.ch1.aop.DemomethodService.*(..))")    
29     //@Before声明一个通知  这个通知直接使用拦截规则作为参数
30     public void before(JoinPoint joinpoint) {
31         MethodSignature signature = (MethodSignature)joinpoint.getSignature();
32         Method method = signature.getMethod();
33         System.out.println("方法规则式拦截,"+method.getName());
34     }
35 }

 1 package com.wisely.heighlight_spring4.ch1.aop;
 2 
 3 import org.springframework.context.annotation.ComponentScan;
 4 import org.springframework.context.annotation.Configuration;
 5 import org.springframework.context.annotation.EnableAspectJAutoProxy;
 6 
 7 @Configuration
 8 @ComponentScan("com.wisely.heighlight_spring4.ch1.aop")
 9 @EnableAspectJAutoProxy        //开启spring对aspecJ的支持
10 public class AopConfig {
11 
12 }

 1 package com.wisely.heighlight_spring4.ch1.aop;
 2 
 3 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 4 
 5 public class Main {
 6     public static void main(String[] args) {
 7         AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AopConfig.class);
 8         DemoAnnotationService demoAnnotationService = context.getBean(DemoAnnotationService.class);
 9         DemomethodService demomethodService = context.getBean(DemomethodService.class);
10         String add = demoAnnotationService.add();
11         System.out.println("add---"+add);
12         
13         String add2 = demomethodService.add();
14         System.out.println("add2---"+add2);
15         context.close();
16     }
17 }