springboot2.0中怎么通过自定义注解获取方法返回值

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springboot2.0 自定义注解通过类或者方法切面并且获取方法的返回值

新增一个自定义注解

package com.example.demo.annotation;import java.lang.annotation.ElementType;import java.lang.annotation.Target;@Target({ElementType.METHOD,ElementType.FIELD,ElementType.TYPE})public @interface TestA {}

新增一个切面,

package com.example.demo.Aspect;import lombok.extern.slf4j.Slf4j;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Pointcut;import org.springframework.stereotype.Component;import javax.servlet.http.HttpServletRequest;/** * @auth: xinhui * @date: **/@Slf4j@Aspect@Componentpublic class DemoAspect {    @Pointcut("@within(com.example.demo.annotation.TestA)")//注解在类上的用  //@Pointcut("@annotation(com.example.demo.annotation.TestA)")//注解在方法上    public void addAdvice(){}    @AfterReturning(returning = "rvl",pointcut="@within(com.example.demo.annotation.TestA)" )//注解在类上面//@AfterReturning(returning = "rvl",pointcut="@within(com.example.demo.annotation.TestA)" )//注解在方法上    public void afterReturn(JoinPoint joinPoint,Object rvl) throws ClassNotFoundException {        Object[] args = joinPoint.getArgs();//参数        log.info("--------args:{}",args.length);        log.info("============打印日志开始============");        log.info("target：{}",joinPoint.getTarget().getClass());        for(Object o:args) {            log.info("参数：{}",o);        }        log.info("返回参数：{}",rvl);        log.info("kind:{}",joinPoint.getKind());        String classType = joinPoint.getTarget().getClass().getName();        Class clazz = Class.forName(classType);        String clazzName = clazz.getName();        String methodName = joinPoint.getSignature().getName(); //获取方法名称        log.info("============打印日志结束============");    }}

新增一个service类

package com.example.demo.test;import com.example.demo.annotation.TestA;import com.example.demo.model.SayEntity;import lombok.extern.slf4j.Slf4j;import org.springframework.stereotype.Service;/** * @auth: xinhui * @date: 2019/10/8 8:52 下午 **/@Service("demoTest")@Slf4j@TestApublic class DemoTest {//    @TestA    public SayEntity say(String saystr,String origin) {log.info("say is start");        SayEntity say = new SayEntity(saystr, origin);        return say;    }}

新增controller信息

package com.example.demo;import com.example.demo.test.DemoTest;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.EnableAspectJAutoProxy;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;@SpringBootApplication@RestController@EnableAspectJAutoProxy@ComponentScan(basePackages = {"com.example.demo"})public class DemoApplication {    public static void main(String[] args) {        SpringApplication.run(DemoApplication.class, args);    }    @Autowired    DemoTest demoTest;    @RequestMapping(value = "/demo/aop",method = RequestMethod.GET)    public Object mapping(){        String say="say hello";String origin="origin";        return demoTest.say(say,origin);    }}

打印日志的信息

2019-10-09 11:41:42.829  INFO 2264 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''2019-10-09 11:41:42.832  INFO 2264 --- [  restartedMain] com.example.demo.DemoApplication         : Started DemoApplication in 2.331 seconds (JVM running for 3.133)2019-10-09 11:41:48.810  INFO 2264 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'2019-10-09 11:41:48.810  INFO 2264 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'2019-10-09 11:41:48.819  INFO 2264 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 9 ms2019-10-09 11:41:48.856  INFO 2264 --- [nio-8080-exec-1] com.example.demo.test.DemoTest           : say is start2019-10-09 11:41:48.858  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : --------args:22019-10-09 11:41:48.859  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : ============打印日志开始============2019-10-09 11:41:48.859  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : target：class com.example.demo.test.DemoTest2019-10-09 11:41:48.859  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : 参数：say hello2019-10-09 11:41:48.859  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : 参数：origin2019-10-09 11:41:48.860  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : 返回参数：SayEntity(say=say hello, eat=origin)2019-10-09 11:41:48.860  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : kind:method-execution2019-10-09 11:41:48.861  INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect       : ============打印日志结束============

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