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这篇文章将为大家详细讲解有关springboot2.0中怎么通过自定义注解获取方法返回值,文章内容质量较高,因此小编分享给大家做个参考,希望大家阅读完这篇文章后对相关知识有一定的了解。
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 @Component public 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 @TestA public 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 ms 2019-10-09 11:41:48.856 INFO 2264 --- [nio-8080-exec-1] com.example.demo.test.DemoTest : say is start 2019-10-09 11:41:48.858 INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect : --------args:2 2019-10-09 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.DemoTest 2019-10-09 11:41:48.859 INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect : 参数:say hello 2019-10-09 11:41:48.859 INFO 2264 --- [nio-8080-exec-1] com.example.demo.Aspect.DemoAspect : 参数:origin 2019-10-09 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-execution 2019-10-09 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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