talk is cheap,show me the code.
代码目录结构：
-src -main -java -resource -test -pom
pom.xml
4.0.0 com.example demo 0.0.1-SNAPSHOT jar demo Demo project for Spring Boot org.springframework.boot spring-boot-starter-parent 1.5.6.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter-aop org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.slf4j slf4j-api com.alibaba fastjson LATEST org.mockito mockito-all LATEST test org.powermock powermock-core LATEST test org.powermock powermock-api-mockito LATEST test org.powermock powermock-module-testng 1.7.0 test org.springframework.boot spring-boot-maven-plugin spring-snapshots Spring Snapshots https://repo.spring.io/snapshot true spring-milestones Spring Milestones https://repo.spring.io/milestone false spring-snapshots Spring Snapshots https://repo.spring.io/snapshot true spring-milestones Spring Milestones https://repo.spring.io/milestone false
application.properties 写了，controller 配置了webroot路径和服务器端口。
server.contextPath=/testserver.port=8080
自定义注解类 Log.java：
package com.example.demo.annotation;import org.springframework.stereotype.Component;import java.lang.annotation.ElementType;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;/** * TYPE -> Class, interface (including annotation type), or enum declaration * METHOD -> Method declaration */@Target({ElementType.METHOD,ElementType.TYPE})@Retention(RetentionPolicy.RUNTIME)public @interface Log { String value() default ""; boolean ignore() default false;} 切面类，注解实现->LogAspect.java 。
package com.example.demo.impl;import com.alibaba.fastjson.JSONObject;import com.alibaba.fastjson.serializer.SerializerFeature;import com.example.demo.annotation.Log;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Pointcut;import org.aspectj.lang.reflect.MethodSignature;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.core.annotation.Order;import org.springframework.stereotype.Component;import java.lang.reflect.Method;/** * Log 注解类实现 */@Aspect@Order(100)@Componentpublic class LogAspect { public static final Logger log = LoggerFactory.getLogger(LogAspect.class); public static final String dateformat = "yyyy:MM:dd HH:mm:ss"; public static final String STIRNG_START = "\n<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"; public static final String STIRNG_END = "\n>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"; //execution the scan of pakage 切点package @Pointcut("execution( * com.example.demo..*(..))") public void serviceLog(){ } @Around("serviceLog()") public Object around(ProceedingJoinPoint joinPoint) { // ProceedingJoinPoint 为JoinPoint 的子类，在父类基础上多了proceed()方法，用于增强切面 try { // 获取方法签名 MethodSignature signature = (MethodSignature) joinPoint.getSignature(); //java reflect相关类，通过反射得到注解 Method method = signature.getMethod(); Class targetClass = method.getDeclaringClass(); StringBuffer classAndMethod = new StringBuffer(); //获取类注解Log Log classAnnotation = targetClass.getAnnotation(Log.class); //获取方法注解Log Log methodAnnotation = method.getAnnotation(Log.class); //如果类上Log注解不为空，则执行proceed() if (classAnnotation != null) { if (classAnnotation.ignore()) { //proceed() 方法执行切面方法，并返回方法返回值 return joinPoint.proceed(); } classAndMethod.append(classAnnotation.value()).append("-"); } //如果方法上Log注解不为空，则执行proceed() if (methodAnnotation != null) { if (methodAnnotation.ignore()) { return joinPoint.proceed(); } classAndMethod.append(methodAnnotation.value()); } //拼凑目标类名和参数名 String target = targetClass.getName() + "#" + method.getName(); String params = JSONObject.toJSONStringWithDateFormat(joinPoint.getArgs(), dateformat, SerializerFeature.WriteMapNullValue); log.info(STIRNG_START + "{} 开始调用--> {} 参数:{}", classAndMethod.toString(), target, params); long start = System.currentTimeMillis(); //如果类名上和方法上都没有Log注解，则直接执行 proceed() Object result = joinPoint.proceed(); long timeConsuming = System.currentTimeMillis() - start; log.info("\n{} 调用结束<-- {} 返回值:{} 耗时:{}ms" + STIRNG_END, classAndMethod.toString(), target, JSONObject.toJSONStringWithDateFormat(result, dateformat, SerializerFeature.WriteMapNullValue), timeConsuming); return result; } catch (Throwable throwable) { log.error(throwable.getMessage(), throwable); } return null; }} 接口类，测试@Log注解
package com.example.demo.service;import com.example.demo.AspectBean;import com.example.demo.annotation.Log;//@Log(value = "aspect test",ignore = true)@Log(value = "aspect test",ignore = false)public interface AspectService {// @Log("this is a method for test aspect.") public AspectBean testAspect(AspectBean aspectBean) throws InterruptedException; public boolean init();} 接口实现：
package com.example.demo.service;import com.example.demo.AspectBean;import org.springframework.stereotype.Service;import java.text.SimpleDateFormat;import java.util.Date;@Service("aspectService")public class AspectServiceImpl implements AspectService { @Override public AspectBean testAspect(AspectBean aspectBean) throws InterruptedException { // sleep 1 second Thread.sleep(1000); aspectBean.setName("update name"); aspectBean.setAge(20); aspectBean.setSex(0); aspectBean.setBirthday(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date().getTime())); return aspectBean; } @Override public boolean init() { return false; }} 定义一个bean
package com.example.demo;public class AspectBean { private String name; private int age; private String birthday; private int sex; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } public int getSex() { return sex; } public void setSex(int sex) { this.sex = sex; } @Override public String toString() { return "AspectBean{" + "name='" + name + '\'' + ", age=" + age + ", birthday=" + birthday + ", sex=" + sex + '}'; }} controller:
package com.example.demo.controller;import com.alibaba.fastjson.JSON;import com.example.demo.AspectBean;import com.example.demo.service.AspectService;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import java.text.SimpleDateFormat;import java.util.Date;@RestController@RequestMapping(value = "/aspect")public class AspectController { private static final Logger log = LoggerFactory.getLogger(AspectController.class); @Autowired private AspectService aspectService; @GetMapping(value = "/testaspect") public String testAspect() throws InterruptedException { AspectBean aspectBean = new AspectBean(); aspectBean.setAge(18); aspectBean.setBirthday(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date().getTime())); aspectBean.setSex(1); aspectBean.setName("aspect"); return JSON.toJSONString(aspectService.testAspect(aspectBean)); } @GetMapping(value = "/init") public boolean init() { return aspectService.init(); }} 用的spring boot ,启动类
package com.example.demo;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); }} 在浏览器上测试：
http://127.0.0.1:8080/test/aspect/testaspect
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 开始调用--> com.example.demo.controller.AspectController#testAspect 参数:[]2018-02-06 19:26:57.003 INFO 239676 --- [nio-8080-exec-2] com.example.demo.impl.LogAspect : <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<com.example.demo.service.AspectService#testAspect 参数:[{"age":18,"birthday":"2018-02-06 19:26:56","name":"aspect","sex":1}]2018-02-06 19:26:58.003 INFO 239676 --- [nio-8080-exec-2] com.example.demo.impl.LogAspect : aspect test- 调用结束<-- com.example.demo.service.AspectService#testAspect 返回值:{"age":20,"birthday":"2018-02-06 19:26:58","name":"update name","sex":0} 耗时:1000ms>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>2018-02-06 19:26:58.003 INFO 239676 --- [nio-8080-exec-2] com.example.demo.impl.LogAspect : 调用结束<-- com.example.demo.controller.AspectController#testAspect 返回值:"{\"age\":20,\"birthday\":\"2018-02-06 19:26:58\",\"name\":\"update name\",\"sex\":0}" 耗时:1041ms>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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