使用SpringBoot+AOP實現(xiàn)可插拔式日志的示例代碼

更新時間：2019年07月26日 16:19:49 作者：Justin_Jun

這篇文章主要介紹了使用SpringBoot+AOP實現(xiàn)可插拔式日志的示例代碼，文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值，需要的朋友們下面隨著小編來一起學習學習吧

一、AOP

AOP為Aspect Oriented Programming的縮寫，意為：面向切面編程，通過預編譯方式和運行期動態(tài)代理實現(xiàn)程序功能的統(tǒng)一維護的一種技術。 AOP是OOP的延續(xù)，是軟件開發(fā)中的一個熱點，也是Spring框架中的一個重要內容，是函數(shù)式編程的一種衍生范型。

二、實現(xiàn)

引入依賴

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-aop</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <scope>test</scope>
  </dependency>
 </dependencies>

新建SysLog類

package com.example.aop.annotation;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface SysLog {
 String value() default " ";
}

新建SysLogAspect類

package com.example.aop.annotation;

import com.example.aop.service.LogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

@Aspect
@Component
public class SysLogAspect {
 @Autowired
 private LogService logService;

 @Pointcut("@annotation(com.example.aop.annotation.SysLog)")
 public void logPointCut() {}

 @Before("logPointCut()")
 public void before(JoinPoint joinPoint) {
  long beginTime = System.currentTimeMillis();
  MethodSignature signature = (MethodSignature) joinPoint.getSignature();
  Method method = signature.getMethod();
  SysLog annotation = method.getAnnotation(SysLog.class);
  String value = annotation.value();
  Object[] args = joinPoint.getArgs();
  try {
   logService.log(beginTime, "before " + method.getName());
  } catch (Exception e) {
  }
 }

 @Around("logPointCut()")
 public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
  long beginTime = System.currentTimeMillis();
  MethodSignature signature = (MethodSignature) joinPoint.getSignature();
  Method method = signature.getMethod();
  SysLog annotation = method.getAnnotation(SysLog.class);
  String value = annotation.value();
  Object[] args = joinPoint.getArgs();
  Object object = joinPoint.proceed(args);
  try {
   logService.log(beginTime, "around " + method.getName());
  } catch (Exception e) {
  }
  return object;
 }

 @After("logPointCut()")
 public void after(JoinPoint joinPoint) {
  long beginTime = System.currentTimeMillis();
  MethodSignature signature = (MethodSignature) joinPoint.getSignature();
  Method method = signature.getMethod();
  SysLog annotation = method.getAnnotation(SysLog.class);
  String value = annotation.value();
  Object[] args = joinPoint.getArgs();
  try {
   logService.log(beginTime, "after " + method.getName());
  } catch (Exception e) {
  }
 }

 @AfterReturning("logPointCut()")
 public void afterReturning(JoinPoint joinPoint) {
  long beginTime = System.currentTimeMillis();
  MethodSignature signature = (MethodSignature) joinPoint.getSignature();
  Method method = signature.getMethod();
  SysLog annotation = method.getAnnotation(SysLog.class);
  String value = annotation.value();
  Object[] args = joinPoint.getArgs();
  try {
   logService.log(beginTime, "after returning " + method.getName());
  } catch (Exception e) {
  }
 }

 @AfterThrowing("logPointCut()")
 public void afterThrowing(JoinPoint joinPoint) {
  long beginTime = System.currentTimeMillis();
  MethodSignature signature = (MethodSignature) joinPoint.getSignature();
  Method method = signature.getMethod();
  SysLog annotation = method.getAnnotation(SysLog.class);
  String value = annotation.value();
  Object[] args = joinPoint.getArgs();
  try {
   logService.log(beginTime, "after throwing " + method.getName());
  } catch (Exception e) {
  }
 }
}

新建TestService類

package com.example.aop.service;

import com.example.aop.dto.TestDomain;
import com.example.aop.annotation.SysLog;
import org.springframework.stereotype.Service;

@Service
public class TestService {
 @SysLog("log-1")
 public void log1(String name, TestDomain testDomain) {
  System.out.println("print log 1" + name + " " + testDomain.toString());
 }

 @SysLog("log-2")
 public void log2(String name, TestDomain testDomain) {
  System.out.println("print log 2" + name + " " + testDomain.toString());
 }


 @SysLog("throw-exception")
 public void throwException() {
  System.out.println("throw exception");
  int i = 3/0;
 }
}

新建TestController

package com.example.aop.controller;

import com.example.aop.dto.TestDomain;
import com.example.aop.service.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {
 @Autowired
 private TestService testService;

 @GetMapping("test")
 public String test(@RequestParam("p1") String p1) {
  TestDomain testDomain = new TestDomain();
  testDomain.setId("1");
  testDomain.setTitle("t1");
  testService.log1(p1, testDomain);
  testService.log2(p1, testDomain);
  testService.throwException();
  return "hello aop";
 }
}

三、測試

運行AopApplication, 然后訪問http://localhost:8080/test?p1=123,可以看到控制臺有以下輸出：

before log1 at: 1554903984403
print log 1123 com.example.aop.dto.TestDomain@2a7a4cd5
around log1 at: 1554903984402
after log1 at: 1554903984409
after returning log1 at: 1554903984409
before log2 at: 1554903984409
print log 2123 com.example.aop.dto.TestDomain@2a7a4cd5
around log2 at: 1554903984409
after log2 at: 1554903984410
after returning log2 at: 1554903984410
before throwException at: 1554903984410
throw exception
after throwException at: 1554903984410
after throwing throwException at: 1554903984410