起因

在一次排查接口请求较慢的问题时，发现没有打印请求耗时，而涉及的接口又比较多，无法所有接口都进行更改排查，所以用AOP技术在这个场景进行简单计算就非常的方便，无需改动原有接口

示例

import com.alibaba.fastjson.JSON;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

/**
 * 对所有接口的请求响应做切面处理
 */
@Aspect
@Configuration
public class RequestAopConfig {

	protected Logger log = LoggerFactory.getLogger(this.getClass());

	@Resource
	private HttpServletRequest request;

	private static final ThreadLocal<Long> START_TIME_MILLIS = new ThreadLocal<>();

	@Pointcut("execution(* com.springmvc.controller..*.*(..))")
	public void controllerMethodPointcut() {
	}

	/**
	 * 前置通知
	 */
	@Before("controllerMethodPointcut()")
	public void before(JoinPoint joinPoint) {
		START_TIME_MILLIS.set(System.currentTimeMillis());
	}

	/**
	 * 后置通知
	 */
	@AfterReturning(value = "controllerMethodPointcut()", returning = "result")
	public void afterReturning(JoinPoint joinPoint, Object result) {
		String logTemplate = "\n请求开始---URL: {}, Method: {}, Params: {} \n请求方法---ClassName: {}, [Method]: {}, execution time: {}ms \n请求结束---Result: {}";
		log.info(logTemplate, request.getRequestURL(), request.getMethod(), joinPoint.getArgs(), joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName(), (System.currentTimeMillis() - START_TIME_MILLIS.get()), JSON.toJSONString(result));
		START_TIME_MILLIS.remove();
	}

	/**
	 * 异常通知
	 */
	@AfterThrowing(value = "controllerMethodPointcut()", throwing = "ex")
	public void afterThrowing(JoinPoint joinPoint, Throwable ex) {
		String logTemplate = "--------------- 执行失败 ---------------\n异常请求开始---Send Request URL: {}, Method: {}, Params: {} \n异常请求方法---ClassName: {}, [Method]: {}, execution time: {}ms \n异常请求结束---Exception Message: {}";
		log.error(logTemplate, request.getRequestURL(), request.getMethod(), joinPoint.getArgs(), joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName(), (System.currentTimeMillis() - START_TIME_MILLIS.get()), ex.getMessage());
		START_TIME_MILLIS.remove();
	}

	/**
	 * 最终通知
	 */
	@After("controllerMethodPointcut()")
	public void after(JoinPoint joinPoint) {
	}

}