SpringBoot之统计接口执行耗时

实现功能：使用AOP统计方法执行耗时

Maven依赖：

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

自定义注解（加上该注解的方法系统自动统计耗时）：

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

/**
 * 统计耗时
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface TakeTime {

}

TakeTimeAspect（使用AOP技术统计方法执行前后消耗时间）：

import com.alibaba.fastjson.JSON;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * 耗时统计
 */
@Aspect
@Component
public class TakeTimeAspect {

    private static final Logger logger = LoggerFactory.getLogger(TakeTimeAspect.class);


    //统计请求的处理时间
    ThreadLocal<Long> startTime = new ThreadLocal<>();

    /**
     * 带有@TakeTime注解的方法
     */
    @Pointcut("@annotation(com.emi2c.mybatis.config.annotation.TakeTime)")
    public void log() {

    }

    @Before("log()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        startTime.set(System.currentTimeMillis());
        //接收到请求，记录请求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        //记录请求的内容
        logger.info("请求URL:" + request.getRequestURL().toString());
        logger.info("请求METHOD:" + request.getMethod());
    }

    @AfterReturning(returning = "ret", pointcut = "log()")
    public void doAfterReturning(Object ret) {
        //处理完请求后，返回内容
        logger.info("方法返回值:" + JSON.toJSONString(ret));
        logger.info("方法执行时间:" + (System.currentTimeMillis() - startTime.get()));
    }
}

使用示例：

@TakeTime
    @RequestMapping(value = "/test", method = RequestMethod.GET)
    public List<User> findAll() {
        List<User> userList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            User user = new User();
            user.setUsername("user" + i);
            user.setPassword("password" + i);
            userList.add(user);
        }
        return userList;
    }