基于拦截器的http请求前后监听工具

1. 自定义一个拦截器，关键在HandlerInterceptorAdapter

import com.mmall.util.JsonMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

@Slf4j
public class HttpInterceptor extends HandlerInterceptorAdapter {

    private static final String START_TIME = "requestStartTime";

    /**
     * 请求前
     * @param request
     * @param response
     * @param handler
     * @return  true表示请求前都是ok的
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String url = request.getRequestURI().toString();
        Map parameterMap = request.getParameterMap();
        log.info("request start. url:{}, params:{}", url, JsonMapper.obj2String(parameterMap));
        long start = System.currentTimeMillis();
        //计算请求开始到结束耗费的时间
        request.setAttribute(START_TIME, start);
        return true;
    }

    /**
     * 正常请求会调用
     * 场景：
     * 1.输出每次的请求信息
     * 2.监控某个方法耗费事件
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//        String url = request.getRequestURI().toString();
//        long start = (Long) request.getAttribute(START_TIME);
//        long end = System.currentTimeMillis();
//        log.info("request finished. url:{}, cost:{}", url, end - start);
        removeThreadLocalInfo();
    }

    /**
     * 正常和异常都会调用即100%调用
     * @param request
     * @param response
     * @param handler
     * @param ex
     * @throws Exception
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        String url = request.getRequestURI().toString();
        long start = (Long) request.getAttribute(START_TIME);
        long end = System.currentTimeMillis();
        log.info("request completed. url:{}, cost:{}", url, end - start);

        removeThreadLocalInfo();
    }

    public void removeThreadLocalInfo() {
        RequestHolder.remove();;
    }
}

2. 注册