package org.xs.demo1;

import java.text.SimpleDateFormat;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.core.NamedThreadLocal;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView; 

/**

 * 日志拦截器

 * @author ThinkGem

 */

public class LogInterceptor implements HandlerInterceptor {
  private final Logger log = LoggerFactory.getLogger(getClass().getName());

  private static final ThreadLocal startTimeThreadLocal = new NamedThreadLocal("ThreadLocal StartTime");
  /** 

   * 预处理

   */

  @Override

  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

     

    long beginTime = System.currentTimeMillis(); //开始时间 

    startTimeThreadLocal.set(beginTime); //线程绑定变量（该数据只有当前请求的线程可见） 

    log.info("开始计时: {}", new SimpleDateFormat("hh:mm:ss.SSS").format(beginTime));

     

    return true;

  }

  /**

   * 返回处理

   */

  @Override

  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    if (modelAndView != null){

      log.info("ViewName: " + modelAndView.getViewName());

    }

  }

  /**

   * 后处理

   */

  @Override

  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    // 保存日志

    //LogUtils.saveLog(request, handler, ex, null);     

    // 输出日志信息

    log.info("访问地址：" + request.getRequestURI() + "，执行方式：" + request.getMethod());

    long beginTime = startTimeThreadLocal.get(); //得到线程绑定的局部变量（开始时间） 

    long endTime = System.currentTimeMillis(); //结束时间 

    log.info("计时结束：{}", new SimpleDateFormat("hh:mm:ss.SSS").format(endTime)); 

  }
}