public class MyInterceptor implements HandlerInterceptor {

  /**
   * preHandle在執(zhí)行Controller之前執(zhí)行，返回true，則繼續(xù)執(zhí)行Contorller
   * 返回false則請(qǐng)求中斷。
   */
  @Override
  public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o)
      throws Exception {
    //只有返回true才會(huì)繼續(xù)向下執(zhí)行，返回false取消當(dāng)前請(qǐng)求 
    long startTime = System.currentTimeMillis();
    httpServletRequest.setAttribute("startTime", startTime);
    return true;
  }

  /**
   * postHandle是在請(qǐng)求執(zhí)行完，但渲染ModelAndView返回之前執(zhí)行
   */
  @Override
  public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o,
      ModelAndView modelAndView) throws Exception {
    long startTime = (Long) httpServletRequest.getAttribute("startTime");
    long endTime = System.currentTimeMillis();
    long executeTime = endTime - startTime;
    StringBuilder sb = new StringBuilder(1000);
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String date = simpleDateFormat.format(new Date());
    sb.append("-----------------------").append(date).append("-------------------------------------\n");
    sb.append("URI    : ").append(httpServletRequest.getRequestURI()).append("\n");
    sb.append("CostTime : ").append(executeTime).append("ms").append("\n");
    sb.append("-------------------------------------------------------------------------------");
    System.out.println(sb.toString());
  }

  /**
   * afterCompletion是在整個(gè)請(qǐng)求執(zhí)行完畢后執(zhí)行
   */
  @Override
  public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,
      Object o, Exception e) throws Exception {
  }

}

/**
 * 繼承WebMvcConfigurationSupport繼承并重寫(xiě)addInterceptor方法用于注冊(cè)攔截器
 * WebMvcConfigureAdapter已經(jīng)過(guò)時(shí)了??！
 */
@Configuration
public class RegisterInterceptor extends WebMvcConfigurationSupport {
  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
    super.addInterceptors(registry);
  }
}

  public void crossDomain(HttpServletRequest request, HttpServletResponse response) {
    response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
    response.setHeader("Access-Control-Allow-Credentials", "true");
  }

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
      throws Exception {
    crossDomain(request, response);
    long startTime = System.currentTimeMillis();
    request.setAttribute("startTime", startTime);
    return true;
  }