Spring StopWatch使用实例详解

@Slf4j
public class PerformanceInteceptor implements HandlerInterceptor {
  private ThreadLocal<StopWatch> stopWatchThreadLocal = new ThreadLocal<>();

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    StopWatch sw = new StopWatch();
    stopWatchThreadLocal.set(sw);
    sw.start();
    return true;
  }

  @Override
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    stopWatchThreadLocal.get().stop();
    stopWatchThreadLocal.get().start();
  }

  @Override
  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    StopWatch sw = stopWatchThreadLocal.get();
    sw.stop();
    String method = handler.getClass().getSimpleName();
    if (handler instanceof HandlerMethod) {
      String beanType = ((HandlerMethod) handler).getBeanType().getName();
      String methodName = ((HandlerMethod) handler).getMethod().getName();
      method = beanType + "." + methodName;
    }
    // sw.getTotalTimeMillis(), 总执行时间
    //sw.getTotalTimeMillis() - sw.getLastTaskTimeMillis(), 执行方法体所需要的时间

    log.info("{};{};{};{};{}ms;{}ms;{}ms", request.getRequestURI(), method,
        response.getStatus(), ex == null ? "-" : ex.getClass().getSimpleName(),
        sw.getTotalTimeMillis(), sw.getTotalTimeMillis() - sw.getLastTaskTimeMillis(),
        sw.getLastTaskTimeMillis());
    stopWatchThreadLocal.remove();
  }
}