这篇文章主要介绍了Spring StopWatch使用实例详解,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
StopWatch简单的秒表，允许多个任务的计时，暴露每个命名任务的总运行时间和运行时间。隐藏使用System.currentTimeMillis（），提高应用程序代码的可读性并减少计算错误的可能性。
以下演示使用StopWatch记录请求摘要日志信息：
@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();
}
}
