优雅的统计一段代码执行时间

使用google 的Stopwatch

Stopwatch stopwatch = Stopwatch.createStarted();
   doSomething();
   stopwatch.stop(); // optional
   long millis = stopwatch.elapsed(MILLISECONDS);
   log.info("time: " + stopwatch); // formatted string like "12.3 ms"

其实spring本身也是提供的.

StopWatch stopWatch = new StopWatch("任务耗时秒表工具");

        stopWatch.start("task1");
        Thread.sleep(1000);
        stopWatch.stop();
        System.out.println(stopWatch.getTotalTimeMillis());
        stopWatch.start("task2");
        Thread.sleep(3000);
        stopWatch.stop();
        //所有任务耗时时间
        System.out.println(stopWatch.getTotalTimeMillis());
        System.out.println(stopWatch.prettyPrint());

        StopWatch stopWatch2 = new StopWatch("任务耗时秒表工具2");
        stopWatch2.start("task3");
        Thread.sleep(3000);
        stopWatch2.stop();
        //所有任务耗时时间
        System.out.println(stopWatch2.getTotalTimeMillis());
        System.out.println(stopWatch2.prettyPrint());