通常的时间监控方式
//方法运行开始
long start = System.currentTimeMillis();
do.something();
long end = System.currentTimeMillis();
log.info("某业务的耗时：" + start-end);



stopWatch方式
StopWatch sw = new StopWatch("test");
 sw.start("task1");

 do.something();
 sw.stop();
 sw.start("task2");

 do.something();
 sw.stop();

System.out.println(sw.prettyPrint());

//运行结果

-----------------------------------------
ms % Task name
-----------------------------------------
00948 100% task1

-----------------------------------------
ms % Task name
-----------------------------------------
00948 100% task2