java统计耗时的方式

• spring 提供 stopWatch 来进行统计耗时

package com.kuangsheng.test;


import org.springframework.util.StopWatch;


public class TestMain {
    public static void main(String[] args) throws InterruptedException {
        StopWatch sw = new StopWatch("spring 耗时工具");
        sw.start("开始任务");
        Thread.sleep(2000);
        sw.stop();
        System.out.println("输出耗时："+sw.getLastTaskTimeMillis());
        System.out.println("输出名字："+sw.getLastTaskName());

    }
}