Java | 使用 StopWatch 优雅打印执行耗时

import org.springframework.util.StopWatch;  
public class SpringStopWatchExample {  
    public static void main (String[] args) throws InterruptedException {  
        StopWatch sw = new StopWatch();  
        sw.start();  
        //long task simulation  
        Thread.sleep(1000);  
        sw.stop();  
        System.out.println(sw.getTotalTimeMillis());  
    }  
}

public class SpringStopWatchExample2 {  
    public static void main (String[] args) throws InterruptedException {  
        StopWatch sw = new StopWatch();  
        sw.start("A");//setting a task name  
        //long task simulation  
        Thread.sleep(1000);  
        sw.stop();  
        System.out.println(sw.getLastTaskTimeMillis());  
    }  
}

import org.springframework.util.StopWatch;  
public class SpringStopWatchExample3 {  
    public static void main (String[] args) throws InterruptedException {  
        StopWatch sw = new StopWatch();  
        sw.start("A");  
        Thread.sleep(500);  
        sw.stop();  
        sw.start("B");  
        Thread.sleep(300);  
        sw.stop();  
        sw.start("C");  
        Thread.sleep(200);  
        sw.stop();  
        System.out.println(sw.prettyPrint());  
    }  
}

StopWatch '': running time (millis) = 1031  
-----------------------------------------  
ms     %     Task name  
-----------------------------------------  
00514  050%  A  
00302  029%  B  
00215  021%  C:

@Override  
public long nextSeq(String name) {  
    StopWatch watch = new StopWatch();  
    watch.start("单序列获取总消耗");  
    long sequence = generator.generateId(name);  
    watch.stop();  
    logger.info(watch.prettyPrint());  
    return sequence;  
}