【Java】时间戳转耗时时长

一、方法

1、代码

2、使用示例

二、工具类

1、代码

2、使用示例

三、项目地址

1、GitHub

2、Gitee

一、方法

1、代码

java">public static String convert(long timestamp) {if (timestamp <= 0) {return "0s";}long oneSecond = 1000;long oneMinute = 60 * oneSecond;long oneHour = 60 * oneMinute;long oneDay = 24 * oneHour;int d = 0;int h = 0;int m = 0;int s = 0;String result = "";if (timestamp >= oneDay) {d = (int) (timestamp / oneDay);result += d + "d";}timestamp -= d * oneDay;if (timestamp >= oneHour) {h = (int) (timestamp / oneHour);result += h + "h";}timestamp -= h * oneHour;if (timestamp >= oneMinute) {m = (int) (timestamp / oneMinute);result += m + "m";}timestamp -= m * oneMinute;if (timestamp >= oneSecond) {s = (int) (timestamp / oneSecond);result += s + "s";}timestamp -= s * oneSecond;if (timestamp > 0) {result += timestamp + "ms";}return result;
}

2、使用示例

java">public static void main(String[] args) throws InterruptedException {long startTime = System.currentTimeMillis();// 模拟业务代码运行时间Thread.sleep(500);long endTime = System.currentTimeMillis();System.out.println(convert(endTime - startTime));
}

java">public static void main(String[] args) throws InterruptedException {long startTime = System.currentTimeMillis();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");System.out.println("[开始时间] " + sdf.format(startTime));// 模拟业务代码运行时间Thread.sleep(500);long endTime = System.currentTimeMillis();System.out.println("[结束时间] " + sdf.format(endTime));System.out.println("[运行时间] " + convert(endTime - startTime));
}

二、工具类

如果需要在多处使用，并且开始时间和结束时间都要打印，会有点繁琐。为了便捷使用，设置了一个工具类。

1、代码

java">
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;/*** Print time-consuming(eg: 1h23m20s50ms). <br/>* -step1: addStartTime() <br/>* -step2: addEndTime() <br/>* -step3: print() <br/>* Steps 1 to 3 are a set of operations that can be looped. Calling addStartTime() and addEndTime()* will print the current time in the format of "yyyy-MM-dd HH:mm:ss.S". The method addStartTime()* and addEndTime() must match each other, otherwise output NULL.*/
public class TimeConsume {private final static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");private final List<Long> startTime;private final List<Long> endTime;private int point;public TimeConsume() {this.startTime = new ArrayList<>();this.endTime = new ArrayList<>();this.point = 0;}/**** Print current time(simple date format is "yyyy-MM-dd HH:mm:ss.S") and add current time to* startTime.*/public void addStartTime() {long currentTimeMillis = System.currentTimeMillis();System.out.println("[start time] " + sdf.format(currentTimeMillis));this.startTime.add(currentTimeMillis);}/**** Print current time(simple date format is "yyyy-MM-dd HH:mm:ss.S") and add current time to* endTime.*/public void addEndTime() {long currentTimeMillis = System.currentTimeMillis();System.out.println("[end time] " + sdf.format(currentTimeMillis));this.endTime.add(currentTimeMillis);}/**** Print time-consuming(eg: 1h23m20s50ms). If the start time and end time do not match each* other, output empty. This method can be reused.*/public void print() {try {System.out.println("[time-consuming] "+ convert(this.endTime.get(point) - this.startTime.get(point)));} catch (Exception e) {System.out.println("[time-consuming] NULL");}this.point++;}/**** timestamp convert to time-consuming* * @param timestamp long timestamp* @return time-consuming string, eg: 1d, 12h32m45s123ms, 1h23m20s50ms, 5min2s, 10s, 520ms*/public String convert(long timestamp) {if (timestamp <= 0) {return "0s";}long oneSecond = 1000;long oneMinute = 60 * oneSecond;long oneHour = 60 * oneMinute;long oneDay = 24 * oneHour;int d = 0;int h = 0;int m = 0;int s = 0;String result = "";if (timestamp >= oneDay) {d = (int) (timestamp / oneDay);result += d + "d";}timestamp -= d * oneDay;if (timestamp >= oneHour) {h = (int) (timestamp / oneHour);result += h + "h";}timestamp -= h * oneHour;if (timestamp >= oneMinute) {m = (int) (timestamp / oneMinute);result += m + "m";}timestamp -= m * oneMinute;if (timestamp >= oneSecond) {s = (int) (timestamp / oneSecond);result += s + "s";}timestamp -= s * oneSecond;if (timestamp > 0) {result += timestamp + "ms";}return result;}
}

2、使用示例

java">public static void main(String[] args) throws InterruptedException {TimeConsume tc = new TimeConsume();tc.addStartTime();// 模拟业务代码运行时间Thread.sleep(500);tc.addEndTime();tc.print();// 可多次调用tc.addStartTime();// 模拟业务代码运行时间Thread.sleep(50);tc.addEndTime();tc.print();
}