Java 实现倒计时功能（由秒计算天、小时、分钟、秒）

有时候会要求实现这样一个需求：

天、小时、分钟、秒的数值都是隔开的，服务器端只返回一个时间戳长度。

以下就是我的实现方案，力求减少对象生成、减小计算量：

import java.util.timer; 
import java.util.timertask; 
public class countdownutils { 
 private static long day = 0; 
 private static long hour = 0; 
 private static long minute = 0; 
 private static long second = 0; 
 private static boolean daynotalready = false; 
 private static boolean hournotalready = false; 
 private static boolean minutenotalready = false; 
 private static boolean secondnotalready = false; 
 public static void main(string[] args) { 
 long totalseconds = 60 * 60 * 24 * 34 + 21; 
 initdata(totalseconds); 
 new timer().schedule(new timertask() { 
  public void run() { 
  if (secondnotalready) { 
   startcount(); 
  } else { 
   cancel(); 
  } 
  } 
 }, 0, 1000); 
 } 
 /** 
 * 初始化赋值 
 * 
 * @param totalseconds 
 */ 
 private static void initdata(long totalseconds) { 
 resetdata(); 
 if (totalseconds > 0) { 
  secondnotalready = true; 
  second = totalseconds; 
  if (second >= 60) { 
  minutenotalready = true; 
  minute = second / 60; 
  second = second % 60; 
  if (minute >= 60) { 
   hournotalready = true; 
   hour = minute / 60; 
   minute = minute % 60; 
   if (hour > 24) { 
   daynotalready = true; 
   day = hour / 24; 
   hour = hour % 24; 
   } 
  } 
  } 
 } 
 system.out.println("初始格式化后——>" + day + "天" + hour + "小时" + minute 
  + "分钟" + second + "秒"); 
 } 
 private static void resetdata() { 
 day = 0; 
 hour = 0; 
 minute = 0; 
 second = 0; 
 daynotalready = false; 
 hournotalready = false; 
 minutenotalready = false; 
 secondnotalready = false; 
 } 
 /** 
 * 计算各个值的变动 
 * 
 */ 
 public static void startcount() { 
 if (secondnotalready) { 
  if (second > 0) { 
  second--; 
  if (second == 0 && !minutenotalready) { 
   secondnotalready = false; 
  } 
  } else { 
  if (minutenotalready) { 
   if (minute > 0) { 
   minute--; 
   second = 59; 
   if (minute == 0 && !hournotalready) { 
    minutenotalready = false; 
   } 
   } else { 
   if (hournotalready) { 
    if (hour > 0) { 
    hour--; 
    minute = 59; 
    second = 59; 
    if (hour == 0 && !daynotalready) { 
     hournotalready = false; 
    } 
    } else { 
    if (daynotalready) { 
     day--; 
     hour = 23; 
     minute = 59; 
     second = 59; 
     if (day == 0) { 
     daynotalready = false; 
     } 
    } 
    } 
   } 
   } 
  } 
  } 
 } 
 system.out.println("距离截止日期还有——>" + day + "天" + hour + "小时" + minute 
  + "分钟" + second + "秒"); 
 } 
} 

总结

以上所述是小编给大家介绍的java 实现倒计时功能（由秒计算天、小时、分钟、秒），希望对大家有所帮助