如何检查给定的时间戳是周末？

Question

任何人都可以帮助我在Java中完成这个功能吗？谢谢

// e.g. "20130218001203638" 
boolean isWeekend(String date) 
{ 
    ... ... 
} 

找到一个帖子给出我想要的确切答案。

Check A Date String If Weekend In Java

Answer 1

Calendar#get(DAY_OF_WEEK)它返回值周日，周一，...

你可以只用有条件检查Calendar.SATURDAY or Calendar.SUNDAY。

Answer 2

正如日期计算是令人厌烦的

SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd"); 
Date d = df.parse(date); 
Calendar cal = Calendar.getInstance(); 
cal.setTime(d); 
int wday = cal.get(Calendar.DAY_OF_WEEK); 
return wday == Calendar.SATURDAY || wday == Calendar.SUNDAY; 

Answer 3

像这样的东西应该有所帮助：

boolean isWeekend = false; 
Date date = new Date(); 
//assuming your date string is time in long format, 
//if not then use SimpleDateFormat class 
date.setTime(Long.parseLong("20130218001203638")); 
Calendar calendar = new GregorianCalendar(); 
calendar.setTime(date); 

if(calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || 
     calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY){ 
    isWeekend = true; 
} 
return isWeekend;