java-calendar

1，获取本月/本年最大天数

Calendar c=Calendar.getInstance()
c.getMaximum(Calendar.DAY_OF_MONTH)

 

2，今天时间段

Calendar c=Calendar.getInstance();
c.set(c.get(Calendar.YEAR),c.get(Calendar.MONTH),c.get(Calendar.DAY_OF_MONTH),0,0,0);
datingTimeBegin=c.getTime();
			
c.set(c.get(Calendar.YEAR),c.get(Calendar.MONTH),c.get(Calendar.DAY_OF_MONTH)+1,0,0,0);
datingTimeEnd=c.getTime();

 

3，本周时间段

Calendar c=Calendar.getInstance();
c.set(c.get(Calendar.YEAR),c.get(Calendar.MONTH),c.get(Calendar.DAY_OF_MONTH),0,0,0);
c.roll(Calendar.DAY_OF_MONTH,-(c.get(Calendar.DAY_OF_WEEK)-2));
datingTimeBegin=c.getTime();
			
c.roll(Calendar.DAY_OF_MONTH, 7);
datingTimeEnd=c.getTime();

 

4，本月时间段

Calendar c=Calendar.getInstance();
c.set(c.get(Calendar.YEAR), c.get(Calendar.MONTH),1,0,0,0);
datingTimeBegin=c.getTime();
			
c.set(c.get(Calendar.YEAR), c.get(Calendar.MONTH)+1,1,0,0,0);
datingTimeEnd=c.getTime();