java-以月为单位,得到一年中某一个月份的范围
简单说:得到某一月份的第一天,第一小时,第一分钟,第一秒和某一月份的最后一天,最后一小时,最后一分钟,最后一秒。
实现:
1 //月初 2 private Date getBeginTimeOfMonth(int year , int month){ 3 Calendar c = Calendar.getInstance(); 4 c.set(Calendar.YEAR,year); 5 c.set(Calendar.MONTH,month-1); 6 c.set(Calendar.DAY_OF_MONTH,1); 7 c.set(Calendar.HOUR_OF_DAY,0); 8 c.set(Calendar.MINUTE,0); 9 c.set(Calendar.SECOND,0); 10 c.set(Calendar.MILLISECOND,0); 11 return c.getTime(); 12 } 13 //月末 14 private Date getEndTimeOfMonth(int year , int month){ 15 Calendar c = Calendar.getInstance(); 16 c.set(Calendar.YEAR,year); 17 c.set(Calendar.MONTH,month-1); 18 int lastDate = c.getActualMaximum(Calendar.DATE); 19 c.set(Calendar.DAY_OF_MONTH,lastDate); 20 c.set(Calendar.HOUR_OF_DAY,23); 21 c.set(Calendar.MINUTE,59); 22 c.set(Calendar.SECOND,59); 23 c.set(Calendar.MILLISECOND,999); 24 return c.getTime(); 25 }
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