Question

Java根据日期得到当月第几周

请给下注释，谢谢

Answer 1

Calendar c_begin = Calendar.getInstance();
Calendar c_end = Calendar.getInstance();
c_begin.set(2010, 3, 1); //Calendar的月从0-11，所以4月是3.
c_end.set(2010, 4, 20); //Calendar的月从0-11，所以5月是4.

int count = 0;
while(c_begin.before(c_end)){
//System.out.println(new java.sql.Date(c_begin.getTime().getTime()));
if(c_begin.get(Calendar.DAY_OF_WEEK)==Calendar.MONDAY){
count++;
}
if(count == 2){
System.out.println(c_begin.get(Calendar.YEAR)+"年"+(c_begin.get(Calendar.MONTH)+1)+"月"+c_begin.get(Calendar.DATE)+"日");
break;
}

c_begin.add(Calendar.DAY_OF_YEAR, 1);
}

可以这样试试，应该能理解吧。如有不懂再问我

追问

这个好像是选取一段时间中的第几周的起末日期哦，下面是得到当月第几周的：

追答

哦！你这个简单些啊，我也学了知识了 呵呵

Answer 2

String dateString = "2013-07-28";

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = sdf.parse(dateString);

Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int weekOfMonth = calendar.get(Calendar.WEEK_OF_MONTH);
System.out.println(weekOfMonth);