calendar怎么獲取不帶時分秒的日期？

import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; public class Test16 { public static void main(String args[]) throws ParseException{ Calendar c = Calendar.getInstance(); DateFormat df = new SimpleDateFormat("yyyy-MM-dd"); long l1=df.parse(df.format(c.getTime())).getTime(); System.out.println(l1); } }