java获取当天是当年的第几周

import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;public class GetWeek { /**  * @param args  */ public static void main(String[] args) {  System.out.println(getWeek(new Date())); } public static int getWeek(Date date) {  GregorianCalendar g = new GregorianCalendar();  g.setTime(date);  return g.get(Calendar.WEEK_OF_YEAR);//获得周数 }}