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
 }
}