给定一个日期，计算这个日期所在周的星期一和星期天

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

public class TestWeek {

	private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	
	
	public static void main(String[] args) throws ParseException {
		
		String dateStr = "2011-11-1";
		
		String[] startAndEndDateOfWeek = getWeekStartAndEnd(dateStr);
		System.out.println("本周开始日期是:" + startAndEndDateOfWeek[0]);
		System.out.println("本周结束日期是:" + startAndEndDateOfWeek[1]);
		
		String[] aaa = TimeZone.getAvailableIDs();
		for (String string : aaa) {
//			System.out.println(string);
		}
	}
	
	
	private static String[] getWeekStartAndEnd(String nowDateStr) {
		String[] a = null;
		try {
			Date nowDate = sdf.parse(nowDateStr);
			
			Calendar nowCalendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+08:00"));
//			nowCalendar.setFirstDayOfWeek(Calendar.MONDAY);
			nowCalendar.setTime(nowDate);
			
			//将开始日历和结束日历都初始化为当前选择日期
			Calendar startCalendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+08:00"));
//			startCalendar.setFirstDayOfWeek(Calendar.MONDAY);
			startCalendar.setTime(nowDate);
			
			Calendar endCalendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+08:00"));
//			endCalendar.setFirstDayOfWeek(Calendar.MONDAY);
			endCalendar.setTime(nowDate);
			
			int sourceDayOfWeek = nowCalendar.get(Calendar.DAY_OF_WEEK);
			if(sourceDayOfWeek == Calendar.MONDAY) {//星期一(开始日历不变，结束日历加6天)
				
				endCalendar.add(Calendar.DAY_OF_MONTH, 6);
				
			} else if(sourceDayOfWeek == Calendar.TUESDAY) {//星期二(开始日历减1天，结束日历加5天)
				
				startCalendar.add(Calendar.DAY_OF_MONTH, -1);
				endCalendar.add(Calendar.DAY_OF_MONTH, 5);
				
			} else if(sourceDayOfWeek == Calendar.WEDNESDAY) {//星期三(开始日历减2天，结束日历加4天)
				
				startCalendar.add(Calendar.DAY_OF_MONTH, -2);
				endCalendar.add(Calendar.DAY_OF_MONTH, 4);
				
			} else if(sourceDayOfWeek == Calendar.THURSDAY) {//星期四(开始日历减3天，结束日历加3天)
				
				startCalendar.add(Calendar.DAY_OF_MONTH, -3);
				endCalendar.add(Calendar.DAY_OF_MONTH, 3);
				
			} else if(sourceDayOfWeek == Calendar.FRIDAY) {//星期五(开始日历减4天，结束日历加2天)
				
				startCalendar.add(Calendar.DAY_OF_MONTH, -4);
				endCalendar.add(Calendar.DAY_OF_MONTH, 2);
				
			} else if(sourceDayOfWeek == Calendar.SATURDAY) {//星期六(开始日历减5天,结束日历加1天)
				
				startCalendar.add(Calendar.DAY_OF_MONTH, -5);
				endCalendar.add(Calendar.DAY_OF_MONTH, 1);
				
			} else if(sourceDayOfWeek == Calendar.SUNDAY) {//星期天(开始日历减6天,结束日历不变)
				
				startCalendar.add(Calendar.DAY_OF_MONTH, -6);
				
			} else {
				throw new RuntimeException("The date out of a week...");
			}
			
			a = new String[2];
			System.out.println(startCalendar.getTime());
			a[0] = sdf.format(startCalendar.getTime());
			a[1] = sdf.format(endCalendar.getTime());
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		return a;
	}
	
	
}