java 获取某周的起始和结束日期

public static final Date convertStringToDate(String strDate) throws ParseException { SimpleDateFormat df = null; Date date = null; df = new SimpleDateFormat("yyyy-MM-dd"); try { date = df.parse(strDate); } catch (ParseException pe) { log.error("ParseException: " + pe); } return (date); }public static Calendar getCalendar(String month, int week) {Date newDate = DateUtil.convertStringToDate(month + "-01");Calendar caleNew = Calendar.getInstance();caleNew.setTime(newDate);caleNew.add(Calendar.WEEK_OF_MONTH, week -1 );return caleNew;}/** * 获取某月的第n星期的第一天 * * @param month: 2011-06 * @param week : 2 * @return */public static Date getFirstOfWeek(String month, int week) {Calendar myCale = Calendar.getInstance();try{GregorianCalendar gc = (GregorianCalendar)getCalendar(month, week ) ; //(GregorianCalendar)Calendar.getInstance();myCale.setTime(gc.getTime());myCale.set(Calendar.DATE, gc.get(Calendar.DATE) - gc.get(Calendar.DAY_OF_WEEK) + 2);}catch (Exception e) {log.info(e.getMessage());}return myCale.getTime();}/** * 获取某月的第n星期的最后一天 * * @param month: 2011-06 * @param week: 2 * @return */public static Date getLastOfWeek(String month, int week) {Calendar myCale = Calendar.getInstance();try{GregorianCalendar gc = (GregorianCalendar)getCalendar(month, week ) ; //(GregorianCalendar)Calendar.getInstance();myCale.setTime(gc.getTime());myCale.set(Calendar.DATE, gc.get(Calendar.DATE) + 8 - gc.get(Calendar.DAY_OF_WEEK) );}catch (Exception e) {log.info(e.getMessage());}return myCale.getTime();}