给定一个日期，求该日期的前一天和后一天（Java中日期类的用法）

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参考：http://www.cnblogs.com/Johness/archive/2012/09/01/2666163.html

Java中的日期处理

public String getNextDay(String specialDate) {Date utilDate = null;try{utilDate = new SimpleDateFormat("yyyyMMdd").parse(specialDate);} catch (ParseException e) {e.printStackTrace();}Calendar cl = Calendar.getInstance();cl.setTime(utilDate);int day = cl.get(Calendar.DATE);System.out.println("getNextDay:" + day);cl.set(Calendar.DATE, day + 1);String nextDay = new SimpleDateFormat("yyyyMMdd").format(cl.getTime());return nextDay;}public String getBeforeDay(String specialDate){Calendar cl = Calendar.getInstance();Date utilDate = null;try {utilDate = new SimpleDateFormat("yyyyMMdd").parse(specialDate);} catch (ParseException e) {e.printStackTrace();}cl.setTime(utilDate);int day = cl.get(Calendar.DATE);System.out.println("getBeforeDay: " + day);cl.set(Calendar.DATE, day - 1);String beforeDay = new SimpleDateFormat("yyyyMMdd").format(cl.getTime());return beforeDay;}@Testpublic void test(){Scanner sc = new Scanner(System.in);String specialDate = sc.nextLine();System.out.println(getNextDay(specialDate));System.out.println(getBeforeDay(specialDate));}

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