//日历源代码import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import java.util.Scanner;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;public class Calendar1 {        public  void show(String temp){        Date d = new Date();          SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");           String dateNowStr = sdf.format(d);           if(temp==null) temp=dateNowStr;         calen(temp);    }    public static  void calen(String temp) {         DateFormat format=new SimpleDateFormat("yyyy-MM-dd");            try {                Date date=format.parse(temp);                            Calendar calendar=new GregorianCalendar();                calendar.setTime(date);                int day=calendar.get(calendar.DATE)-1;                calendar.set(calendar.DATE, 1);                int oneday=calendar.get(calendar.DAY_OF_WEEK);                                                int maxDay=calendar.getActualMaximum(calendar.DATE);                System.out.println(temp);                                System.out.println("日\t一\t二\t三\t四\t五\t六");                                for(int j=0;j<oneday-1;j++)                    System.out.print(" \t");                for (int i = 0; i < maxDay; i++) {                    if(i==day){                        System.out.print("*");                    }                    System.out.print(i+1+"\t");                                        int w=calendar.get(calendar.DAY_OF_WEEK);                    if(w==calendar.SATURDAY)System.out.println();                    calendar.add(calendar.DATE, 1);                }                            } catch (ParseException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }                }            public static void main(String[] args) {        Calendar1 test1=new Calendar1();        test1.show(null);        while(true){        System.out.println("\n请输入日期：（格式）XXXX-XX-XX");        Scanner scanner=new Scanner(System.in);        String inputstr= scanner.nextLine();        System.out.println(inputstr);        if(inputstr.matches("^[0-9]{4}-(((0[13578]|(10|12))-(0[1-9]|[1-2][0-9]|3[0-1]))|(02-(0[1-9]|[1-2][0-9]))|((0[469]|11)-(0[1-9]|[1-2][0-9]|30)))$"))        test1.show(inputstr);        else System.out.println("输入错误，请重新输入");}                    }}