简单日历

 //----------------------------------日历表
  2
  3
  4 import java.util.*;
  5 import java.text.*;
  6
  7 class Menology
  8 {
  9         //----------------计算当前日期距离1900的天数
 10         public long lastDays(String startDay,String seachDay){
 11
 12             long lastDays = 0;
 13             SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM");
 14             try{
 15
 16                 Date STD = SDF.parse(startDay);
 17                 Date SED = SDF.parse(seachDay);
 18                 lastDays = (SED.getTime() - STD.getTime()) / (24*60*60*1000);
 19             }catch (ParseException pe){
 20
 21                 pe.printStackTrace();
 22             }
 23             return lastDays;
 24         }
 25
 26     //------------------确定每个月的天数
 27
 28
 29     //--------------------------打印日历表的格式
 30     public void MenologyTab(long week , int day){
 31
 32         System.out.println("星期日\t星期一\t星期二\t星期三\t星期四\t星期五\t星期六");
 33
 34         //-------日期天数计数
 35         int number = 0;
 36         for(int i = 0; i < 36; i++){
 37
 38                 if (i  % 7 == 0 && i != 0){
 39
 40                     System.out.println();
 41                 }
 42
 43             // 大于返回的日期后num计数，打印整月天数排版
 44             if(i >= (int)week && i < day + (int)week){
 45
 46                     number++;
 47                     System.out.print(number + "\t");
 48             }else {
 49
 50                 System.out.print("(>_<)\t");
 51             }
 52         }
 53     }
 54
 55
 56     //计算每个月的天数
 57     public int mounth(String mouth,String year){
 58
 59             if(mouth.equals("1") || mouth.equals("3") || mouth.equals("5") || mouth.equals("7") || mouth.equals("8") || mouth.equals("10") || mouth.equals("12")){
 60
 61                 return 31;
 62             }else if(mouth.equals("4") || mouth.equals("6") || mouth.equals("9") || mouth.equals("11")){
 63
 64                 return 30;
 65             }else if(mouth.equals("2")){
 66
 67                     //------计算平年闰年
 68                     int years = Integer.parseInt(year);
 69                     if ((years % 4 == 0 && years % 100 != 0) || years % 400 == 0){
 70
 71                         return 29;
 72                     }else{
 73
 74                         return 28;
 75                     }
 76             }
 77             return 0;
 78     }
 79 }
 80
 81 class  Dater
 82 {
 83     public static void main(String[] args)
 84     {
 85         //-----日历管理对象
 86         Menology menology = new Menology();
 87
 88         System.out.println("\n*******************************");
 89         System.out.println("**********日历表查询***********");
 90         System.out.println("*******************************\n");
 91         System.out.println("请输入你要查询的日期：");
 92         System.out.println("--------------------------------------------------------");
 93         Scanner keyInput = new Scanner(System.in);
 94         String keyDate = keyInput.next();
 95
 96         //-----取出年份
 97         String year =  keyDate.substring(0,4);
 98
 99         //------取出月份
100         String mouth =  keyDate.substring(5);

  menology.mounth(mouth,year);
102
103         //------计算天数
104         long Times = menology.lastDays("1900-1",keyDate);
105         System.out.println("--------------------------------------------------------");
106
107         //-----传参进打印表格的方法
108         menology.MenologyTab(Times % 7 + 1,menology.mounth(mouth,year));
109     }
11