万年历小程序 In java

最近想到大学期间写的一个万年历小程序，写出来之后还很自豪。现在想想当时的程序逻辑混杂，结构紊乱，就在空闲时间重新写了个。本来以为二十多分钟就能写好了，结果写了一个多小时。。拿出来给我sdu大一的学弟学妹们参考一下吧。

 

ps：没有加入输入异常的处理，即默认输入正确的年份格式，如：2000。另外，最早查询年份到（含）1950年。

package JustForFun;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class JustForTest {
    public static void main(String argus[]) throws IOException {
        int year, count = 1, month = 1, index;
        System.out.println("输入你想查询的年份，我将输出这一年的日历，嘿嘿");
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                System.in));
        year = Integer.valueOf(reader.readLine());
        System.out.println(year + "年的日历：");
        index = spaceCount(year)+1;
        while (month <= 12) {
            System.out.println(month + "月：");
            System.out.println("周日 周一 周二 周三 周四 周五 周六");
            printSpace(index - 1);
            while (count <= daysMonth(month, year)) {
                if (count < 10)
                    System.out.print(count + "    ");
                else System.out.print(count + "   ");
                index++;
                count++;
                if (index == 8) {
                    index = 1;
                    System.out.println();
                }
            }
            if (index != 1)
                System.out.println();
            count = 1;
            month++;
        }
    }
    //计算year的i月有多少天
    private static int daysMonth(int i, int year) {
        int[] month31 = {1, 3, 5, 7, 8, 10, 12};
        int[] month30 = {4, 6, 9, 11};
        for (int l = 0; l < month31.length; l++) {
            if (i == month31[l])
                return 31;
        }
        for (int l = 0; l < month30.length; l++) {
            if (i == month30[l])
                return 30;
        }
        if (daysCount(year) == 365)
            return 28;
        return 29;
    }
    //每个月从周几开始
    private static void printSpace(int count) {
        for (int i = 0; i < count; i++)
            System.out.print("     ");
    }
    //计算year有多少天
    private static int daysCount(int year) {
        if (year % 400 == 0)
            return 366;
        if (year % 100 == 0)
            return 365;
        if (year % 4 == 0)
            return 366;
        return 365;
    }
    //输入年份的一月从周几开始
    private static int spaceCount(int year) {
        int years = year - 1950;
        int days = 0;
        for (int i = 0; i < years; i++) {
            days += daysCount(1950 + i);
        }
        return days % 7;
    }
}

 

评论

5 楼 yunshu321 2012-10-22  

cs6641468 写道

借组Calendar类，五分钟就可以了

如四楼嘛？其实也不是简单多少吧。。亲来写个试试

4 楼 dts228 2012-10-11  

public static void main(String argus[]) throws IOException  {
System.out.println("输入年：");
BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
String in = r.readLine();
Calendar c = Calendar.getInstance();
int inYear = Integer.parseInt(in);
c.set(Calendar.YEAR, inYear);
int day = 1;
int lastMouth = 0;
while (true) {
c.set(Calendar.DAY_OF_YEAR, day++);
if (c.get(Calendar.YEAR) > inYear) {
break;
}
int month = c.get(Calendar.MONTH) + 1;
int monthDay = c.get(Calendar.DAY_OF_MONTH);
int week = c.get(Calendar.DAY_OF_WEEK);
if (lastMouth != month) {
System.out.println();
System.out.println(month + "月");
System.out.println("周日 周一 周二 周三 周四 周五 周六");
lastMouth = month;
}
if(monthDay == 1){
for (int i = 0; i < (week-1) % 7; i++) {
System.out.print("    ");
}
}
if (monthDay < 10) {
System.out.print("   "+monthDay);
} else {
System.out.print("  "+ monthDay);
}
if(week % 7 == 0){
System.out.println();
}
}
}

3 楼 hellostory 2012-10-11  

使用Calendar可以减少很多代码，而且也容易很多！

2 楼 cs6641468 2012-10-11  

借组Calendar类，五分钟就可以了

1 楼 闪闪4521 2012-10-11  

干嘛要在main里面写那么多东西呢？