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java根据日期计算星期几

maxliu911 2012-02-15 12:56:06

java根据日期计算星期几

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11 条回复

切换为时间正序

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suihongri 2013-12-16

貌似有个基姆拉尔森公式哦！

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ilovefzq 2012-02-20

package ason;

import java.util.*;
public class TestDemo
{
public static void main(String[] args)
{

Calendar calendar = Calendar.getInstance();//获得一个日历

calendar.add(calendar.DAY_OF_WEEK, +0);
int number = calendar.get(Calendar.DAY_OF_WEEK);//星期表示1-7，是从星期日开始，
String [] str = {"","星期日","星期一","星期二","星期三","星期四","星期五","星期六",};
System.out.println(str[number]);
}
}
，这个代码还行啊，我测试了一下是好使的啊

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ljfolo59 2012-02-20

貌似是类似万年历的程序

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lavender975 2012-02-20

public static final String[] weeks = { "星期日","星期一", "星期二", "星期三", "星期四", "星期五", "星期六", };
Calendar c = Calendar.getInstance();
int day=c.get(Calendar.DAY_OF_WEEK)-1;

int[]weekcount=new int[5];
for (int i = 0; i < weekcount.length; i++) {
if (day<=6) {
weekcount[i]=day;
day++;
}else{
day--;
day=6-day;
weekcount[i]=day;
day++;
}
}

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wwj13141988 2012-02-18



import java.util.Calendar;

import java.util.Date;



public class TestWeekDay

{

	public static void main(String[] args) 

	{

		Calendar calendar = Calendar.getInstance();

		

		int year = 201;

		int month = 10;

		int date = 16;

		calendar.set(year,month-1,date);

		int number = calendar.get(Calendar.DAY_OF_WEEK)-1;

		//if(number < 0) number = 0 ;

		String[] str = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六",};

		System.out.println(str[number]);

	} 

}

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hongkiton 2012-02-18

如果只是简单的使用直接查API就行了下面是自己写的根据日期求星期几类



//Calculating what date the day the user input, which start with 1st January ,1980(Tuesday).

// 2010-8-28 





import java.util.*;

import java.io.*;

import java.text.*;



public class CalculateWeekDay {

	

	private static BufferedReader  stdIn =

        new BufferedReader(new  InputStreamReader(System.in));

        

  private static PrintWriter  stdOut =

        new PrintWriter(System.out, true);



  private static PrintWriter  stdErr =

        new PrintWriter(System.err, true);



	public static void main(String[] args) throws Exception {

		

		/**Date inputDate = new Date();

		

		SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");          //格式化日期

		

		System.out.println(f.format(inputDate));

		

		String str = f.format(inputDate);*/

		

		System.out.print("Please input the date: ");

		

		stdErr.flush();

		

		String str = stdIn.readLine();

		

		String str1[] = str.split("-");                              //分隔日期字符串

		

		int year = Integer.parseInt(str1[0]);

		

		int month = Integer.parseInt(str1[1]);

		

		int day = Integer.parseInt(str1[2]);

		

		int total,week,i;

		

		boolean leap = false;

    

    leap = (year%400 ==  0) | (year%100 != 0) & (year%4 == 0);    //判断当年是否是瑞年	

    

    week = 1;               //起始日1979-12-31是monday

    

    total = year - 1980 +(year - 1980 + 3)/4;                //计算total的初值

    

    //计算当年前几月的累计天数与total的初值之和

    

    for(i = 1; i <= month - 1; i++) {

    	

    	switch(i) {

    		

    		case 1:

    		

    		case 3:

    		

    		case 5:

    		

    		case 7:

    		

    		case 8:

    		

    		case 10:

    		

    		case 12:

    		

    		total += 31;

    		

    		break;

    		

    		case 4:

    		

    		case 6:

    		

    		case 9:

    		

    		case 11:

    		

    		total += 30;

    		

    		break;

    		

    		case 2:

    		

    		if(leap)

    				total += 29;

    	  

    	  else

    	  		total += 28;

    	  

    	  break;

    		

    		}

    	

    	} 

    	

    	total = total + day;                 //将本月天数加上

    	

    	week = (week + total)%7;

    	

    	System.out.print("today " + year + "-" + month + "-" +day + " is ");

    	stdErr.flush();

    	

    	switch(week) {

    	

    	case 0:

    	      System.out.println("Sunday");

    	      break;

    	      

      case 1:

            System.out.println("Monday");

    	      break;

    	      

    	case 2:

    	      System.out.println("Tuestay");

    	      break;

    	      

      case 3:

            System.out.println("Wednesday");

    	      break;

    	      

    	case 4:

    	      System.out.println("Thursday");

    	      break;

    	      

    	case 5:

    	      System.out.println("Friday");

    	      break;

    	      

    	case 6:

    	      System.out.println("Saturday");

    	      break;

    	

    	}

     

		}

		

	}

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interceptor2012 2012-02-16

有bug

[Quote=引用 3 楼 monghuan 的回复:]
Java code

import java.util.*;
class TestDemo
{
public static void main(String[] args)
{
int year = 2012;
int month = 2;
int day = 15;
Calendar calendar =……
[/Quote]

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脉动 2012-02-16

什么情况呢，

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脉动 2012-02-15



import java.util.*;

class TestDemo

{

	public static void main(String[] args)

	{

		int year = 2012;

		int month = 2;

		int day = 15;

    Calendar calendar = Calendar.getInstance();//获得一个日历

    calendar.set(year, month-1, day);//设置当前时间,月份是从0月开始计算

    int number = calendar.get(Calendar.DAY_OF_WEEK);//星期表示1-7，是从星期日开始，   

    String [] str = {"","星期日","星期一","星期二","星期三","星期四","星期五","星期六",};

    System.out.println(str[number]);

	}	

}