java中一个月按周划分

发布网友发布时间：2022-04-27 00:22

共1个回答

热心网友时间：2022-06-21 15:40

lz 你好

这个还是比较好实现

具体代码如下(有详细的注释):

import java.util.*;

//月份划分类
public class MonthDivide {
private int year, month;//年份、月份
private int weekend;//周数(第几周)
private int leapYear[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};//闰年每月天数
private int commonYear[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};//平年每月天数
private int start, end;

    //输入
    public void inputData(){
    Scanner in = new Scanner(System.in);

    System.out.print ("输入年份:");
    year = in.nextInt();
    System.out.print ("输入月份:");
    month = in.nextInt();
    //System.out.print ("输入周数:");
    //weekend = in.nextInt();
    }

   //判断闰年
   public boolean isLeapYear(int year){
   return (year%4 == 0 && year%100 != 0) || (year%400 == 0);
   }

    //计算
    public void count(){
    int day, weekday, allDays=0;
    //分别表示当月天数、当月一号是星期几、1900.1.1到当前输入日期之间的天数

    day = isLeapYear(year)?leapYear[month]:commonYear[month];
    if(weekend > (day==28?4:5)){
    System.out.println ("周数越界了!");
    return;
    }

    //计算天数
    for(int i=1900; i<year; i++){
    allDays += isLeapYear(i)?366:365;
    }
    for(int i=1; i<month; i++){
    allDays += isLeapYear(year)?leapYear[i]:commonYear[i];
    }
    //计算星期几
    weekday = 1+allDays%7;

    //计算第weekend周的开始和结束
    if(weekend == 1){
    start = 1;
    end = 8 - weekday;
    }
    else{
    start = (weekend-2)*7 + (9-weekday);
    end = start + 6;
    if(end > day)
    end = day;
    }
    }

    //设置weekend周数
    public void setWeekend(int wk){
    weekend = wk;
    }

    //以下三个是获取属性
    public int getStart(){
    return start;
    }
    public int getEnd(){
    return end;
    }
    public int getWeekend(){
    return weekend;
    }

    //main
    public static void main(String[] args) {
    MonthDivide md = new MonthDivide();

        md.inputData();

    for (int i = 1; i <= 5 ; i++){
    md.setWeekend(i);
    md.count();
    System.out.print ("\n第"+md.getWeekend()+"周开始于"+md.getStart()+"号\t结束至"+md.getEnd()+"号");
    }
    }
}

运行结果:

希望能帮助你哈