Question

以下是我用来计算一个月内的周数的代码。但实际上我需要几周的时间，每周的开始日为星期一，结束日为星期日。例如，2012年1月将有5周。但根据上述标准，它将有6周的时间 2012年1月
第一周 - 周日01
第二周 - 周一至周日2日第三周 - 周一至周五9日第四周 - 周一至周日16日至周日第五周 - 周一至周日23日第六周 - 周一至周三30周二。

以下代码仅提供5周。

public class Test { 
    public static void main(String[] args) 
    { 
        Calendar calendar = Calendar.getInstance(); 
        int year = 2012; 
        int month = Calendar.JANUARY; 
        int date = 1; 
        calendar.set(year, month, date); 
        int numOfDaysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); 
        int numOfWeeksInMonth = calendar.getActualMaximum(Calendar.WEEK_OF_MONTH); 
        System.out.println("Number of Days In Month: " + numOfDaysInMonth); 
        System.out.println("Number of Weeks In Month: " + numOfWeeksInMonth);

}

}

上述代码的输出为
月份天数：31
月份周数：5

但我需要得到“月中的周数：”为6 * 此外，我试图以ddMMYYYY格式获取每周的开始日期和结束日期。* 我还在努力。

有人可以帮我解决这个问题吗？

Answer 1

添加此内容以获取"Number of Weeks In Month:" as 6，

calendar.setFirstDayOfWeek(Calendar.MONDAY);

Answer 2

尝试此功能

public static void main(String[] args) {
    System.out.println(getNumberOfWeeks(2012, Calendar.JANUARY));
}

static int getNumberOfWeeks(int year, int month) {
    Calendar c = Calendar.getInstance();
    c.set(Calendar.YEAR, year);
    c.set(Calendar.MONTH, month);
    c.set(Calendar.DAY_OF_MONTH, 1);
    int numOfWeeksInMonth = 1;
    while (c.get(Calendar.MONTH) == month) {
        c.add(Calendar.DAY_OF_MONTH, 1);
        if (c.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY) {
            numOfWeeksInMonth++;
        }
    }
    return numOfWeeksInMonth;
}

Answer 3

试试这个：

public static int noWeeks(int year,int month)
{
     Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, 1);


    int initDay = c.get(Calendar.DAY_OF_WEEK)-1
            ;
    int days =  c.getActualMaximum(Calendar.DAY_OF_MONTH);
    int a = (initDay==0?7:initDay)+days-1;
    return a/7+(a%7==0?0:1);

}

Answer 4

al algoritmocorretoéesseite：

public static int getTotalWeeksOfMonth(int month, int year){

    int monthIndex = month-1;

     Calendar c = Calendar.getInstance();
     c.set(Calendar.YEAR, year);
     c.set(Calendar.MONTH, monthIndex);
     c.set(Calendar.DAY_OF_MONTH, 1);

     int numOfWeeksInMonth = 0;
     while (c.get(Calendar.MONTH) == monthIndex) {
         c.add(Calendar.DAY_OF_MONTH, 1);
         int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);
         if ( dayOfWeek == Calendar.SUNDAY) {
             numOfWeeksInMonth++;
         }
     }

     if (c.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY) {
         numOfWeeksInMonth++;
     }

     return numOfWeeksInMonth;
}

java - 计算周数 - 开始日期为星期一，结束日期为星期日

4 个答案: