java获取给定月份和给定年份的第一个日期和最后一个日期 [英] java get the first date and last date of given month and given year

问题描述

我试图获取给定月份和年份的第一个日期和最后一个日期。我使用以下代码获取格式为yyyyMMdd的最后一个日期。但不能得到这种格式。此外，我想开始日期以相同的格式。我还在做这个。任何人都可以帮助我修复下面的代码。

I am trying to get the first date and the last date of the given month and year. I used the following code to get the last date in the format yyyyMMdd. But couldnot get this format. Also then I want the start date in the same format. I am still working on this. Can anyone help me in fixing the below code.

public static java.util.Date calculateMonthEndDate(int month, int year) {
    int[] daysInAMonth = { 29, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    int day = daysInAMonth[month];
    boolean isLeapYear = new GregorianCalendar().isLeapYear(year);

    if (isLeapYear && month == 2) {
        day++;
    }
    GregorianCalendar gc = new GregorianCalendar(year, month - 1, day);
    java.util.Date monthEndDate = new java.util.Date(gc.getTime().getTime());
    return monthEndDate;
}

public static void main(String[] args) {
    int month = 3;
    int year = 2076;
    final java.util.Date calculatedDate = calculateMonthEndDate(month, year);
    SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
    format.format(calculatedDate);
    System.out.println("Calculated month end date : " + calculatedDate);
} 

推荐答案

开始日期

To get the Start Date

    GregorianCalendar gc = new GregorianCalendar(year, month-1, 1);
    java.util.Date monthEndDate = new java.util.Date(gc.getTime().getTime());
    System.out.println(monthEndDate);

（ 注意 格式化的

(Note : in the Start date the day =1)

for the formatted

SimpleDateFormat format = new SimpleDateFormat(/////////add your format here);
System.out.println("Calculated month end date : " + format.format(calculatedDate));

这篇关于java获取给定月份和给定年份的第一个日期和最后一个日期的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！