如何获得一年的开始和结束日期？ [英] How to get start and end date of a year?

问题描述

我必须使用Java Date 类来解决这个问题（它与我控制的东西接触）。

I have to use the Java Date class for this problem (it interfaces with something out of my control).

如何获得一年的开始和结束日期，然后遍历每个日期？

How do I get the start and end date of a year and then iterate through each date?

推荐答案

Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, 2014);
cal.set(Calendar.DAY_OF_YEAR, 1);    
Date start = cal.getTime();

//set date to last day of 2014
cal.set(Calendar.YEAR, 2014);
cal.set(Calendar.MONTH, 11); // 11 = december
cal.set(Calendar.DAY_OF_MONTH, 31); // new years eve

Date end = cal.getTime();

//Iterate through the two dates 
GregorianCalendar gcal = new GregorianCalendar();
gcal.setTime(start);
while (gcal.getTime().before(end)) {
    gcal.add(Calendar.DAY_OF_YEAR, 1);
    //Do Something ...
}

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