Java循环输出每个月最后一天

Serical 5月 10, 2017

package com;

import java.util.Calendar;
import org.apache.commons.lang.time.DateFormatUtils;

public class Test {

    public static void main(String[] args) {
        // 循环每月最后一天
        Calendar calendar = Calendar.getInstance();
        for(int i=0; i<12; i++) {
            calendar.set(Calendar.MONTH, i);
            System.out.println(calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
            calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
            System.out.println(DateFormatUtils.format(calendar, "yyyy-MM-dd"));
            // 这句很关键
            calendar.set(Calendar.DAY_OF_MONTH, 1);
        }
    }
}