Java 输入两个时间日期，输出每个自然月的起始和结束时间日期

阳光穿透心脏的1/2处 2023-07-06 08:55 4阅读 0赞

上代码：

public static List<CycleTimeVo> getMonthBetween(String minDate, String maxDate) throws Exception {
            //  ArrayList<String> result = new ArrayList<String>();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");//格式化为年月
    
            Calendar min = Calendar.getInstance();
            Calendar max = Calendar.getInstance();
    
            min.setTime(sdf.parse(minDate));
            min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);
    
            max.setTime(sdf.parse(maxDate));
            max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);
    
            Calendar curr = min;
    
            List<CycleTimeVo> CycleTimeList=new ArrayList();
            while (curr.before(max)) {
    
                CycleTimeVo cycleTimeVo=new CycleTimeVo();
                cycleTimeVo.setStartTimeStr(sdf.format(curr.getTime()));
                String monthEnd = getMonthEnd(sdf.format(curr.getTime()));
                cycleTimeVo.setEndTimeStr(monthEnd);
                CycleTimeList.add(cycleTimeVo);
                //result.add(sdf.format(curr.getTime()));
                curr.add(Calendar.MONTH, 1);
            }
    
            return CycleTimeList;
        }
    
    
        public static String getMonthEnd(String  time) throws ParseException {
            SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd");
            Date date= simpleDateFormat.parse(time);
            Calendar c = Calendar.getInstance();
            c.setTime(date);
            //设置为当月最后一天
            c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
            //将小时至23
            c.set(Calendar.HOUR_OF_DAY, 23);
            //将分钟至59
            c.set(Calendar.MINUTE, 59);
            //将秒至59
            c.set(Calendar.SECOND,59);
            //将毫秒至999
            c.set(Calendar.MILLISECOND, 999);
            // 获取本月最后一天的时间
            return simpleDateFormat.format(c.getTime());
        }

测试结果：

List<CycleTimeVo> monthBetween = getMonthBetween("2019-01-01", "2020-06-03");
    
    
            System.out.println(monthBetween);

可以看到每个月的开始日期可结束日期都获取到了：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Mzg3OTQw_size_16_color_FFFFFF_t_70][]

**PS： 如果是要算出两个日期之间的月数，则只需要对最后的list取其size 即可。**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Mzg3OTQw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200217142959649.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Mzg3OTQw,size_16,color_FFFFFF,t_70