java按照月份把一个时间段拆分成多个时间区间

曾经终败给现在 2022-06-01 02:07 1002阅读 0赞

package com.changchong.util;
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.ArrayList;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.List;
    
    import org.junit.Test;
    /** * 根据一段时间区间，按月份拆分成多个时间段 * @author lxg * * 2016年9月5日下午6:18:36 */
    public class SplitDateUtil { 
    
        @Test
        public void demo(){
            List<KeyValueForDate> list = SplitDateUtil.getKeyValueForDate("2015-08-23","2016-06-10");
            System.out.println("开始日期--------------结束日期");
            for(KeyValueForDate date : list){
                System.out.println(date.getStartDate()+"-----"+date.getEndDate());
            }
        }
    
        /** * 根据一段时间区间，按月份拆分成多个时间段 * @param startDate 开始日期 * @param endDate 结束日期 * @return */
        @SuppressWarnings("deprecation")
        public static List<KeyValueForDate> getKeyValueForDate(String startDate,String endDate) {
            List<KeyValueForDate> list = null;
            try {
                list = new ArrayList<KeyValueForDate>();
    
                String firstDay = "";
                String lastDay = "";
                Date d1 = new SimpleDateFormat("yyyy-MM-dd").parse(startDate);// 定义起始日期
    
                Date d2 = new SimpleDateFormat("yyyy-MM-dd").parse(endDate);// 定义结束日期
    
                Calendar dd = Calendar.getInstance();// 定义日期实例
                dd.setTime(d1);// 设置日期起始时间
                Calendar cale = Calendar.getInstance();
    
                Calendar c = Calendar.getInstance();
                c.setTime(d2);
    
                int startDay = d1.getDate();
                int endDay = d2.getDate();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
                KeyValueForDate keyValueForDate = null;
    
                while (dd.getTime().before(d2)) {
         // 判断是否到结束日期
                    keyValueForDate = new KeyValueForDate();
                    cale.setTime(dd.getTime());
    
                    if(dd.getTime().equals(d1)){
                        cale.set(Calendar.DAY_OF_MONTH, dd
                                .getActualMaximum(Calendar.DAY_OF_MONTH));
                        lastDay = sdf.format(cale.getTime());
                        keyValueForDate.setStartDate(sdf.format(d1));
                        keyValueForDate.setEndDate(lastDay);
    
                    }else if(dd.get(Calendar.MONTH) == d2.getMonth() && dd.get(Calendar.YEAR) == c.get(Calendar.YEAR)){
                        cale.set(Calendar.DAY_OF_MONTH,1);//取第一天
                        firstDay = sdf.format(cale.getTime());
    
                        keyValueForDate.setStartDate(firstDay);
                        keyValueForDate.setEndDate(sdf.format(d2));
    
                    }else {
                        cale.set(Calendar.DAY_OF_MONTH,1);//取第一天
                        firstDay = sdf.format(cale.getTime());
    
                        cale.set(Calendar.DAY_OF_MONTH, dd
                                .getActualMaximum(Calendar.DAY_OF_MONTH));
                        lastDay = sdf.format(cale.getTime());
    
                        keyValueForDate.setStartDate(firstDay);
                        keyValueForDate.setEndDate(lastDay);
    
                    }
                    list.add(keyValueForDate);
                    dd.add(Calendar.MONTH, 1);// 进行当前日期月份加1
    
                }
    
                if(endDay<startDay){
                    keyValueForDate = new KeyValueForDate();
    
                    cale.setTime(d2);
                    cale.set(Calendar.DAY_OF_MONTH,1);//取第一天
                    firstDay = sdf.format(cale.getTime());
    
                    keyValueForDate.setStartDate(firstDay);
                    keyValueForDate.setEndDate(sdf.format(d2));
                    list.add(keyValueForDate);
                }
            } catch (ParseException e) {
                return null;
            }
    
            return list;
        }
    
    }
    
    
    
    class KeyValueForDate{
        private String startDate;
        private String endDate;
        public String getStartDate() {
            return startDate;
        }
        public void setStartDate(String startDate) {
            this.startDate = startDate;
        }
        public String getEndDate() {
            return endDate;
        }
        public void setEndDate(String endDate) {
            this.endDate = endDate;
        }
    
    
    }
       
        
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![这里写图片描述][20160905183010730]

[20160905183010730]: /images/20220601/8ca30a5edc674656be44dc7eb76b32bd.png