java根据开始时间结束时间计算中间间隔日期的实例代码

import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.Date;import java.util.List;public class Test { public static List<String> findDates(String stime, String etime)   throws ParseException {  List<String> allDate = new ArrayList();  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");  Date dBegin = sdf.parse(stime);  Date dEnd = sdf.parse(etime);  allDate.add(sdf.format(dBegin));  Calendar calBegin = Calendar.getInstance();  // 使用给定的 Date 设置此 Calendar 的时间  calBegin.setTime(dBegin);  Calendar calEnd = Calendar.getInstance();  // 使用给定的 Date 设置此 Calendar 的时间  calEnd.setTime(dEnd);  // 测试此日期是否在指定日期之后  while (dEnd.after(calBegin.getTime())) {   // 根据日历的规则，为给定的日历字段添加或减去指定的时间量   calBegin.add(Calendar.DAY_OF_MONTH, 1);   allDate.add(sdf.format(calBegin.getTime()));  }  return allDate; } public static void main(String[] args) {  //测试数据  String stime = "2019-05-01";  String etime = "2019-05-05";  //集合中包含2019-05-01/2019-05-05，不需要可去除  List<String> list = new ArrayList<>();  try {   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");   long s = Long.valueOf(sdf.parse(stime).getTime());   long e = Long.valueOf(sdf.parse(etime).getTime());   //只有结束时间大于开始时间时才进行查询   if(s<e) {    list = findDates(stime, etime);   }  } catch (ParseException e) {   e.printStackTrace();  }  for(String time : list) {   System.out.println(time);  }  System.out.println("间隔天数：" + list.size()); }}

import java.text.SimpleDateFormat;import java.util.Date;public class Calcdate { static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); static SimpleDateFormat ymd = new SimpleDateFormat("yyyy-MM-dd"); public static void main(String[] args)throws Exception{  Date beginTime = sdf.parse("2015-04-23 12:32:44");//  Date endTime = sdf.parse("2015-04-23 14:56:44");  Date endTime = sdf.parse("2015-04-29 14:56:44");  long diff = (endTime.getTime() - beginTime.getTime()) / (86400 * 1000);  System.out.println("diff = " + diff);  Date sb = null;  Date se = null;  if(diff == 0){   sb = beginTime;   se = endTime;   String ss = String.format("%d> Sb=%s, Se=%s", 1, Coder.DateTimeToStr(sb), Coder.DateTimeToStr(se));   System.out.println(ss);  }else {   int i = 0;   while (i <= diff) {    if (i == 0) {     sb = beginTime;     se = sdf.parse(ymd.format(sb) + " 23:59:59");    } else if (i == diff) {     sb = sdf.parse(ymd.format(endTime) + " 00:00:00");     se = endTime;    } else {     se = new Date(beginTime.getTime() + i * 24 * 60 * 60 * 1000);     sb = sdf.parse(ymd.format(se) + " 00:00:00");     se = sdf.parse(ymd.format(se) + " 23:59:59");    }    String ss = String.format("%d> Sb=%s, Se=%s", i, Coder.DateTimeToStr(sb), Coder.DateTimeToStr(se));    System.out.println(ss);    i++;   }  } }}

diff = 60> Sb=2015-04-23 12:32:44, Se=2015-04-23 23:59:591> Sb=2015-04-24 00:00:00, Se=2015-04-24 23:59:592> Sb=2015-04-25 00:00:00, Se=2015-04-25 23:59:593> Sb=2015-04-26 00:00:00, Se=2015-04-26 23:59:594> Sb=2015-04-27 00:00:00, Se=2015-04-27 23:59:595> Sb=2015-04-28 00:00:00, Se=2015-04-28 23:59:596> Sb=2015-04-29 00:00:00, Se=2015-04-29 14:56:44