Java获取指定时间段的年份（开始结束时间）月份（开始结束时间）天数（开始结束时间）

Posted 2022-04-17 格格巫 MMQ!!

package test;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

public class DateTest

public static void main(String[] args) 
    System.out.println(getYears("2016-01-01 00:00:00","2018-07-01 00:00:00"));
    System.out.println(getMonths("2018-01-01 00:00:00","2018-07-01 00:00:00"));
    System.out.println(getDays("2018-06-01 00:00:00","2018-07-01 00:00:00"));


/***
 * 获取两个时间段的年份/年第一天/年最后一天
 * @param startTime
 * @param endTime
 * @return
 */
public static List<Map> getYears(String startTime, String endTime) 
    List<Map> res=new ArrayList<Map>();
    DateFormat dateFormat = new SimpleDateFormat("yyyy");
    DateFormat dateFormat2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    try 
        Date start = dateFormat.parse(startTime);
        Date end = dateFormat.parse(endTime);
        Calendar tempStart = Calendar.getInstance();
        tempStart.setTime(start);
        Calendar tempEnd = Calendar.getInstance();
        tempEnd.setTime(end);
        tempEnd.add(Calendar.YEAR,1);// 日期加1(包含结束)
        while (tempStart.before(tempEnd)) 
            String year=dateFormat.format(tempStart.getTime());
            String first=year+"-01-01 00:00:00";
            String last=year+"-12-31 23:59:59";
            Map<String,Object> map=new HashMap<String,Object>();
            map.put("year", year);
            map.put("first", dateFormat2.parse(first));
            map.put("last", dateFormat2.parse(last));
            res.add(map);
            tempStart.add(Calendar.YEAR,1);
        
     catch (ParseException e) 
        e.printStackTrace();
    
    return res;


/***
 * 获取两个时间段的年份-月份/月第一天/月最后一天
 * @param startTime
 * @param endTime
 * @return
 */
public static List<Map> getMonths(String startTime, String endTime) 
    List<Map> res=new ArrayList<Map>();
    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM");
    DateFormat dateFormat2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    DateFormat dateFormat3 = new SimpleDateFormat("yyyy-MM-dd");
    try 
        Date start = dateFormat.parse(startTime);
        Date end = dateFormat.parse(endTime);
        Calendar tempStart = Calendar.getInstance();
        tempStart.setTime(start);
        Calendar tempEnd = Calendar.getInstance();
        tempEnd.setTime(end);
        tempEnd.add(Calendar.MONTH,1);// 日期加1(包含结束)
        while (tempStart.before(tempEnd)) 
            String month=dateFormat.format(tempStart.getTime());
            tempStart.set(Calendar.DAY_OF_MONTH, 1);
            String first=dateFormat3.format(tempStart.getTime());
            tempStart.set(Calendar.DAY_OF_MONTH, tempStart.getActualMaximum(Calendar.DAY_OF_MONTH));  
            Map<String,Object> map=new HashMap<String,Object>();
            map.put("month", month);
            map.put("first", dateFormat2.parse(first+" 00:00:00"));
            map.put("last", dateFormat2.parse(first+" 23:59:59"));
            res.add(map);
            tempStart.add(Calendar.MONTH,1);
        
     catch (ParseException e) 
        e.printStackTrace();
    
    return res;


/***
 * 获取两个时间段的天数/开始时间/结束时间
 * @param startTime
 * @param endTime
 * @return
 */
public static List<Map> getDays(String startTime, String endTime) 
    // 返回的日期集合
    List<Map> res=new ArrayList<Map>();
    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
    DateFormat dateFormat2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    try 
        Date start = dateFormat.parse(startTime);
        Date end = dateFormat.parse(endTime);
        Calendar tempStart = Calendar.getInstance();
        tempStart.setTime(start);
        Calendar tempEnd = Calendar.getInstance();
        tempEnd.setTime(end);
        tempEnd.add(Calendar.DATE, +1);// 日期加1(包含结束)
        while (tempStart.before(tempEnd)) 
            String day=dateFormat.format(tempStart.getTime());
            Map<String,Object> map=new HashMap<String,Object>();
            map.put("day", day);
            map.put("first", dateFormat2.parse(day+" 00:00:00"));
            map.put("last", dateFormat2.parse(day+" 23:59:59"));
            res.add(map);
            tempStart.add(Calendar.DAY_OF_YEAR, 1);
        
     catch (ParseException e) 
        e.printStackTrace();
    
    return res;