package com.whyc.util;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.*;
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/**
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* @Description : 时间工具类
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* @date 2020/10/15
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**/
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public class DateUtil {
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public static SimpleDateFormat YYYY_MM_DD_HH_MM_SS=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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public static SimpleDateFormat YYYY_MM_DD_HH_MM_SS_UNION=new SimpleDateFormat("yyyyMMddHHmmss");
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public static SimpleDateFormat YYYY_MM_DD=new SimpleDateFormat("yyyy-MM-dd");
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public static List<List<Date>> getMonthTime(Date startTimeDate,Date endTimeDate) throws ParseException {
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List<List<Date>> timeList = new LinkedList<>();
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Calendar startTimeCalendar = Calendar.getInstance();
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startTimeCalendar.setTime(startTimeDate);
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Calendar endTimeCalendar = Calendar.getInstance();
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endTimeCalendar.setTime(endTimeDate);
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//按月份切分时段
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int startY = startTimeCalendar.get(Calendar.YEAR);
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int startM = startTimeCalendar.get(Calendar.MONTH)+1;
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int endY = endTimeCalendar.get(Calendar.YEAR);
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int endM = endTimeCalendar.get(Calendar.MONTH)+1;
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int Y = endY - startY;
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int len = Y*12+(endM-startM)+1;
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Calendar dateTemp = Calendar.getInstance();
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for (int i = 0; i < len; i++) {
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List<Date> SEList = new LinkedList<>();
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dateTemp.setTime(YYYY_MM_DD_HH_MM_SS.parse(startY+"-"+startM+"-01 00:00:00"));
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Date recordTime,recordTime1;
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dateTemp.add(Calendar.MONTH,i);
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recordTime = dateTemp.getTime();
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int lastDay = dateTemp.getActualMaximum(Calendar.DAY_OF_MONTH);
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dateTemp.set(Calendar.DAY_OF_MONTH,lastDay);
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dateTemp.set(Calendar.HOUR_OF_DAY,23);
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dateTemp.set(Calendar.MINUTE,59);
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dateTemp.set(Calendar.SECOND,59);
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recordTime1 = dateTemp.getTime();
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if(i==0){
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recordTime = startTimeDate;
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}
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if(i==len-1){
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recordTime1 = endTimeDate;
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}
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SEList.add(recordTime);
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SEList.add(recordTime1);
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timeList.add(SEList);
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}
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return timeList;
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}
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/**
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* 在分表的情况下使用,按年分表,查询需要切割查询使用
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* <p>
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* 根据传入的起止时间,按照年切割成不同时间段
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*
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* @param startTime 2021-01-01 10:00:00
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* @param endTime 2023-05-01 10:10:10
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* @return 示例[2021, 2022, 2023]
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* 使用方法:
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* 根据返回的第一个数据,如果存在表,则查询筛选条件为>=输入的起始时间;不存在则弃用输入的起始时间
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* 根据返回的最后个数据,如果表存在,则查询筛选条件为<=输入的终止时间;不存在则弃用输入的终止时间
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* 返回的非第一最后数据,查询全表
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*/
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public static List<Map<String,List<Date>>> getYearList(Date startTime,Date endTime) throws ParseException {
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List<Map<String,List<Date>>> result = new LinkedList<>();
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Calendar startTimeC = Calendar.getInstance();
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startTimeC.setTime(startTime);
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int startYear = startTimeC.get(Calendar.YEAR);
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Calendar endTimeC = Calendar.getInstance();
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endTimeC.setTime(endTime);
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int endYear = endTimeC.get(Calendar.YEAR);
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int yearSize = endYear - startYear + 1;
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for (int i = startYear; i <= endYear; i++) {
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Map<String,List<Date>> dateMap = new HashMap<>();
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List<Date> dateList = new LinkedList<>();
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if(yearSize == 1){ //起止时间没有跨年
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dateList.add(startTime);
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dateList.add(endTime);
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}
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else if(i==startYear){ //第一年
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dateList.add(startTime);
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Calendar instance = Calendar.getInstance();
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instance.set(Calendar.YEAR,i);
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instance.set(Calendar.MONTH,instance.getActualMaximum(Calendar.MONTH));
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instance.set(Calendar.DAY_OF_MONTH,instance.getActualMaximum(Calendar.DAY_OF_MONTH));
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instance.set(Calendar.HOUR_OF_DAY,instance.getActualMaximum(Calendar.HOUR_OF_DAY));
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instance.set(Calendar.MINUTE,instance.getActualMaximum(Calendar.MINUTE));
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instance.set(Calendar.SECOND,instance.getActualMaximum(Calendar.SECOND));
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dateList.add(instance.getTime());
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}
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else if(i== endYear){ //尾年
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Calendar instance = Calendar.getInstance();
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instance.set(Calendar.YEAR,i);
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instance.set(Calendar.MONTH,instance.getActualMinimum(Calendar.MONTH));
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instance.set(Calendar.DAY_OF_MONTH,instance.getActualMinimum(Calendar.DAY_OF_MONTH));
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instance.set(Calendar.HOUR_OF_DAY,instance.getActualMinimum(Calendar.HOUR_OF_DAY));
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instance.set(Calendar.MINUTE,instance.getActualMinimum(Calendar.MINUTE));
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instance.set(Calendar.SECOND,instance.getActualMinimum(Calendar.SECOND));
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dateList.add(instance.getTime());
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dateList.add(endTime);
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}else{
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Calendar instance = Calendar.getInstance();
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instance.set(Calendar.YEAR,i);
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instance.set(Calendar.MONTH,instance.getActualMinimum(Calendar.MONTH));
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instance.set(Calendar.DAY_OF_MONTH,instance.getActualMinimum(Calendar.DAY_OF_MONTH));
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instance.set(Calendar.HOUR_OF_DAY,instance.getActualMinimum(Calendar.HOUR_OF_DAY));
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instance.set(Calendar.MINUTE,instance.getActualMinimum(Calendar.MINUTE));
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instance.set(Calendar.SECOND,instance.getActualMinimum(Calendar.SECOND));
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dateList.add(instance.getTime());
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Calendar instance2 = Calendar.getInstance();
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instance2.set(Calendar.YEAR,i);
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instance2.set(Calendar.MONTH,instance2.getActualMaximum(Calendar.MONTH));
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instance2.set(Calendar.DAY_OF_MONTH,instance2.getActualMaximum(Calendar.DAY_OF_MONTH));
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instance2.set(Calendar.HOUR_OF_DAY,instance2.getActualMaximum(Calendar.HOUR_OF_DAY));
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instance2.set(Calendar.MINUTE,instance2.getActualMaximum(Calendar.MINUTE));
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instance2.set(Calendar.SECOND,instance2.getActualMaximum(Calendar.SECOND));
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dateList.add(instance2.getTime());
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}
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dateMap.put(String.valueOf(i),dateList);
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result.add(dateMap);
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}
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return result;
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}
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/**
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*
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* 在分表的情况下使用,按月分表,查询需要切割查询使用
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*
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* 根据传入的起止时间,按照月切割成不同时间段
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* @param startTimeStr 2022-11-01 10:00:00
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* @param endTimeStr 2023-05-01 10:10:10
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* @return 示例[2022_12,2023_1,2023_2,2023_3,2023_4,2023_5] TODO 这个返回对象格式 需要根据业务需要进行调整
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* 使用方法:
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* 根据返回的第一个数据,如果存在表,则查询筛选条件为>=输入的起始时间;不存在则弃用输入的起始时间
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* 根据返回的最后个数据,如果表存在,则查询筛选条件为<=输入的终止时间;不存在则弃用输入的终止时间
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* 返回的非第一最后数据,查询全表
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*
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*/
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public static List<String> getMonthList(String startTimeStr,String endTimeStr) throws ParseException {
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Calendar startTimeCalendar = Calendar.getInstance();
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Date startTime = DateUtil.YYYY_MM_DD_HH_MM_SS.parse(startTimeStr);
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startTimeCalendar.setTime(startTime);
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Calendar endTimeCalendar = Calendar.getInstance();
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Date endTime = DateUtil.YYYY_MM_DD_HH_MM_SS.parse(endTimeStr);
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endTimeCalendar.setTime(endTime);
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/*String[] startTimeSplit = startTimeStr.split("-");
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int startYear = Integer.parseInt(startTimeSplit[0]);
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int startMonth = Integer.parseInt(startTimeSplit[1]);
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String[] endTimeSplit = endTimeStr.split("-");
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int endYear = Integer.parseInt(endTimeSplit[0]);
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int endMonth = Integer.parseInt(endTimeSplit[1]);*/
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List<String> yearMonthList = new LinkedList<>();
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while (!startTimeCalendar.after(endTimeCalendar)){ //起始时间大于终止时间则停止
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yearMonthList.add(startTimeCalendar.get(Calendar.YEAR)+"_"+(startTimeCalendar.get(Calendar.MONTH)+1));
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startTimeCalendar.add(Calendar.MONTH,1);
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}
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return yearMonthList;
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}
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/**
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* 查询使用时,需要处理 默认表查询的问题
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* 示例:
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* <p>
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* {2020=[Fri Dec 25 14:12:22 CST 2020, Thu Dec 31 23:59:59 CST 2020]}
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* {2021=[Fri Jan 01 00:00:00 CST 2021, Fri Dec 31 23:59:59 CST 2021]}
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* {2022=[Sat Jan 01 00:00:00 CST 2022, Tue Nov 29 09:12:22 CST 2022]}
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* 或
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* {2020=[Fri Dec 25 14:12:22 CST 2020, Thu Dec 31 23:59:59 CST 2020]}
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* {2021=[Fri Jan 01 00:00:00 CST 2021, Fri Dec 31 23:59:59 CST 2021]}
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* {2022=[Sat Jan 01 00:00:00 CST 2022, Thu Dec 29 09:12:22 CST 2022]}
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* {default=[Wed Dec 14 15:27:13 CST 2022, Thu Dec 29 09:12:22 CST 2022]}
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* </p>
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* key为数字,表示年度分表;default为默认表
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* @param startTimeDate 起始时间
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* @param endTimeDate 终止时间
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* @return 需要查询的表及查询时间
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* @throws ParseException
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*/
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public static List<Map<String,List<Date>>> getQueryTimeForSubTables(Date startTimeDate,Date endTimeDate) throws ParseException {
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//根据筛选的时间段,查询出符合要求的各分表记录数
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//首先,如果当前时间超过7月,默认表中只有本年度的;如果没超过7月,默认表还存在上一年度的记录
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Calendar instance = Calendar.getInstance();
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if(endTimeDate.compareTo(instance.getTime())>0){ //校验优化最大查询时间
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endTimeDate = instance.getTime();
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}
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int nowYear = instance.get(Calendar.YEAR);
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instance.add(Calendar.MONTH,-6);
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int beforeYear = instance.get(Calendar.YEAR);
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Date beforeYearTime = instance.getTime();
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instance.setTime(endTimeDate);
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int endTimeYear = instance.get(Calendar.YEAR);
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Calendar startTime = Calendar.getInstance();
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startTime.setTime(startTimeDate);
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List<Map<String,List<Date>>> yearTimeList = DateUtil.getYearList(startTimeDate, endTimeDate);;
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if(nowYear == beforeYear){ //默认表只有本年度的(超过了半年,默认表记录全部只有本年度的,同时会生成了当前年度的分表)
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//如果查询时间范围包含当前年度,则需要查询默认表
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if(startTime.get(Calendar.YEAR) >= nowYear && endTimeYear <= nowYear){
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//开始时间设置年度初始时间
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Calendar defaultTableStartTime = Calendar.getInstance();
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defaultTableStartTime.set(Calendar.YEAR,nowYear);
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defaultTableStartTime.set(Calendar.MONTH,defaultTableStartTime.getActualMinimum(Calendar.MONTH));
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defaultTableStartTime.set(Calendar.DAY_OF_MONTH,defaultTableStartTime.getActualMinimum(Calendar.DAY_OF_MONTH));
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defaultTableStartTime.set(Calendar.HOUR_OF_DAY,defaultTableStartTime.getActualMinimum(Calendar.HOUR_OF_DAY));
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defaultTableStartTime.set(Calendar.MINUTE,defaultTableStartTime.getActualMinimum(Calendar.MINUTE));
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defaultTableStartTime.set(Calendar.SECOND,defaultTableStartTime.getActualMinimum(Calendar.SECOND));
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//终止时间设置为当前时间
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List<Date> defaultDateList = new LinkedList<>();
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defaultDateList.add(defaultTableStartTime.getTime());
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defaultDateList.add(endTimeDate);
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Map<String,List<Date>> defaultMap = new HashMap<>();
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defaultMap.put("default",defaultDateList);
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yearTimeList.add(defaultMap);
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}
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}else{ //查询时间范围不在当前年度
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//默认表中存在上一年度的记录.上一年的最早时间为beforeYearTime-上一年的年末
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//判断查询时间范围是否包含默认表中上一年度的时间
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if(instance.getTime().compareTo(beforeYearTime)>0){ //查询时间大于默认表中上一年度时间,说明查询记录也包含在默认表中
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//起始时间
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//终止时间
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List<Date> defaultDateList = new LinkedList<>();
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defaultDateList.add(beforeYearTime);
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defaultDateList.add(endTimeDate);
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Map<String,List<Date>> defaultMap = new HashMap<>();
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defaultMap.put("default",defaultDateList);
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yearTimeList.add(defaultMap);
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}
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}
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return yearTimeList;
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}
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public static void main(String[] args) throws ParseException {
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Date d1 = YYYY_MM_DD_HH_MM_SS.parse("2020-12-25 14:12:22");
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Date d2 = YYYY_MM_DD_HH_MM_SS.parse("2022-12-29 09:12:22");
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List<Map<String, List<Date>>> yearListForSubTables = getQueryTimeForSubTables(d1, d2);
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for (int i = 0; i < yearListForSubTables.size(); i++) {
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Map<String, List<Date>> stringListMap = yearListForSubTables.get(i);
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System.out.println(stringListMap);
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}
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/*String dateStr = "2023-07-01 00:00:01";
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Date date = YYYY_MM_DD_HH_MM_SS.parse(dateStr);
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Calendar instance = Calendar.getInstance();
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instance.setTime(date);
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instance.add(Calendar.MONTH,-6);
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System.out.println(YYYY_MM_DD_HH_MM_SS.format(instance.getTime()));*/
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}
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}
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