backend_code/src/main/java/com/template/common/utils/TimeExchange.java

package com.template.common.utils;

import com.template.model.enumModel.eWeekStatu;
import com.template.model.pojo.UnitTimeHelpModel;
import com.template.model.vo.ClassSettingDateVo;
import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.DateUtils;

import java.math.BigDecimal;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.*;

/**
 * 时间转化工具 date转为时间戳 时间戳转date 互相与String的转换
 * 所有出现的String time 格式都必须为(yyyy-MM-dd HH:mm:ss)，否则出错
 *
 */
public class TimeExchange {

    /**
     * String(yyyy-MM-dd HH:mm:ss) 转 Date
     *
     * @param time
     * @return
     * @throws ParseException
     */
    // String date = "2010/05/04 12:34:23";
    public static Date StringToDate(String time, String formatDate){

        Date date = new Date();
        // 注意format的格式要与日期String的格式相匹配
        DateFormat dateFormat = new SimpleDateFormat(formatDate);
        try {
            date = dateFormat.parse(time);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return date;
    }

    /**
     * Date转为String(yyyy-MM-dd HH:mm:ss)
     *
     * @param time
     * @return
     */
    public static String DateToString(Date time) {
        String dateStr = "";
        Date date = new Date();
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:sss");
        try {
            dateStr = dateFormat.format(time);
            System.out.println(dateStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dateStr;
    }

    public static String chineseDateTime(Date time){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分");
        String dateStringParse = null;
        try {
            dateStringParse = sdf.format(time);

        } catch (Exception e) {
            e.printStackTrace();
        }

        return dateStringParse;
    }

    /**
     * String(yyyy-MM-dd HH:mm:ss)转10位时间戳
     *
     * @param time
     * @return
     */
    public static Integer StringToTimestamp(String time) {

        int times = 0;
        try {
            times = (int) ((Timestamp.valueOf(time).getTime()) / 1000);
        } catch (Exception e) {
            e.printStackTrace();
        }
        if (times == 0) {
            System.out.println("String转10位时间戳失败");
        }
        return times;

    }

    /**
     * 10位int型的时间戳转换为String(yyyy-MM-dd HH:mm:ss)
     *
     * @param time
     * @return
     */
    public static String timestampToString(Integer time) {
        //int转long时，先进行转型再进行计算，否则会是计算结束后在转型
        long temp = (long) time * 1000;
        Timestamp ts = new Timestamp(temp);
        String tsStr = "";
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            //方法一
            tsStr = dateFormat.format(ts);
            System.out.println(tsStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return tsStr;
    }

    /**
     * 10位时间戳转Date
     *
     * @param time
     * @return
     */
    public static Date TimestampToDate(Integer time) {
        long temp = (long) time * 1000;
        Timestamp ts = new Timestamp(temp);
        Date date = new Date();
        try {
            date = ts;
            //System.out.println(date);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return date;
    }

    /**
     * 获取当前时间戳
     * @return
     */
    public static String DateNowTimeStamo(){
        Date date = new Date();//获取当前的日期
        SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");//设置日期格式
        String str = df.format(date);//获取String类型的时间
        return str;
    }

    /**
     * Date类型转换为10位时间戳
     *
     * @param time
     * @return
     */
    public static Integer DateToTimestamp(Date time) {
        Timestamp ts = new Timestamp(time.getTime());

        return (int) ((ts.getTime()) / 1000);
    }

    // 当前时间减1小时
    public static String TimeDesH(Date time, int hour) {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(time);
        nowTime2.add(Calendar.HOUR, -hour);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(nowTime2.getTime());
    }


    // 当前时间加5分钟
    public static String TimeRangeI(String time) throws ParseException {
        // 当前时间+5分钟
        Date endTime = DateUtils.addMinutes(StringToDate(time, "yyyy-MM-dd HH:mm:ss"), 300);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(endTime);
    }

    // 当前时间加2分钟
    public static String TimeRangeI10(String time, int m) {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(time, "yyyy-MM-dd HH:mm:ss"));
        nowTime2.add(Calendar.SECOND, m);//10分钟前的时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    // 当前时间减5分钟
    public static String TimeRangeD(String time) throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(time, "yyyy-MM-dd HH:mm:ss"));
        nowTime2.add(Calendar.MINUTE, -300);//5分钟前的时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    // 获取当天开始时间
    public static String getStartDate() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);
        calendar.setTimeInMillis(0);
        calendar.set(year, month, day, 0, 0, 0);
        return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
    }

    // 获取当天结束时间
    public static String getEndDate() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);
        calendar.setTimeInMillis(0);
        calendar.set(year, month, day, 23, 59, 59);
        return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
    }

    // 获取当前日期
    public static String getDate() {
        SimpleDateFormat sp = new SimpleDateFormat("yyyy-MM-dd");
        return sp.format(new Date());
    }

    // 获取当前日期的年月
    public static String getDateMonth() {
        SimpleDateFormat sp = new SimpleDateFormat("yyyy-MM-");
        return sp.format(new Date());
    }

    // 获取前天
    public static String getQianDay() throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(getTime(), "yyyy-MM-dd HH:mm:ss"));
        nowTime2.add(Calendar.DATE, -5);//5分钟前的时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    // 获取当前时间
    public static String getTime() {
        SimpleDateFormat sp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sp.format(new Date());
    }

    public static String getOnlyMM() {
        SimpleDateFormat sp = new SimpleDateFormat("HH:mm");
        return sp.format(new Date());
    }

    public static String getOnlyDesMM() throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(getTime(), "yyyy-MM-dd HH:mm:ss"));
        nowTime2.add(Calendar.MINUTE, -5);//5分钟前的时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    public static String getYear() {
        SimpleDateFormat sp = new SimpleDateFormat("yyyy");
        return sp.format(new Date());
    }

    public static String getMonth() {
        SimpleDateFormat sp = new SimpleDateFormat("yyyy-MM");
        return sp.format(new Date());
    }

    public static String getNowMonth() {
        SimpleDateFormat sp = new SimpleDateFormat("MM");
        return sp.format(new Date());
    }

    // 获取当前时间
    public static String getOnlyTime() {
        SimpleDateFormat sp = new SimpleDateFormat("HH:mm:ss");
        return sp.format(new Date());
    }

    /**
     * 计算两个日期的时间差
     *
     * @param time1
     * @param time2
     * @return
     */
    public static double getTimeDifference(String time1, String time2) {
        SimpleDateFormat timeformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long t1 = 0L;
        long t2 = 0L;
        try {
            t1 = timeformat.parse(time1).getTime();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            t2 = timeformat.parse(time2).getTime();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        //因为t1-t2得到的是毫秒级,所以要初3600000得出小时.算天数或秒同理
        double hours = (double) ((t2 - t1) / 3600000);
        double minutes = (double) (((t2 - t1) / 1000 - hours * 3600) / 60 / 60);
        return hours + minutes;
    }

    public static double getOnlyTimeDifference(String time1, String time2) {
        SimpleDateFormat timeformat = new SimpleDateFormat("HH:mm:ss");
        long t1 = 0L;
        long t2 = 0L;
        try {
            t1 = timeformat.parse(time1).getTime();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            t2 = timeformat.parse(time2).getTime();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        //因为t1-t2得到的是毫秒级,所以要初3600000得出小时.算天数或秒同理
        double hours = (double) ((t2 - t1) / 3600000);
        double minutes = (double) (((t2 - t1) / 1000 - hours * 3600) / 60 / 60);
        return hours + minutes;
    }

    public static double getDiff(String str1, String str2) {
        return str2.compareTo(str1);
    }

    /**
     * 时间加减分钟数
     *
     * @param time      时间
     * @param FormatStr 时间格式
     * @param amount    要加减的时间（单位为分钟）
     * @return
     * @throws ParseException
     */
    public static String TimeRangeMinute(String time, int amount, String FormatStr) throws ParseException {
        Date endTime = DateUtils.addMinutes(ShortStringToDate(time, FormatStr), amount);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(FormatStr);
        return simpleDateFormat.format(endTime);
    }

    /**
     * 时间加减小时数
     *
     * @param time      时间
     * @param FormatStr 时间格式
     * @param amount    要加减的时间（单位为小时）
     * @return
     * @throws ParseException
     */
    public static String TimeRangeHour(Date time, int amount, String FormatStr) {
        Date endTime = DateUtils.addHours(time, amount);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(FormatStr);
        return simpleDateFormat.format(endTime);
    }

    /**
     * String 转 Date
     *
     * @param time      时间
     * @param formatStr 自定义时间格式
     * @return
     * @throws ParseException
     */
    public static Date ShortStringToDate(String time, String formatStr) throws ParseException {

        Date date = new Date();
        // 注意format的格式要与日期String的格式相匹配
        DateFormat dateFormat = new SimpleDateFormat(formatStr);
        try {
            date = dateFormat.parse(time);
            System.out.println(date.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }

        return date;
    }

    /**
     * Date转为String
     *
     * @param time      时间
     * @param FormatStr 自定义时间格式
     * @return
     */
    public static String DateToString(Date time, String FormatStr) {
        String dateStr = "";
        DateFormat dateFormat = new SimpleDateFormat(FormatStr);
        try {
            dateStr = dateFormat.format(time);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dateStr;
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 比较时间1是否小于时间2
     * 如果时间1小于时间2，接口返回true
     * 如果时间1大于时间2，接口返回false
     *
     * @param dateOne 时间1
     * @param dateTwo 时间2
     * @param Forma   时间格式
     * @return
     * @throws ParseException
     */
    public static boolean CompareDate(String dateOne, String dateTwo, String Forma) throws ParseException {
        SimpleDateFormat df = new SimpleDateFormat(Forma);
        Date sd1 = df.parse(dateOne);
        Date sd2 = df.parse(dateTwo);
        return sd1.before(sd2);
    }

    public static LocalDateTime StringToLocalTime(String time, String formatStr){
        //1.具有转换功能的对象
        DateTimeFormatter df = DateTimeFormatter.ofPattern(formatStr);
        //3.LocalDate发动，将字符串转换成  df格式的LocalDateTime对象，的功能
        LocalDateTime LocalTime = LocalDateTime.parse(time,df);

        return LocalTime;
    }

    /**
     * 获取一周的开始时间和结束时间
     * 获取本周星期一作为一周的第一天的起始时间和结束时间
     *
     * @return 返回的数据中第一个是开始时间 第二个是结束时间
     */
    public static String[] getCurrentWeekTimeFrame() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        //start of the week
        if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
            calendar.add(Calendar.DAY_OF_YEAR, -1);
        }
        calendar.add(Calendar.DAY_OF_WEEK, -(calendar.get(Calendar.DAY_OF_WEEK) - 2));
        //给0的时候查不出数据
//        calendar.set(Calendar.HOUR_OF_DAY, 0);
//        calendar.set(Calendar.MINUTE, 0);
//        calendar.set(Calendar.SECOND, 0);
//        calendar.set(Calendar.MILLISECOND, 0);

        String startTime = DateToString(calendar.getTime(), "yyyy-MM-dd");
        //end of the week
        calendar.add(Calendar.DAY_OF_WEEK, 6);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        String endTime = DateToString(calendar.getTime(), "yyyy-MM-dd");
        return new String[]{startTime, endTime};
    }

    /**
     * 获取指定月份有多少天
     *
     * @param month
     * @return
     */
    public static int getMonthDays(String date, int month) {
        int year = Integer.valueOf(date.substring(0, 4));
        int[] arr = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
        int day = arr[month - 1];//天数对应=数组-1
        if (month == 2 && year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
            day = 29;
        }

        return day;

    }

    /**
     * 获取指定月份的第一天和最后一天
     *
     * @param DateStr 指定月份
     * @return 返回的数据中第一个是开始时间 第二个是结束时间
     */
    public static String[] getCurrentMonthTimeFrame(String DateStr) {
        Calendar c = Calendar.getInstance();//获取Calendar实例
        c.set(Calendar.YEAR, Integer.parseInt(DateStr.substring(0, 4)));
        int sss = Integer.parseInt(DateStr.substring(5, 7));
        c.set(Calendar.MONTH, Integer.parseInt(DateStr.substring(5, 7).replace("-", "")) - 1);

        c.set(Calendar.DAY_OF_MONTH, 1);

        String startDate = new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());

        int lastDay = c.getActualMaximum(Calendar.DAY_OF_MONTH);
        c.set(Calendar.DAY_OF_MONTH, lastDay);
        String endDate = new SimpleDateFormat("yyyy-MM-dd").format(c.getTime()) + " 23:59:59";

        return new String[]{startDate, endDate};
    }

    //region 获取某一天的开始时间
    public static String getStartOfDayStr(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);
        calendar.setTimeInMillis(0);
        calendar.set(year, month, day, 0, 0, 0);
        return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
    }
    //endregion

    //region 获取某一天的结束时间
    public static String getEndOfDayStr(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);
        calendar.setTimeInMillis(0);
        calendar.set(year, month, day, 23, 59, 59);
        return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
    }
    //endregion

    //region 获取指定月份的最后一天
    public static Date getToMonthEndDate(String DateStr) {
        Calendar c = Calendar.getInstance();
        c.clear();
        c.set(Calendar.YEAR, Integer.parseInt(DateStr.substring(0, 4)));
        c.set(Calendar.MONTH, Integer.parseInt(DateStr.substring(5, 7).replace("-", "")) - 1);
        c.roll(Calendar.DAY_OF_MONTH, -1);
        c.set(Calendar.HOUR_OF_DAY, 23);
        c.set(Calendar.MINUTE, 59);
        c.set(Calendar.SECOND, 59);
        c.set(Calendar.MILLISECOND, 999);

        return c.getTime();
    }
    //endregion

    //region 获取指定月份的第一天
    public static Date getToMonthBeginDate(String DateStr) {
        Calendar c = Calendar.getInstance();
        c.clear();
        c.set(Calendar.YEAR, Integer.parseInt(DateStr.substring(0, 4)));
        c.set(Calendar.MONTH, Integer.parseInt(DateStr.substring(5, 7).replace("-", "")) - 1);
        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 000);
        return c.getTime();
    }
    //endregion

    //region 获取某一天的开始时间
    public static Date getStartOfDay(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);
        calendar.set(year, month, day, 0, 0, 0);
        calendar.set(Calendar.MILLISECOND, 000);
        return calendar.getTime();
    }
    //endregion

    //region 获取某一天的结束时间
    public static Date getEndOfDay(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);
        calendar.setTimeInMillis(0);
        calendar.set(year, month, day, 23, 59, 59);
        return calendar.getTime();
    }
    //endregion

    public static List<UnitTimeHelpModel> MonthArrayTime(Date StartDate, Date EndDate) {

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");//格式化为年月
        Calendar StartTime = Calendar.getInstance();
        StartTime.setTime(StartDate);
        StartTime.set(StartTime.get(Calendar.YEAR), StartTime.get(Calendar.MONTH), StartTime.get(Calendar.DATE));
        Calendar EndTime = Calendar.getInstance();
        EndTime.setTime(EndDate);
        EndTime.set(EndTime.get(Calendar.YEAR), EndTime.get(Calendar.MONTH), EndTime.get(Calendar.DATE));
        int total = (EndTime.get(Calendar.YEAR) - StartTime.get(Calendar.YEAR)) * 12 + (EndTime.get(Calendar.MONTH) - StartTime.get(Calendar.MONTH));
        List<UnitTimeHelpModel> result = new ArrayList() {
        };
        for (int i = 0; i <= total; i++) {
            StartTime.add(Calendar.MONTH, i == 0 ? 0 : 1);
            Date MonthLastDay = getToMonthEndDate(sdf.format(StartTime.getTime()));
            UnitTimeHelpModel data = new UnitTimeHelpModel();
            data.setStartDate(i == 0 ? StartTime.getTime() : getStartOfDay(getToMonthBeginDate(sdf.format(StartTime.getTime()))));
            data.setEndDate(EndTime.getTime().before(MonthLastDay) ? getEndOfDay(EndTime.getTime()) : MonthLastDay);
            result.add(data);
        }

        return result;
    }

    public static List<ClassSettingDateVo> getDatesBetween(LocalDate startDate, LocalDate endDate) {
        List<ClassSettingDateVo> datas = new ArrayList<>();
        long numOfDaysBetween = ChronoUnit.DAYS.between(startDate, endDate);
        for (int i = 0; i <= numOfDaysBetween; i++) {
            ClassSettingDateVo data = new ClassSettingDateVo();
            LocalDate date = startDate.plusDays(i);
            // 获取当前日期对应的星期几
            DayOfWeek dow = date.getDayOfWeek();
            int dayOfWeek = dow.getValue(); // 获取星期几的数字表示，1表示周一，7表示周日
            data.setWeekStr(eWeekStatu.stringOf(dayOfWeek));
            data.setWeek(dayOfWeek);
            data.setDateStr(date.toString());
            datas.add(data);
        }
        return datas;
    }

    /**
     * 获取时间date1与date2相差的秒数
     *
     * @param date1 起始时间
     * @param date2 结束时间
     * @return 返回相差的秒数
     */
    public static int getOffsetSeconds(Date date1, Date date2) {
        int seconds = (int) ((date2.getTime() - date1.getTime()) / 1000);
        return seconds;
    }

    /**
     * 获取时间date1与date2相差的分钟数
     *
     * @param date1 起始时间
     * @param date2 结束时间
     * @return 返回相差的分钟数
     */
    public static int getOffsetMinutes(Date date1, Date date2) {
        return getOffsetSeconds(date1, date2) / 60;
    }

    /**
     * 获取时间date1与date2相差的小时数
     *
     * @param date1 起始时间
     * @param date2 结束时间
     * @return 返回相差的小时数
     */
    public static int getOffsetHours(Date date1, Date date2) {
        return getOffsetMinutes(date1, date2) / 60;
    }

    /**
     * 获取时间date1与date2相差的天数数
     *
     * @param date1 起始时间
     * @param date2 结束时间
     * @return 返回相差的天数
     */
    public static int getOffsetDays(Date date1, Date date2) {
        return getOffsetHours(date1, date2) / 24+1;
    }

    public static boolean overlapping(String start1,String end1,String start2,String end2) throws ParseException {
        boolean one = CompareDate(start1,end2,"HH:mm");
        boolean two = CompareDate(start2,end1,"HH:mm");
        return (one && two);
    }

    public static String getWeek(String sdate) throws ParseException {
        // 再转换为时间
        Date date = StringToDate(sdate,"yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        // int hour=c.get(Calendar.DAY_OF_WEEK);
        // hour中存的就是星期几了，其范围 1~7
        // 1=星期日 7=星期六，其他类推
        return new SimpleDateFormat("EEEE").format(c.getTime());
    }

    public static void main(String[] args) throws ParseException {
        int total = 25;
        int pageSize = 20;
        int restData =(total + pageSize - 1) / pageSize;
        System.out.println("数据："+restData);
        String sdsd ="";
    }
}