backend_code/src/main/java/com/template/common/utils/TimeExchange2.java

package com.template.common.utils;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
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
 * @author
 *
 */
public class TimeExchange2 {

    /**
     * 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) 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("yyyy-MM-dd HH:mm:ss");
        try {
            date = dateFormat.parse(time);
            System.out.println(date.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }

        return date;
    }

    public static Date StringToDate2(String time) 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("yyyy-MM-dd HH:mm:ss");
        try {
            date = dateFormat.parse(time);
            System.out.println(date.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }

        return date;
    }

    /**
     * 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 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);
        } 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");
        try {
            dateStr = dateFormat.format(time);
            System.out.println(dateStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dateStr;
    }

    public static String ToSimpleMonth(Date time) {
        String dateStr = "";
        DateFormat dateFormat = new SimpleDateFormat("M");
        try {
            dateStr = dateFormat.format(time);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dateStr;
    }

    /**
     * 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;
    }
    /**
     * 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(String time) throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(time));
        nowTime2.add(Calendar.HOUR, -1);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    // 最近两天
    public static String getLastTwo() throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(getTime()));
        nowTime2.add(Calendar.DATE, -2);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    // 当前时间加2分钟
    public static String TimeRangeI10(String time,int m) throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(time));
        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());
    }

    // 当前时间加多少分钟
    public static String TimeRangeM(String time,int m) throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate2(time));
        nowTime2.add(Calendar.MINUTE, 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));
        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());
    }

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

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

    // 获取前天
    public static String getQianDay() throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(getTime()));
        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());
    }

    // 获取明天
    public static String getTomorrow() throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(getTime()));
        nowTime2.add(Calendar.DATE, 1);//5分钟前的时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    // 获取昨天
    public static String getYesturday()  {
        try {
            Calendar nowTime2 = Calendar.getInstance();
            nowTime2.setTime(StringToDate(getTime()));
            nowTime2.add(Calendar.DATE, -1);
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            return simpleDateFormat.format(nowTime2.getTime());
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    // 获取最近7个月
    public static List<String> getLastSevenMonth() throws ParseException {
        List<String> ls = new ArrayList<>();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM");
        for (int i = -6; i <= 0; i++) {
            Calendar nowTime2 = Calendar.getInstance();
            nowTime2.setTime(StringToDate(getTime()));
            nowTime2.add(Calendar.MONTH, i);//5分钟前的时间
            ls.add(simpleDateFormat.format(nowTime2.getTime()));
        }
        return ls;
    }

    public static String getTomorrowTime() throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(getTime()));
        nowTime2.add(Calendar.DATE, 1);//5分钟前的时间
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    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());
    }

    // 今天星期几
    public static String getWeek() throws ParseException {
        String[] weeks = {"7","1","2","3","4","5","6"};
        Calendar cal = Calendar.getInstance();
        cal.setTime(StringToDate(getTime()));
        int week_index = cal.get(Calendar.DAY_OF_WEEK) - 1;
        if(week_index<0){
            week_index = 0;
        }
        return weeks[week_index];
    }

    // 明天星期几
    public static String getTomorrowWeek() throws ParseException {
        String[] weeks = {"7","1","2","3","4","5","6"};
        Calendar cal = Calendar.getInstance();
        cal.setTime(StringToDate(getTomorrowTime()));
        int week_index = cal.get(Calendar.DAY_OF_WEEK) - 1;
        if(week_index<0){
            week_index = 0;
        }
        return weeks[week_index];
    }

    // 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()));
        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());
    }

    // 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);
    }

    /**
     * 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;
    }

    /**
     * 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;

    }

    /**
     * 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);
            System.out.println(dateStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dateStr;
    }

    /**
     * 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
     * @return
     * @throws ParseException
     */
    public static boolean CompareDate(String dateOne, String dateTwo) throws ParseException {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date sd1=df.parse(dateOne);
        Date sd2=df.parse(dateTwo);
        return sd1.before(sd2);
    }

    /**
     * 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);
    }

    /**
     * 时间加减天数
     *
     * @param time   时间
     * @param amount 天数 负的为减多少天 正的为加多少天
     * @return
     * @throws ParseException
     */
    public static String TimeDesD(String time, int amount) throws ParseException {
        Calendar nowTime2 = Calendar.getInstance();
        nowTime2.setTime(StringToDate(time, "yyyy-MM-dd"));
        nowTime2.add(Calendar.DATE, amount);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        return simpleDateFormat.format(nowTime2.getTime());
    }

    /**
     * 相差的天数
     */
    public static int daysBetween(String smdate, String bdate) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar cal = Calendar.getInstance();
        cal.setTime(sdf.parse(smdate));
        long time1 = cal.getTimeInMillis();
        cal.setTime(sdf.parse(bdate));
        long time2 = cal.getTimeInMillis();
        long between_days = (time2 - time1) / (1000 * 3600 * 24);

        return Integer.parseInt(String.valueOf(between_days));
    }

    /**
     * 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());
        return new String[]{startTime, endTime};
    }

    /**
     * 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)));
        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());

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

    public static List<String> getHighTime(){
        String year = getYear();
        return Arrays.asList(year+"-"+"08-30",year+"-"+"08-31",year+"-"+"09-01",year+"-"+"09-02",year+"-"+"09-03",year+"-"+"09-04");
    }

    public static List<String> getDays(String startTime, String endTime) {
        // 返回的日期集合
        List<String> days = new ArrayList<String>();
        DateFormat dateFormat = 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.DATE, 0);// 日期加1(包含结束)
            while (tempStart.before(tempEnd)) {
                days.add(dateFormat.format(tempStart.getTime()));
                tempStart.add(Calendar.DAY_OF_YEAR, 1);
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return days;
    }


    public static void main(String[] args) throws ParseException {
        char a = 'A';
        char b = 'B';
        int result = b -a;

        String s = "ZY";
        int ans = 0;
        for(int i=0;i<s.length();i++) {
            int num = s.charAt(i) - 'A' + 1;
            ans = ans * 26 + num;
        }

        System.out.println(ans);
    }

}