iden_server/src/main/java/com/iden/common/util/DateUtils.java

package com.iden.common.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 *  @description 时间控件
 * @author make Java
 */
public class DateUtils {
    private static final SimpleDateFormat yyyyMMddHHmmss = new SimpleDateFormat("yyyyMMddHHmmss");
    private static final SimpleDateFormat yyyyMMdd = new SimpleDateFormat("yyyyMMdd");
    private static final SimpleDateFormat yyyyMM = new SimpleDateFormat("yyyyMM");
    private static final SimpleDateFormat yyyy_MM_dd_HH_mm_ss = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    private static final SimpleDateFormat yyyy_MM_dd = new SimpleDateFormat("yyyy-MM-dd");

    /**
     * 一天毫秒数
     */
    private static final long ONE_DAY = 1000 *60* 60 * 24L;

    private DateUtils(){}
    /**
     * 俩个时间间隔天数
     * @param beginDate
     * @param endDate
     * @return
     */
    public static int getDaysGap(Date beginDate, Date endDate) {
        long beginTimeMillis = beginDate.getTime();
        long endTimeMills = endDate.getTime();
        long time = endTimeMills - beginTimeMillis;
        double day = (time *1.0D / ONE_DAY);
        return  (int)Math.floor(day);
    }

    /**
 　　 * 俩个时间间隔天数字符串的日期格式的计算
 　　 */
    public static int daysBetween(String smdate, String bdate) {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            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));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }

        /**
         * date日期过num天的日期
         * @param date
         * @param num
         * @return
         */
    public static Date dateGapDays(Date date, int num) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.add(5, num);
        return cal.getTime();
    }
    /**
     * 字符串格式日期转日期格式日期
     * @param date
     * @param pattern
     * @return
     */
    public static Date strToDate(String date,String pattern){
        if(isEmpty(date) || isEmpty(pattern)){
            return null ;
        }
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        try {
            return format.parse(date) ;
        } catch (ParseException e) {
            e.printStackTrace();
            return null ;
        }
    }
    /**
     * 日期转日期格式日期
     * @param date
     * @param pattern
     * @return
     */
    public static String formatToDateStr(Date date,String pattern) {
        if(date==null || isEmpty(pattern)){
            return null ;
        }else{
            SimpleDateFormat sd = new SimpleDateFormat(pattern);
            return sd.format(date);
        }
    }
    /**
     * 检查字符串
     * @param str
     * @return
     */
    private static boolean isEmpty(String str) {
        return null == str ? true : "".equals(str.replaceAll(" +", ""));
    }
    /**
     * 日期的间隔分钟
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static Long betweenDate(Date startDate, Date endDate) {
        return betweenDateSSS(startDate, endDate) / 1000/60;
    }
    /**
     * 日期的间隔毫秒数
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static long betweenDateSSS(Date startDate, Date endDate) {
        return null == startDate || null == endDate ? 0 : endDate.getTime() - startDate.getTime();
    }

    /**
     * 俩时间段之间的间隔秒数
     *
     * @param startTime(HH:mm:ss)
     * @param enTime(HH:mm:ss)
     * @return
     */
    public static long betweenTimeSS(String startTime, String enTime) {
        String dateStr = getCurrYyyy_MM_ddDate();
        String start = dateStr + " " + startTime;
        String end = dateStr + " " + enTime;
        Date startDate = strToDate(start,"yyyy-MM-dd HH:mm:ss");
        Date endDate = strToDate(end,"yyyy-MM-dd HH:mm:ss");

        return (endDate.getTime() - startDate.getTime()) /1000;
    }

    /**
     * 判断一个字符串是不是一个合法的日期格式
     *
     * @param str
     * @param pattern
     * @return
     */
    public static boolean isValidDate(String str,String pattern) throws ParseException{
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        try {
            format.setLenient(false);
            format.parse(str);
        } catch (ParseException e) {
            throw new java.text.ParseException("不是一个合法的日期格式",0);
        }
        return true;
    }
    /**
     * 根据毫秒数获取时间字符串
     * yyyy-MM-dd HH:mm:ss
     * @param millisecondTime
     * @return
     */
    public static String formatMillisecondTime(String millisecondTime){
        String time = String.valueOf(Long.valueOf(millisecondTime));
        return yyyy_MM_dd_HH_mm_ss.format(new Date(Long.valueOf(time)));
    }

    /**
     * 获取当时间并格式化为：yyyyMMddHHmmss格式
     *
     * @return 返回yyyyMMddHHmmss格式的时间字符串
     * @throws Exception
     */
    public static String getCurrYyyyMMddHHmmssDate() {
        return yyyyMMddHHmmss.format(new Date());
    }

    /**
     * 获取当时间并格式化为：yyyyMMdd格式
     *
     * @return 返回yyyyMMdd格式的时间字符串
     * @throws Exception
     */
    public static String getCurrYyyyMMddDate() {
        return yyyyMMdd.format(new Date());
    }

    /**
     * 获取昨天并格式化为：yyyyMMdd格式
     *
     * @return 返回yyyyMMdd格式的时间字符串
     * @throws Exception
     */
    public static String getYestodayYyyyMMddDate() {
        Calendar cal =  Calendar.getInstance();
        cal.add(Calendar.DATE,-1);
        String yesterday = yyyyMMdd.format(cal.getTime());
        return yesterday;
    }

    /**
     * 把字符串时间段转成日期时间
     * @param startTime
     * @param endTime
     * @return
     */
    public static Map<String,Date> convertDate(String startTime, String endTime) {
        Map<String,Date> map = new HashMap<>();
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");

            Calendar start = Calendar.getInstance();
            start.setTime(sdf.parse(startTime));

            Calendar end = Calendar.getInstance();
            end.setTime(sdf.parse(endTime));

            if (start.after(end)) { //跨天了
                end.add(Calendar.DATE,1);
            }

            map.put("startDate", start.getTime());
            map.put("endDate", end.getTime());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return map;
    }


    /**
     * 获取num天前date
     *
     * @return 返回yyyyMMdd格式的时间字符串
     * @throws Exception
     */
    public static Date getBeforeDates(int num) {
        Calendar cal =  Calendar.getInstance();
        cal.add(Calendar.DATE,-num);
       cal.getTime();
        return cal.getTime();
    }

    /**
     * 获取当时间并格式化为：yyyy-MM-dd格式
     *
     * @return 返回yyyy-MM-dd格式的时间字符串
     * @throws Exception
     */
    public static String getCurrYyyy_MM_ddDate() {
        return yyyy_MM_dd.format(new Date());
    }

    /**
            * 计算时间格式为：yyyy-MM-dd HH:mm:ss的时间差值
     *
             * @param startTime 开始时间
     * @param endTime   结束时间
     * @return 返回时间，单位秒
     * @throws Exception
     */
    public static long compute_yyyy_MM_ddHHmmssTime(String startTime, String endTime) throws Exception {
        Date startDate = yyyy_MM_dd_HH_mm_ss.parse(startTime);
        Date endDate = yyyy_MM_dd_HH_mm_ss.parse(endTime);
        return (endDate.getTime() - startDate.getTime()) / 1000L;
    }

    /**
     * 获取两个日期之间的所有日期（yyyyMMdd,yyyyMMdd）
     * @Description TODO
     * @param begin
     * @param end
     * @return
     * @author XuJD
     * @date 2017-4-1
     */
    public static List<String> getBetweenDates(String begin, String end) {
        List<String> result = new ArrayList<>();
        try {
            Date beginDate = yyyyMMdd.parse(begin);
            Date endDate = yyyyMMdd.parse(end);
            Calendar tempStart = Calendar.getInstance();
            tempStart.setTime(beginDate);

            while (beginDate.getTime() <= endDate.getTime()) {
                result.add(yyyyMMdd.format(tempStart.getTime()));
                tempStart.add(Calendar.DAY_OF_YEAR, 1);
                beginDate = tempStart.getTime();
            }
        } catch (Exception e){
            e.printStackTrace();
        }
        return result;
    }

    public static void main(String[] args) {
        Map map = convertDate("20:12:00","23:00:00");
        System.out.println(map);
    }
}