java 日期格式化工具类

客官°小女子只卖身不卖艺 2023-02-27 15:54 40阅读 0赞

### java 日期格式化工具类 ###

*   *  代码如下

## 代码如下 ##

package com.dongao.project.utils;
    
    import com.ruoyi.common.utils.StringUtils;
    import org.apache.commons.lang3.time.DateFormatUtils;
    
    import java.lang.management.ManagementFactory;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    
    /**
     * @Version 1.0
     * @Date 2019-08-19
     **/
    public class DateUtils extends org.apache.commons.lang3.time.DateUtils
    {
        public static final String YYYY = "yyyy";
    
        public static final String YYYY_MM = "yyyy-MM";
    
        public static final String YYYY_MM_DD = "yyyy-MM-dd";
    
        public static final String YYYY_MM_DD_HH_MM = "yyyyMMddHHmm";
    
        public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
    
        public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    
        public static final String MM_DD_HH_MM = "MM-dd HH:mm";
    
        private static String[] parsePatterns = {
                "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
                "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
                "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};
    
        /**
         * 获取当前Date型日期
         *
         * @return Date() 当前日期
         */
        public static Date getNowDate()
        {
            return new Date();
        }
    
        /**
         * 获取当前日期, 默认格式为yyyy-MM-dd
         *
         * @return String
         */
        public static String getDate()
        {
            return dateTimeNow(YYYY_MM_DD);
        }
    
        public static final String getTime()
        {
            return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
        }
    
        public static final String getMmTime()
        {
            return dateTimeNow(YYYY_MM_DD_HH_MM);
        }
    
        public static final String dateTimeNow()
        {
            return dateTimeNow(YYYYMMDDHHMMSS);
        }
    
        public static final String dateTimeNow(final String format)
        {
            return parseDateToStr(format, new Date());
        }
    
        public static final String dateTime(final Date date)
        {
            return parseDateToStr(YYYY_MM_DD, date);
        }
    
        public static final String parseDateToStr(final String format, final Date date)
        {
            return new SimpleDateFormat(format).format(date);
        }
    
        public static final Date dateTime(final String format, final String ts)
        {
            try
            {
                return new SimpleDateFormat(format).parse(ts);
            }
            catch (ParseException e)
            {
                throw new RuntimeException(e);
            }
        }
    
        /**
         * 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");
        }
    
        /**
         * 日期路径 即年/月/日 如20180808
         */
        public static final String dateTime()
        {
            Date now = new Date();
            return DateFormatUtils.format(now, "yyyyMMdd");
        }
    
        /**
         * 日期型字符串转化为日期 格式
         */
        public static Date parseDate(Object str)
        {
            if (str == null)
            {
                return null;
            }
            try
            {
                return parseDate(str.toString(), parsePatterns);
            }
            catch (ParseException e)
            {
                return null;
            }
        }
    
        /**
         * 获取服务器启动时间
         */
        public static Date getServerStartDate()
        {
            long time = ManagementFactory.getRuntimeMXBean().getStartTime();
            return new Date(time);
        }
    
        /**
         * 计算两个时间差
         */
        public static String getDatePoor(Date endDate, Date nowDate)
        {
            long nd = 1000 * 24 * 60 * 60;
            long nh = 1000 * 60 * 60;
            long nm = 1000 * 60;
            // long ns = 1000;
            // 获得两个时间的毫秒时间差异
            long diff = endDate.getTime() - nowDate.getTime();
            // 计算差多少天
            long day = diff / nd;
            // 计算差多少小时
            long hour = diff % nd / nh;
            // 计算差多少分钟
            long min = diff % nd % nh / nm;
            // 计算差多少秒//输出结果
            // long sec = diff % nd % nh % nm / ns;
            return day + "天" + hour + "小时" + min + "分钟";
        }
    
        public static String getFormatDate(String format,Date date) {
            if (null != date) {
                if (StringUtils.isEmpty(format)) {
                    format = YYYY_MM_DD_HH_MM_SS;
                }
                String dateStr = parseDateToStr(format, date);
                return dateStr;
            }
            return "";
        }
    
        /**
         * 秒转小时分
         * @param second
         * @return
         */
        public static String getFormatTime(Long second) {
    
            if (second != null) {
    
                if(second < 3600) {//分
    
                    return NumFormat(second / 60) + "分";
                }
    
                if(second< 3600 * 24) {//时
    
                    return NumFormat(second/ 60 / 60) + "小时" + NumFormat(second/ 60 % 60) + "分";
                }
    
                if(second>= 3600 * 24) {//天
    
                    return NumFormat(second/ 60 / 60 /24) + "天" +NumFormat(second/ 60 / 60 % 24) + "小时" + NumFormat(second/ 60 % 60) + "分";
                }
            }
    
            return "--";
        }
    
        /**
         * 格式化时间
         * @param sec
         * @return
         */
        private static String NumFormat(long sec) {
            if (String.valueOf(sec).length() < 2){
                return "0"+sec;
            }else {
                return String.valueOf(sec);
            }
        }
    
        /**
         * 获取当前时间前面某天或者后面某天
         * @param date
         * @return
         */
        public static Date getOtherDay(Date date, int amount) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.add(Calendar.DAY_OF_MONTH,amount);
            Date time = calendar.getTime();
            return time;
        }
    
        /**
         * 获取当前时间月日 7.13
         * @param date
         * @return
         */
        public static String getMonthDay(Date date) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            //month从0开始
            int month = calendar.get(Calendar.MONTH) + 1;
            int day = calendar.get(Calendar.DAY_OF_MONTH);
            return month+"."+day;
        }
        /**
         * 获取周几
         * @param date
         * @return
         */
        public static String getWeek(Date date) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            int weekday = calendar.get(Calendar.DAY_OF_WEEK);
            String week = null;
            if (weekday == 1) {
                week = "周日";
            } else if (weekday == 2) {
                week = "周一";
            } else if (weekday == 3) {
                week = "周二";
            } else if (weekday == 4) {
                week = "周三";
            } else if (weekday == 5) {
                week = "周四";
            } else if (weekday == 6) {
                week = "周五";
            } else if (weekday == 7) {
                week = "周六";
            }
            return week;
        }
    
        /**
         * 根据日期字符串获取时间
         * @param str
         * @return
         */
        public static Date getDate(String str) {
            SimpleDateFormat sdf = new SimpleDateFormat(YYYY_MM_DD);
            Date parse = null;
            try {
                parse = sdf.parse(str);
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return parse;
        }
        /**
         * 根据日期字符串获取时间
         * @param format
         * @param str
         * @return
         */
        public static Date getDate(String format,String str) {
            if (StringUtils.isEmpty(format)) {
                format = YYYY_MM_DD_HH_MM_SS;
            }
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            Date parse = null;
            try {
                parse = sdf.parse(str);
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return parse;
        }
    
        /**
         * 格式化日期
         * @param format
         * @param date
         * @return
         */
        public static Date getChangeDate(String format,Date date) {
            if (null != date) {
                if (StringUtils.isEmpty(format)) {
                    format = YYYY_MM_DD_HH_MM_SS;
                }
                String dateStr = parseDateToStr(format, date);
                Date resDate = getDate(format, dateStr);
                return resDate;
            }
            return null;
        }
    
        /**
         * 计算两个日期相差几天，不计算结束日期当天
         * @param start 开始时间
         * @param end 结束时间
         * @return
         */
        public static long getDiffDays(Date start,Date end) {
            long dayNum = 0;
            if (start != null && end != null) {
                //格式化时间
                Date startdate = getChangeDate(YYYY_MM_DD,start);
                Date enddate = getChangeDate(YYYY_MM_DD,end);
                //获取时间差
                long subtract = enddate.getTime() - startdate.getTime();
                //转换为天数
                dayNum = subtract / 1000 / 60 / 60 / 24;
            }
            return dayNum;
        }
    
        /**
         * 判断是不是本周
         * @param date
         * @return
         */
        public static boolean isThisWeek(Date date) {
            Calendar calendar = Calendar.getInstance();
            int currentWeek = calendar.get(Calendar.WEEK_OF_YEAR);
            calendar.setTime(date);
            int dateWeek = calendar.get(Calendar.WEEK_OF_YEAR);
            if (currentWeek == dateWeek) {
                return true;
            }
            return false;
        }
    
        /**
         * 判断是否是当天
         * @param date
         * @return
         */
        public static boolean isThisDay (Date date) {
            return isThisTime(date,YYYY_MM_DD);
        }
    
        /**
         * 判断是否是本月
         * @param date
         * @return
         */
        public static boolean isThisMonth (Date date) {
            return isThisTime(date,YYYY_MM);
        }
    
        /**
         * 判断当前时间
         * @param date
         * @param format
         * @return
         */
        private static boolean isThisTime(Date date, String format) {
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            String dateFormat = sdf.format(date);
            String nowFormat = sdf.format(new Date());
            if (dateFormat.equals(nowFormat)) {
                return true;
            }
            return false;
        }
    
    
    }

**注：** 可直接使用，如有问题欢迎交流，后续遇到好的会继续更新