CalendarUtil 日历工具类

忘是亡心i 2022-10-22 09:24 168阅读 0赞

package com.hhh.framework.tools.utils;
    
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.ArrayList;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.GregorianCalendar;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    /**
     * 用于日历的工具类
     */
    public final class CalendarUtil {
        /**
         * yyyy-MM-dd
         */
        public final static String FORMAT_ONE = "yyyy-MM-dd"; //格式一
    
        /**
         * yyyy/MM/dd
         */
        public final static String FORMAT_TWO = "yyyy/MM/dd"; //格式二
    
        /**
         * yyyy-MM-dd HH:mm:ss
         */
        public final static String FORMAT_THREE = "yyyy-MM-dd HH:mm:ss"; //格式三
    
        /**
         * yyyy/MM/dd HH/mm/ss
         */
        public final static String FORMAT_FOUR = "yyyy/MM/dd HH/mm/ss"; //格式四
    
        /**
         * yyyyMMddHHmmss
         */
        public final static String FORMAT_FIVE = "yyyyMMddHHmmss"; //格式五
    
        /**
         * yyyy年MM月dd日
         */
        public final static String FORMAT_SIX = "yyyy年MM月dd日"; //格式六
    
        /**
         * yyyy-MM
         */
        public final static String FORMAT_SEVEN = "yyyy-MM"; //格式七
    
        private final static Map<String, SimpleDateFormat> FORMATTERS = new HashMap<>();
    
        static {
            FORMATTERS.put("yyyy-MM-dd", new SimpleDateFormat("yyyy-MM-dd"));
            FORMATTERS.put("yyyy/MM/dd", new SimpleDateFormat("yyyy/MM/dd"));
            FORMATTERS.put("yyyy-MM-dd HH:mm:ss", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
            FORMATTERS.put("yyyy/MM/dd HH/mm/ss", new SimpleDateFormat("yyyy/MM/dd HH/mm/ss"));
            FORMATTERS.put("yyyyMMddHHmmss", new SimpleDateFormat("yyyyMMddHHmmss"));
            FORMATTERS.put("yyyy年MM月dd日", new SimpleDateFormat("yyyy年MM月dd日"));
            FORMATTERS.put("yyyy-MM", new SimpleDateFormat("yyyy-MM"));
        }
    
        /**
         * 转化字符串至date对象
         * @param patten 格式
         * @return date对象
         * @throws ParseException 转换异常
         */
        public static Date getCurrentDate(String patten){
    
            SimpleDateFormat dateFormat = getDateFormat(patten);
            try {
                return dateFormat.parse(dateFormat.format(new Date()));
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return null;
        }
    
    
        /**
         * 转化字符串至date对象
         * @param dateStr 日期字符串
         * @param patten 格式
         * @return date对象
         * @throws ParseException 转换异常
         */
        public static Date parse(String dateStr, String patten){
            if (dateStr == null || dateStr.trim().equals("")) {
                return null;
            }
    
            SimpleDateFormat dateFormat = getDateFormat(patten);
            try {
                return dateFormat.parse(dateStr);
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return null;
        }
    
        /**
         * 格式化日期
         * @param date 日期值
         * @param patten 格式
         * @return 格式化日期
         */
        public static String format(Date date, String patten) {
            if (date == null) {
                return null;
            }
    
            SimpleDateFormat dateFormat = getDateFormat(patten);
            return dateFormat.format(date);
        }
    
        /**
         * 获取日期格式化的类
         * @param patten 日期格式
         * @return 日期格式化的类
         */
        private synchronized static SimpleDateFormat getDateFormat(String patten) {
            if (FORMATTERS.get(patten) == null) {
                FORMATTERS.put(patten, new SimpleDateFormat(patten));
            }
    
            return FORMATTERS.get(patten);
        }
    
        /**
         * 获取指定日期对应的星期中的天数
         *
         * @param date : 日期
         * @return 星期中的天数
         */
        public static String getDayOfWeek(Date date) throws Exception {
            if (date == null) {
                throw new Exception("无效的日期值(null)，无法获取对应的星期中的天数");
            } else {
                Calendar cal = Calendar.getInstance();
                cal.setTime(date);
    
                switch (cal.get(Calendar.DAY_OF_WEEK)) {
                    case Calendar.MONDAY:
                        return "星期一";
                    case Calendar.TUESDAY:
                        return "星期二";
                    case Calendar.WEDNESDAY:
                        return "星期三";
                    case Calendar.THURSDAY:
                        return "星期四";
                    case Calendar.FRIDAY:
                        return "星期五";
                    case Calendar.SATURDAY:
                        return "星期六";
                    default:
                        return "星期日";
                }
            }
        }
    
        /**
         * 获取指定日期对应的当月中的第几周
         *
         * @param date : 日期
         * @return 月中的第几周
         */
        public static String getWeekOfMonth(Date date) throws Exception {
            if (date == null) {
                throw new Exception("无效的日期值(null)，无法获取日期对应的当月中的第几周");
            } else {
                Calendar cal = Calendar.getInstance();
                cal.setTime(date);
    
                switch (cal.get(Calendar.WEEK_OF_MONTH)) {
                    case 1:
                        return "第一周";
                    case 2:
                        return "第二周";
                    case 3:
                        return "第三周";
                    case 4:
                        return "第四周";
                    default:
                        return "第五周";
                }
            }
        }
    
    
        /**
         * <p>
         * 说明:Date转String
         * @param date 日期
         * @param format 格式
         * @return
         * </p>
         */
        public static String dateToString(Date date, String format){
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            String s = "";
            if(!"".equals(date) && date != null){
                s = sdf.format(date);
            }
    
            return s;
        }
    
        /**
         * 得到指定年份的所有周末
         */
        public static List<Map<String,Date>> getWeekDayList(int year) {
            List<Map<String,Date>> listDate = new ArrayList<Map<String,Date>>();
            int i = 1;
            Calendar calendar = new GregorianCalendar(year, 0, 1);
            while (calendar.get(Calendar.YEAR) < year + 1) {
                Map<String,Date>map = new HashMap<>();
                calendar.set(Calendar.WEEK_OF_YEAR, i++);
                calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
                if (calendar.get(Calendar.YEAR) == year) {
                    map.put("sunday",calendar.getTime());
                }
                calendar.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
                if (calendar.get(Calendar.YEAR) == year) {
                    map.put("saturday",calendar.getTime());
                }
                listDate.add(map);
            }
            return listDate;
        }
    
        /**
         * @return
         * @description 获取当前日期
         */
        public static Date  getToDay(String format){
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            Date today = null;
            try {
                today = sdf.parse(sdf.format(new Date()));
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return today;
        }
    
    
        public static Date getYesterday(){
            Calendar c = Calendar.getInstance();
            c.add(Calendar.DAY_OF_MONTH,-1);
            return c.getTime();
        }
    
        public static Date addDay(Date date,int day){
            Calendar c =Calendar.getInstance();
            c.setTime(date);
            c.add(Calendar.DAY_OF_MONTH,day);
            return c.getTime();
        }
    
        /**
         * 判断是否是周五
         * @param dateStr
         * @return
         */
        public static boolean isFriday(String dateStr){
            Date date =parse(dateStr,FORMAT_ONE);
            Calendar cal =Calendar.getInstance();
            cal.setTime(date);
            return cal.get(Calendar.DAY_OF_WEEK)==Calendar.FRIDAY;
        }
    
        /**
         * 判断是否是周六
         * @param dateStr
         * @return
         */
        public static boolean isSaturday(String dateStr){
            Date date =parse(dateStr,FORMAT_ONE);
            Calendar cal =Calendar.getInstance();
            cal.setTime(date);
            return cal.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY;
        }
    
        /**
         * 判断是否是周日
         * @param dateStr
         * @return
         */
        public static boolean isSunday(String dateStr){
            Date date =parse(dateStr,FORMAT_ONE);
            Calendar cal =Calendar.getInstance();
            cal.setTime(date);
            return cal.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY;
        }
    
        /**
         * 工具类无需实例化
         */
        private CalendarUtil() {
    
        }
    
        public static void main(String[] args) {
    
    //        System.out.println(dateToString(getYesterday(),FORMAT_ONE)+" 00:00:00");
    //        System.out.println(dateToString(addDay(new Date(),2),FORMAT_THREE));
    
            System.out.println(isSaturday("2018-05-26"));
            System.out.println(isSunday("2018-05-26"));
        }
    }