Java 计算日期之间天数周数月数年数列表

红太狼 2022-08-09 18:56 333阅读 0赞

import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.ArrayList;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.List;
    
    public class DateUtil {
        public static final String YYYYMM = "yyyy-MM";
        public static final String YYYYMMDD = "yyyy-MM-dd";
        public static final String YYYYMMDDHHMMSS = "yyyy-MM-dd HH:mm:ss";
    
        /**
         * 获取两个时间中连续日期-包含开始时间结束时间所在日期
         *
         * @param startDay yyyy-MM-dd
         * @param endDay   yyyy-MM-dd
         * @return
         */
        public static List<String> getDayList(String startDay, String endDay) {
            List<String> result = new ArrayList<>();
            result.add(startDay.substring(0, 10));
            if (startDay.equals(endDay)) {
                return result;
            }
            Calendar tempStart = Calendar.getInstance();
            tempStart.setTime(parseDate(startDay, null));
            tempStart.add(Calendar.DAY_OF_YEAR, 1);
    
            Calendar tempEnd = Calendar.getInstance();
            tempEnd.setTime(parseDate(endDay, null));
            while (tempStart.before(tempEnd)) {
                result.add(new SimpleDateFormat("yyyy-MM-dd").format(tempStart.getTime()));
                tempStart.add(Calendar.DAY_OF_YEAR, 1);
            }
            result.add(endDay.substring(0, 10));
            return result;
        }
    
        /**
         * 获取两个时间中连续周数-包含开始时间结束时间所在周数
         *
         * @param startWeek yyyy-0~53
         * @param endWeek   yyyy-1~53
         * @return
         */
        public static List<String> getWeekList(String startWeek, String endWeek) {
            List<String> result = new ArrayList<>();
            int sYear = Integer.parseInt(startWeek.substring(0, 4));// 开始年数
            int sWeek = Integer.parseInt(startWeek.substring(5, 7));// 开始周数
            int eYear = Integer.parseInt(endWeek.substring(0, 4));// 结束年数
            int eWeek = Integer.parseInt(endWeek.substring(5, 7));// 结束周数
            if (sYear == eYear) {// 开始、结束年数为同一年
                while (sWeek <= eWeek) {
                    result.add(sYear + "-" + formatIntStr(sWeek));
                    sWeek = sWeek + 1;
                }
            } else {// 开始、结束年数非同一年
                int sYearWeekNum = weekNumOfYear(sYear);// 开始年周总数
                while (sWeek <= sYearWeekNum) {// 开始年周数信息
                    result.add(sYear + "-" + formatIntStr(sWeek));
                    sWeek = sWeek + 1;
                }
                if ((eYear - sYear) > 1) {// 开始、结束年间隔大于 1
                    sYear = sYear + 1;
                    while (sYear < eYear) {
                        int tempWeekNum = weekNumOfYear(sYear);// 间隔年周总数
                        for (int i = 1; i <= tempWeekNum; i++) {
                            result.add(sYear + "-" + formatIntStr(i));
                        }
                        sYear = sYear + 1;
                    }
                }
                for (int i = 1; i <= eWeek; i++) {
                    result.add(eYear + "-" + formatIntStr(i));
                }
            }
            return result;
        }
    
        /**
         * 获取两个时间中连续月份-包含开始时间结束时间所在月份
         *
         * @param startMonth yyyy-MM
         * @param endMonth   yyyy-MM
         * @return
         */
        public static List<String> getMonthList(String startMonth, String endMonth) {
            ArrayList<String> result = new ArrayList<>();
            try {
                SimpleDateFormat sdf = new SimpleDateFormat(YYYYMM);//格式化为年月
                Calendar min = Calendar.getInstance();
                Calendar max = Calendar.getInstance();
    
                min.setTime(sdf.parse(startMonth));
                min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);
    
                max.setTime(sdf.parse(endMonth));
                max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);
    
                Calendar curr = min;
                while (curr.before(max)) {
                    result.add(sdf.format(curr.getTime()));
                    curr.add(Calendar.MONTH, 1);
                }
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return result;
        }
    
        /**
         * 获取两个时间中连续年份-包含开始时间结束时间所在年份
         *
         * @param startYear yyyy
         * @param endYear   yyyy
         * @return
         */
        public static List<String> getYearList(String startYear, String endYear) {
            ArrayList<String> result = new ArrayList<>();
            int start = Integer.parseInt(startYear);
            int end = Integer.parseInt(endYear);
            result.add(startYear);
            while (start < end) {
                start++;
                result.add(String.valueOf(start));
            }
            return result;
        }
    
        /**
         * 时间字符串转换为时间
         *
         * @param strDate
         * @param pattern
         * @return
         */
        public static Date parseDate(String strDate, String pattern) {
            Date date = null;
            try {
                if (pattern == null) {
                    pattern = YYYYMMDD;
                }
                SimpleDateFormat format = new SimpleDateFormat(pattern);
                date = format.parse(strDate);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return date;
        }
    
        /**
         * 获取一年周数
         *
         * @param year
         * @return
         */
        public static int weekNumOfYear(int year) {
            int weekNum = 0;
            int days = 365;
            int day = 0; // 判断是否闰年，闰年366天
            if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) {
                days = 366;
            }
            // 得到一年所有天数然后除以7
            day = days % 7 > 0 ? weekNum += 1 : weekNum;
            // 得到余下几天如果有余则周+1，否则不加
            weekNum += days / 7;
            //得到多少周
            return weekNum;
        }
    
        /**
         * 小于 10 数字前补 0
         *
         * @param formatInt
         * @return
         */
        public static String formatIntStr(int formatInt) {
            if (formatInt > 9) {
                return "" + formatInt;
            } else {
                return "0" + formatInt;
            }
        }
    
        public static void main(String[] args) {
            getDayList("2019-12-25", "2020-01-01").stream().forEach(str -> System.out.println(str));
            getWeekList("2018-50", "2020-05").stream().forEach(str -> System.out.println(str));
            getMonthList("2019-12", "2020-05").stream().forEach(str -> System.out.println(str));
            getYearList("2001", "2020").stream().forEach(str -> System.out.println(str));
        }
    }

--------------------

Mybatis 统计代码：

<select id="dayReportForm" resultType="java.util.Map">
            SELECT
                date_format(team.dispatch_time, '%Y-%m-%d') AS dayTime,
                COUNT(*) AS teamCountNum
            FROM
                fire_warn_team_rel AS team
            WHERE 1 = 1
                <if test="startTime != null and startTime != ''">
                    AND date_format(team.dispatch_time, '%Y-%m-%d') <![CDATA[ >= ]]> #{startTime}
                </if>
                <if test="endTime != null and endTime != ''">
                    AND date_format(team.dispatch_time, '%Y-%m-%d') <![CDATA[ <= ]]> #{endTime}
                </if>
                <if test="limitStart != null and limitStart != ''">
                    AND date_format(team.dispatch_time, '%Y-%m-%d') <![CDATA[ >= ]]> #{limitStart}
                </if>
                <if test="limitEnd != null and limitEnd != ''">
                    AND date_format(team.dispatch_time, '%Y-%m-%d') <![CDATA[ <= ]]> #{limitEnd}
                </if>
            GROUP BY
                date_format(team.dispatch_time, '%Y-%m-%d');
        </select>
    
        <select id="weekReportForm" resultType="java.util.Map">
            SELECT
                yearweek(team.dispatch_time, 3) AS weekTime,
                COUNT(*) AS teamCountNum
            FROM
                fire_warn_team_rel AS team
            WHERE 1 = 1
                <if test="startTime != null and startTime != ''">
                    AND yearweek(team.dispatch_time, 3) <![CDATA[ >= ]]> #{startTime}
                </if>
                <if test="endTime != null and endTime != ''">
                    AND yearweek(team.dispatch_time, 3) <![CDATA[ <= ]]> #{endTime}
                </if>
                <if test="limitStart != null and limitStart != ''">
                    AND yearweek(team.dispatch_time, 3) <![CDATA[ >= ]]> #{limitStart}
                </if>
                <if test="limitEnd != null and limitEnd != ''">
                    AND yearweek(team.dispatch_time, 3) <![CDATA[ <= ]]> #{limitEnd}
                </if>
            GROUP BY
                yearweek(team.dispatch_time, 3);
        </select>
    
        <select id="monthReportForm" resultType="java.util.Map">
            SELECT
                date_format(team.dispatch_time, '%Y-%m') AS monthTime,
                COUNT(*) AS teamCountNum
            FROM
                fire_warn_team_rel AS team
            WHERE 1 = 1
                <if test="startTime != null and startTime != ''">
                    AND date_format(team.dispatch_time, '%Y-%m') <![CDATA[ >= ]]> #{startTime}
                </if>
                <if test="endTime != null and endTime != ''">
                    AND date_format(team.dispatch_time, '%Y-%m') <![CDATA[ <= ]]> #{endTime}
                </if>
                <if test="limitStart != null and limitStart != ''">
                    AND date_format(team.dispatch_time, '%Y-%m') <![CDATA[ >= ]]> #{limitStart}
                </if>
                <if test="limitEnd != null and limitEnd != ''">
                    AND date_format(team.dispatch_time, '%Y-%m') <![CDATA[ <= ]]> #{limitEnd}
                </if>
            GROUP BY
                date_format(team.dispatch_time, '%Y-%m');
        </select>
    
        <select id="yearReportForm" resultType="java.util.Map">
            SELECT
                date_format(team.dispatch_time, '%Y') AS yearTime,
                COUNT(*) AS teamCountNum
            FROM
                fire_warn_team_rel AS team
            WHERE 1 = 1
                <if test="startTime != null and startTime != ''">
                    AND date_format(team.dispatch_time, '%Y') <![CDATA[ >= ]]> #{startTime}
                </if>
                <if test="endTime != null and endTime != ''">
                    AND date_format(team.dispatch_time, '%Y') <![CDATA[ <= ]]> #{endTime}
                </if>
                <if test="limitStart != null and limitStart != ''">
                    AND date_format(team.dispatch_time, '%Y') <![CDATA[ >= ]]> #{limitStart}
                </if>
                <if test="limitEnd != null and limitEnd != ''">
                    AND date_format(team.dispatch_time, '%Y') <![CDATA[ <= ]]> #{limitEnd}
                </if>
            GROUP BY
                date_format(team.dispatch_time, '%Y');
        </select>