hyperprice
hyperprice
2012-06-11 11:32

java取当前周期、月初至月末、季度初至季度末日期。

已采纳

需求1: 当前登陆日期的周一至周五的日期 比如 现在是2012-06-11 周一是2012-06-11 周五就是 2012-06-15。

需求2: 月初至月末。 同上。 当前登陆的时间算出月初和月末的时间。

需求3: 季度初和季度末。 同上。 当前登陆时间算出季度的第一天和季度末的最后一天。

求函数。 谢谢。。 整了1天多没整出来。。。 时间不够了就上来发个需求。。

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5条回答

  • cmyx2008love 晓星 9年前

    我给你写了个,参考一下嘛:
    [code="java"]
    Calendar calendar = new GregorianCalendar();
    // 1. 当前登陆日期的周一至周五的日期 比如 现在是2012-06-11 周一是2012-06-11 周五就是 2012-06-15。
    calendar.set(Calendar.DAY_OF_WEEK, 2);
    System.out.println("登录日期的周一:" + print(calendar.getTime()));
    // 2.星期五,第六天s
    calendar.set(Calendar.DAY_OF_WEEK, 6);
    System.out.println("登录日期的周五:" + print(calendar.getTime()));
    // 3.当前月的第一天
    calendar.set(Calendar.DAY_OF_MONTH, 1);
    System.out.println("当前月的第一天:" + print(calendar.getTime()));
    // 4.当前月的最后一天
    calendar.add(Calendar.MONTH, 1);
    calendar.set(Calendar.DAY_OF_MONTH, 0);
    System.out.println("当前月的最后一天:" + print(calendar.getTime()));

        // 季度初
        calendar.setTime(new Date());
        int month = getQuarterInMonth(calendar.get(Calendar.MONTH), true);
        calendar.set(Calendar.MONTH, month);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        System.out.println("当季度的第一天:" + print(calendar.getTime()));
        // 季度末
        calendar.setTime(new Date());
        month = getQuarterInMonth(calendar.get(Calendar.MONTH), false);
        calendar.set(Calendar.MONTH, month + 1);
        calendar.set(Calendar.DAY_OF_MONTH, 0);
        System.out.println("当前时间的季度末:" + print(calendar.getTime()));
    }
    
    private static String print(Date d) {
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return df.format(d);
    }
    
    // 返回第几个月份,不是几月
    // 季度一年四季, 第一季度:2月-4月, 第二季度:5月-7月, 第三季度:8月-10月, 第四季度:11月-1月
    private static int getQuarterInMonth(int month, boolean isQuarterStart) {
        int months[] = { 1, 4, 7, 10 };
        if (!isQuarterStart) {
            months = new int[] { 3, 6, 9, 12 };
        }
        if (month >= 2 && month <= 4)
            return months[0];
        else if (month >= 5 && month <= 7)
            return months[1];
        else if (month >= 8 && month <= 10)
            return months[2];
        else
            return months[3];
    }[/code]
    
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  • feng_jyie feng_jyie 9年前

    去看下 joda-time.jar 吧

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  • iteye_9219 iteye_9219 9年前

    [code="java"]
    /**
    * 获取指定日期所在周的周一
    * @Methods Name getMonday
    * @return Date
    /
    public Date getMonday(Date date){
    Calendar cDay = Calendar.getInstance();

    cDay.setTime(date);

    cDay.set(Calendar.DAY_OF_WEEK, 2);//老外将周日定位第一天,周一取第二天
    return cDay.getTime();

    }
    /
    *
    * 获取指定日期所在周日
    * @Methods Name getSunday
    * @return Date
    /
    public Date getSunday(Date date){
    Calendar cDay = Calendar.getInstance();

    cDay.setTime(date);
    if(Calendar.DAY_OF_WEEK==cDay.getFirstDayOfWeek()){ //如果刚好是周日,直接返回
    return date;
    }else{//如果不是周日,加一周计算
    cDay.add(Calendar.DAY_OF_YEAR, 7);
    cDay.set(Calendar.DAY_OF_WEEK, 1);
    System.out.println(cDay.getTime());
    return cDay.getTime();
    }

    }
    /
    *
    * 得到本月第一天的日期
    * @Methods Name getFirstDayOfMonth
    * @return Date
    /
    public Date getFirstDayOfMonth(Date date) {

    Calendar cDay = Calendar.getInstance();

    cDay.setTime(date);
    cDay.set(Calendar.DAY_OF_MONTH, 1);
    System.out.println(cDay.getTime());
    return cDay.getTime();

    }

    /
    *
    * 得到本月最后一天的日期
    * @Methods Name getLastDayOfMonth
    * @return Date
    /
    public Date getLastDayOfMonth(Date date) {

    Calendar cDay = Calendar.getInstance();

    cDay.setTime(date);
    cDay.set(Calendar.DAY_OF_MONTH, cDay.getActualMaximum(Calendar.DAY_OF_MONTH));
    System.out.println(cDay.getTime());
    return cDay.getTime();

    }
    /
    *
    * 得到本季度第一天的日期
    * @Methods Name getFirstDayOfQuarter
    * @return Date
    /
    public Date getFirstDayOfQuarter(Date date) {

    Calendar cDay = Calendar.getInstance();

    cDay.setTime(date);
    int curMonth = cDay.get(Calendar.MONTH);
    if (curMonth >= Calendar.JANUARY && curMonth <= Calendar.MARCH){

    cDay.set(Calendar.MONTH, Calendar.JANUARY);
    }
    if (curMonth >= Calendar.APRIL && curMonth <= Calendar.JUNE){

    cDay.set(Calendar.MONTH, Calendar.APRIL);
    }
    if (curMonth >= Calendar.JULY && curMonth <= Calendar.AUGUST) {

    cDay.set(Calendar.MONTH, Calendar.JULY);
    }
    if (curMonth >= Calendar.OCTOBER && curMonth <= Calendar.DECEMBER) {

    cDay.set(Calendar.MONTH, Calendar.OCTOBER);
    }
    cDay.set(Calendar.DAY_OF_MONTH, cDay.getActualMinimum(Calendar.DAY_OF_MONTH));
    System.out.println(cDay.getTime());
    return cDay.getTime();

    }
    /
    *
    * 得到本季度最后一天的日期
    * @Methods Name getLastDayOfQuarter
    * @return Date
    */
    public Date getLastDayOfQuarter(Date date) {

    Calendar cDay = Calendar.getInstance();

    cDay.setTime(date);
    int curMonth = cDay.get(Calendar.MONTH);
    if (curMonth >= Calendar.JANUARY && curMonth <= Calendar.MARCH){

    cDay.set(Calendar.MONTH, Calendar.MARCH);
    }
    if (curMonth >= Calendar.APRIL && curMonth <= Calendar.JUNE){

    cDay.set(Calendar.MONTH, Calendar.JUNE);
    }
    if (curMonth >= Calendar.JULY && curMonth <= Calendar.AUGUST) {

    cDay.set(Calendar.MONTH, Calendar.AUGUST);
    }
    if (curMonth >= Calendar.OCTOBER && curMonth <= Calendar.DECEMBER) {

    cDay.set(Calendar.MONTH, Calendar.DECEMBER);
    }
    cDay.set(Calendar.DAY_OF_MONTH, cDay.getActualMaximum(Calendar.DAY_OF_MONTH));
    System.out.println(cDay.getTime());
    return cDay.getTime();

    }
    [/code]

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  • iteye_9873 iteye_9873 9年前

    [code="java"]package com.bruce.test.testcalendar;

    import java.text.DateFormat;
    import java.text.ParsePosition;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.GregorianCalendar;

    /**

    • 常用日历操作辅助类
    • @author steven 2010-08-10
    • @email:qing.tan@iwode.com
      */
      public class CalendarUtil {

      private int weeks = 0;// 用来全局控制 上一周,本周,下一周的周数变化
      private int MaxDate; // 一月最大天数
      private int MaxYear; // 一年最大天数

      /**

      • 测试
      • @param args */ @SuppressWarnings("static-access") public static void main(String[] args) { CalendarUtil tt = new CalendarUtil(); System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd")); System.out.println("获取本周一日期:" + tt.getMondayOFWeek()); System.out.println("获取本周日的日期~:" + tt.getCurrentWeekday()); System.out.println("获取上周一日期:" + tt.getPreviousWeekday()); System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday()); System.out.println("获取下周一日期:" + tt.getNextMonday()); System.out.println("获取下周日日期:" + tt.getNextSunday()); System.out.println("获得相应周的周六的日期:" + tt.getNowTime("yyyy-MM-dd")); System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth()); System.out.println("获取本月最后一天日期:" + tt.getDefaultDay()); System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst()); System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd()); System.out.println("获取下月第一天日期:" + tt.getNextMonthFirst()); System.out.println("获取下月最后一天日期:" + tt.getNextMonthEnd()); System.out.println("获取本年的第一天日期:" + tt.getCurrentYearFirst()); System.out.println("获取本年最后一天日期:" + tt.getCurrentYearEnd()); System.out.println("获取去年的第一天日期:" + tt.getPreviousYearFirst()); System.out.println("获取去年的最后一天日期:" + tt.getPreviousYearEnd()); System.out.println("获取明年第一天日期:" + tt.getNextYearFirst()); System.out.println("获取明年最后一天日期:" + tt.getNextYearEnd()); System.out.println("获取本季度第一天:" + tt.getThisSeasonFirstTime(11)); System.out.println("获取本季度最后一天:" + tt.getThisSeasonFinallyTime(11)); System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:" + CalendarUtil.getTwoDay("2008-12-1", "2008-9-29")); System.out.println("获取当前月的第几周:" + tt.getWeekOfMonth()); System.out.println("获取当前年份:" + tt.getYear()); System.out.println("获取当前月份:" + tt.getMonth()); System.out.println("获取今天在本年的第几天:" + tt.getDayOfYear()); System.out.println("获得今天在本月的第几天(获得当前日):" + tt.getDayOfMonth()); System.out.println("获得今天在本周的第几天:" + tt.getDayOfWeek()); System.out.println("获得半年后的日期:" + tt.convertDateToString(tt.getTimeYearNext())); }

      /**

      • 获得当前年份
      • @return */ public static int getYear() { return Calendar.getInstance().get(Calendar.YEAR); }

      /**

      • 获得当前月份
      • @return */ public static int getMonth() { return Calendar.getInstance().get(Calendar.MONTH) + 1; }

      /**

      • 获得今天在本年的第几天
      • @return */ public static int getDayOfYear() { return Calendar.getInstance().get(Calendar.DAY_OF_YEAR); }

      /**

      • 获得今天在本月的第几天(获得当前日)
      • @return */ public static int getDayOfMonth() { return Calendar.getInstance().get(Calendar.DAY_OF_MONTH); }

      /**

      • 获得今天在本周的第几天
      • @return */ public static int getDayOfWeek() { return Calendar.getInstance().get(Calendar.DAY_OF_WEEK); }

      /**

      • 获得今天是这个月的第几周
      • @return */ public static int getWeekOfMonth() { return Calendar.getInstance().get(Calendar.DAY_OF_WEEK_IN_MONTH); }

      /**

      • 获得半年后的日期
      • @return */ public static Date getTimeYearNext() { Calendar.getInstance().add(Calendar.DAY_OF_YEAR, 183); return Calendar.getInstance().getTime(); }

      /**

      • 将日期转换成字符串
      • @param dateTime
      • @return */ public static String convertDateToString(Date dateTime) { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); return df.format(dateTime); }

      /**

      • 得到二个日期间的间隔天数
      • @param sj1
      • @param sj2
      • @return */ public static String getTwoDay(String sj1, String sj2) { SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd"); long day = 0; try { java.util.Date date = myFormatter.parse(sj1); java.util.Date mydate = myFormatter.parse(sj2); day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000); } catch (Exception e) { return ""; } return day + ""; }

      /**

      • 根据一个日期,返回是星期几的字符串
      • @param sdate
      • @return */ public static String getWeek(String sdate) { // 再转换为时间 Date date = CalendarUtil.strToDate(sdate); 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()); }

      /**

      • 将短时间格式字符串转换为时间 yyyy-MM-dd
      • @param strDate
      • @return */ public static Date strToDate(String strDate) { SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); ParsePosition pos = new ParsePosition(0); Date strtodate = formatter.parse(strDate, pos); return strtodate; }

      /**

      • 两个时间之间的天数
      • @param date1
      • @param date2
      • @return */ public static long getDays(String date1, String date2) { if (date1 == null || date1.equals("")) return 0; if (date2 == null || date2.equals("")) return 0; // 转换为标准时间 SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd"); java.util.Date date = null; java.util.Date mydate = null; try { date = myFormatter.parse(date1); mydate = myFormatter.parse(date2); } catch (Exception e) { } long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000); return day; }

      /**

      • 计算当月最后一天,返回字符串
      • @return
        */
        public String getDefaultDay() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);// 加一个月,变为下月的1号
        lastDate.add(Calendar.DATE, -1);// 减去一天,变为当月最后一天

        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 上月第一天
      • @return
        */
        public String getPreviousMonthFirst() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, -1);// 减一个月,变为下月的1号
        // lastDate.add(Calendar.DATE,-1);//减去一天,变为当月最后一天

        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获取当月第一天
      • @return
        */
        public String getFirstDayOfMonth() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得本周星期日的日期
      • @return
        */
        public String getCurrentWeekday() {
        weeks = 0;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
        Date monday = currentDate.getTime();

        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }

      /**

      • 获取当天时间
      • @param dateformat
      • @return */ public String getNowTime(String dateformat) { Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);// 可以方便地修改日期格式 String hehe = dateFormat.format(now); return hehe; }

      /**

      • 获得当前日期与本周日相差的天数
      • @return */ private int getMondayPlus() { Calendar cd = Calendar.getInstance(); // 获得今天是一周的第几天,星期日是第一天,星期二是第二天...... int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; // 因为按中国礼拜一作为第一天所以这里减1 if (dayOfWeek == 1) { return 0; } else { return 1 - dayOfWeek; } }

      /**

      • 获得本周一的日期
      • @return
        */
        public String getMondayOFWeek() {
        weeks = 0;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus);
        Date monday = currentDate.getTime();

        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }

      /**

      • 获得相应周的周六的日期
      • @return */ public String getSaturday() { int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得上周星期日的日期
      • @return */ public String getPreviousWeekSunday() { weeks = 0; weeks--; int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得上周星期一的日期
      • @return */ public String getPreviousWeekday() { weeks--; int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得下周星期一的日期 */ public String getNextMonday() { weeks++; int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + 7); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得下周星期日的日期
        */
        public String getNextSunday() {

        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }

      @SuppressWarnings("unused")
      private int getMonthPlus() {
      Calendar cd = Calendar.getInstance();
      int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
      cd.set(Calendar.DATE, 1);// 把日期设置为当月第一天
      cd.roll(Calendar.DATE, -1);// 日期回滚一天,也就是最后一天
      MaxDate = cd.get(Calendar.DATE);
      if (monthOfNumber == 1) {
      return -MaxDate;
      } else {
      return 1 - monthOfNumber;
      }
      }

      /**

      • 获得上月最后一天的日期
      • @return
        */
        public String getPreviousMonthEnd() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, -1);// 减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);// 日期回滚一天,也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得下个月第一天的日期
      • @return
        */
        public String getNextMonthFirst() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);// 减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得下个月最后一天的日期
      • @return
        */
        public String getNextMonthEnd() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);// 加一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);// 日期回滚一天,也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得明年最后一天的日期
      • @return
        */
        public String getNextYearEnd() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);// 加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        lastDate.roll(Calendar.DAY_OF_YEAR, -1);
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得明年第一天的日期
      • @return
        */
        public String getNextYearFirst() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);// 加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        str = sdf.format(lastDate.getTime());
        return str;

      }

      /**

      • 获得本年有多少天
      • @return */ @SuppressWarnings("unused") private int getMaxYear() { Calendar cd = Calendar.getInstance(); cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天 cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。 int MaxYear = cd.get(Calendar.DAY_OF_YEAR); return MaxYear; }

      private int getYearPlus() {
      Calendar cd = Calendar.getInstance();
      int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天
      cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
      cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
      int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
      if (yearOfNumber == 1) {
      return -MaxYear;
      } else {
      return 1 - yearOfNumber;
      }
      }

      /**

      • 获得本年第一天的日期
      • @return */ public String getCurrentYearFirst() { int yearPlus = this.getYearPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, yearPlus); Date yearDay = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preYearDay = df.format(yearDay); return preYearDay; }

      // 获得本年最后一天的日期 *
      public String getCurrentYearEnd() {
      Date date = new Date();
      SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
      String years = dateFormat.format(date);
      return years + "-12-31";
      }

      // 获得上年第一天的日期 *
      public String getPreviousYearFirst() {
      Date date = new Date();
      SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
      String years = dateFormat.format(date);
      int years_value = Integer.parseInt(years);
      years_value--;
      return years_value + "-1-1";
      }

      // 获得上年最后一天的日期
      public String getPreviousYearEnd() {
      weeks--;
      int yearPlus = this.getYearPlus();
      GregorianCalendar currentDate = new GregorianCalendar();
      currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks
      + (MaxYear - 1));
      Date yearDay = currentDate.getTime();
      DateFormat df = DateFormat.getDateInstance();
      String preYearDay = df.format(yearDay);
      return preYearDay;
      }

      /**

      • 获得本季度第一天
      • @param month
      • @return
        */
        public String getThisSeasonFirstTime(int month) {
        int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
        int season = 1;
        if (month >= 1 && month <= 3) {
        season = 1;
        }
        if (month >= 4 && month <= 6) {
        season = 2;
        }
        if (month >= 7 && month <= 9) {
        season = 3;
        }
        if (month >= 10 && month <= 12) {
        season = 4;
        }
        int start_month = array[season - 1][0];
        int end_month = array[season - 1][2];

        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        int years_value = Integer.parseInt(years);

        int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
        @SuppressWarnings("unused")
        int end_days = getLastDayOfMonth(years_value, end_month);
        String seasonDate = years_value + "-" + start_month + "-" + start_days;
        return seasonDate;

      }

      /**

      • 获得本季度最后一天
      • @param month
      • @return
        */
        @SuppressWarnings("unused")
        public String getThisSeasonFinallyTime(int month) {
        int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
        int season = 1;
        if (month >= 1 && month <= 3) {
        season = 1;
        }
        if (month >= 4 && month <= 6) {
        season = 2;
        }
        if (month >= 7 && month <= 9) {
        season = 3;
        }
        if (month >= 10 && month <= 12) {
        season = 4;
        }
        int start_month = array[season - 1][0];
        int end_month = array[season - 1][2];

        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        int years_value = Integer.parseInt(years);

        int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
        int end_days = getLastDayOfMonth(years_value, end_month);
        String seasonDate = years_value + "-" + end_month + "-" + end_days;
        return seasonDate;

      }

      /**

      • 获取某年某月的最后一天
      • @param year
      • @param month
      • @return 最后一天 */ private int getLastDayOfMonth(int year, int month) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { return 31; } if (month == 4 || month == 6 || month == 9 || month == 11) { return 30; } if (month == 2) { if (isLeapYear(year)) { return 29; } else { return 28; } } return 0; }

      /**

      • 是否闰年
      • @param year
      • @return */ public boolean isLeapYear(int year) { return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); }

      /**

      • 是否闰年
      • @param year
      • @return */ public boolean isLeapYear2(int year) { return new GregorianCalendar().isLeapYear(year); } } [/code] 摘自网络,希望能帮助你
    点赞 评论 复制链接分享
  • iteye_9873 iteye_9873 9年前

    package com.bruce.test.testcalendar;

    import java.text.DateFormat;
    import java.text.ParsePosition;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.GregorianCalendar;

    /**

    • 常用日历操作辅助类
    • @author steven 2010-08-10
    • @email:qing.tan@iwode.com
      */
      public class CalendarUtil {

      private int weeks = 0;// 用来全局控制 上一周,本周,下一周的周数变化
      private int MaxDate; // 一月最大天数
      private int MaxYear; // 一年最大天数

      /**

      • 测试
      • @param args */ @SuppressWarnings("static-access") public static void main(String[] args) { CalendarUtil tt = new CalendarUtil(); System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd")); System.out.println("获取本周一日期:" + tt.getMondayOFWeek()); System.out.println("获取本周日的日期~:" + tt.getCurrentWeekday()); System.out.println("获取上周一日期:" + tt.getPreviousWeekday()); System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday()); System.out.println("获取下周一日期:" + tt.getNextMonday()); System.out.println("获取下周日日期:" + tt.getNextSunday()); System.out.println("获得相应周的周六的日期:" + tt.getNowTime("yyyy-MM-dd")); System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth()); System.out.println("获取本月最后一天日期:" + tt.getDefaultDay()); System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst()); System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd()); System.out.println("获取下月第一天日期:" + tt.getNextMonthFirst()); System.out.println("获取下月最后一天日期:" + tt.getNextMonthEnd()); System.out.println("获取本年的第一天日期:" + tt.getCurrentYearFirst()); System.out.println("获取本年最后一天日期:" + tt.getCurrentYearEnd()); System.out.println("获取去年的第一天日期:" + tt.getPreviousYearFirst()); System.out.println("获取去年的最后一天日期:" + tt.getPreviousYearEnd()); System.out.println("获取明年第一天日期:" + tt.getNextYearFirst()); System.out.println("获取明年最后一天日期:" + tt.getNextYearEnd()); System.out.println("获取本季度第一天:" + tt.getThisSeasonFirstTime(11)); System.out.println("获取本季度最后一天:" + tt.getThisSeasonFinallyTime(11)); System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:" + CalendarUtil.getTwoDay("2008-12-1", "2008-9-29")); System.out.println("获取当前月的第几周:" + tt.getWeekOfMonth()); System.out.println("获取当前年份:" + tt.getYear()); System.out.println("获取当前月份:" + tt.getMonth()); System.out.println("获取今天在本年的第几天:" + tt.getDayOfYear()); System.out.println("获得今天在本月的第几天(获得当前日):" + tt.getDayOfMonth()); System.out.println("获得今天在本周的第几天:" + tt.getDayOfWeek()); System.out.println("获得半年后的日期:" + tt.convertDateToString(tt.getTimeYearNext())); }

      /**

      • 获得当前年份
      • @return */ public static int getYear() { return Calendar.getInstance().get(Calendar.YEAR); }

      /**

      • 获得当前月份
      • @return */ public static int getMonth() { return Calendar.getInstance().get(Calendar.MONTH) + 1; }

      /**

      • 获得今天在本年的第几天
      • @return */ public static int getDayOfYear() { return Calendar.getInstance().get(Calendar.DAY_OF_YEAR); }

      /**

      • 获得今天在本月的第几天(获得当前日)
      • @return */ public static int getDayOfMonth() { return Calendar.getInstance().get(Calendar.DAY_OF_MONTH); }

      /**

      • 获得今天在本周的第几天
      • @return */ public static int getDayOfWeek() { return Calendar.getInstance().get(Calendar.DAY_OF_WEEK); }

      /**

      • 获得今天是这个月的第几周
      • @return */ public static int getWeekOfMonth() { return Calendar.getInstance().get(Calendar.DAY_OF_WEEK_IN_MONTH); }

      /**

      • 获得半年后的日期
      • @return */ public static Date getTimeYearNext() { Calendar.getInstance().add(Calendar.DAY_OF_YEAR, 183); return Calendar.getInstance().getTime(); }

      /**

      • 将日期转换成字符串
      • @param dateTime
      • @return */ public static String convertDateToString(Date dateTime) { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); return df.format(dateTime); }

      /**

      • 得到二个日期间的间隔天数
      • @param sj1
      • @param sj2
      • @return */ public static String getTwoDay(String sj1, String sj2) { SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd"); long day = 0; try { java.util.Date date = myFormatter.parse(sj1); java.util.Date mydate = myFormatter.parse(sj2); day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000); } catch (Exception e) { return ""; } return day + ""; }

      /**

      • 根据一个日期,返回是星期几的字符串
      • @param sdate
      • @return */ public static String getWeek(String sdate) { // 再转换为时间 Date date = CalendarUtil.strToDate(sdate); 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()); }

      /**

      • 将短时间格式字符串转换为时间 yyyy-MM-dd
      • @param strDate
      • @return */ public static Date strToDate(String strDate) { SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); ParsePosition pos = new ParsePosition(0); Date strtodate = formatter.parse(strDate, pos); return strtodate; }

      /**

      • 两个时间之间的天数
      • @param date1
      • @param date2
      • @return */ public static long getDays(String date1, String date2) { if (date1 == null || date1.equals("")) return 0; if (date2 == null || date2.equals("")) return 0; // 转换为标准时间 SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd"); java.util.Date date = null; java.util.Date mydate = null; try { date = myFormatter.parse(date1); mydate = myFormatter.parse(date2); } catch (Exception e) { } long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000); return day; }

      /**

      • 计算当月最后一天,返回字符串
      • @return
        */
        public String getDefaultDay() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);// 加一个月,变为下月的1号
        lastDate.add(Calendar.DATE, -1);// 减去一天,变为当月最后一天

        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 上月第一天
      • @return
        */
        public String getPreviousMonthFirst() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, -1);// 减一个月,变为下月的1号
        // lastDate.add(Calendar.DATE,-1);//减去一天,变为当月最后一天

        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获取当月第一天
      • @return
        */
        public String getFirstDayOfMonth() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得本周星期日的日期
      • @return
        */
        public String getCurrentWeekday() {
        weeks = 0;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
        Date monday = currentDate.getTime();

        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }

      /**

      • 获取当天时间
      • @param dateformat
      • @return */ public String getNowTime(String dateformat) { Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);// 可以方便地修改日期格式 String hehe = dateFormat.format(now); return hehe; }

      /**

      • 获得当前日期与本周日相差的天数
      • @return */ private int getMondayPlus() { Calendar cd = Calendar.getInstance(); // 获得今天是一周的第几天,星期日是第一天,星期二是第二天...... int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; // 因为按中国礼拜一作为第一天所以这里减1 if (dayOfWeek == 1) { return 0; } else { return 1 - dayOfWeek; } }

      /**

      • 获得本周一的日期
      • @return
        */
        public String getMondayOFWeek() {
        weeks = 0;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus);
        Date monday = currentDate.getTime();

        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }

      /**

      • 获得相应周的周六的日期
      • @return */ public String getSaturday() { int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得上周星期日的日期
      • @return */ public String getPreviousWeekSunday() { weeks = 0; weeks--; int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得上周星期一的日期
      • @return */ public String getPreviousWeekday() { weeks--; int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得下周星期一的日期 */ public String getNextMonday() { weeks++; int mondayPlus = this.getMondayPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, mondayPlus + 7); Date monday = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preMonday = df.format(monday); return preMonday; }

      /**

      • 获得下周星期日的日期
        */
        public String getNextSunday() {

        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }

      @SuppressWarnings("unused")
      private int getMonthPlus() {
      Calendar cd = Calendar.getInstance();
      int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
      cd.set(Calendar.DATE, 1);// 把日期设置为当月第一天
      cd.roll(Calendar.DATE, -1);// 日期回滚一天,也就是最后一天
      MaxDate = cd.get(Calendar.DATE);
      if (monthOfNumber == 1) {
      return -MaxDate;
      } else {
      return 1 - monthOfNumber;
      }
      }

      /**

      • 获得上月最后一天的日期
      • @return
        */
        public String getPreviousMonthEnd() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, -1);// 减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);// 日期回滚一天,也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得下个月第一天的日期
      • @return
        */
        public String getNextMonthFirst() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);// 减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得下个月最后一天的日期
      • @return
        */
        public String getNextMonthEnd() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);// 加一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);// 日期回滚一天,也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得明年最后一天的日期
      • @return
        */
        public String getNextYearEnd() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);// 加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        lastDate.roll(Calendar.DAY_OF_YEAR, -1);
        str = sdf.format(lastDate.getTime());
        return str;
        }

      /**

      • 获得明年第一天的日期
      • @return
        */
        public String getNextYearFirst() {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);// 加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        str = sdf.format(lastDate.getTime());
        return str;

      }

      /**

      • 获得本年有多少天
      • @return */ @SuppressWarnings("unused") private int getMaxYear() { Calendar cd = Calendar.getInstance(); cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天 cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。 int MaxYear = cd.get(Calendar.DAY_OF_YEAR); return MaxYear; }

      private int getYearPlus() {
      Calendar cd = Calendar.getInstance();
      int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天
      cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
      cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
      int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
      if (yearOfNumber == 1) {
      return -MaxYear;
      } else {
      return 1 - yearOfNumber;
      }
      }

      /**

      • 获得本年第一天的日期
      • @return */ public String getCurrentYearFirst() { int yearPlus = this.getYearPlus(); GregorianCalendar currentDate = new GregorianCalendar(); currentDate.add(GregorianCalendar.DATE, yearPlus); Date yearDay = currentDate.getTime(); DateFormat df = DateFormat.getDateInstance(); String preYearDay = df.format(yearDay); return preYearDay; }

      // 获得本年最后一天的日期 *
      public String getCurrentYearEnd() {
      Date date = new Date();
      SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
      String years = dateFormat.format(date);
      return years + "-12-31";
      }

      // 获得上年第一天的日期 *
      public String getPreviousYearFirst() {
      Date date = new Date();
      SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
      String years = dateFormat.format(date);
      int years_value = Integer.parseInt(years);
      years_value--;
      return years_value + "-1-1";
      }

      // 获得上年最后一天的日期
      public String getPreviousYearEnd() {
      weeks--;
      int yearPlus = this.getYearPlus();
      GregorianCalendar currentDate = new GregorianCalendar();
      currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks
      + (MaxYear - 1));
      Date yearDay = currentDate.getTime();
      DateFormat df = DateFormat.getDateInstance();
      String preYearDay = df.format(yearDay);
      return preYearDay;
      }

      /**

      • 获得本季度第一天
      • @param month
      • @return
        */
        public String getThisSeasonFirstTime(int month) {
        int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
        int season = 1;
        if (month >= 1 && month <= 3) {
        season = 1;
        }
        if (month >= 4 && month <= 6) {
        season = 2;
        }
        if (month >= 7 && month <= 9) {
        season = 3;
        }
        if (month >= 10 && month <= 12) {
        season = 4;
        }
        int start_month = array[season - 1][0];
        int end_month = array[season - 1][2];

        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        int years_value = Integer.parseInt(years);

        int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
        @SuppressWarnings("unused")
        int end_days = getLastDayOfMonth(years_value, end_month);
        String seasonDate = years_value + "-" + start_month + "-" + start_days;
        return seasonDate;

      }

      /**

      • 获得本季度最后一天
      • @param month
      • @return
        */
        @SuppressWarnings("unused")
        public String getThisSeasonFinallyTime(int month) {
        int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
        int season = 1;
        if (month >= 1 && month <= 3) {
        season = 1;
        }
        if (month >= 4 && month <= 6) {
        season = 2;
        }
        if (month >= 7 && month <= 9) {
        season = 3;
        }
        if (month >= 10 && month <= 12) {
        season = 4;
        }
        int start_month = array[season - 1][0];
        int end_month = array[season - 1][2];

        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        int years_value = Integer.parseInt(years);

        int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
        int end_days = getLastDayOfMonth(years_value, end_month);
        String seasonDate = years_value + "-" + end_month + "-" + end_days;
        return seasonDate;

      }

      /**

      • 获取某年某月的最后一天
      • @param year
      • @param month
      • @return 最后一天 */ private int getLastDayOfMonth(int year, int month) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { return 31; } if (month == 4 || month == 6 || month == 9 || month == 11) { return 30; } if (month == 2) { if (isLeapYear(year)) { return 29; } else { return 28; } } return 0; }

      /**

      • 是否闰年
      • @param year
      • @return */ public boolean isLeapYear(int year) { return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); }

      /**

      • 是否闰年
      • @param year
      • @return */ public boolean isLeapYear2(int year) { return new GregorianCalendar().isLeapYear(year); } }

    摘自网络,希望能帮助你!

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