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  • Date()日期转换和简单计算

        /**

         * 判断是否为闰年

         * @param year

         * @return

         */

        public boolean isLeap ( int year )

        {

            if ( (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0) )

                return true;

            else

                return false;

        }

      /**

         * 判断某年某月总天数

         * @param year

         * @param month

         * @return

         */

        public int getDays ( int year , int month )     {

            int tianshu = 0;

            switch (month)

            {

                case 1:

                case 3:

                case 5:

                case 7:

                case 8:

                case 10:

                case 12:

                    tianshu = 31;

                    break;

                case 4:

                case 6:

                case 9:

                case 11:

                    tianshu = 30;

                    break;

                case 2:

                    if ( isLeap(year) == true )

                    {

                        tianshu = 29;

                    }

                    else

                    {

                        tianshu = 28;

                    }

                    break;

            }

            return tianshu;

        }

        /**

         * 在某Date()日期上增加几天或几个月

         * @return 新的日期

         */

     public static String changeDate(String str, int n) {

      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

      try {

       Calendar cd = Calendar.getInstance();

       cd.setTime(sdf.parse(str));

       cd.add(Calendar.DATE, n); // 在审批基础上增加一天

       // cd.add(Calendar.MONTH, n);//增加一个月

       return sdf.format(cd.getTime());

      } catch (Exception e) {

       Global.getInstance().LogError(e);

       return str;

      }

     }

     //两个Date()相加减

     public static void main(String[] args) {

         try {

       SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd");

       Date begin=dfs.parse("1992-08-10");

       Date end =  new Date();

       long between=(end.getTime()-begin.getTime())/1000;//除以1000是为了转换成秒

       long day1=between/(24*3600);       //几天

       long hour1=between%(24*3600)/3600; //零几小时

       long minute1=between%3600/60;      //零几分钟

       long second1=between%60/60;        //零几秒钟

    } catch (ParseException e) {

       e.printStackTrace();

    }

     }

     //输入某人生日计算实际年龄

     public static int getAge(String date) {

      try {

       SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd");

       Date begin = dfs.parse(date);

       int month = begin.getMonth() + 1;

       int day = begin.getDate();

       Date end = new Date();

       long between = (end.getTime() - begin.getTime()) / 1000;

       long day1 = between / (24 * 3600);

       int age = (int) (day1 / 365);

       long nmonth = end.getMonth() + 1;

       long nday = end.getDate();

       if (nmonth < month || (nmonth == month && day < nday)) {

        age--;

       }

       return age;

      } catch (Exception e) {

       e.printStackTrace();

       return 0;

      }

     }

    转成这样时间格式:二〇一四年九月二十一日

    this.getCurrentDate = function() {
            var today = new Date();
            var chinese = ['〇', '一', '二', '三', '四', '五', '六', '七', '八', '九'];
            var y = today.getFullYear().toString();
            var m = (today.getMonth() + 1).toString();
            var d = today.getDate().toString();
            var result = "";
            for (var i = 0; i < y.length; i++) {
                result += chinese[y.charAt(i)];
            }
            result += "年";
            if (m.length == 2) {
                if (m.charAt(0) == "1") {
                    result += ("十" + chinese[m.charAt(1)] + "月");
                }
            } else {
                result += (chinese[m.charAt(0)] + "月");
            }
            if (d.length == 2) {
                result += (chinese[d.charAt(0)] + "十" + chinese[d.charAt(1)] + "日");
            } else {
                result += (chinese[d.charAt(0)] + "日");
            }
            return result;
        };
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  • 原文地址:https://www.cnblogs.com/zhaojinhui/p/3928612.html
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