日期驗證

        /*//正則驗證日期
        String str = "up_time";
        String path = "\\d{4}-\\d{2}-\\d{2}";//定義匹配規則
        Pattern p = Pattern.compile(path);//實例化Pattern
        Matcher m = p.matcher(str);//驗證字符串內容是否合法
     if (m.matches())//使用正則驗證
        {
        //驗證正確說明是String"2018-09-12"
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date utilDate = null;
        try {
            utilDate = sdf.parse(up_time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //查看utilDate的值
        Date date = new java.sql.Date(utilDate.getTime());
        System.out.println(date);
    } else {
        //否則說明是"Fri Sep 28 2018 00:00:00 GMT+0800 (中國標準時間)"
        //String dateString = "up_time";
        SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss 'GMT'Z", Locale.ENGLISH);
        Date dd = null;
        try {
            dd = sdf.parse(up_time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //將字符串改爲date的格式
        String resDate = new SimpleDateFormat("yyyy-MM-dd").format(dd);
        
        
        //將字符串轉爲Date
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date utilDate = null;
        try {
            utilDate = sdf.parse(up_time);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //查看utilDate的值
        Date date = new java.sql.Date(utilDate.getTime());
        System.out.println(date);
        System.out.println("輸入的日期格式不合法！");
    }
}*/


 /*   System.out.println(up_time);
   // String dateString = "up_time";
    SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss 'GMT'Z", Locale.ENGLISH);
    Date dd = null;
    try {
        dd = sdf.parse(up_time);
    } catch (ParseException e) {
        e.printStackTrace();
    }
    //將字符串改爲date的格式
    String resDate = new SimpleDateFormat("yyyy-MM-dd").format(dd);*/


    //將String轉爲Date
  
 /*   String dateString = "up_time";
    SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss 'GMT'Z", Locale.ENGLISH);
    Date dd = null;
    try {
        dd = sdf.parse(dateString);
    } catch (ParseException e) {
        e.printStackTrace();
    }
    //將字符串改爲date的格式
    String resDate= new SimpleDateFormat("yyyy-MM-dd").format(dd);
    System.out.println(resDate);*/