[FIXED] How to auto format textbox inputs

Issue

<tr>
   <td><label>Birthdate</label>
      <input type="text" placeholder="mm/dd/yyyy" name="birthdate" maxlength="10"/>
   </td>
</tr>

Well, my code is working but I want my "input type text" to auto format like a date (html 5 input type=date) because in my Servlet I convert it to Age. The problem is that, if I use the "input type=date" the conversion is error so I decided to use "input type=text" and it's working. So is it possible to auto put "/" in this format "mm/dd/yyyy"? For example, if the user input 2 character an "/" will auto input etc.

---

Servlet for birthdate to Age

        String birthdate = request.getParameter("birthdate");


        int monthDOB = Integer.parseInt(birthdate.substring(0, 2));
        int dayDOB = Integer.parseInt(birthdate.substring(3, 5));
        int yearDOB = Integer.parseInt(birthdate.substring(6, 10));

        DateFormat dateFormat = new SimpleDateFormat("MM");
        java.util.Date date = new java.util.Date();
        int thisMonth = Integer.parseInt(dateFormat.format(date));

        dateFormat = new SimpleDateFormat("dd");
        date = new java.util.Date();
        int thisDay = Integer.parseInt(dateFormat.format(date));

        dateFormat = new SimpleDateFormat("YYYY");
        date = new java.util.Date();
        int thisYear = Integer.parseInt(dateFormat.format(date));

        int calAge = thisYear - yearDOB;

        if (thisMonth < monthDOB) {
            calAge = calAge - 1; 
        }

        if (thisMonth == monthDOB && thisDay < dayDOB) {
            calAge = calAge - 1;
        }

        String age = Integer.toString(calAge);

---

Update in the form

<tr>
    <td><label for="inputName">Birthdate</label>
       <input type="text" placeholder="mm/dd/yyyy" id="input_date" name="birthdate" maxlength="10"  />
    </td>
</tr>

Update in the source

<script src="../scripts/formatter.js"></script>
<script src="../scripts/formatter.min.js"></script>
<script src="../scripts/jquery.formatter.js"></script>
<script src="../scripts/jquery.formatter.min.js"></script>

Added Script

<script>
     $('#input_date').formatter({
       'pattern': '{{99}}/{{99}}/{{9999}}',
       'persistent': true
     });
</script>

I also tried the javascript but it's not working...

Solution

use datepicker api from jquery here is the link Datepicker

and here is the working code

<tr>
   <td><label>Birthdate</label>
      <input type="text" placeholder="mm/dd/yyyy" name="birthdate" id="birthdate" maxlength="10"/>
   </td>
</tr>

<script>
  $(function() {
    $( "#birthdate" ).datepicker();
  });
</script>

EDIT

$("input[name='birthdate']:first").keyup(function(e){
    var key=String.fromCharCode(e.keyCode);
    if(!(key>=0&&key<=9))$(this).val($(this).val().substr(0,$(this).val().length-1));
    var value=$(this).val();
    if(value.length==2||value.length==5)$(this).val($(this).val()+'/');
});

this is the code that you may need

here is the fiddled code

Answered By - user2897690
Answer Checked By - Katrina (JavaFixing Volunteer)