Get value of <select> in servlet

Question

I have:

<select id="isTitles">
    <option value="true">enable</option>
    <option value="false">disable</option>
</select>

on my index.jsp. And I would like to know what had been chosen:

response.getWriter().write( "User chose: " + request.getAttribute( "isTitles" ) );

But I've got "User chose: null"... = (

Answer 1

You need to pass the name of your attribute as name="isTitles"

<select name="isTitles">
</select>

request.getParameter() understands the name of the parameter

Answer 2

Change your HTML code to:

<select id="isTitles" name="isTitles" >

The id attribute of select tag is mainly for DOM usages, and name attribute is to specify the key of a form data.

And then use request.getParameter("isTitles"), your will get the right value. getParameter is for retrieving parameters from form data and URL query string. While getAttribute is for transfer data through the process chain during the request life cycle.