如何从jsp的下拉列表中获取价值？

Question

I am trying to get the value from a dropdown list in SetRole.jsp from SaveRole.jsp, but it kept return null. Does any one can see where the problem is?

This is the code I wrote: In SetRole.jsp

<form action="SaveRole.jsp">
    <select name = "test">
        <option value="a">a</option>
        <option value="b">b</option>
        <option value="c">c</option>
    </select>   
</form>

In SaveRole.jsp

<%= request.getParameter("test") %>

Thank you!!

Answer 1

Use

    <form action="SaveRole.jsp">
        <select name = "test">
            <option value="a">a</option>
            <option value="b">b</option>
            <option value="c">c</option>
        </select>  
    <input type="submit" value="Submit"> 

    </form>


<% request.getParameter("test") %>

Answer 2

<form action="SaveRole.jsp">
  <select name="test">
    <option value="a">a</option>
    <option value="b">b</option>
    <option value="c">c</option>
  </select>
  <input type="submit" value="Submit">
</form>

in SaveRole.jsp

request.getParameter("test");

This should work!