Null value when submitting form

Question

I have a three radio button in my JSP page. I am displaying multi select box based on radio button selected. But while submitting form, i am getting null value from two select box. Other select box is working fine.

Can anyone help me?

<script type="text/javascript">
$(document).ready(function(){
$('.show').hide();
$("input[name$='application']").click(function() {
var test = $(this).val();
$("div.show").hide();
$('#showemma').hide();
$('#showdmfota').hide();
$('#showuep').hide();
$("#show" + test).show();
   });
});
</script>
<title>Add Config Changes</title>
</head>
<body>
<%
    Server env = new Server();
    Map<String, List<String>> map = env.getServer();
    Properties property = new Properties();
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    property.load(classLoader.getResourceAsStream("error.properties"));
%>
<h3> Add Configuration Change</h3> <br><br>
<form action="_config" method="post">
<table align="center" id ="login">
    <tr>
        <td>Application</td>
            <td>
            <div class="radio" style="font-size:12px;">
                <label><input type="radio" name="application" id="fota" value="dmfota"> DMFOTA</label>
                <label><input type="radio" name="application" id="uep" value="uep"> UEP</label>
                <label><input type="radio" name="application" id="emma" value="emma"> EMMA</label>
                </div>
            </td>
        <td id="error"><p id ="applicationError"><%=property.getProperty("applicationError") %></p></td>
    </tr>           

    <% for (String serverNamekey : map.keySet()){%>
    <tr id="show<%= serverNamekey %>" class="show" style='display:none'>

        <td>Server</td>
            <td>
            <% List<String> servers = map.get(serverNamekey); %>
                <select name="server" id="server" multiple="multiple" style="width:150px; height: 150px;">
                    <%for (String serverName : servers){  %>
                        <option value="<%=serverName%>"><%=serverName%></option>
                    <%} %>
                </select> 
            </td> 
            <td id="error"><p id ="serverError"><%=property.getProperty("serverError") %></p></td>
    </tr>
            <%} %>
    <tr>
        <td colspan =2><input type="submit" value="Add Change Log"   id="configSubmit" class="submit"></td>
    </tr>
</table>
</form> 
</body>
</html>

</table>
</form> 
</body>

Your input name is always `name="server"` for all inputs, so for your id. You should provide unique for both. — Alexandre Lavoie, Jun 17 '13 at 14:42
@AlexandreLavoie: I have changed id and name to unqiue. It didnt worked. — Kalpesh, Jun 18 '13 at 14:38
Can you update the code in your question to see the changes? — Alexandre Lavoie, Jun 18 '13 at 19:05
Please [avoid](http://stackoverflow.com/q/3177733/1037210) this hateful scriptlets which is **highly** discouraged for over a decade. — Lion, Jun 19 '13 at 06:12
@PankajKathiriya Map> map = env.getServer(); I have a map which has list of server name as a key and list of servers as a string as a value. — Kalpesh, Jun 19 '13 at 07:11
@AlexandreLavoie Thank you. I have changed name and now its working fine. — Kalpesh, Jun 25 '13 at 10:56
@Kalpesh Excellent, note : I've rolled back your question and added the answer for the records. — Alexandre Lavoie, Jun 25 '13 at 12:17

score 1 · Accepted Answer · answered Jun 25 '13 at 12:14

As stated in the comments, your name attribute must be unique on all inputs, ortherwise, only one value will be take into account by the server. Moreover, id must also be unique.

I recommand to use the serverNameKey as unique name and id :

<select id="select-<%= serverNamekey %>" name="<%= serverNamekey %>" ...

Note that you need the same name attribute for all input type="radio", so that part is okay.

Not related to the problem, I also recommand to not use scriplets, you should read about JSTL. If it is a new project, I recommand usage of JSF which took over on JSP (that is deprecated).

I will look in to your suggestion. Thanks a lot !! – Kalpesh Jun 26 '13 at 11:23 — Kalpesh, Jun 26 '13 at 11:23

Null value when submitting form

1 Answers1