Retrieve multiple checkbox values from jsp in the spring controller class

Question

In my table, I've a row with checkbox which tells the controller whether that particular row of the table has to be included or no. The check box does not have relation with other rows. I tried adding it in the following way :

<form:form id="fee" method="post" modelAttribute="clientForm" commandName = "clientForm" 
action="<%= request.getContextPath().toString()%>/addFee.do">

    <TABLE>
            <tr>
                <c:forEach var="type" items="${clientInfo}" varStatus="status">
                    <td><form:checkbox class="editable${ifeeCount}" path="includeFeeValue" value="false"/> </td>
                        <td>feeType<c:out value = "${status.index}"/></td>
                        <td>Source Fee<c:out value = "${status.index}"/></td>
                        <td><form:input class="editable${ifeeCount}" disabled="true" path="overriddenFee" /></td>
                            <td><form:errors path="overriddenFee" cssClass="error" /></td>
                </c:forEach>
            </tr>
    </TABLE>

And in my form, I've a list private ArrayList<String> includeFeeValue;

And i'm trying to retrieve this in the spring controller class as follows :

@RequestMapping(value="/addFee.do",method = RequestMethod.POST)
protected @ResponseBody ModelAndView selectValues(@ModelAttribute("clientForm") PaswFeeMaintenanceForm MyMaintForm ) throws Exception {

    for(int i=0;i<MyMaintForm.getIncludeFeeValue().size();i++){
        System.out.println("Checkbox : "+MyMaintForm.getIncludeFeeValue().get(i)+ " of "+i);
    }
}

Once I submit my form, it throws null pointer exception in here : MyMaintForm.getIncludeFeeValue().size() .

Could you tell me what's missing here?

@JaveDeveloper getIncludeFeeValue() is null for sure, maybe disabled="true" is not binding the value, try removing this and test again. — Ankur Singhal
– Ankur Singhal, Commented Sep 21, 2015 at 8:49
I tried after removing diabled=true. It's still the same.Null pointer exception — JaveDeveloper
– JaveDeveloper, Commented Sep 21, 2015 at 10:29

Vimal Bera · Accepted Answer · 2015-09-21 11:04:43Z

1

Remove disabled='true' and it will work. I faced the same problem with my textfield with property disabled as true.

And also use private String[] includeFeeValue instead of List.

edited Sep 21, 2015 at 11:04

answered Sep 21, 2015 at 9:14

Vimal Bera

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6 Comments

JaveDeveloper Over a year ago

I tried after removing diabled=true. It's still the same.Null pointer exception

Vimal Bera Over a year ago

Post your full spring form please.

Vimal Bera Over a year ago

Updated answer. Can you please use array instead of List and check?

JaveDeveloper Over a year ago

But the checkbox is within the for each loop. I've multiple entries and on click of submit I need the check box values of all the rows.

Vimal Bera Over a year ago

You can get that in Array as well. Though I'm not sure about it, but it worth a try.

|

Arvind Chavhan · Accepted Answer · 2015-09-21 09:34:21Z

0

As your checkbox is disabled, ans disabled elements values never flow to controller or Servlet. I advise you to remove a disabled attribute. I hope so it will work.

answered Sep 21, 2015 at 9:34

Arvind Chavhan

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1 Comment

JaveDeveloper Over a year ago

I tried after removing diabled=true. It's still the same.Null pointer exception

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