how to fetch data from dropdown into spring mvc controller

Question

I am working on Spring mvc and also new in this concept. I have a dropdown using unordered list and I want to get the data from the dropdown in Controller when i click the submitt button. I also have text field, which is very easy to get the test field into contoller using. but i dont know how to get the data from the drop down list. my jsp page is like this I have implemented html code like this

<form role="form" method="post" action="/Web/password.html">
    <fieldset>
        <div class="form-group input-group">
            <span class="input-group-addon">
                <i class="glyphicon glyphicon-user"></i>
            </span> 
            <input class="form-control" placeholder="User Name" name="userName" type="email" required="" autofocus="">
        </div>

        <div class="form-group input-group">
            <span class="input-group-addon">Applications</i></span>
            <div class="btn-group" id='btnn'>
                <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
                    <span data-bind="label">Select One Application</span>&nbsp;<span class="caret"></span>
                </button>
                <ul class="dropdown-menu" name="dropDown" role="menu" style="height:200px;overflow: auto;" >
                    <c:forEach var ="entry" items="${listOfApp }">
                        <li><a tabindex="-1" href=""><c:out value="${entry }" /></a></li>
                    </c:forEach>
                </ul>
            </div>
        </div>

    </fieldset>
</form>

and my controller is

@RequestMapping(value = "/password.html", method = RequestMethod.POST)

    public String submit(@RequestParam (value ="userName") String userName,
            @RequestParam ("dropDown") String dropDown) {   

        System.out.println(dropDown+" "+userName);

        return "Hi";

    }

I have used <li> as text field in controller. but on server it is showing error that it not getting the value from name 'dropdown'. If someone knows how to solve this then please help me.

does userName get populated?

Haim Raman
– Haim Raman

2014-12-08 05:13:54 +00:00
Commented Dec 8, 2014 at 5:13 — Haim Raman
– Haim Raman, Commented Dec 8, 2014 at 5:13
yes. There is no error in userName

user2409128
– user2409128

2014-12-08 05:15:02 +00:00
Commented Dec 8, 2014 at 5:15 — user2409128
– user2409128, Commented Dec 8, 2014 at 5:15

Haim Raman · Accepted Answer · 2014-12-08 08:57:20Z

1

Spring MVC will populate the model from html select, but your drop down is based on ul/li which are not html inputs.

If you can switch to select or spring tasgs form:select, form:option or form:options it will work. You will need to use the taglib for spring tags, place it on the top of your jsp

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

If you have to keep the ul/li you need to back it with an hidden field.

To use hidden remove the name dropDown from the ul. In javaScript attach an event listener on selection change and sync the ul/li with the hidden The hidden feild should have the name dropDown.

<input type="hidden" name="dropDown" />

Try the following link for hints http://www.mkyong.com/spring-mvc/spring-mvc-dropdown-box-example/

Spring related documentation http://docs.spring.io/spring/docs/current/spring-framework-reference/html/view.html

edited Dec 8, 2014 at 8:57

answered Dec 8, 2014 at 5:23

Haim Raman

12.1k8 gold badges52 silver badges78 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user2409128 Over a year ago

If want to change from Ul/li then so many thing i have to change in my jsp. Can you help me do it using hidden tag?

Collectives™ on Stack Overflow

how to fetch data from dropdown into spring mvc controller

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related