ModelAttribute Values are not populating values

Question

I have a form as shown below

    <!DOCTYPE html>
<html>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<head>
    <meta charset="utf-8" />
    <title>Dealer Details</title>
    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" />
    <link href="css/app.css" rel="stylesheet" />
    <script src="//code.jquery.com/jquery-2.0.3.min.js"></script>
    <script type="text/javascript">
        function onChange() {
            var value = ($("#jsonTextArea").text());
            alert(value);
            document.getElementById("jsonTextHidden").value = value;
        };
    </script>
</head>
<body class="body-bg">
    <form modelAttribute="jsonString" method="post" action="postHome">
        <div class="container">
            <div class="col-sm-8 col-sm-offset-2">
                <div class="row">
                    <div class="col-md-6 col-md-offset-3">
                        <div class="centerediv">
                            <div class="panel panel-default">
                                <div class="panel-heading">
                                    <h3 class="panel-title">Select Home</h3>
                                </div>
                                <div class="panel-body">
                                    <div class="form-group">
                                        <textarea rows="4" cols="40" name="jsonTextArea"></textarea>
                                    </div>
                                    <input class="btn btn-danger" type="button" value="Cancel">
                                    <input class="btn btn-success" type="submit" value="Ok" onclick="onChange();">
                                    <input type=hidden id="jsonTextHidden" name="jsonTextHiddenField" />
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </form>
</body>
</html>

I have a controller class as shown below.

@Controller
public class HomeController {

    @RequestMapping(value = "/home", method = RequestMethod.GET)
    public String callHomePage() {
        return "home";
    }

    @POST
    @Consumes({MediaType.APPLICATION_XML})
    @RequestMapping(value = "/postHome")
    public ModelAndView postHomeList(@ModelAttribute("jsonString") HomeRequest request, @Context HttpServletRequest servletReq, @Context HttpServletResponse servletRes) {
        ModelAndView mav = null;
        System.out.println(request.getHomeId());
        return mav;
    }

}

In this home.jsp a textarea field is there where I can enter some values ( json string ). After submission the value for request.getHomeId() is coming as null. Can any one help me to solve this issue?

you have not assigned any field in jsp to `homeId` attribute — Fran Montero, Aug 04 '15 at 12:15
I am a beginner and not sure about the concept. I tried to process a Json request through REST console and it worked fine when I used @RequestBody. Similar way I want to get string in HomeRequest request object , is there any way to do that or should I parse the json in jsp itself and addit to the object. — JAVA_CAT, Aug 04 '15 at 12:25

score 1 · Accepted Answer · answered Aug 04 '15 at 12:48

Create a HomeRequestDTO e.g

public class HomeRequestDto {
  private Integer homeId;
  private String homeName;
 //your getter and setter
}

2.

@RequestMapping(value = "/home", method = RequestMethod.GET)
public String callHomePage(final Model model) {
    HomeRequestDto home = new HomeRequestDto();
    home.setHomeName("Princess Home");
    home.setHomeId(123);
    model.addAttribute("homeRequest", home);
    return "home";
}

3. your home.jsp

<form:form commandName="homeRequest" name="homeRequest" method="post" enctype="multipart/form-data" action="postHome" >

<spring:bind path="homeRequest.homeName">
    <form:textarea maxlength="100" path="${status.expression}"/>
</spring:bind>
<spring:bind path="homeRequest.homeId">
   <form:textarea maxlength="100" path="${status.expression}"/>
</spring:bind>              
<input type="submit" value="Submit" />

4.on submit your controller

@POST
@RequestMapping(value = "/postHome")
public String postHomeList(@ModelAttribute HomeRequestDto home,
        @Context HttpServletRequest servletReq, @Context HttpServletResponse servletRes) {
    System.out.println(home.getHomeId());
    System.out.println(home.getHomeName());
    return "home";
}

Thanks csarathe. Here I have one more issue. I have a json string which I will get it from one textArea and then this need to parse. When I was using @RequestBody it was working fine. For REST endpoint QueryParam is also working. But in the same way ModelAttribute is not working. — JAVA_CAT, Aug 04 '15 at 13:01
please check the difference between ModelAttribute and RequestBody http://stackoverflow.com/questions/13229584/requestbody-or-modelattribute-with-springrest-web-services — csarathe, Aug 04 '15 at 13:16
ModelAttribute is bound to Form and RequestBody refers to submitted data. — csarathe, Aug 04 '15 at 13:20

ModelAttribute Values are not populating values

1 Answers1