CODEWITHSUNDEEP
springspring-mvc
java_dude
java_dude

Reputation: 4088

spring:bind throws error when used in a list

I have a list containing users. I am trying to print it in JSP but some how I am not able to get it to print it using spring:bind. I get an exception. The reason I am trying to use spring:bind is to invole @Formatting annotation.

Code in JSP

<c:forEach items="${users}" var="user" varStatus="status">
   <spring:bind path="users[${status.index}].name">
      <c:out value="${status.value}" />
   </spring:bind>
</c:forEach>

Controller

ModelAndView modelAndView = new ModelAndView("go_some_JSP_page");
List<UserEntity> users = userManager.getAllObjects();
modelAndView.addObject("users", users);

BTW, UserEntity has name field. If I remove the binding and try to print the user.name using <c:out value="user.name" /> it prints the value

A test sample code exists at https://github.com/hth/StatusInvoke.git

Please take a look at landing.jsp line 35

Let me know if you face any problem deploying it.

Upvotes: 0

Views: 483

Answers (2)

java_dude
java_dude

Reputation: 4088

The correct answer to invoke @NumberFormat annotation is by using spring:eval expression tag

<spring:eval expression="user.balance" />

Upvotes: 0

Manuel Quinones
Manuel Quinones

Reputation: 4246

The only way I could get this to work is if the bean path that you are binding to is within the base command bean. In my case I am using MyForm which has a getter and setter for users. The spring bind tag does not seem to work outside of the base form command bean.

So your controller method needs to change to .

@RequestMapping(method = RequestMethod.GET)
public ModelAndView loadForm() {
    ModelAndView modelAndView = new ModelAndView("landing");
    MyForm myForm = new MyForm();
    myForm.setUsers(populate());
    modelAndView.addObject("myForm", myForm);
    return modelAndView;
}

In your jsp have the following.

<form:form commandName="myForm">
    <c:forEach var="user" items="${myForm.users}" varStatus="status">
        <tr>
            <td><spring:bind path="users[${status.index}].loginName">
                    <c:out value="${status.value}" />
                </spring:bind></td>
            <td><spring:bind path="users[${status.index}].balance">
                    <c:out value="${status.value}" />
                </spring:bind></td>
        </tr>
    </c:forEach>
</form:form>

Upvotes: 1

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