Ajax Post Request之后@ModelAttribute始终为null

Question

我使用mvc spring作为表格。 一切正常，但我总是

  

@ModelAttribute EncondingModel encodingTABnet

为null。 当我看一下Ajax Call

  

$（＆＃39;＃encoding_form＆＃39）。序列（）

它有这个价值：

  

＆＃34;密码= asdfasdf＆安培;键= asdfasdfasdfasdfasdf＆＃34;

但在我的控制器中，Model始终为null。 有人能帮我找到问题吗？

Form.jsp：

<form:form id="encoding_form" modelAttribute="encodingTABnet" commandName="encodingTABnet" name="form-encoding-do">
    <form:input cssClass="password" type="text" placeholder="Passwort Plain" path="password"/>
    <form:input cssClass="key" type="text" placeholder="Secret Key" path="key"/>
    <br>
    <button type="button" class="btn" onclick="${ns}calculateForm()"><i class="tab-icon tab-icon-ok">Start encoding</i></button>

    <div class="error-message"></div>
</form:form>

view.jsp的

<portlet:actionURL var="calculatePasswordAjaxURL" windowState="EXCLUSIVE">
   <portlet:param name="action" value="calculateForm"/>
</portlet:actionURL>

<script> 
 function ${ns}calculateForm() {
    $.post("${calculatePasswordAjaxURL}", $('#encoding_form').serialize(), function (data) {
        container.html(data);
    });

 }
</script>

控制器：

@RenderMapping(params = "action=showForm")
public String showFormView(Model model, RenderRequest request, RenderResponse response) throws Exception {

    return ENCODING_FORM;
}

@ActionMapping(params = "action=showForm")
public void showForm(ActionRequest request, ActionResponse response, Model model) throws Throwable {

    final EncodingModel encoding = new EncodingModel();
    model.addAttribute("encodingTABnet", encoding);

    response.setRenderParameter("action", "showForm");
}

@ActionMapping(params = "action=calculateForm")
public void calculatePassword(@ModelAttribute EncodingModel encodingTABnet, BindingResult result,
                        ActionRequest actionRequest, ActionResponse actionResponse,
                        Model model, SessionStatus status) {

    allstuff =  new AllStuff();
    allstuff.setKey(encodingTABnet.getKey());
    allstuff.setPassword(encodingTABnet.getPassword());
    allstuff.setEncode(aes.encrypt(encodingTABnet.getPassword(), encodingTABnet.getKey()));

    status.setComplete();

    actionResponse.setRenderParameter("action", "showContent");
}

类别：

public class EncodingModel   {


private String password;
private String key;

public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
public String getKey() {
    return key;
}
public void setKey(String key) {
    this.key = key;
}

}