Question

我有一个portlet，它能够显示表单，然后允许传递给用户设置的对象中的控制器。它运作良好。我希望应用程序能够从jsp设置一个额外的属性，但不是来自表单的输入。

模型

public class Person {
    String firstName;
    String middleName;
    String attributeSetStatically;

    // Setters and getters

    public void setAttributeSetStatically(String attributeFromJsp)
    {
        System.out.println("Call setAttributeSetStatically  "+attributeFromJsp);
        this.attributeSetStatically=attributeFromJsp;
    }
}

控制器

@Controller(value = "MyFirstSpringMVCPortlet")
@RequestMapping("VIEW")
public class MyFirstSpringMVCPortlet {

    @RenderMapping
    public ModelAndView handleRenderRequest() {
        ModelAndView modelAndView = new ModelAndView("welcome");
        modelAndView.addObject("person", new Person());
        modelAndView.addObject("msg", "Hello Spring MVC");
        return modelAndView; 
    }


    @ActionMapping(value = "handleSubmitPerson")
    public void submitPerson(@ModelAttribute("person") Person person,ActionRequest actionRequest, ActionResponse actionResponse,Model model) {
            System.out.println("FirstName= "+person.getFirstName());
            System.out.println("MiddleName= "+person.getMiddleName());
            System.out.println("attributeSetStatically= "+person.getAttributeSetStatically());
    }

}

查看（的welcome.jsp）

<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<h1>${msg}</h1>
<portlet:defineObjects />
<portlet:actionURL var="submitFormURL" name="handleSubmitPerson"/>
<form:form name="person" method="post" modelAttribute="person" action="<%=submitFormURL.toString() %>">
${person.setAttributeSetStatically('attributeSetStatically of person')}
<br/>
    <table style="margin-left:80px">
        <tbody>
            <tr>
                <td><form:label path="firstName">First Name</form:label></td>
                <td><form:input path="firstName"></form:input></td>
            </tr>
            <tr>
                <td><form:label path="middleName">Middle Name</form:label></td>
                <td><form:input path="middleName"></form:input></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="Submit Form">
                </td>
            </tr>
        </tbody>
    </table>
</form:form>

我在控制台中得到的输出是：

FirstName= Kallel
MiddleName= Omar
attributeSetStatically= null
Call setAttributeSetStatically  attributeSetStatically of person

因此，在提交后调用$ {person.setAttributeSetStatically（'personSetStatically of person'）}。为什么？有解决方案可以做我想要的吗？

Answer 1

可以在表单内的隐藏输入中设置attributeSetStatically：

<form:input type="hidden" name="attributeSetStatically" value="attributeSetStatically of person">

Spring MVC表单提交：查看控制器传递不放表单属性

1 个答案: