Spring MVC传递模型以查看然后传递给控制器

Question

I'm stuck with my code, I'm trying to pass the info of the object "Student". My scenario is like this:

1. Registration Form (fill the details then press submit button go to next page)

2. From this view the model will be printed out then press the next button again.

3. This third page will just show the information again.

Q: How can i pass the same object and display it to other views?

My code is like this.

Registration view:

<form action="/HamburgerProject/stuSubmitAdmissionForm.html" method="post">
    <table>
    <tr>
        <td>Name:</td>          <td><input type="text" name="studentName"></td></tr>
    <tr>
        <td>Age:</td>           <td><input type="text" name="studentAge"></td></tr>
    <tr>
    </table>
    <input type="submit" value="submit this">
</form>

First Information View:

<form action="/HamburgerProject/stuSubmitAdmissionForm.html" method="post">
<table>
    <tr>
        <td>Student's Name :</td>
        <td>${student.studentName}</td>
    </tr>
    <tr>
        <td>Student's Age :</td>
        <td>${student.studentAge}</td>
    </tr>
</table>
    <input type="submit" value="send"/>
</form>

Second Information View:

<table>
    <tr>
        <td>Student's Name :</td>
        <td>${student.studentName}</td>
    </tr>
    <tr>
        <td>Student's Age :</td>
        <td>${student.studentAge}</td>
    </tr>
</table>

My Controller:

@RequestMapping(value="/stuAdmissionForm.html", method = RequestMethod.GET)
public ModelAndView getStudentAdmissionForm() {
    ModelAndView model = new ModelAndView("AdmissionForm");
    return model;

}

@RequestMapping(value="/stuSubmitAdmissionForm.html", method = RequestMethod.POST) 
public ModelAndView submitModelAttributeAnnotationAdmissionForm(@ModelAttribute("student") Student student) {

    ModelAndView model = new ModelAndView("AdmissionSuccess");
    return model;
}

@RequestMapping(value="/stuDisplayForm.html", method = RequestMethod.POST) 
public ModelAndView getStudent(Student student) {

    ModelAndView model = new ModelAndView("NewForm");
    model.addObject(student);

    return  model;
}

In attempting to re-display the information from second view to third view the object Student is not being passed.

Answer 1

There are no fields to submit in your fist information view. You have to add the values to hidden fileds:

<form action="/HamburgerProject/stuSubmitAdmissionForm.html" method="post">
<table>
    <tr>
        <td>Student's Name :</td>
        <td>${student.studentName}</td>
    </tr>
    <tr>
        <td>Student's Age :</td>
        <td>${student.studentAge}</td>
    </tr>
</table>
    <input type="hidden" name="studentName" value="${student.studentName}">
    <input type="hidden" name="studentAge" value="${student.studentAge}">
    <input type="submit" value="send"/>
</form>