java - Spring MVC Multiple ModelAttribute On the Same Form

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java - Spring MVC Multiple ModelAttribute On the Same Form

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

java - Spring MVC Multiple ModelAttribute On the Same Form

I have a form with two ModelAttributes one is citizens and the other is punishment. The two objects are separated by jquery tabs. I am having problems in getting the items on the form to display properly some are being displayed and some are not. I mean the html elements.

I am not sure how the Controller would look when there is multiple ModleAttributes on the page. Under is a sample of the code:

Page

<title>Citizen Registration</title>

    </head>

    <body>  
        <div id="tabs"> 

        <ul>
            <li><a href="#tab1">Citizen Registration</a></li>
            <li><a href="#tab2">Punishment</a></li>
        </ul>


        <div id="tab1">
            <form:form id="citizenRegistration" name ="citizenRegistration" method="post" modelAttribute="citizens" action="citizen_registration.htm">
                <div id="divRight" class="mainDiv">             
                    <div class="divGroup" id="divCharInfo"> 
                    <fieldset>  
                    <legend>Characteristics Info</legend>
                            <ol>    
                                <li><form:label for="photo" path="photo">Select Photo</form:label>
                                    <form:input path="photo" type="file" id="photo" title="Upload a photo"/><form:errors path="photo" id="errors"/></li>

                                <li>
                                    <label>Select Gender</label>
                                    <form:select path="genderId" id="genderId" title="Select Your Gender">
                                    <form:options items = "${gender.genderList}" itemValue="genderId" itemLabel="genderDesc" />
                                    </form:select>
                                    <form:errors path="genderId" class="errors"/>
                                </li>               

                                <li><form:label for="weight" path="weight">Enter Weight <i>(lbs)</i></form:label>
                                    <form:input path="weight" id="weight" title="Enter Weight"/><form:errors path="weight" id="errors"/>
                                </li> 

                                <li><form:label for="height" path="height">Enter Height <i>(feet)</i></form:label>
                                    <form:input path="height" id="height" title="Enter Height"/><form:errors path="height" id="errors"/>
                                </li> 
                                                .......................


            <div id="tab2">
                <form:form id="punishmentRegistration" name ="punishmentRegistration" method="post" modelAttribute="punishment" action="punishment_registration.htm">

                <ol>
                    <li>
                        <form:label for ="punishmentId" path="punishmentId">Punishment Number</form:label>
                        <form:input path="punishmentId" id="punishmentId"/><form:errors path="punishmentId" id="errors"/>                   
                    </li>

                    <li>
                        <form:label for="crimeRecNo" path="crimeRecNo">Select Crime</form:label>
                        <form:select path="crimeRecNo" id="CrimeRecNo" title="Select Crime">
                        <form:options items = "${crime.crimeList}" itemValue="crimeRecNo" itemLabel="crimeRecNo" title="crimeDesc"/>
                        </form:select>
                        <form:errors path="crimeRecNo" id="errors"/>
                    </li>   

                    <li>
                        <form:label for ="monitoringStDate" path="monitoringStDate"> Start Date </form:label>
                        <form:input path="monitoringStDate" id="monitoringStDate"/><form:errors path="monitoringStDate" id="errors"/>                   
                    </li>


                    <li>
                        <form:label for ="monitoringEnDate" path="monitoringEnDate"> End Date </form:label>
                        <form:input path="monitoringEnDate" id="monitoringEnDate"/><form:errors path="monitoringEnDate" id="errors"/>                   
                    </li>                   
                </ol>               

                </form:form>            
            </div>                      

        </div>

    </body>
</html>

Controller

@RequestMapping(value="citizen_registration.htm", method = RequestMethod.GET)
    public ModelAndView loadPage(HttpServletRequest request,
                                 HttpServletResponse response,
                                 @ModelAttribute Citizens citizens, @ModelAttribute Punishment punishment,
                                 BindingResult result,
                                 ModelMap m, Model model) throws Exception {

//code here

return new ModelAndView("citizen_registration");

This is my code however when i run it nothing in tab2 is displayed andnot all elements in tab1 is shown.

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1 Reply

深蓝 · Answer 1 · 2021-10-16T23:52:20+0000

I don't think so if you can bind multiple models using the Spring form. In fact you should take a look in the spring binding form. http://static.springsource.org/spring/docs/1.1.5/taglib/tag/BindTag.html Take a look in the sample code. I have not tested the code. Let know in case of any issues.

Model

public class User{

private String username;
private String password;

..Setter and Getters
}

public class UserProfile{
private String firstName;
private String lastName;

setter and getter
}

Controller

@Controller
public class MyController{
    @RequestMapping(....)
    public String newAccountForm(ModelMap map){
        User user = new User(); //Would recommend using spring container to create objects
        UserProfile profile = new UserProfile();

        map.addAttribute('user', user);
        map.addAttribute('profile', profile);

        return "form"
    }




     @RequestMapping(....)
        public String newAccountForm(@ModelAttrbite('User')User user, BindingResult resultUser, @ModelAttribute('UserProfile')UserProfile userProfile, BindingResult resultProfile){

//Check the binding result for each model. If not valid return the form page again
//Further processing as required.

        }
    }

JSP

<%@taglib  uri="http://www.springframework.org/tags" prefix="spring">

<form action="" method="post">

<spring:bind path="user.username">
   <input type="text" name="${status.expression}" value="${status.value}"><br />
        </spring:bind>

<spring:bind path="user.password">
   <input type="password" name="${status.expression}" value="${status.value}"><br />
        </spring:bind>

<spring:bind path="profile.firstName">
   <input type="text" name="${status.expression}" value="${status.value}"><br />
        </spring:bind>
<spring:bind path="profile.lastName">
   <input type="text" name="${status.expression}" value="${status.value}"><br />
        </spring:bind>

<input type="submit" value="Create"/>
</form>

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java - Spring MVC Multiple ModelAttribute On the Same Form

java - Spring MVC Multiple ModelAttribute On the Same Form

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