Spring MVC Display Date variable

Question

I am trying to run a project in Spring MVC. Here is the code

index.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>



    
        
        Welcome to Spring Web MVC project
    

    
        Spring 3 Register!
        click
        
            
                
                    Spring MVC Form Demo - Registration
                
                
                    User Name
                    
                
                
                    Password
                    
                
                
                    Email
                    
                
                
                    BirthDate (mm/dd/yyyy)
                    
                
                
                    Profession

RegistrationController.java

package RegisterInfo;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 *
 * @author Harshit Shrivastava
 */
import RegisterInfo.model.User;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.ui.Model;

@Controller
@RequestMapping(value = "/register")
public class RegistrationController {

    @RequestMapping(method = RequestMethod.GET)
    public String viewRegistration(Model model)
    {
        User userForm = new User();
                model.addAttribute("userForm", new User());

                List professionList = new ArrayList();
                professionList.add("Developer");
                professionList.add("Designer");
                professionList.add("IT Manager");
                model.put("professionList", professionList);
        return "index";
    }
    @InitBinder
    public void initBinder(WebDataBinder binder) {
         SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");
         sdf.setLenient(true);
         binder.registerCustomEditor(Date.class, new CustomDateEditor(sdf, true));
    }
    @RequestMapping(method = RequestMethod.POST)
    public ModelAndView processRegistration(@ModelAttribute("userForm") User user, Map model)
    {       
        model.addAttribute("username", user.getUserName());
        model.addAttribute("password", user.getPassword());
        model.addAttribute("birthDate", user.getBirthDate());
        model.addAttribute("email", user.getEmail());
        model.addAttribute("profession", user.getProfession());                 
            return new ModelAndView("RegisterSuccess","userForm",new User());
    }
}

User.java

package RegisterInfo.model;

import java.util.Date;

public class User {
    private String username;
    private String password;
    private String email;
    private Date birthDate;
    private String profession;

    public String getUserName()
    {
        return username;
    }
    public void setUserName(String username)
    {
        this.username = username;
    }
        public String getPassword()
    {
        return password;
    }
    public void setPassword(String password)
    {
        this.password = password;
    }
        public String getEmail()
    {
        return email;
    }
    public void setEmail(String email)
    {
        this.email = email;
    }
        public Date getBirthDate()
    {
        return birthDate;
    }
    public void setBirthDate(Date birthDate)
    {
        this.birthDate = birthDate;
    }
        public String getProfession()
    {
        return profession;
    }
    public void setProfession(String profession)
    {
        this.profession = profession;
    }
}

RegisterSuccess.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>



    
        
        Welcome to Spring Web MVC project
    

    
        Register Success!
            
                
                    User Name
                    ${username}
                
                
                    Password
                    ${password}
                
                
                    Email
                    ${email}
                
                
                    BirthDate (mm/dd/yyyy)
                    ${birthDate}
                
                
                    Profession
                    ${profession}

In the above program, I am able to print all the fields but not date i.e. BirthDate. Why it is not getting printed?

Rozart · Accepted Answer

You forgot to add the model, that you filled with attributes, to newly created ModelAndView that you return in processRegistration method. You got NullPointerException when rendering your view, because there were no attributes to display in the Model.

Here's the fixed method:

@RequestMapping(method = RequestMethod.POST)
public ModelAndView processRegistration(@ModelAttribute("userForm") User user, Map model)
{       
    model.addAttribute("username", user.getUserName());
    model.addAttribute("password", user.getPassword());
    model.addAttribute("birthDate", user.getBirthDate());
    model.addAttribute("email", user.getEmail());
    model.addAttribute("profession", user.getProfession());
    model.addAttribute("userForm", new User());                 
    return new ModelAndView("RegisterSuccess",model);
}

Additionally if NullPointerException still occurs you can do such thing in your RegisterSuccess.jsp :

<%@page contentType="text/html" pageEncoding="UTF-8" %>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>




    
    Welcome to Spring Web MVC project



Register Success!

    
        User Name
         ${username}
    
    
        Password
        ${password}
    
    
        Email
        ${email}
    
    
        BirthDate (mm/dd/yyyy)
        ${birthDate}
    
    
        Profession
        ${profession}

If you see that one of the parameters is not displayed, then it means that it has null value.

Spring MVC Display Date variable

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