Problem with validation example

[Gourav Bansal]

hi

i am trying to create an validation example but not able to do. please help

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/mvc
		http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

	<context:component-scan base-package="com.bansal.controller" />
	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="WEB-INF/view/" />
		<property name="suffix" value=".jsp" />
	</bean>

	<bean id="passedModel" class="com.bansal.model.UserInformation"></bean>
	<mvc:annotation-driven />

</beans>

package com.bansal.controller;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.bansal.model.MyModel;
import com.bansal.model.UserInformation;

@Controller
public class MyController {

	String formName;
	MyModel modelObject;

	@Autowired
	MyController(MyModel passedModel) {
		modelObject = passedModel;
	}

	@RequestMapping(value = "/RegistartionPage")
	public ModelAndView showRegistarionForm()  {
		return new ModelAndView("NewRegistrationPageView",
				"NewRegistarionPageModel", this.modelObject);
	}

	@RequestMapping(value = "/showInformation")
	public ModelAndView showInformation(
			@ModelAttribute("NewRegistarionPageMode") @Valid UserInformation userInfo,
			BindingResult result) {
		if (result.hasErrors()) {
			System.out.println("*****************************************");
			return new ModelAndView("NewRegistrationPageView",
					"NewRegistarionPageModel", this.modelObject);
		}
		return new ModelAndView("UserInfomationPageView",
				"UserInfomationPageModel", userInfo);

	}

}

package com.bansal.model;

import javax.validation.constraints.NotNull;

public class UserInformation implements MyModel {

	String formName;

	@NotNull
	String fName;

	@NotNull
	String lName;
	String emailAddress;
	String password;
	String confPass;
	String gender;
	
	
	public String getfName() {
		return fName;
	}
	
	public void setfName(String fName) {
		this.fName = fName;
	}

	public String getlName() {
		return lName;
	}

	public void setlName(String lName) {
		this.lName = lName;
	}

	public String getEmailAddress() {
		return emailAddress;
	}

	public void setEmailAddress(String emailAddress) {
		this.emailAddress = emailAddress;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getConfPass() {
		return confPass;
	}

	public void setConfPass(String confPass) {
		this.confPass = confPass;
	}

	public String getGender() {
		return gender;
	}

	public void setGender(String gender) {
		this.gender = gender;
	}

	public String getFormName() {
		return formName;
	}

	public void setFormName(String name) {
		this.formName = name;
	}

}

please help

[Gourav Bansal]

I tried to resolve it and done some modification in the code and i succeed in doing validation part but not able to show the error.

Here is the changed code

package com.bansal.controller;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.bansal.model.MyModel;
import com.bansal.model.UserInformation;

@Controller
public class MyController {

	String formName;
	MyModel modelObject;

	@Autowired
	MyController(MyModel passedModel) {
		modelObject = passedModel;
	}

	@RequestMapping(value = "/RegistartionPage")
	public String showRegistarionForm(ModelMap model) {
		model.addAttribute("NewRegistrationPageModel", new UserInformation());
		return "NewRegistrationPageView";
	}

	@RequestMapping(value = "/showInformation", method = RequestMethod.POST)
	public String showInformation(@Valid UserInformation userInfo,
			BindingResult result,ModelMap model) {
		if (result.hasErrors()) {

			return "NewRegistrationPageView";
		}
		model.addAttribute( "UserInfomationPageModel",userInfo);
		return "UserInfomationPageView";

	}

}

here when i hit the first request the new registration page open and if i fill the information it will take me to the other page (showInformation).
But in case of any error(field are blank) then the result.hasError return true and the method return NewRegistrationPageView.

On the JSP page i got

org.apache.jasper.JasperException: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'NewRegistrationPageModel' available as request attribute
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:548)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1157)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:927)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)


root cause 

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'NewRegistrationPageModel' available as request attribute
	org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)
	org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:178)
	org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:198)
	org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:129)
	org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:119)
	org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:89)
	org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102)
	org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79)
	org.apache.jsp.WEB_002dINF.view.NewRegistrationPageView_jsp._jspx_meth_form_005flabel_005f0(NewRegistrationPageView_jsp.java:372)
	org.apache.jsp.WEB_002dINF.view.NewRegistrationPageView_jsp._jspService(NewRegistrationPageView_jsp.java:115)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1157)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:927)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet

here is my JSP code where this error come

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>${NewRegistarionPageModel.formName}</title>
</head>
<body>
	<center>${NewRegistarionPageModel.formName}</center>
	<form:form method="post" action="showInformation"
		commandName="NewRegistrationPageModel">
		<table>
 			<tr>
 				<td><form:label path="fName">First Name:</form:label></td>
 				<td><form:input path="fName" /></td>
 				<td><form:errors path="fName" cssClass="error"/> 
 			</tr>
 			<tr>
 				<td><form:label path="lName">Last Name:</form:label></td>
 				<td><form:input path="lName" /></td>
 				<td><form:errors path="lName" cssClass="error"/> 
 			</tr>
 			<tr>
 				<td><form:label path="emailAddress">Email Address:</form:label>
 				</td>
 				<td><form:input path="emailAddress" /></td>
 				<td><form:errors path="emailAddress" cssClass="error"/> 
 			</tr>
 			<tr>
 				<td><form:label path="password">Password:</form:label></td>
 				<td><form:password path="password" /></td>
 				<td><form:errors path="password" cssClass="error"/> 
 			</tr>
 			<tr>
 				<td><form:label path="confPass"> Confirm Password</form:label>
 				</td>
 				<td><form:password path="confPass" /></td>
 				<td><form:errors path="confPass" cssClass="error"/> 
 			</tr>
 			<tr>
 				<td><form:label path="gender">Gender</form:label></td>
 				<td><form:radiobutton path="gender" value="male" label="Male" />
 					<form:radiobutton path="gender" value="female" label="Female" /></td>
 			<td><form:errors path="gender" cssClass="error"/> 
 			</tr>
 			<tr>
 				<td ><input type="submit"  id="submit" value="submit" /></td>
 			</tr>
 
 		</table>
	</form:form>
</body>
</html>

I am using here command class in the form tag. I believe when i request this page first time i put the command class in the modelMap field but second request won't pass the existing modelmap attribute.

please help