Spring 3.2 MVC Form Handling

In this example, you will learn about handling forms in Spring 3.2 MVC.

Spring 3.2 MVC Form Handling

Spring 3.2 MVC Form Handling

In this example, you will learn about handling forms in Spring 3.2 MVC.

In the given below example, a login page is given in which you need to enter following correct information :

  • User Name (Admin)
  • Password (root)

The project structure is given below :

Given below the application flow followed by the code used in the application :

When you execute the application, the first page which will appear to you is :

If fill incorrect information, it will redirect you on a error page :

If login is correct, it will show you the following code :

Codes :

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>Spring3.2Form Handling</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>

</web-app>

dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">

<context:component-scan base-package="net.roseindia.controller" />

<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>

<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="/WEB-INF/messages" />
</bean>

</beans>

index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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>Insert title here</title>
</head>
<body>
<jsp:forward page="loginForm.html"></jsp:forward>
</body>
</html>

FormController.java

package net.roseindia.controller;

import java.util.Map;

import net.roseindia.model.LoginForm;

import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class FormController {
@RequestMapping("/loginForm.html")
public String showForm(Map<String, LoginForm> model) {
LoginForm loginForm = new LoginForm();
model.put("loginForm", loginForm);
return "loginform";
}

@RequestMapping("/login.html")
public String processForm(LoginForm loginForm, BindingResult result,
Map<String, LoginForm> model) {
String userName = "Admin";
String password = "root";
if (result.hasErrors()) {
return "loginform";
}
loginForm = (LoginForm) model.get("loginForm");

if (!loginForm.getUserName().equals(userName)
|| !loginForm.getPassword().equals(password)) {
return "loginerror";
}

model.put("loginForm", loginForm);
return "loginsuccess";
}

}

LoginForm.java

package net.roseindia.model;

import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;

public class LoginForm {
@NotEmpty
@Size(min = 1, max = 50)
private String userName;

@NotEmpty
@Size(min = 1, max = 20)
private String password;

public void setUserName(String userName) {
this.userName = userName;
}

public String getUserName() {
return userName;
}

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

public String getPassword() {
return password;
}

}

loginform.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/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>Spring3Example</title>
</head>
<body>
<h3>Login Form</h3>
<font color="blue">
<h5>User Name="Admin" and Password="root"</h5>
</font>
<form:form action="login.html" commandName="loginForm">
<table>
<tr>
<td>User Name:<FONT color="red"><form:errors
path="userName" /></FONT></td>
</tr>

<tr>
<td><form:input path="userName" /></td>
</tr>

<tr>
<td>Password:<FONT color="red"><form:errors
path="password" /></FONT></td>
</tr>

<tr>
<td><form:password path="password" /></td>
</tr>

<tr>
<td><input type="submit" value="Submit" /></td>
</tr>

</table>
</form:form>
</body>
</html>

loginsuccess.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core"%>

<!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>Spring 3.2 Form Handling Example</title>
</head>
<body>
<h3>Welcome <core:out value="${loginForm.userName}" /></h3>
<table>
<tr>
<td><a href="loginForm.html">Back</a></td>
</tr>
</table>
</body>

</html>

loginerror.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>

<!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>Spring3Example</title>

</head>

<body>

<h3>Login Error !!! Click below to login again</h3>

<table>

<tr>

<td><a href="loginForm.html">Retry</a></td>

</tr>

</table>

</body>

</html>

Download Source Code

Tutorials

  1. Spring 3.2
  2. New Features of Spring Framework 3.2
  3. Spring MVC framework Introduction
  4. Special Bean Types of WebApplicationContext
  5. Spring MVC framework Features
  6. Processing Sequence of DispatcherServlet
  7. @Controller annotation for defining new controller
  8. @RequestMapping annotation for mapping requests
  9. Spring 3.2 Asynchronous Request Processing
  10. Defining handler methods using @RequestMapping annotation
  11. Requests Intercepting through a HandlerInterceptor
  12. View Resolving through ViewResolver interface
  13. Chaining of Multiple view resolvers
  14. Redirecting and forwarding to views
  15. ContentNegotiatingViewResolver
  16. Locales in Spring MVC
  17. Themes and Theme resolvers in Spring MVC
  18. Multipart support for file upload in Spring MVC
  19. @ExceptionHandler & @ResponseStatus annotation
  20. Customizing the Default Error Page
  21. Form Tag library configuration
  22. The form tag
  23. The input tag
  24. The password tag
  25. ControllerClassNameHandlerMapping class for handling convention mapping
  26. Modification in conventional ModelAndView
  27. Autogenerated logical view name through RequestToViewNameTranslator
  28. The checkbox tag
  29. Support for ETag
  30. Servlet container initialization through code
  31. MVC Java Config or the MVC XML Namespace
  32. Customizing the MVC Java config or XML Namespace
  33. Interceptors Configuration using Java or XML
  34. Content Negotiation Configuration
  35. Spring 3.2 MVC Hello World Example
  36. View resolvers
  37. View Controllers Configuration
  38. Static Resources Configuration
  39. mvc:default-servlet-handler
  40. The checkboxes tag