Simple Form Controlle Example
SimpleFormController Example in Spring 2.5 Web MVC Framework
Spring provides SimpleFromController for control a form data in the web
application. If you want to handle form in spring then you need to use
SimpleFormController by extending these in your Controller class. It's provides
formView, successView in the case of valid submission and provide validation
errors if wrong data entry by the user in the form data. This is also handle
model object for binding and fetching data. In this example we will discuss
about SimpleFormController work flow. In this example we will create a form that
accept user data and display.
Step 1:
Now we will create a index.jsp inside the WebContent folder that will have a hyperlink
"Fill User Personal Details "for generate user
request to enter user detail. The code of the index.jsp is:
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<%@page
contentType="text/html"
pageEncoding="UTF-8"%>
<html>
<head>
<title>User
Welcome Page</title>
</head>
<body
bgcolor="#EEEEEE">
<center>
<a
href="user.html">Fill
User Personal Details</a>
</center>
</body>
</html>
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Step 2:
Now we will configured web.xml for DispatcherServlet and spring.tld. The code of the
web.xml file is:
Step 3:
Now we will create a dispatcher-servlet.xml file inside the project /WEB-INF/
folder. The dispatcher-servlet.xml file will have configuration code for the
particular request and configure a controller that request with set some
properties like formView, succesView, commandClass, CommandName, validator etc.
The code of the dispatcher-servlet.xml is:
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<?xml
version="1.0"
encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"
xmlns:p="http://www.springframework.org/schema/p">
<bean
id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property
name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property
name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean
id="urlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property
name="interceptors">
<list>
<ref
local="localeChangeInterceptor"/>
</list>
</property>
<property
name="urlMap">
<map>
<entry
key="/user.html">
<ref
bean="userController"/>
</entry>
</map>
</property>
</bean>
<bean
id="userValidator"
class="net.roseindia.web.UserValidator"/>
<bean
id="userController"
class="net.roseindia.web.UserFormController">
<property
name="sessionForm"><value>false</value></property>
<property
name="commandName"><value>user</value></property>
<property
name="commandClass"><value>net.roseindia.web.User</value></property>
<property
name="validator"><ref
bean="userValidator"/></property>
<property
name="formView"><value>user</value></property>
<property
name="successView"><value>usersuccess</value></property>
</bean>
<bean
id="localeChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property
name="paramName"
value="hl"/>
</bean>
<bean
id="localeResolver"
class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/>
</beans>
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In this dispatcher-servlet.xml we have also declared beans for
urlMapping and viewResolver.
Step 4:
Now we will create two jsp files user.jsp and usersuccess.jsp
inside the /WEB-INF/jsp/ folder. The user.jsp contain a form and form fields for
user interface. The code of the user.jsp is:
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<%@
taglib
prefix="core"
uri="http://java.sun.com/jsp/jstl/core"
%>
<%@
taglib
prefix="fmt"
uri="http://java.sun.com/jsp/jstl/fmt"
%>
<%@
taglib
prefix="spring"
uri="/spring"%>
<%@
taglib
prefix="form"
uri="http://www.springframework.org/tags/form"
%>
<html>
<head><title>User
Personal Details</title></head>
<body>
<center>
<h3>User
Personal Details</h3>
<br/>
<form:form
commandName="user"
method="POST"
name="user">
<table
border="0">
<tr>
<td>Name:</td>
<td><form:input
path="name"/></td>
<td><font
color="red"><form:errors
path="name"/></font></td>
</tr>
<tr>
<td>Email
ID:</td>
<td><form:input
path="emailid"/></td>
<td><font
color="red"><form:errors
path="emailid"/></font></td>
</tr>
<tr>
<td>Date
of birth:</td>
<td><form:input
path="dob"/></td>
<td><font
color="red"><form:errors
path="dob"/></font></td>
</tr>
<tr>
<td>Qualification:</td>
<td><form:input
path="qualification"/></td>
<td><font
color="red"><form:errors
path="qualification"/></font></td></tr>
<tr>
<td>Contact
Number:</td>
<td><form:input
path="contact"/></td>
<td><font
color="red"><form:errors
path="contact"/></font></td>
</tr>
<tr>
<td>Address:</td>
<td><form:input
path="address"/></td>
<td><font
color="red"><form:errors
path="address"/></font></td>
</tr>
<tr>
<td
colspan="3"
align="center"><input
type="submit"
value="Save"/></td>
</tr>
</table>
</form:form>
</center>
</body>
</html>
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The usersuccess.jsp file display data entered by the user in the
user.jsp form. The code of the usersuccess.jsp is:
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<%@
page
session="false"%>
<%@
taglib
prefix="core"
uri="http://java.sun.com/jsp/jstl/core"
%>
<%@
taglib
prefix="fmt"
uri="http://java.sun.com/jsp/jstl/fmt"
%>
<%@
taglib
prefix="spring"
uri="/spring"
%>
<html>
<head>
<title>User
Personal Details Display</title>
</head>
<body>
<center>
<h3>User
Personal Details Display</h3><br>
<table>
<tr>
<td
colspan="2"
align="center"><font
size="5">User
Information</font></td>
</tr>
<tr>
<td>Name:</td>
<td><core:out
value="${user.name}"/></td>
</tr>
<tr>
<td>Email
ID:</td>
<td><core:out
value="${user.emailid}"/></td>
</tr>
<tr>
<td>Date
Of Birth:</td>
<td><core:out
value="${user.dob}"/></td>
</tr>
<tr>
<td>Qualification:</td>
<td><core:out
value="${user.qualification}"/></td>
</tr>
<tr>
<td>Contact
Number:</td>
<td><core:out
value="${user.contact}"/></td>
</tr>
<tr>
<td>Address:</td>
<td><core:out
value="${user.address}"/></td>
</tr>
</table>
<a
href="user.html">Back</a>
</center>
</body>
</html>
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Step 5:
Now we will create User.java class inside the project src folder that will have some variables
and setter and getter for these variables. we have used this class instance as a
commandName and use this class as a command class for request controller. The
code of the User.java class is:
package net.roseindia.web;
public class User {
public User(){}
private String name;
private String emailid;
private String dob;
private String address;
private String qualification;
private String contact;
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getQualification() {
return qualification;
}
public void setQualification(String qualification) {
this.qualification = qualification;
}
public String getContact() {
return contact;
}
public void setContact(String contact) {
this.contact = contact;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmailid() {
return emailid;
}
public void setEmailid(String emailid) {
this.emailid = emailid;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
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Step 6:
Now we will create UserFormController.java class that extends
SimpleFormController inside the project src folder for control the request. It
will have override onSubmit() method that accept class object as a parameter and
after proceed these object return ModelAndView for the user display. The code of
the UserFormController.java class is:
package net.roseindia.web;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.RedirectView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import net.roseindia.web.User;
@SuppressWarnings("deprecation")
public class UserFormController extends SimpleFormController {
@Override
protected ModelAndView onSubmit(Object command)
throws ServletException {
User user = (User) command;
ModelAndView modelAndView = new ModelAndView(getSuccessView());
modelAndView.addObject("user", user);
return modelAndView;
}
}
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