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Wednesday, 10 July 2013

Spring 3 Form handling example

07:26

Softwares Used

1. Eclipse Juno

2. Tomcat 7

3. Spring 3.0.3

Example

Create one Web application and follow below steps

1. Create a class to define form attributes

package com.pretech.form; 
public class SimpleForm {
private String name;
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getAddress() {
    return address;
}
public void setAddress(String address) {
    this.address = address;
}
private String address;
} 

2.Create a Controller class

package com.pretech; 
import java.util.Map; 
import javax.validation.Valid; 
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod; 
import com.pretech.form.SimpleForm; 
@Controller
@RequestMapping("simpleform.html")
public class SimpleFormController {
    @RequestMapping(method = RequestMethod.GET)
    public String showForm(Map<String, SimpleForm> model) {
        SimpleForm simpleForm = new SimpleForm();
        model.put("simpleForm", simpleForm);
        return "simpleform";
    } 
    @RequestMapping(method = RequestMethod.POST)
    public String processForm(@Valid SimpleForm simpleForm, BindingResult result,
            Map model) {
        if (result.hasErrors()) {
            return "simpleform";
        }
        simpleForm = (SimpleForm) model.get("simpleForm");
        model.put("simpleForm", simpleForm);
        return "simpleform";
    } 
} 

2.Create a JSP Page

<%@ 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>Spring mvc simple form example</title>
</head>
<body>
<h3>Simple Form</h3>
<h3>Welcome ${simpleForm.name} </h3>
<form:form action="simpleform.html"  commandName="simpleForm">
    <table>
        <tr>
            <td>Enter your Name:</td>
        </tr>
        <tr>
            <td><form:input path="name" /> <FONT color="red"><form:errors    path="name" /></FONT></td>
        </tr>
        <tr>
            <td>Enter your address:<FONT color="red"><form:errors    path="address" /></FONT></td>
        </tr>
        <tr>
            <td><form:input path="address" /></td>
        </tr>
        <tr>
            <td><input type="submit" value="Submit" /></td>
        </tr>
    </table>
</form:form>
</body>
</html>

4. Create spring config file (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"
    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
    "> 
    <mvc:annotation-driven />
    <context:component-scan base-package="com.pretech" />
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean> 
    <bean id="messageSource"
        class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="/WEB-INF/messages" />
    </bean>
    <!-- Configure the multipart resolver -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">      
    </bean> 
</beans> 

5. Add Spring Dispatcher servlet details in to web.xml

<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>/</url-pattern>
    </servlet-mapping>
    <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
     <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
    </context-param>

5. Run the application on Tomcat Server


http://localhost:8080/Spring3SimpleFormExample/simpleform.html 




image


Enter your name , addres and click on submit button


image




Download this example Spring Form Handling

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