Spring MVC Hello World Step by Step...
Requirements:
- Spring 3.0
- Eclipse JAVA EE IDE
- JDK 1.6
- ApacheTomcat - 6.0.26
Step 1: Create a dynamic web project in eclipse and named as "SpringMVC".
File à New à Dynamic Web Project
Step 2: Create the controller class "MyHelloWorldController" under the package com.prem.spring.controller.
NOTE : @Controller - We specified the MyHelloWorldController class as a controller.
@RequestMapping - Map the request value to the specific method in the controller. In this example the value is hello and the controller method we mapped for that is printHello.
method = RequestMethod.GET is not mandatory.
Step 3 : Add all the Spring and other relevant jars to WebContent\WEB-INF\lib
File à New à Dynamic Web Project
Step 2: Create the controller class "MyHelloWorldController" under the package com.prem.spring.controller.
package com.prem.spring.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class MyHelloWorldController {
@RequestMapping(value = "/hello", method = RequestMethod.GET)
public String printHello(ModelMap model) {
model.addAttribute("message", "Hello World Spring 3.0 MVC!");
return "hello";
}
}
NOTE : @Controller - We specified the MyHelloWorldController class as a controller.
@RequestMapping - Map the request value to the specific method in the controller. In this example the value is hello and the controller method we mapped for that is printHello.
method = RequestMethod.GET is not mandatory.
Step 3 : Add all the Spring and other relevant jars to WebContent\WEB-INF\lib
The following jars I added for this example.
- commons-logging-1.1.jar
- org.springframework.asm-3.0.1.jar
- org.springframework.beans-3.0.1.jar
- org.springframework.context-3.0.1.jar
- org.springframework.core-3.0.1.jar
- org.springframework.expression-3.0.1.jar
- org.springframework.web.servlet-3.0.1.jar
- org.springframework.web-3.0.1.jar
- jstl.jar
Step 4 : Configure the spring in "web.xml" and "spring-servlet.xml".
The "web.xml" file as below.
<?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>SpringMVC</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
</web-app>
The "spring-servlet.xml" file as below.
<?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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.prem.spring.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>
</beans>
Step 5 : Create a view page "index.jsp" and "hello.jsp" page.
The "index.jsp" page for this example as below.
<%@ 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>Spring 3.0 Hello World - Home Page</title>
</head>
<body>
<a href="hello.html">Show Message</a>
</body>
</html>
The "hello.jsp" page as below. In this page I used the jstl for the view the message which receive from the "MyHelloWorldController" controller.
<%@ 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>Welcome message </title> </head> <body> Welcome message : ${message} </body> </html>
Now the time comes to see the result..
Step 6 : Run the project on the server what we configured. In our case we used "ApacheTomcat - 6.0.26".
The index page shows as below.
Once you click on the show message link you will receive the page as below.
That's all folks...
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