Java: Using Spring Framework in Web application

Below process depicts integration of Spring Framework with the Web Project. When user access the URL the system will display message which is configured in Spring configuration file (applicationContext.xml).

Prerequisites:

1. Download spring framework libraries as shown below (spring.jar and other dependencies)

2. Application Server to deploy the application

(Refer -> How to install and run JBoss ?)

Project Structure (Eclipse J2EE Project template):

Testing:

- JBoss is running on 8080 port where application is deployed

http://localhost:8080/DemoHibernateSpring/hello.jsp

Output:

Resource Reference:

(1) MessageService.java (Interface)

package control;

public interface MessageService {

public String getMessage();

}

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(2) MessageServiceImpl.java (Implementation)

package control;

public class MessageServiceImpl implements MessageService {

private String message;

public String getMessage() {

return this.message;

}

public void setMessage(String message) {

this.message = message;

}

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(3) applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<bean id="msgService"

class="control.MessageServiceImpl">

<value>Hi from Spring Framework !</value>

</property>

</bean>

</beans>

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(4) web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"

version="2.4">

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/applicationContext.xml</param-value>

</context-param>

<listener-class>

org.springframework.web.context.ContextLoaderListener

</listener-class>

</listener>

</web-app>

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(5) hello.jsp

<%@ page import="org.springframework.context.*,org.springframework.web.context.*, control.*"%>

<html>

<head>

<title>Insert title here</title>

</head>

<body>

ApplicationContext factory =

(ApplicationContext) this.getServletContext().getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);

MessageService service = (MessageService)factory.getBean("msgService");

Message : <%=service.getMessage() %>

</body>

</html>

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Java

Using Spring Framework in Web application

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