Java 'n More: First Spring Application from scratch

Step – 0

Download and Install java 7 from http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html . Accept License Agreement. Install from zip file.

Step – 1

Download eclipse https://spring.io/tools/eclipse

Step – 2

To install eclipse, unzip eclipse-jee-luna-SR2-win32-x86_64.zip in d:\eclipse.

Step – 3

To start eclipse double click eclipse.exe

Step – 4

Download Spring jar files from http://repo.spring.io/release/org/springframework/spring/4.1.6.RELEASE/

Download spring-framework-4.1.6RELEASE-dist.zip file. Unzip this file in d:\spring folder.

Step – 5

Download Apache Commons Logging commons-logging-1.2-bin.zip. Unzip commons-logging-1.2-bin.zip to d:\ commons-logging-1.2 folder.

Step – 6

Download Apache Tomcat Web Application Server from http://tomcat.apache.org/download-70.cgi .

You will get apache-tomcat-7.0.61-windows-x64.zip file. Unzip apache-tomcat-7.0.61-windows-x64.zip to d:\ apache-tomcat-7.0.61.

Step – 7

Start eclipse by double clicking eclipse.exe. You can give a new name for the workspace you want to use for your Spring applications.

Step – 8

Create a new Java project in eclipse Luna IDE.

Select web Dynamic project.

Click Next and give the project name as MyFirstSpringWebApp.

Click next and next. At this point select Generate web.xml deployment descriptor.

And click Finish.

Step – 8

Prepare your project to be spring web application. You need to add spring libraries to your web project.

Select lib folder in WEB-INF folder in webContent in your Web Application project.

Open d:\spring ( this is the folder where you have unzipped spring jars). Go to the lib folder, you will see all the jars. Select all the jars and copy (ctrl+A and CTRL+C), and then go to eclipse project and paste all these jars in lib folder.

It will look like this.

You need to add Common logging lib too. To do this go to D:\commons-logging-1.2 and copy commons-logging-1.2.jar. and paste this jar to WEB-INF\lib in your project.

Step – 9 You need to add Application Server to your application. In eclipse IDE, select window ->showview ->others. SelectServer-> servers.

In eclipse IDE you will see server window with the following message…

Click on this link to add Server. Select Apache Tomcat 7.

Click on Add link. Give the path where you have unzipped the Tomcat Apapche 7 server.

Click Finish.

Step – 10

Right click your project and select properties. Select Target Runtime as Apache Tomcat 7.

Step - 11

Create Controller class. Right click your Spring project and select new -> class

Create a class MySpringTestController in package com.nancy.testspringapp.

Click Finish.

Add the following code to the class

package com.nancy.testspringapp;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.AbstractController;

public class MySpringTestController extends AbstractController {

@Override

protected ModelAndView handleRequestInternal(HttpServletRequest request,

HttpServletResponse response) throws Exception {

ModelAndView modelandview = new ModelAndView("MyGreetingsPage");

modelandview.addObject("mygreetingMessage", "hello Welcome to Spring Learning !!!");

return modelandview;

}

Step – 12

Add a new jsp page and name it MyGreetingsPage.jsp in WEB-INF and add the following code.

<%@ 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>

<title>Insert title here</title>

</head>

<body>

<h1>My First Spring Web App</h1>

<h2> ${mygreetingMessage }</h2>

</body>

</html>

Step – 13

Configure web.xml file.

<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

<display-name>MyFirstSpringWebApp</display-name>

<servlet-name>spring-dispatcher</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>spring-dispatcher</servlet-name>

<url-pattern>/</url-pattern>

</servlet-mapping>

</web-app>

Step – 14

Create spring-dispatcher-servlet.xml file in WEB-INF folder. Add the xml code to the file as:

<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">

<bean id="MyHandlerMapping"

class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

<bean name="/greetings.html"

class="com.nancy.testspringapp.MySpringTestController" />

<bean id="viewResolver"

class="org.springframework.web.servlet.view.InternalResourceViewResolver">

</property>

</property>

</bean>

</beans>

You are ready to run your first Spring web application.

Right click the project and Run As -> Run on Server.

You can run the application in internal or external browser by using the url http://localhost:8088/MyFirstSpringWebApp/greetings.html

Enjoy your first Spring Web Application... :)

Java 'n More

Sunday, April 26, 2015

First Spring Application from scratch

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