Simple program with Spring + Maven

The below simple program developed with Spring and maven configuration.

Technologies used:

1.Eclipse Indigo

2.Jdk 1.6

3.Maven 3.0.4

4.Spring 3.2.3

Note: If any image is not able to see properly, please click on that image. It will show nice visible mode.

Step 1: Open eclipse, File àNew à Maven à Maven Project. Its look like below.

Step 2: Once you create maven project , select (tick) create a simple project. you will see the below in next screen. 

Step 3: Click Next. You will see below in next screen. Please provide Group Id and Artifact Id which is related to maven. Its look like below.

Here I provided,

Group Id : com.test

Artifact Id: helloworld

Group Id: It will identify your project uniquely across all your projects. It has to follow package name rules (Naming schema). 

Artifact Id: Project name as artifact id for the purpose of JAR. Always put frinedly name here.

Step 4: Once you click finish on above screen , the next screen will appear like below. This is your project structure now.

Step 5: Please add the below in pom.xml. Here you can add all of your dependency, properties etc.,

  4.0.0
  com.test
  helloworld
  0.0.1-SNAPSHOT
  
  
  
   org.springframework
   spring-core
   ${spring.version}
  
  
   org.springframework
   spring-context
   ${spring.version}
  
 
 
 
  3.2.3.RELEASE
 

Step 6: Once you configured pom xml, next you should add application context xml for your project bean definition. So , create one xml like below under src/main/resources.

Once xml file was created, add the below bean definitons.

Step7 : After adding application context xml, add your java class with the name of  HelloService. That java class looks like below.

package com.test.helloworld;

import org.springframework.stereotype.Service;
 
@Service("helloWorld")
public class HelloService {
 
 private String name;
 
 public void setName(String name) {
  this.name = name;
 }
 
 public String sayHello() {
  return "Hello ! Spring + Maven Test by " + name;
 }
}

Note: Here @Service annotation is not mandatory, without this also program will run. But in generally, its good to add before call will go from this class to any DAO class etc.,

Step 8: The above java class implemented at service layer level. So I used there @Service annotation. We can see it deeply later.

Now I need to test it, means should call above java class from HelloTest java class. The implemented class for HelloTest is below.

package com.test.helloworld;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class HelloTest {
  
 
 public static void main(String[] args) {
 
  // loading bean definitions from applicationcontext.xml
  ApplicationContext context = new ClassPathXmlApplicationContext(
    "applicationContext.xml");
 
  HelloService service = (HelloService) context
    .getBean("helloWorld");
  String message = service.sayHello();
  System.out.println(message);
 
  //set your new name
  service.setName("Setting again new name : TestHelloWorld ");
  message = service.sayHello();
  System.out.println(message);
 }
}

Step 9 : Next we should and clean and build through maven. You can directly run this application from main method of HelloTest java. Since it is a maven project, it is advice to follow through clean and install maven option .

Right click on your pom xml or on project , select Run As --> Maven Clean.
Below images will explain clearly.

Step 10 :  Once maven clean done, you should build the application.

Right click on your pom xml or on project , select Run As --> Maven Install. It will build your project. The below images will explain that.

Step 11: After build your project , you able to see below screen. In case if your project have any Test class(Junit) it will refelect in console tab.

Step 12: After finishing maven clean and install, Run your application .

Right click on HelloTest program, Run As --> Java application. Below output we can see.

Please raise comment in case if you have any clarification.

Thats All. Happy learning!