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.
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.
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.
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.
Right click on HelloTest program, Run As --> Java application. Below output we can see.
Thats All. Happy learning!
