SpringDemoMain.txt

  

Maven project ->

qucik start archetype

jdk 8

Spring jar are downloaded by adding the below dependency:

----------------------------------

pom.xml-> project object model

<dependency>
  	<groupId>org.springframework</groupId>
  	<artifactId>spring-core</artifactId>
  	<version>5.0.5.RELEASE</version>
  </dependency>
  <dependency>
  	<groupId>org.springframework</groupId>
  	<artifactId>spring-beans</artifactId>
  	<version>5.0.5.RELEASE</version>
  </dependency>
  <dependency>
  	<groupId>org.springframework</groupId>
  	<artifactId>spring-context</artifactId>
  	<version>5.0.5.RELEASE</version>
  </dependency>
  <dependency>
  	<groupId>junit</groupId>
  	<artifactId>junit</artifactId>
  	<version>4.12</version>
  </dependency>
  

File -> save jar is downloaded (if internet is live)-> Maven lib
-----------------------------------------
package com.niit.SpringDemoMain;

public interface HelloWorld {

	public String sayHello();
	
}

-------------------------------------

package config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import com.niit.SpringDemoMain.*;

@Configuration

@ComponentScan(basePackages="com.niit")
public class AppConfig {

	@Bean(name="helloworld")
	
public HelloWorld getHelloworld()
	{
		
	return new HelloWorld() {

				public String sayHello() {
					// TODO Auto-generated method stub
					return "welcome to spring";
				}
				
				
		          };
		
	}
}
----------------------------------------------	
package com.niit.SpringDemoMain;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import config.AppConfig;
public class App 
{
    public static void main( String[] args )
    {
       
       System.out.println( "Hello World!" );
        AbstractApplicationContext ctx=new   
       		 AnnotationConfigApplicationContext(AppConfig.class);
        HelloWorld h= (HelloWorld)ctx.getBean("hello");
     System.out.println(h.sayHello());    
    }
}
-------------------------------------