# Spring Context Configuration using with XML file

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Published 2022-12-03

This tutorial explains to you how Spring Context Configuration is done using one XML file. This tutorial has an example as well.

Spring context is a Spring container which is responsible for instantiating, configuring, and assembling beans by reading configuration metadata from XML files, Java annotations or both.

In order to create and configure a Spring context using a XML file you have to create a Maven Spring project.

Here it is the Maven pom.xml file dependencies:

After that you have to create the following XML configuration file:

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

  <bean id="carCurrentSpeed" class="com.example.beans.CurrentSpeed">
    <constructor-arg name="speed" value="100" />
  </bean>

</beans>

Add the following classes:

package com.example.main;
 
import org.springframework.context.support.FileSystemXmlApplicationContext;
 
import com.example.beans.CurrentSpeed;

public class Main {
 
   public static void main (String [] args) {
     
      System.out.println("Start Java Application ...");
         
      //The Spring context is configured from a Java Class for a Java Application 
      // (Not for a Web Application)
      // FileSystemXmlApplicationContext --> used when the context is defined in an xml file.
      FileSystemXmlApplicationContext context 
            = new FileSystemXmlApplicationContext("C:\\Java\\SPRING\\workspace\\SpringXmlContextConfig\\src\\com\\example\\config\\myContextConfig.xml");
             
      System.out.println("Spring context created ...");
          
      //GET an instance from context BY CLASS
      // SINGLETON by default in Spring
      CurrentSpeed cSpeed =  context.getBean(CurrentSpeed.class);
          
      System.out.println("Current speed = "+cSpeed.getSpeed());
          
      //Change the speed for the context bean
      cSpeed.setSpeed(20);
             
      CurrentSpeed cSpeed2 =  context.getBean(CurrentSpeed.class);
      System.out.println("Current speed = "+cSpeed2.getSpeed());
          
      //GET an instance from context BY NAME
      CurrentSpeed cSpeed3 =  context.getBean("carCurrentSpeed", CurrentSpeed.class);
      System.out.println("Current speed = "+cSpeed3.getSpeed());
          
      context.close();
   }
}

package com.example.beans;
 
public class CurrentSpeed {
 
    private int speed;
 
    public CurrentSpeed() {
        this.speed = 0;     
    }
     
    public CurrentSpeed(int speed) {
        this.speed = speed;     
    }
     
    public int getSpeed() {
        return this.speed;
    }
 
    public void setSpeed(int cSpeed) {
        this.speed = cSpeed;
    }
}

When you run the code you will se the following result :