Dinesh on Java

myMessage.properties

greeting=Hello Dinesh!
drawing.circle=Circle is Drawn!

spring.xml

<beans xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:>
 
Now "messageSource" using as property of the bean circle as follows:
Circle.java
package com.dineshonjava.sdnext.tutorial.property;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.stereotype.Component;

/**
 * @author Dinesh Rajput
 *
 */
@Component
public class Circle
{
 @Autowired
 private Point center;
 @Autowired
 private MessageSource messageSource;

 /**
  * @param messageSource the messageSource to set
  */
 public void setMessageSource(MessageSource messageSource) 
 {
  this.messageSource = messageSource;
 }

 /**
  * @param center the center to set
  */
 public void setCenter(Point center)
 {
  this.center = center;
 }

 public void draw()
 {
System.out.println(this.messageSource.getMessage("drawing.circle", null, "Default Drawing Greeting", null));
 }
}

 
In the above class file two property "center" and "messageSource" which autowired with the bean name "circle". We get the message of the properties file in the draw() method by using following method
 
org.springframework.context.MessageSource.getMessage(String arg0, Object[] arg1, String arg2, Locale arg3)
 
where String arg0 give the key of properties file to read its related message.
as our example we are using "drawing.circle" and "greeting" as keys.
 
Object[] arg1 is the array of parameters which are applied to the properties file.
Example.
drawing.point=Circle: Point is: ({0}, {1})

Here there are two parameters {0}, {1} passes as

getMessage("drawing.point", new Object[]{center.getX(), center.getY()}, "Default Drawing Greeting", null)

Here center.getX() is replace with the {0}
and center.getY() is replace with the {1}
Point.java
package com.dineshonjava.sdnext.tutorial.property;

/**
 * @author Dinesh Rajput
 *
 */
public class Point 
{
 private int x;
 private int y;
 /**
  * @return the x
  */
 public int getX() 
 {
  return x;
 }
 /**
  * @param x the x to set
  */
 public void setX(int x) 
 {
  this.x = x;
 }
 /**
  * @return the y
  */
 public int getY()
 {
  return y;
 }
 /**
  * @param y the y to set
  */
 public void setY(int y)
 {
  this.y = y;
 } 
}

 
Now run the following class file.
DrawingApp.java
package com.dineshonjava.sdnext.tutorial.property;

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

/**
 * @author Dinesh Rajput
 *
 */
public class DrawingApp
{

 /**
  * @param args
  */
 public static void main(String[] args)
 {
ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
System.out.println(context.getMessage("greeting", null, "Default Greeting", null));
Circle circle = (Circle)context.getBean("circle");
shape.draw();
 }
}

 
If every thing ok then we get the following output:

Output:
Jul 18, 2012 9:04:33 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@758fc9: startup date [Wed Jul 18 21:04:33 IST 2012]; root of context hierarchy
Jul 18, 2012 9:04:33 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [spring.xml]
Jul 18, 2012 9:04:34 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1238bd2: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,circle,center,messageSource,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy
Hello Dinesh!

Circle is Drawn!