Spring: Inject Properties instance

By using <props> element, you can inject java.util.Properties instance.

public class Countries {
 private Properties countryCapitals;

 .....
 .....
}

Following snippet inject countryCapitals to Countries instance.

 <bean id="demoCountryCapitals" name="demoCountryCapitals" class="com.sample.pojo.Countries">
  <property name="countryCapitals">
   <props>
    <prop key="Iceland">Reykjavik</prop>
    <prop key="India">New Delhi</prop>
    <prop key="Indonesia">Jakarta</prop>
    <prop key="Iran">Tehran</prop>
    <prop key="Iraq">Baghdad</prop>
    <prop key="Ireland">Dublin</prop>
    <prop key="Israel">Jerusalem</prop>
    <prop key="Italy">Rome</prop>
   </props>
  </property>
 </bean>

Following is the complete working application.

Countries.java

package com.sample.pojo;

import java.util.Properties;

public class Countries {
 private Properties countryCapitals;

 public Properties getCountryCapitals() {
  return countryCapitals;
 }

 public void setCountryCapitals(Properties countryCapitals) {
  this.countryCapitals = countryCapitals;
 }

}

myConfiguration.xml

<?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="demoCountryCapitals" name="demoCountryCapitals" class="com.sample.pojo.Countries">
  <property name="countryCapitals">
   <props>
    <prop key="Iceland">Reykjavik</prop>
    <prop key="India">New Delhi</prop>
    <prop key="Indonesia">Jakarta</prop>
    <prop key="Iran">Tehran</prop>
    <prop key="Iraq">Baghdad</prop>
    <prop key="Ireland">Dublin</prop>
    <prop key="Israel">Jerusalem</prop>
    <prop key="Italy">Rome</prop>
   </props>
  </property>
 </bean>

</beans>

HelloWorld.java

package com.sample.test;

import java.util.Properties;

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

import com.sample.pojo.Countries;

public class HelloWorld {
 public static void main(String args[]) {
  ApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "myConfiguration.xml" });
  
  Countries countries = context.getBean("demoCountryCapitals", Countries.class);
  
  Properties props = countries.getCountryCapitals();
  
  for(Object country: props.keySet()){
   System.out.println(country + " " + props.getProperty((String) country));
  }
  
  ((ClassPathXmlApplicationContext) context).close();
 }
}

Run HelloWorld.java, you can able to see following output.

Iceland Reykjavik
Iran Tehran
Indonesia Jakarta
Israel Jerusalem
Italy Rome
India New Delhi
Ireland Dublin
Iraq Baghdad

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