XML Based Bean Configuration : XML Bean « Spring « Java Tutorial

1. Java Tutorial
2. Spring
3. XML Bean

File: Main.java

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;

public class Main {
  public static void main(String[] a) {
    XmlBeanFactory bf = new XmlBeanFactory(new ClassPathResource("context.xml"));

    Oracle oracle = (Oracle) bf.getBean("oracle");
    System.out.println("Meaning of life is " + oracle.defineMeaningOfLife());
  }
}

interface Oracle {

  String defineMeaningOfLife();

}
interface Encyclopedia {

  Long findLong(String entry);
  
}
class BookwormOracle implements Oracle {
  private Encyclopedia encyclopedia;

  public String defineMeaningOfLife() {
      Long ageOfUniverse = this.encyclopedia.findLong("A");
      Long constantOfLife = this.encyclopedia.findLong("C");
      return String.valueOf(ageOfUniverse / constantOfLife);
  }

  public void setEncyclopedia(Encyclopedia encyclopedia) {
      this.encyclopedia = encyclopedia;
  }
}


class HardcodedEncyclopedia implements Encyclopedia {
  private Map<String, Long> entryValues = new HashMap<String, Long>();

  public HardcodedEncyclopedia() {
      this.entryValues.put("A", 1L);
      this.entryValues.put("C", 3L);
  }

  public Long findLong(String entry) {
      return this.entryValues.get(entry);
  }
}

File: context.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"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="
                http://www.springframework.org/schema/beans
                http://www.springframework.org/schema/beans/spring-beans.xsd
                http://www.springframework.org/schema/util
                http://www.springframework.org/schema/util/spring-util.xsd">

    <bean id="encyclopedia" class="HardcodedEncyclopedia"/>

    <bean id="oracle" class="BookwormOracle">
        <property name="encyclopedia" ref="encyclopedia"/>
    </bean>



</beans>

28.4.XML Bean
	28.4.1.	XML Bean Injection with namespace
	28.4.2.	BeanName Aware
	28.4.3.	XML Based Bean Configuration
	28.4.4.	Required Property Not Set Exception
	28.4.5.	Method Loopup
	28.4.6.	Local Reference
	28.4.7.	Inheritance Demo
	28.4.8.	Get Method By Name
	28.4.9.	Factory Object Integration
	28.4.10.	Spring factory method
	28.4.11.	Factory Bean Demo
	28.4.12.	Autowiring
	28.4.13.	Annotation Component
	28.4.14.	Annotated Autowiring
	28.4.15.	Alias Bean Demo
	28.4.16.	After Returning Advice Demo