Bean Injection: Collection List : Properties Injection « Spring « Java Tutorial

1. Java Tutorial
2. Spring
3. Properties Injection

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

    <bean id="collectionsDemo" class="CollectionsDemo">
        <property name="map">
            <map>
                <entry key="someValue">
                    <value>Hello World!</value>
                </entry>
                <entry key="someBean">
                    <ref local="oracle"/>
                </entry>
            </map>
        </property>
        <property name="props">
            <props>
                <prop key="firstName">
                    Jan
                </prop>
                <prop key="secondName">
                    Machacek
                </prop>
            </props>
        </property>
        <property name="set">
            <set>
                <value>Hello World!</value>
                <ref local="oracle"/>
            </set>
        </property>
        <property name="list">
            <list>
                <value>Hello World!</value>
                <ref local="oracle"/>
            </list>
        </property>
    </bean>

    <bean id="oracle" class="BookwormOracle"/>

</beans>

File: Main.java

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

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

public class Main {

  public static void main(String[] args) {
    BeanFactory factory = new XmlBeanFactory(new ClassPathResource("context.xml"));
    CollectionsDemo instance = (CollectionsDemo) factory.getBean("collectionsDemo");
    instance.displayInfo();
  }
}

interface Encyclopedia {
  Long findLong(String entry);
}

interface Oracle {
  String defineMeaningOfLife();
}

class BookwormOracle implements Oracle {
  private Encyclopedia encyclopedia;

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

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

class CollectionsDemo {
  private Map map;

  private Properties props;

  private Set set;

  private List list;

  public void setList(List list) {
    this.list = list;
  }

  public void setSet(Set set) {
    this.set = set;
  }

  public void setMap(Map map) {
    this.map = map;
  }

  public void setProps(Properties props) {
    this.props = props;
  }

  public void displayInfo() {

    // display the Map
    Iterator i = map.keySet().iterator();

    System.out.println("Map contents:\n");
    while (i.hasNext()) {
      Object key = i.next();
      System.out.println("Key: " + key + " - Value: " + map.get(key));
    }

    // display the properties
    i = props.keySet().iterator();
    System.out.println("\nProperties contents:\n");
    while (i.hasNext()) {
      String key = i.next().toString();
      System.out.println("Key: " + key + " - Value: " + props.getProperty(key));
    }

    // display the set
    i = set.iterator();
    System.out.println("\nSet contents:\n");
    while (i.hasNext()) {
      System.out.println("Value: " + i.next());
    }

    // display the list
    i = list.iterator();
    System.out.println("\nList contents:\n");
    while (i.hasNext()) {
      System.out.println("Value: " + i.next());
    }
  }

}

28.5.Properties Injection
	28.5.1.	Fill Map
	28.5.2.	Fill Set
	28.5.3.	Fill Properties
	28.5.4.	Fill List To Another List
	28.5.5.	Fill Calendar Object To List
	28.5.6.	Properties Setting: Date
	28.5.7.	Property Setting Byte Array
	28.5.8.	Property Setting Boolean
	28.5.9.	Property Setting: BigDecimal
	28.5.10.	Property Setting Properties
	28.5.11.	Property Setting Integer
	28.5.12.	Property Setting File
	28.5.13.	Property Setting Class type
	28.5.14.	Property Setting Stream From URL
	28.5.15.	Property Setting: URL
	28.5.16.	Property Setting String Array
	28.5.17.	Fill Value To List
	28.5.18.	Create List, Map In Context
	28.5.19.	Bean Injection: Map
	28.5.20.	Bean Injection: Collection Set
	28.5.21.	Bean Injection Collection Properties
	28.5.22.	Bean Injection: Collection Map
	28.5.23.	Bean Injection: Collection List
	28.5.24.	Load property File In Context