Simple Inject By Name : IoC Injection « Spring « Java

1. Java
2. Spring
3. IoC Injection

Simple Inject By Name

/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/



///////////////////////////////////////////////////////////////////////////////////////
//File: beans.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <!-- injecting built-in vals sample -->
    <bean id="injectSimple" class="InjectSimple">
        <property name="name">
            <value>John Smith</value>
        </property>
        <property name="age">
            <value>35</value>
        </property>
        <property name="height">
            <value>1.78</value>
        </property>
        <property name="isProgrammer">
            <value>true</value>
        </property>
        <property name="ageInSeconds">
            <value>1103760000</value>
        </property>
    </bean>
    
    <!-- oracle bean used for a few examples -->
    <bean id="oracle" name="wiseworm" class="BookwormOracle"/>
    
    <!-- injecting reference sample (using id)
    <bean id="injectRef" class="InjectRef">
        <property name="oracle">
            <ref local="oracle"/>
        </property>
    </bean>
     -->
    <!-- inject ref sample (using name) -->
    <bean id="injectRef" class="InjectRef">
        <property name="oracle">
            <ref bean="wiseworm"/>
        </property>
    </bean>
</beans>



///////////////////////////////////////////////////////////////////////////////////////
public interface Oracle {

    public String defineMeaningOfLife();
}



///////////////////////////////////////////////////////////////////////////////////////


public class BookwormOracle implements Oracle {

    private Encyclopedia enc;

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

    public String defineMeaningOfLife() {
        return "Encyclopedia's are a waste of money - use the Internet";
    }

}



///////////////////////////////////////////////////////////////////////////////////////

public class Encyclopedia {

}


///////////////////////////////////////////////////////////////////////////////////////


public class InjectRef {

    private Oracle oracle;
    
    public void setOracle(Oracle oracle) {
        this.oracle = oracle;
        System.out.println(oracle.defineMeaningOfLife());
    }
}

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

public class InjectSimple {

    private String name;

    private int age;

    private float height;

    private boolean isProgrammer;

    private Long ageInSeconds;

    public static void main(String[] args) {
        BeanFactory factory = new XmlBeanFactory(new FileSystemResource(
                "build/beans.xml"));
        InjectSimple simple = (InjectSimple)factory.getBean("injectSimple");
        factory.getBean("injectRef");
        System.out.println(simple);
    }

    public void setAgeInSeconds(Long ageInSeconds) {
        this.ageInSeconds = ageInSeconds;
    }

    public void setIsProgrammer(boolean isProgrammer) {
        this.isProgrammer = isProgrammer;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setHeight(float height) {
        this.height = height;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String toString() {
        return    "Name :" + name + "\n"
                + "Age:" + age + "\n"
                + "Age in Seconds: " + ageInSeconds + "\n"
                + "Height: " + height + "\n"
                + "Is Programmer?: " + isProgrammer;
    }
}
           
       

SimpleInjectByName.zip( 1,200 k)

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