<?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:p="http://www.springframework.org/schema/p"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

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

    <bean id="messageRenderer"

        class="com.apress.prospring4.ch3.xml.StandardOutMessageRenderer"

        p:messageProvider-ref="messageProvider"/>

    <bean id="messageProvider"

        class="com.apress.prospring4.ch3.xml.HelloWorldMessageProvider"/>

</beans>

package com.apress.prospring4.ch3;

public interface MessageRenderer {

    void render();

    void setMessageProvider(MessageProvider provider);

    MessageProvider getMessageProvider();

}

package com.apress.prospring4.ch3;

public interface MessageProvider {

    String getMessage();

}

package com.apress.prospring4.ch3.xml;

import com.apress.prospring4.ch3.MessageProvider;

public class HelloWorldMessageProvider implements MessageProvider {

    @Override

    public String getMessage() {

        return "Hello World!";

    }

}

package com.apress.prospring4.ch3.xml;

import com.apress.prospring4.ch3.MessageProvider;

import com.apress.prospring4.ch3.MessageRenderer;

public class StandardOutMessageRenderer implements MessageRenderer {

    private MessageProvider messageProvider;

    @Override

    public void render() {

        if (messageProvider == null) {

            throw new RuntimeException(

            "You must set the property messageProvider of class:"

            + StandardOutMessageRenderer.class.getName());

        }

        System.out.println(messageProvider.getMessage());

    }

    @Override

    public void setMessageProvider(MessageProvider provider) {

        this.messageProvider = provider;

    }

    @Override

    public MessageProvider getMessageProvider() {

        return this.messageProvider;

    }

}

package com.apress.prospring4.ch3;

import org.springframework.context.support.GenericXmlApplicationContext;

public class DeclareSpringComponents {

    public static void main(String[] args) {

        GenericXmlApplicationContext ctx = new GenericXmlApplicationContext();

        ctx.load("classpath:META-INF/spring/app-context-xml.xml");

        ctx.refresh();

        MessageRenderer messageRenderer = ctx.getBean("messageRenderer",

            MessageRenderer.class);

        messageRenderer.render();

    }

}

<?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:c="http://www.springframework.org/schema/c"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

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

    <bean id="messageProvider"

        class="com.apress.prospring4.ch3.xml.ConfigurableMessageProvider"

        c:message="This is a configurable message"/>

    <bean id="constructorConfusion"

        class="com.apress.prospring4.ch3.xml.ConstructorConfusion">

        <constructor-arg type="int">

            <value>90</value>

        </constructor-arg>

    </bean>

</beans>

package com.apress.prospring4.ch3;

public interface MessageProvider {

    String getMessage();

}

package com.apress.prospring4.ch3.xml;

import com.apress.prospring4.ch3.MessageProvider;

public class ConfigurableMessageProvider implements MessageProvider {

    private String message;

    public ConfigurableMessageProvider(String message) {

        this.message = message;

    }

    @Override

    public String getMessage() {

        return message;

    }

}

package com.apress.prospring4.ch3.xml;

import  com.apress.prospring4.ch3.MessageProvider;

import org.springframework.context.support.GenericXmlApplicationContext;

public class ConstructorConfusion {

    private String someValue;

    public ConstructorConfusion(String someValue) {

        System.out.println("ConstructorConfusion(String) called");

        this.someValue = someValue;

    }

    public ConstructorConfusion(int someValue) {

        System.out.println("ConstructorConfusion(int) called");

        this.someValue = "Number: " + Integer.toString(someValue);

    }

    public static void main(String[] args) {

        GenericXmlApplicationContext ctx = new GenericXmlApplicationContext();

        ctx.load("classpath:META-INF/spring/app-context-xml.xml");

        ctx.refresh();

        ConstructorConfusion cc = (ConstructorConfusion) ctx.getBean("constructorConfusion");

        System.out.println(cc); 

        MessageProvider mp = (MessageProvider) ctx.getBean("messageProvider");

        System.out.println(mp.getMessage());

    }

    public String toString() {

        return someValue;

    }

}