[Java] 设计模式之工厂系列 03- spring.properties 的键值读取 / Spring3.0 读取 比较

Moveable

package com.bjsxt.spring.factory;

public interface Moveable {
	void run();
}

Car

package com.bjsxt.spring.factory;

public class Car implements Moveable {

	public void run() {
		System.out.println("冒着烟奔跑中car.......");
	}
}

Train

package com.bjsxt.spring.factory;

public class Train implements Moveable {

	@Override
	public void run() {
		System.out.println("小火车呜呜呜");
	}

}

spring.properties    这里用配置文件，所以不需要更改代码，只需要更改， Car - Train 什么的就好！

VehicleType=com.bjsxt.spring.factory.Car

Test

package com.bjsxt.spring.factory;

import java.io.IOException;
import java.util.Properties;

public class Test {
	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws Exception {
		Properties props = new Properties();
		props.load(Test.class.getClassLoader().getResourceAsStream("com/bjsxt/spring/factory/spring.properties"));
		String vehicleTypeName = props.getProperty("VehicleType");
		System.out.println(vehicleTypeName);
		Object o = Class.forName(vehicleTypeName).newInstance();
		Moveable m = (Moveable)o;
		m.run();
	}
}

---------Spring3.0 读取 比较---------------------- 将所需 jar包 加入 build path----

applicationContext.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-3.0.xsd">

  <bean id="v" class="com.bjsxt.spring.factory.Car">  
  </bean>
  <!--  v=com.bjsxt.spring.factory.Car -->


</beans>

Test

package com.bjsxt.spring.factory;

import java.io.IOException;
import java.util.Properties;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws Exception {
		BeanFactory f = new ClassPathXmlApplicationContext("applicationContext.xml");
		Object o = f.getBean("v");
		Moveable m = (Moveable)o;
		m.run();
	}
}