通过修改配置文件，可直接得到不同的配置对象信息

package com.potevio.zjx.study;

public class Car implements Moveable {

	public void run() {
		System.out.println("Audi奔驰在宽阔的马路上...");
	}

}

 

package com.potevio.zjx.study;

public interface Moveable {

	void run();
}

 

package com.potevio.zjx.study;

public class Train implements Moveable {

	public void run() {
		System.out.println("一辆火车正缓缓驶入北京西站...");
	}

}

 

//VehicleType=com.potevio.zjx.study.Car
VehicleType=com.potevio.zjx.study.Train

 

package com.potevio.zjx.study;

import java.util.Properties;

public class Test {

	public static void main(String[] args) throws Exception {
		Properties props = new Properties();
		props.load(Test.class.getClassLoader()
				.getResourceAsStream("com/potevio/zjx/study/study_pro.properties"));
		String vehicleTypeName = props.getProperty("VehicleType");
		System.out.println("vehicle:"+vehicleTypeName);
		Object o = Class.forName(vehicleTypeName).newInstance();
		Moveable m = (Moveable)o;
		m.run();
	}

}

 通过修改配置文件，可直接得到不同的配置对象信息

Notice:这些文件在同一个包下