java 读取*.properties配置文件

package tfq.factory.spring;

public interface Moveable {

void run();

}

package tfq.factory.spring;

import tfq.factory.spring.Moveable;

public class Car implements Moveable{

@Override

public void run(){

System.out.println("Car drive....");

}

}

package tfq.factory.spring;

import tfq.factory.spring.Moveable;

public class Tain implements Moveable{

@Override

public void run() {

System.out.println("Train...");

}

}

//配置文件(spring.properties)

VehicleType=tfq.factory.spring.Tain

//测试读取配置文件类

package tfq.factory.spring;

import java.io.IOException;

import java.util.Properties;

public class TestSpring {

public static void main(String[] args) throws ClassNotFoundException,

InstantiationException, IllegalAccessException {

//实例化一个读取配置文件对象

Properties pros=new Properties();

try {

//加载配置文件到内存

pros.load(TestSpring.class.getResourceAsStream("/tfq/factory/spring/spring.properties"));

//调取配置文件中key

String vehicleType=pros.getProperty("VehicleType");

System.out.println(vehicleType);

//将配置文件中的类强转成Object

Object object=Class.forName(vehicleType).newInstance();

Moveable m=(Moveable)object;

m.run();

} catch (IOException e) {

e.printStackTrace();

}

}

}