用类加载器的方式管理资源和配置文件

package ZHANG.Reflect;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.util.Properties;

public class ReflectTest {
public static void main(String[] args) {

try {
//一种方法加载属性文件
//InputStream ips = new FileInputStream("config.properties");
//另一种方法加载属性文件 注意:该文件放到了src目录下
//InputStream ips = ReflectTest.class.getClassLoader().getResourceAsStream("ZHANG/Reflect/config.properties");
InputStream ips = ReflectTest.class.getResourceAsStream("config.properties");
Properties props = new Properties();
props.load(ips);
ips.close();
String classname = props.getProperty("CLASSNAME");
Collection conllections = (Collection) Class.forName(classname).newInstance();

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
}
}

}