如何使用NetBeans中的相对路径加载文件

import java.io.*;
import java.util.Properties;

public class NewClass {
    public static void main(String args[]) throws IOException  {
        Properties p = new Properties();
        p.load(new FileInputStream("DBDriverInfo.properties"));
        String url=p.getProperty("url");
        String user=p.getProperty("username");
        String pass=p.getProperty("password");
        System.out.println(url+"\n"+user+"\n"+pass);
    }
}
import java.io.*;
import java.util.Properties;