用静态代码块读取数据库配置文件：tResourceAsStream的配置文件路径问题

package properTest;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class Test {
public static String driver = null;
public static String url = null;
public static String username = null;
public static String password =null;

static{
InputStream inputStream = String.class.getResourceAsStream("/db.properties");
Properties properties = new Properties();
try {
properties.load(inputStream);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
driver = properties.getProperty("driver");
url = properties.getProperty("url");
username = properties.getProperty("username");
password = properties.getProperty("password");
}
}