DbUtil和Result接口

public class DbUtil {
	/*private Connection conn;
	private Statement sta;*/
	private static String url="jdbc:mysql://localhost:3306/";
	private static String user="root";
	private static String password="";
	static
	{
		
		try {
			Class.forName("com.mysql.jdbc.Driver");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static Connection getConnection()
	{
		 Connection conn = null;
		try {
			 conn= DriverManager.getConnection(url, user, password);
			return conn;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;
		
		
	}
	public static void close(Connection conn,Statement stmt)
	{
		if (stmt!=null) {
			try {
				stmt.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if (conn!=null) {
			try {
				stmt.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

}