import java.sql.Connection; import java.sql.DriverManager;  public class DB_Helper {   public static void main(String[]args) {               try {       Class.forName("com.mysql.jdbc.Driver"); // 加載MYSQL JDBC驅動程序       System.out.println("加載驅動成功!");     } catch (Exception e) {       System.out.print("加載驅動失敗!");       e.printStackTrace();     }               try {       //public static Connection getConnection(String url,String user,String password)       /*        * url : a database url of the form jdbc:subprotocol:subname        * user : the database user on whose behalf the connection is being made        * password : the user's password        */        Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/students", "root", "");       System.out.println("數據庫連接成功!");     } catch (Exception e) {       System.out.print("數據庫連接失敗!");       e.printStackTrace();     }   } }