如何修复 SQLException "no suitable driver found for jdbc "？

Question

我正在尝试连接到我的咖啡数据库以插入数据，但每次我运行代码都显示

No suitable driver found for jdbc:derby://localhost:1527/coffeeZone

我试过使用这个 Class.forName("dbc:derby://localhost:1527/coffeeZone"); 我的 mac

上也有 mysql jdbc 驱动程序

    String query="INSERT INTO `coffeeZone`.`branch` (`branch_Num`, `admin_id`, `Street`, `Nieghbourhood`) VALUES ('?', '?', '?', '?');";

          try{

      PreparedStatement ps;
      String f="jdbc:derby://localhost:1527/coffeeZone [coffee on COFFEE]";

      connection = DriverManager.getConnection(
            f, "coffee", "1234"); 
       ps=connection.prepareStatement(query);
        ps.setString(1, bno);
        ps.setString(2, strt);
       ps.setString(3, nbh);
        ps.setString(4, ci);
   if  (ps.executeUpdate()>0){


                    JOptionPane.showMessageDialog(null, "Complete! a new branch is added !");
               }else
               {
                   JOptionPane.showMessageDialog(null, "User already exists");
               }

    }        catch (SQLException ex) {
           JOptionPane.showMessageDialog(null,ex);
    }                                       

    }

Answer 1

看起来您需要在建立连接之前调用 Class.forName("com.mysql.jdbc.Driver")，基于此连接字符串：jdbc:mysql://localhost/dbname.

编辑：如果您使用的是 Derby，则需要：Class.forName("org.apache.derby.jdbc.EmbeddedDriver"); (https://db.apache.org/derby/docs/10.4/devguide/cdevdvlp40653.html).

您 post 得到了您遇到的确切错误吗？错误指的是 MySql 连接但代码使用 Derby 连接字符串似乎很奇怪。

如何修复 SQLException "no suitable driver found for jdbc "？

how to fix SQLException "no suitable driver found for jdbc "?

java

jdbc

derby