从JSP连接MySQL

原因是驱动程序尚未加载到库中，它没有在连接中实例化，因此连接失败：

try { String connectionURL = "jdbc:mysql://host/db"; Connection connection = null;  Class.forName("com.mysql.jdbc.Driver").newInstance();  connection = DriverManager.getConnection(connectionURL, "username", "password"); if(!connection.isClosed())      out.println("Successfully connected to " + "MySQL server using TCP/IP..."); connection.close();        }catch(Exception ex){ out.println("Unable to connect to database"+ex);        }

下载驱动