救我呀！

Question

个人认为
错在类型申明
请看定义
public static Class forName(String name,
                            boolean initialize,
                            ClassLoader loader)
                     throws ClassNotFoundException

Answer 1

DriverManager.getConnection()的用法不对。

Answer 2

try
        {
            Class.forName(dbDriver);
            connection = DriverManager.getConnection(dbName,dbUser,dbPassword);
        }
        catch(Exception exception)
        {
            System.out.println( exception );
            connection = null;
        }

Answer 3

eg:
import java.sql.*;
public class mysql {
public static void main(String args[]) {
Connection Conn = null; 
try { 
                Class.forName("org.gjt.mm.mysql.Driver");
                  Conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/dbname?user=bingo;password=truelove"); 
                } 
                catch (Exception E) { 
                    System.out.println("Connection failed : " + E.getMessage()); 
               }
try {
Statement stmt = Conn.createStatement();
        ResultSet rs = stmt.executeQuery("select * from db");
        String tmp=rs.getString(2);
        System.out.println(tmp);
}
catch (SQLException ex) {
System.err.println("aq.executeQuery: " + ex.getMessage());
}
        }
}