Comments on: Accessing MySQL on NetBeans using JDBC, Part I: Create a connection

By: ammouna

ammouna — Sat, 28 Jan 2012 01:30:04 +0000

i have a big problem can someone help me please,
i’m using netbeans7.1 and mysql5.5 i want to connect the BD with the interface jframe.but i always have this exception:
“SQL Exception: java.sql.SQLException: Access denied for user ‘root’@'localhost’ (using password: YES)”

also i created 4 jframe in the same package when i click the button in the first one the second must show up but it doesn’t.so what i must do???please help me because this application is for the stage!!!!

By: mohan

mohan — Fri, 20 Jan 2012 14:40:15 +0000

I have an error like this please help me……..
“Class Not Found Exception: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver”………….

By: deep

deep — Tue, 17 Jan 2012 08:17:25 +0000

as per step 3 i clicked to the button add jar file but it cant open the new window so i can add the jar file…..

By: roshni

roshni — Mon, 16 Jan 2012 16:45:59 +0000

need help,,
i added jar file,bt still not working..error as no driver found..what to do?????

By: aids

aids — Thu, 12 Jan 2012 12:24:24 +0000

You are whalecum

By: biju medayil

biju medayil — Thu, 12 Jan 2012 11:59:12 +0000

@jakoyoski
Change the first line in try Block To
‘Class.forName(“com.mysql.jdbc.Driver”).newInstance();’

Also check the mysql connector jar file in your Class Path

By: sandeep.rai

sandeep.rai — Thu, 12 Jan 2012 11:43:27 +0000

thankxxx alot man !!!!!!

By: aids

aids — Thu, 12 Jan 2012 08:58:24 +0000

Aids

By: jakoyoski

jakoyoski — Tue, 06 Dec 2011 06:05:52 +0000

am developing a web based eshop on JEE platform. my application can not connect to the database the following is the code am using to connect

package org.grb.controller;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;

//
public class loginServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException {
String username=req.getParameter(“username”);
String password=req.getParameter(“password”);

res.setContentType(“text/jsp”);
PrintWriter out = res.getWriter();
System.out.println(username);
System.out.println(password);
try {
Class.forName(“com.mysql.jdbc.Driver”);
Connection con=DriverManager.getConnection(“jdbc:mysql://localhost:3306/e_shop”,”",”");
Statement stmt=con.createStatement();
String sql=(“insert into loginTable(username,password) values(‘username’,'password’)”);
stmt.executeUpdate(sql);
out.println(“Message successfully added!”);
con.close();
}
catch(Exception e){
System.out.println(e);
}
}
}

By: mike

mike — Wed, 30 Nov 2011 17:36:05 +0000

run:
SQL Exception: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
BUILD SUCCESSFUL (total time: 9 seconds)

hello everyone, can you please help me determine what’s wrong.i follow the instructions, then when i run the code that is the output.