can't connect to MySQL on localhost

Question

i am trying to connect to Mysql database using the code below , yet my attempt fails.

this is my attempt:

private static Connection conn = null;
private static  String url = "jdbc:mysql://localhost/";
private static String dbName = "proj1";
private static   String driver = "com.mysql.jdbc.Driver";
private static String userName = "root";
private static String password = "root";



public static  int setupConnection ()
{
    try{
    Class.forName(driver).newInstance();
    conn = DriverManager.getConnection(url+dbName,"root","root");
    return 1;

    }
    catch (Exception e)
    {
        JOptionPane.showMessageDialog(null, e.getMessage());
      return 0;
    }

}

when installing MySQL i remember entering the password "root" , but im not 100% sure if the username is autmatically assigned "root" , i really appreciate your help.

i get the error message : com.mysql.jdbc.Driver

Answer 1

You need to add the MySQL Connector/J driver to the build-path/classpath of your Netbeans project. Otherwise it cannot be loaded.

Answer 2

Unfortunately you did not mention what kind of failure you got. But here are some tips.

My JDBC URL looks like the following. jdbc:mysql://localhost:3306/MYSCHEMA . So port and schema name are missing in yours.

To check your credentials try to connect to your DB using command line client:

mysql -uroot -proot

Read the error message if you fail. If you cannot restore credentials, re-install MySql. It takes 3 minutes. Do not try to connect to DB using your code unless you can do it using existing clients.

Good luck.

Answer 3

you should connect to port address 3306, change the url as below :

private static  String url = "jdbc:mysql://localhost:3306/";

I am considering that you are not getting any compilation error and you have added mysql java api..

Answer 4

Start by trying to log into mysql from a command shell. If you can't, JDBC won't be able to, either.

This might help if you can't remember:

http://www.cyberciti.biz/tips/recover-mysql-root-password.html