java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

Question

Why do you think this function gives me always null?? Using another login program, which has the same code structure, it works greatly. My DBURL is jdbc:mysql://localhost:8889/database

    public String retrieveUserPassword(String userName, String password) {

    String query = "SELECT UserPassword FROM Access where UserName='"+userName+"'";
    String dbresult=null; //this might be the problem, but I must define it

    try {
      Class.forName("com.mysql.jdbc.Driver");

    }catch (ClassNotFoundException ex1) {

      System.out.println("Driver could not be loaded: " + ex1);
      Logger.getLogger(DatabaseModel.class.getName()).log(Level.SEVERE, null, ex1);
    }
    try {

          //These are private variables declared at the top of the class 
          //and used by various functions   
          con = DriverManager.getConnection(DatabaseURL, userName, password);   
          st = con.createStatement(); 
          rs = st.executeQuery(query);

            if(rs.next()){

                dbresult= rs.getString(3);
            }

     }catch (SQLException e) {

      e.printStackTrace();
     }    

  return dbresult;

}

The Access table is composed of three columns: UserID, UserName, UserPassword

Solution

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

As you have mentioned problem is with creating connection with the database itself. Statement

con = DriverManager.getConnection(DatabaseURL, userName, password);

is throwing exception which is getting caught at

catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }   

after which you are returning dbresult which you have initialized to null(which you have to as it is a local variable). So the problem is that you are unable to connect to your db due to authentication.

On your machine where (localhost in ur case ) run the following command from console

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'root' WITH GRANT OPTION;

Comments

[QGA]

I love you, however, I have not got why it worked with my previous code without granting access