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Wednesday, April 20, 2022

[FIXED] How to connect to IntelliJ Ultimate's LocalHost MySQL database?

 April 20, 2022     connection, database, intellij-idea, java, mysql     No comments   

Issue

I went to Database > + > Data Source > MySQL

Here's what my panel looks like: enter image description here

This is the error:

[08S01]
    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.
java.net.ConnectException: Connection refused: connect.

and here's my connection file:

package sample;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBConnection
{

    private static Connection connection;
    private static final String user = "root";
    private static final String password = "root";
    private static final String database = "jdbc:mysql://localhost:3306/user";

    public static Connection getConnection()
    {
        if (connection == null)
        {
            try
            {
                connection = DriverManager.getConnection(database, user, password);
            } catch (SQLException e)
            {
                e.printStackTrace();
                System.out.println("Could not open database.");
                System.exit(1);

            }
        }
        return connection;
    }

}

What could be my problem? I tried searching up for what others have tried but none of them seemed to work and I had to make several copies of my entire project because I kept messing things up trying those solutions to no avail. More specifically Solving a "communications link failure" with JDBC and MySQL


Solution

You need to have MySQL server installed and running to be able to connect to it from the other apps.



Answered By - CrazyCoder
Answer Checked By - Cary Denson (PHPFixing Admin)
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