How to connect to a remote MySQL database with Java?

Question

I am trying to create a JSF application using the Eclipse IDE. I am using a remote mySQL server as my database. How do I connect to this remote database for creating tables and accessing them?

Answer 1

Just supply the IP / hostname of the remote machine in your database connection string, instead of localhost . For example:

jdbc:mysql://192.168.15.25:3306/yourdatabase

Make sure there is no firewall blocking the access to port 3306

Also, make sure the user you are connecting with is allowed to connect from this particular hostname. For development environments it is safe to do this by 'username'@'%' . Check the user creation manual and the GRANT manual .

Answer 2

You need to pass IP/hostname of the rempote machine in the connection string.

import java.sql.*;
import javax.sql.*;

public class Connect
{
   public static void main (String[] args)
   {
       Connection conn = null;

       try
       {

           String url = "jdbc:mysql://localhost:3306/mydb";
           Class.forName ("com.mysql.jdbc.Driver");
           conn = DriverManager.getConnection (url,"root"," ");
           System.out.println ("Database connection established");
       }
       catch (Exception e)
       {
           e.printStackTrace();

       }
       finally
       {
           if (conn != null)
           {
               try
               {
                   conn.close ();
                   System.out.println ("Database connection terminated");
               }
               catch (Exception e) { /* ignore close errors */ }
           }
       }
   }
}

Answer 3

to access database from remote machine , you need to give grant all privileges to you data base.

run the following script to give permissions: GRANT ALL PRIVILEGES ON . TO user@'%' IDENTIFIED BY 'password';

Answer 4

另外，你应该确保MySQL服务器的配置（Debian上的/etc/mysql/my.cnf,/ etc / default / mysql）没有激活“skip-networking”，并且没有专门绑定到loopback接口（127.0） .0.1）还要连接到您要连接的接口/ IP地址。

Answer 5

1. Create a new user in the schema 'mysql' (mysql.user) Run this code in your mysql work space “GRANT ALL ON . to user@'%'IDENTIFIED BY ''; “GRANT ALL ON . to user@'%'IDENTIFIED BY '';

2. Open the '3306' port at the machine which is having the Data Base. Control Panel -> Windows Firewall -> Advance Settings -> Inbound Rules -> New Rule -> Port -> Next -> TCP & set port as 3306 -> Next -> Next -> Next -> Fill Name and Description -> Finish ->

3. Try to check by a telnet msg on cmd including DB server's IP

Answer 6

Close all the connection which is open & connected to the server listen port, whatever it is from application or client side tool (navicat) or on running server (apache or weblogic). First close all connection then restart all tools MySQL,apache etc.

Answer 7

in my.cnf file , please change the following

## Instead of skip-networking the default is now to listen only on ## localhost which is more compatible and is not less secure. ## bind-address = 127.0.0.1

Answer 8

On Ubuntu, after creating localhost and '%' versions of the user, and granting appropriate access to database.tables for both, I had to comment out the 'bind-address' in /etc/mysql/mysql.conf.d/mysql.cnf and restart mysql as sudo.

bind-address = 127.0.0.1

Answer 9

Change the IP / hostname of the vps in your database connection string, instead of localhost. For example if my IP is 193.23.127.130:

jdbc:mysql://193.23.127.130:3306/yourdatabase

then make sure your vps firewall allow port 3306 for MySQL.

Then go to MySQL workbench, Server–Users and Privileges, create an account (in this case account: remoteUser, password:password), make sure Limit to Hosts Matching is % (means you can access from any other IP)

Then set password and grant rights then apply

then you can add the following code in Java to access remotely

Connection connection = DriverManager.getConnection("jdbc:mysql://193.23.127.130:3306/swing_demo", "remoteUser", "password");