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connect to online mysql database (newbie)
Posted by: Lee Boonstra ()
Date: February 23, 2008 05:45AM

Hi there,

I'm training myself on Java Servlets & JSP's.
I know mySQL from my experiences with PHP, so that's why I choosed for a MySQL database. Now I want to test with my local Tomcat (5.0) server, to make a connection to my online database.

I copied the mysql connector jar, in my www-root/WEB-INF/lib
And I wrote this servlet:

package com.ladysign.nl.moodmate.db;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class DatabaseConnect extends HttpServlet{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	Connection conn;
	Statement stmt;
	
	public void init() throws ServletException{
		try{
			Class.forName("com.mysql.jdbc.Driver").newInstance();
		}catch (Exception ex){
			System.out.println("Exception is : " + ex.toString() );
		}
	}
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		processRequest(request, response);
	}  	
	

	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		processRequest(request, response);
	}
	
	private void processRequest(HttpServletRequest request,
			HttpServletResponse response) throws IOException, ServletException{
		
		String host = "212.61.10.22";
		String db = "databasename";
		String username = "myusername";
		String password = "mypass";
		
		try{
			conn = DriverManager.getConnection("jdbc:mysql://" + host + "/" + db, username, password);
			stmt = conn.createStatement();
		} catch(SQLException ex){
			System.out.println("SQLException : " + ex.getMessage() );
		}
	}
}

Now I get this exception back:
Communications link failure
Last packet sent to the server was 0 ms ago.

Is this because I'm connecting to an online database? - And how can I solve this???



Edited 1 time(s). Last edit at 02/23/2008 05:45AM by Lee Boonstra.

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Subject Written By Posted
connect to online mysql database (newbie) Lee Boonstra 02/23/2008 05:45AM
Re: connect to online mysql database (newbie) Rizky Akbar 04/12/2008 05:40AM


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