Servlet mySQL help needed

Question

Hey Guys... I have a servlet located on the same server as my mySQL database, which is supposed to gather data from the database. Then I have client code, which is supposed to connect to the servlet from some other remote machine, and get the data from the servlet. I had to do it this way because my webhost does not allow remote access to the mySQL database. But my servlet code is not working, no data is being gathered. And I'm betting my client code is incorrect too. I've never had to connect to a servlet from a remote app, I've always connected directly to the database...sooo could you check my code and show me what is wrong and how to do it correctly? (note I XXX'ed out passwords, etc) Thank you...
LOCAL SERVLET
public class ServletTest extends HttpServlet
     public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException
         response.setContentType("text/html");
          PrintWriter out = response.getWriter();
         Connection myConnection;
        Statement myStatement;
        String url="jdbc:mysql://localhost/tsptracker_com?user=XXX&password=XXX";
        String query = "SELECT * FROM fund_data ORDER BY datadate DESC LIMIT 2";
        try { Class.forName("org.gjt.mm.mysql.Driver").newInstance(); }
        catch (Exception e)
        { System.err.print("Unable to load driver"); }
        try
            myConnection = DriverManager.getConnection (url, XXX, XXX);
            myStatement = myConnection.createStatement();
            ResultSet rs = myStatement.executeQuery(query);
            for(int i = 0; i < 4; i++)
                  int id = rs.getInt("dataID");
                  String dataDate = rs.getString("datadate");
                  double gPrice = rs.getDouble("g_price");
                  double fPrice = rs.getDouble("f_price");
                  double cPrice = rs.getDouble("c_price");
                  double sPrice = rs.getDouble("s_price");
                  double iPrice = rs.getDouble("i_price");
                  String temp = id + " " + dataDate + " " + gPrice + " " +
                       fPrice + " " + cPrice + " " + sPrice + " " + iPrice;
                 out.println(temp);
            myStatement.close();
            myConnection.close();
        catch(SQLException e)
        { System.err.println(e.getMessage()); }
        out.close();
}REMOTE CLIENT
public class ClientTest
     public static void main(String[] args) throws Exception
          URL url = new URL("http://www.XXX.com/servlet/Test");
          URLConnection con = url.openConnection();
          con.setDoOutput(false);
          con.setDoInput(true);
          con.setUseCaches(false);
          InputStream in = con.getInputStream();
          String buffer = "";
          for(int i = in.read(); i != -1; i = in.read())
        { buffer += (char)i; }
          in.close();
          System.out.println(buffer + "");
}

Answer 1

Hello kkopacz,
From your code, some of the assumptions seems to appear :
1) You are having Your Servlet Container and MySql on the same machine.
2) You are providing your user name and password in your URL for the MySql Driver.
3) You have mapped the 'ServletTest' class's object by '/servlet/Test' in your Deployment
Descriptor(web.xml).
4) You are assuming at least four records in your MySql database : tsptracker_com [ This should be in fact in your while(rs.next()) loop at least though not checked for rs to be null ]
I would say, try with following changes in your code,
1) insted of 'myConnection = DriverManager.getConnection (url, XXX, XXX);' in ServletTest
only say 'myConnection = DriverManager.getConnection (url)', since you are already giving as a part of dbase URL , uname and pwd.
2) In your ClientTest, try following code
public class ClientTest
     public static void main(String[] args) throws Exception
          URL url = new URL("http://www.XXX.com/servlet/Test");
// Since http URL and also set content type in response test/html,
// U can use HttpURLConnection object.
          HttpURLConnection con = (HttpURLConnection) url.openConnection();
if(con.getContentLength() == -1) {
con.connect();
          InputStream in = con.getInputStream();
          String buffer = "";
          for(int i = in.read(); i != -1; i = in.read()) {
buffer += (char)i;
          in.close();
          System.out.println(buffer + "");
I hope this should work fine.
Main prob seems to be in your code, is you are giving unmae and paswd again.. and assumption of recod numbers.
Anyway, I think this should work for you.
Cheers
-Yogi