JSP with MYSQL.

Question

Dear Friends
I have a unique problem in java, when i try to connect to mysql db.
It shows an error message:
Unable to load driver. Getting Connection ... SQLException: No suitable driverI am using mysql MySQL 4.1.9 and tomcat 5.5 version.
though i have loaded the driver in lib directory, it still displays the same error
messgae. Here is the jsp file which i use to connect to my database.
http://localhost:8080/mysqljdbc.jsp
<%@ page import="java.net.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@ page import="java.sql.*" %>
<%
     try{
     Class.forName("com.mysql.jdbc.Driver").newInstance();
     catch (Exception E) {
     out.println("Unable to load driver.");
     E.printStackTrace();
     try{
          out.println("Getting Connection ...");
          Connection C = DriverManager.getConnection("jdbc:mysql://localhost:3306/vinoth");
          out.println("<br>Connected:  " + !C.isClosed() + "<br>\n");
          out.println("Catalog:  " + C.getCatalog() + "<br>\n");
               Statement S = C.createStatement();
               ResultSet rs = S.executeQuery("SELECT * FROM foo");
               ResultSetMetaData rsStruc = rs.getMetaData();
               out.println("Table:  " + rsStruc.getTableName(1) + "<br>");
               out.println("<table bgcolor=c8c8c8 cellpadding=5 cellspacing=1>");
               out.println("<tr bgcolor=000000>");
               int colCount = rsStruc.getColumnCount();
               String colName = "";
               for(int i=1;i <= colCount; i++){
               colName = rsStruc.getColumnName(i) ;
               out.println("<td><B><font color=white>" + colName + "</font></b></td>\n");
               out.println("</tr>");
               while (rs.next()) {
               out.println("<tr bgcolor=ffffff>");
               for(int i=1;i <= colCount; i++){
               colName = rsStruc.getColumnName(i) ;
               String fld = rs.getString(colName);
                    out.println("<td>" + fld + "</td>");
               out.println("</tr>");
               out.println("</table>");
               rs.close();
               C.close();
     catch (Exception E) {
      out.println("SQLException: " + E.getMessage());
%>Now is there anything i have to configure apart from this.
Thanx in advance.

Answer 1

First things first...i definitely recommend you take out the db stuff out of the jsp page. Place the logic in a DAO and if you have to reference the dao in the jsp. Although in a practice you should have a service layer which does the db stuff. Use a servlet to call the service layer and pass the results of the service layer to the jsp.
Writing java code like that in the jsp is just bad programming. There are loads of web frameworks that enable you to develop scalable web applications.
I realise that this does not help you but it is a good idea to get the design correct before embarking on the development.