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           The steps required to implement serverside java on your Arachno Net hosting account

  • 1/ Some basic information: Our JDK is version 1.4
  • We use Tomcat 4 java server with which you can implement jsp, servlets and enterprise java beans.
  • a/ Tomcat 4.0 will implement the Servlet 2.3 and JSP 1.2 container specifications.Tomcat 4.0 also supports web applications built for the Servlet 2.2 and JSP 1.1 specifications with no changes.
  • b/ To have java enabled for your site, please email support@arachnonet.com and request that it be installed on your site, please provide your username and site url with the request.
  • c/ When it is installed a java directory structure will appear in your site root directory, the structure will be like this /java/WEB-INF/classes
  • d/ jsp files will go in the /java directory or subdirectories under it, and will be called with the url http://www.yourdomainname.com/java/filename.jsp, it is important to use the www in the URL format as www.yourdomainname.com is your sites context definition within the server.xml file, and therefore no other format will work
  • e/ Your web.xml files used to define your servlets go in the /java/WEB-INF directory
  • f/ Your servlets (class files will go in the /java/WEB-INF/classes directory and you can call the servlets using http://www.yourdomainname.com/java/servlet/servletname
  • 2/ Our JDBC mysql driver is mm.mysql if you wish to use JDBC follow these instructions
  • a/ In your control panel use the mysql manager to create your database and user then assign the user to the database.
  • Use the connection string given in the mysql manager with the addition of the connection port, please see the example below.
  • JDBC Connection C = DriverManager.getConnection( "jdbc:mysql://localhost:3306/database_name?user=something_user&password=xxxxxxxx");
  • You can use the sample code below to check your database connection This sample code was made available by thebeastunleashed.com


       // ---- configure this for your site

       // The URL that will connect to our MySQL server. Syntax: jdbc:TYPE:machine:port/DB_NAME


      String url = "jdbc:mysql://localhost:3306/database_name?user=xxx_xxx&password=yyyyy";

       // A canned query string

      String queryString = "SELECT the_column from your_table_name";


      // INSTALL/load the Driver (Vendor specific Code)

       try {


       } catch(java.lang.ClassNotFoundException e) {

         System.out.print("ClassNotFoundException: ");




       // Here's where we start the connection and then submit a request

       out.println ("<h1>Connecting to a mySQL database</h1><hr>");

       try {

          java.sql.Connection con;

          java.sql.Statement stmt;


       // Establish Connection to the database at URL with usename and password

           con = java.sql.DriverManager.getConnection(url);

           out.println ("<BR>Ok, connection to the DB worked.");

           out.println ("<BR>Let's see if we can retrieve something with: <STRONG>" + queryString + "</strong>");



      // Create a Statement Object

      stmt = con.createStatement();

      out.println ("<BR><br>Created statement ...");

      // Send the query and bind to the result set

        java.sql.ResultSet rs = stmt.executeQuery(queryString);

        out.println ("<BR><BR>Got result set .. it is " + (rs == null ? " NULL" : "not null") +  "<BR><br>");


        int counter =       0;

        while (rs.next()) {

             String s = rs.getString("cl_name");

             out.println("Column <strong>the_column</strong> for row " + (++counter) + " is " + s + "<BR>");


       // Close resources




       // print out decent error messages

        catch(java.sql.SQLException ex) {

        out.println("==> SQLException: ");

      while (ex != null) {

         out.println("Message:   " + ex.getMessage () +"<BR>");

         out.println("SQLState:  " + ex.getSQLState () + "<BR>");

         out.println("ErrorCode: " + ex.getErrorCode () + "<BR>");

         ex = ex.getNextException();



       } catch (Exception e1) {

             out.println ("Other exception - " + e1.getMessage ());




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