405 error when created a servlet for Recalculate form button

Question

hello, if anyone can help me out. I'm doing a school project that is a (Apache Tomcat Server) website that allows customers to buy music cds.(no it does not really go to a Service) i am having trouble with the recalculate form button. I have a form button created in a page called CartDetails.java and i use outstring to convert these lines <form method='POST' name='recalc' action='Recalculate'> and <input type='Submit' name='recalc' value='Recalculate'> into html code so tomcat will see it as html and not java. I have also made a doGet method inside another page called Recalculate.java to request the data i need from the database. this is part of the code(in Recalculate.java).
protected void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
HttpSession session = request.getSession();
Music.Customer custbean = (Music.Customer)session.getAttribute("customer");
yes, I have done all the calculations.(my teacher gave them to me). I have also created the servlet in the web.xml file properly. the problem is that it gives me a 405 error saying HTTP method POST is not supported by this URL when the recalculate form button is pressed.
please help. thanx

Answer 1

I did change it to doPost and it gave me the same error message. my teacher told me to put in a doPost method right underneath the doGet method(the doPost would do exactly what the doGet does in my program). but that would mean i would have to open two sessions. this is my whole program. i am almost positive the problem is here. Everything else is done right. /*
This servlet recalculates the total of the cart. those items which quantities are 0 will be deleted from the
cartdetails table. This version calls on CartDetails servlet to finish the job. Commented segments below were in
RecalculateCart
package Music;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import Music.DBI;
import Music.Customer;
import Music.Control;
import java.text.NumberFormat;
public class Recalculate extends Music.Control {
String CustomerID;
protected DBI dbi; // i also used do Post here....same result.
protected void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
HttpSession session = request.getSession();
Music.Customer custbean = (Music.Customer)session.getAttribute("customer");
dbi = custbean.getDBI();
try {
java.util.Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements())
String paramName = (String)paramNames.nextElement();
this.dbi.printItem(paramName);
// String[] paramValue = request.getParameterValues(paramName);
/*ParamValue is the ID of the item */
String paramValue = request.getParameter(paramName);
this.dbi.printItem("Item = "+paramName+" Number of Items = "+paramValue);
int qty = Integer.parseInt(paramValue);
if (qty == 0)
/* delete record form cartdetail */
this.dbi.deleteItem(Integer.parseInt(custbean.getCartId()),Integer.parseInt(paramName));
else
/* update record with the paramValues as quantity */
this.dbi.updateItem(Integer.parseInt(custbean.getCartId()),Integer.parseInt(paramName),qty);
} // end while
catch(Exception e)
e.printStackTrace();
gotoPage("/CartDetails", request, response);
} // end do Post
} // end class