<form action="product-save.action" method="post">

ProductName:<input type="text" name="productName"/><br>

productDesc:<input type="text" name="productDesc"/><br>

productPrice:<input type="text" name="productPrice"/><br>

<input type="submit" name="submit" value="submit">

</form>

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        // TODO Auto-generated method stub

        // place your code here

        HttpServletRequest req=(HttpServletRequest) request;

        String servletPath = req.getServletPath();

        System.out.println(servletPath);

        String path = null;

        if("/product-input.action".equals(servletPath)){

            path="/WEB-INF/pages/input.jsp";

        }

        if("/product-save.action".equals(servletPath)){

            String productName = request.getParameter("productName");

            String productDesc = request.getParameter("productDesc");

            String productPrice = request.getParameter("productPrice");

            Product product = new Product(null, productName, productDesc, productPrice);

            product.setProductId(1001);

            System.out.println(product);

            request.setAttribute("product", product);

            path = "/WEB-INF/pages/details.jsp";

        }

        if(path!=null){

            request.getRequestDispatcher(path).forward(request, response);

            return;

        }

        // pass the request along the filter chain

        chain.doFilter(request, response);

    }

filterDispatcher