shoppingservlet.java

是JSP、Servlet的一个示例程序

/*
 * Created on 2005-3-9
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package test;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author yangbing
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
public class ShoppingServlet extends HttpServlet {

    protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        System.out.println("=========");
        if (req.getParameter("action") != null) {
            if (req.getParameter("action").equals("Submit")) {
                String goods = req.getParameter("goods");
                if (goods != null) {
                    Cart cart = new Cart();
                    if (goods.equals("cd")) {
                        cart.setGoodsName("CD");
                    } else if (goods.equals("egg")) {
                        cart.setGoodsName("Egg");
                    } else {
                        cart.setGoodsName("Tomato");
                    }
                    req.setAttribute("cart", cart);
                }
                req.getRequestDispatcher("insertNumber.jsp").forward(req, res);
            } else if (req.getParameter("action").equals("Pay")) {
                String number = req.getParameter("number");
                int num = 0;
                try {
                    num = Integer.parseInt(number);
                } catch (Exception e) {
                    req.getRequestDispatcher("insertNumber.jsp").forward(req, res);
                }
                Cart cart = new Cart();
                cart.setGoodsName(req.getParameter("goods"));
                cart.setGoodsNumber(num);
                req.setAttribute("cart", cart);
                req.getRequestDispatcher("shoppingresult.jsp").forward(req, res);
            }
        } else {
            PrintWriter out = res.getWriter();
            out.println("Sorry, some exception occured in Server!!!");
            out.close();

        }
    }
}