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   源码介绍

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在前端选择要买的宠物，然后提交付款

package myservlet;

import java.io.IOException;
import java.util.List;
import business.*;
import bean.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet implementation class Categoryservlet
 */
public class Categoryservlet extends HttpServlet {
private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Categoryservlet() {
        super();
        // TODO Auto-generated constructor stub
    }

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String catID=request.getParameter("catid");
HttpSession session = request.getSession();
PetStore ps=(PetStore)session.getAttribute("petstore");
if(ps==null)
ps=new PetStoreImpl();
session.setAttribute("petstore", ps);

try {
Category category=(Category)ps.getCategory(catID);

List<Product> products=ps.getProductListbyCategory(catID);
request.setAttribute("category", category);
request.setAttribute("products", products);
//转发
request.getRequestDispatcher("Category.jsp").forward(request, response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}

}