?? cartservlet.java
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/*
* Created on 2004-6-13
*
* To change the template for this generated file go to
* Window - Preferences - Java - Code Generation - Code and Comments
*/
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* @author haoyulong
*
* To change the template for this generated type comment go to
* Window - Preferences - Java - Code Generation - Code and Comments
*/
public class CartServlet extends HttpServlet {
protected void doPost(HttpServletRequest req,
HttpServletResponse res) throws ServletException, IOException {
//TODO Method stub generated by Lomboz
HttpSession session = req.getSession(true);
HashMap cart = (HashMap) session.getAttribute("cart");
if (cart == null) {
cart = new HashMap();
cart.put("apple","0");
cart.put("banana","0");
cart.put("grape","0");
session.setAttribute("cart", cart);
}
res.setContentType("text/html;charset=gb2312");
PrintWriter out = res.getWriter();
req.setCharacterEncoding("gb2312");
String apple_amount=req.getParameter("apple_amount");
String banana_amount=req.getParameter("banana_amount");
String grape_amount=req.getParameter("grape_amount");
String appleAmount=(String)cart.get("apple");
String bananaAmount=(String)cart.get("banana");
String grapeAmount=(String)cart.get("grape");
//int te=Integer.parseInt(appleAmount,10);
//int te1=Integer.getInteger(apple_amount).intValue();
int new_apple_amount =Integer.parseInt(appleAmount,10)+Integer.parseInt(apple_amount,10);
int new_banana_amount =Integer.parseInt(bananaAmount,10)+Integer.parseInt(banana_amount,10);
int new_grape_amount =Integer.parseInt(grapeAmount,10)+Integer.parseInt(grape_amount,10);
cart.put("apple",String.valueOf(new_apple_amount));
cart.put("banana",String.valueOf(new_banana_amount));
cart.put("grape",String.valueOf(new_grape_amount));
// Print Current Contents of Cart
out.println("<HTML><HEAD><TITLE>");
out.println("購物車內容");
out.println("</TITLE></HEAD>");
out.println("<BODY>");
out.println("<H1>你的購物車里有</H1>"+
new_apple_amount+"斤蘋果 "+new_banana_amount+"斤香蕉 "
+new_grape_amount+"斤葡萄");
out.println("<HR>");
out.print("<HR><p><A HREF=\"");
out.print(res.encodeURL("catalog"));
out.println("\">回到水果店</A></p>");
out.close();
}
}
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