📄 mycart.java
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/*
* myCart.java
*
* Created on 2007年11月22日, 下午4:20
*/
package cart;
import java.io.*;
import java.net.*;
import dbpack.dbConnect;
import java.sql.SQLException;
import javax.servlet.*;
import javax.servlet.http.*;
/**
*
* @author weiyunbo
* @version
*/
public class myCart extends HttpServlet {
/** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
/* TODO output your page here
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet myCart</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet myCart at " + request.getContextPath () + "</h1>");
out.println("</body>");
out.println("</html>");
*/
cartInfo cti=new cartInfo();
String foodid="";
String foodprice="";
String foodnum="";
String foodname="";
HttpSession session=request.getSession(true);
java.util.Vector vector=(java.util.Vector)session.getAttribute("cartVector");
if(vector==null){
vector=new java.util.Vector();
}
foodid=request.getParameter("id");
dbConnect db=new dbConnect();
try {
db.rs=db.sat.executeQuery("select * from food where foodid="+foodid);
while(db.rs.next()){
foodprice=db.rs.getString("foodprice");
foodname=db.rs.getString("foodname");
foodnum="1";
}
db.doClose();
int i=0;
boolean b=true;
for(i=0;i<vector.size();i++){
cartInfo cat=(cartInfo)vector.get(i);
if(cat.getFoodid().equals(foodid)){
if(cat.getFoodnum()==null){
cat.setFoodnum("1");
}
int m=Integer.parseInt(cat.getFoodnum())+1;
cat.setFoodnum(new Integer(m).toString());
vector.remove(cat);
vector.add(cat);
session.setAttribute("cartVector",vector);
b=false;
}
}
if(b){
cti.setFoodid(foodid);
cti.setFoodname(foodname);
cti.setFoodnum(foodnum);
cti.setFoodprice(foodprice);
vector.add(cti);
session.setAttribute("cartVector",vector);
}
response.sendRedirect("mycart.jsp");
} catch (SQLException ex) {
ex.printStackTrace();
}
out.close();
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/** Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/** Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/** Returns a short description of the servlet.
*/
public String getServletInfo() {
return "Short description";
}
// </editor-fold>
}
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