import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Vector;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.east.foodBean.CateBean;
import com.east.foodDao.CateDAO;
/***
* 购物车的显示转到showcart.jsp中去
* @author Administrator
*
*/
public class ShopCartServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");
PrintWriter out = response.getWriter();
HttpSession session = request.getSession();
Vector food = (Vector)session.getAttribute("voCart");
request.setAttribute("food", food);
request.getRequestDispatcher("shopCart.jsp").forward(request, response);
}
public CateBean exitstCateBean (int id,Vector voCate){
Iterator iter = voCate.iterator();
while (iter.hasNext()){
CateBean cateBean = (CateBean)(iter.next());
if (cateBean.getCardId() ==id){
return cateBean;
}
}
return null;
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
doGet(request,response);
}
}
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Vector;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.east.foodBean.CateBean;
import com.east.foodDao.CateDAO;
/***
* 购买食品的servlet
* @author Administrator
*
*/
public class BuyServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");
PrintWriter out = response.getWriter();
HttpSession session = request.getSession();
CateDAO cateDAO = new CateDAO();
int cateId = Integer.parseInt(request.getParameter("cateId"));
if (session.getAttribute("voCart") == null){
session.setAttribute("voCart", new Vector());
}
Vector voCart = (Vector)(session.getAttribute("voCart"));
CateBean bean = isExistence(voCart,cateId);
if (bean == null){
bean = cateDAO.selectAll(cateId);
bean.setCount(1);
voCart.add(bean);
}else{
bean.setCount(bean.getCount()+1);
}
//计算总价格
float allPrice = this.totalPrice(voCart);
session.setAttribute("voCart", voCart);
session.setAttribute("allPrice", allPrice);
out.println("成功加入购物车");
}
public CateBean isExistence(Vector voCart,int id){
Iterator it = voCart.iterator();
while(it.hasNext()){
CateBean item = (CateBean)(it.next());
if(item.getCardId() == id){
return item;
}
}
return null;
}
/**
* 计算总价格
* @param voCart
* @return
*/
public float totalPrice(Vector voCart){
Iterator it = voCart.iterator();
float price=0.0f;
while(it.hasNext()){
CateBean cateBean = (CateBean)it.next();
price = price + cateBean.getCurPrice() * cateBean.getCount();
}
System.out.println("总价格:"+price);
return price;
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
}