customerservlet.java

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/*
 * CustomerServlet.java
 *
 * Created on 2006年5月17日, 上午10:36
 */

package Servlet;

import Bean.CartBean;
import DAO.DataBaseBean;
import java.io.*;
import java.net.*;

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import Common.*;
import java.io.UnsupportedEncodingException;

/**
 *
 * @author boyingking
 * @version
 */
public class CustomerServlet extends HttpServlet { 
    private StringManager smg=new StringManager();//注意放到外面声明
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=gb2312");
        request.setCharacterEncoding("gb2312");
        HttpSession session=request.getSession(true);
        String action=request.getParameter("action").trim();//获取action属性的值
        String [] selectedCount=request.getParameterValues("choose");//获取用户选择的复选框的值
        DataBaseBean dbBean=new DataBaseBean();
        Vector vec=new Vector();
        if(action.equals("select")){//处理用户按下“查询”按钮的请求
            String productName=smg.backCode(request.getParameter("productName"));
            String searchType=request.getParameter("searchType");
            if(productName==null|| productName.equals("")){//输入的查询关键字为空
                session.setAttribute("namenull","namenull");
                vec=dbBean.selectProduct("select * from product");
            }else if(searchType.equals("jingque")){//查询方式为“精确查询”
                vec=dbBean.selectProduct("select * from product where product_name like '"+productName+"'");
            } else if(searchType.equals("mohu")){//查询方式为“模糊查询”
                vec=dbBean.selectProduct("select * from product where product_name like '%"+productName+"%'");
            }
            session.setAttribute("result",vec);
            this.forward(request,response,"searchview.jsp");
        }else if(action.equals("getall")){//处理用户点击“查看所有商品”链接的请求
            vec=dbBean.selectProduct("select * from product");
            session.setAttribute("result",vec);
            this.forward(request,response,"searchview.jsp");
        }else if(action.equals("next")){//处理用户点击“下一页”链接的请求
            String pageno=request.getParameter("pageno");
            this.forward(request,response,"searchview.jsp?pageno="+pageno);
        }else if(action.equals("previous")){//处理用户点击“上一页”链接的请求
            String pageno=request.getParameter("pageno");
            this.forward(request,response,"searchview.jsp?pageno="+pageno);
        }else if(action.equals("addtocart")){//处理用户按下“添加到购物车”按钮的请求
            if(selectedCount!=null){
                CartBean cartbean=null;
                Vector tempvec=(Vector)session.getAttribute("result");
                if(session.getAttribute("cart")==null){
                    cartbean=new CartBean();
                }else{
                    cartbean=(CartBean)session.getAttribute("cart");
                }
                for(int i=0;i<selectedCount.length;i++){
                    cartbean.addToCart(tempvec,selectedCount[i]);
                }
                session.setAttribute("cart",cartbean);
            }
            this.forward(request,response,"cartview.jsp");
        }else if(action.equals("delete")){//处理用户按下“删除选中商品”按钮的请求
            if(selectedCount!=null){
                CartBean cartbean=(CartBean)session.getAttribute("cart");
                for(int i=0;i<selectedCount.length;i++){
                    cartbean.deleteFromCart(selectedCount[i]);
                }
                session.setAttribute("cart",cartbean);
            }
            this.forward(request,response,"cartview.jsp");
        }else if(action.equals("gotocheckout")){//处理用户点击“去结算中心”链接的请求
            this.forward(request,response,"checkout.jsp");
        }else if(action.equals("checkout")){//处理用户按下“结算”按钮的请求
            CartBean cartbean=(CartBean)session.getAttribute("cart");
            dbBean.checkOut(cartbean);
            session.setAttribute("cart",null);
            session.setAttribute("check","ok");
            this.forward(request,response,"checkout.jsp");
        }
    }
    
    // <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>
    private void forward(HttpServletRequest request,HttpServletResponse response,String url) throws ServletException,IOException {
        RequestDispatcher dispatcher = request.getRequestDispatcher(url);
        dispatcher.forward(request, response);
    }
}