addcompareaction.java

电子商务网站使用MVC模式B/S结构功能不是很全适合初学者看

package Common;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import Common.DBConnectBean;

public class addCompareAction extends HttpServlet{
	public void doGet(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException{
		ServletContext application=getServletConfig().getServletContext(); 
		request.setCharacterEncoding("gb2312");
		HttpSession session=request.getSession();
		
		ArrayList compareList=new ArrayList();
		ArrayList compareListCopy=new ArrayList();
		Hashtable commodity=new Hashtable();
		String[] commodityID=request.getParameterValues("id");
		if (commodityID==null) System.out.print("   wakao zmshehihih");
		if(commodityID!=null){
			DBConnectBean dbBean=new DBConnectBean("sun.jdbc.odbc.JdbcOdbcDriver","jdbc:odbc:shopping","","");
			
			if(session.getAttribute("compareList".toUpperCase())!=null){
				//获取现在客户的购物车里的所有商品的信息及数量
				compareList=compareListCopy=(ArrayList)session.getAttribute("compareList".toUpperCase());
			}
			for (int i=0;i<commodityID.length;i++){
				int j=0;
				System.out.println("the client now has buy ");
				//如果客户已经买了该商品，则添加商品数量
				if(compareListCopy!=null){
				//	System.out.println("不空不空");
					for(;j<compareListCopy.size();j++){
						Hashtable tb=(Hashtable)compareListCopy.get(j);
						String id=tb.get("id".toUpperCase()).toString();
					//	System.out.print("------finding   "+id+commodityID[i]);
						if(id.equals(commodityID[i])){
							System.out.println("found  ");
							commodity=tb;
							compareList.remove(j);
							int commodityNum=Integer.parseInt(tb.get("commodityNum".toUpperCase()).toString())+1;
							commodity.put("commodityNum".toUpperCase(),commodityNum);
							compareList.add(j,commodity);
						//	System.out.println("find one has bought");	
							break;
						}
					}
				}else {
					System.out.println("这里是空的");
				}
				//如果可户还未买该商品，则添加新商品
				if(compareListCopy==null||j==compareListCopy.size()){
					Hashtable tmptable=new Hashtable();
					System.out.println("put this commodity   "+commodityID[i]);
					tmptable=dbBean.getOneRecord("select * from commodity where id="+commodityID[i]);
					commodity=new Hashtable();
					commodity.put("id".toUpperCase(),commodityID[i]);
					commodity.put("card".toUpperCase(),tmptable.get("card".toUpperCase()));
					commodity.put("num".toUpperCase(),tmptable.get("num".toUpperCase()));
					commodity.put("model".toUpperCase(),tmptable.get("model".toUpperCase()));
					commodity.put("photo".toUpperCase(),tmptable.get("photo".toUpperCase()));
					commodity.put("special".toUpperCase(),tmptable.get("special".toUpperCase()));
					commodity.put("net".toUpperCase(),tmptable.get("net".toUpperCase()));
					commodity.put("describe".toUpperCase(),tmptable.get("describe".toUpperCase()));
					commodity.put("price".toUpperCase(),tmptable.get("price".toUpperCase()));
					commodity.put("picture".toUpperCase(),tmptable.get("picture".toUpperCase()));
					commodity.put("commodityNum".toUpperCase(),1);
					compareList.add(commodity);	
				}
			}
		//	System.out.println("武打无扎");
			session.setAttribute("compareList".toUpperCase(),compareList);
		}
		application.getRequestDispatcher("/client/clientList.jsp?done=true").forward(request,response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException{
	   	doGet(request,response);
	}
}