<%//创建商品业务逻辑对象productBiz prodctbiz = new productBizImpl();List<easybuy_product> productlist = prodctbiz.findproductList();request.setAttribute("productlist",product);
%>//EL表达式

核心架包<%@taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c"%>//EL表达式：
<c:forEach var="news" items="${requestScope.productlist}" ><li class="ck"><dl><dt><a href="addcookie?id=${news.ep_id}"><img src="${news.ep_file_name}" /></a></dt><dd class="title"><a href="addcookie?id=${news.ep_id}">${news.ep_name}</a></dd><dd class="price">￥${news.ep_price}.00</dd></dl></li></c:forEach>

        <!--商品id存在cookies--><servlet><servlet-name>addcookie</servlet-name><servlet-class>Servlet.addcookie</servlet-class></servlet><!-- 映射servlet --><servlet-mapping><servlet-name>addcookie</servlet-name><url-pattern>/addcookie</url-pattern></servlet-mapping>

package Servlet;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class addcookie extends HttpServlet {/*** Constructor of the object.*/public addcookie() {super();}/*** Destruction of the servlet. <br>*/public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here
    }public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");PrintWriter out = response.getWriter();request.setCharacterEncoding("utf-8");//获取商品idString id = request.getParameter("id");//转发的页面response.setHeader("refresh", "0;url=/yimaiWang/product-view.jsp?id="+id);Cookie[] cookies = request.getCookies();String visitlist = null;if (cookies != null) { for (Cookie cookie : cookies) {if (cookie.getName().equals("visitlist")) {visitlist = cookie.getValue();break;}}if (visitlist == null) {Cookie cookie = new Cookie("visitlist", id);cookie.setMaxAge(180);response.addCookie(cookie);} else {String[] existIds = visitlist.split(",");for (String exsitId : existIds) {if (exsitId.equals(id)) {return;}}Cookie cookie = new Cookie("visitlist", visitlist + "," + id);cookie.setMaxAge(180);response.addCookie(cookie);}} else {Cookie cookie = new Cookie("visitlist", id);cookie.setMaxAge(180);response.addCookie(cookie);}}}

public easybuy_product findProductForid(int id) {con=this.getConnection();int i =id;String sql = "select * from easybuy_product where ep_id =?";easybuy_product pd = new easybuy_product();try {st=con.prepareStatement(sql);st.setInt(1,id);rs=st.executeQuery();    while(rs.next()){pd.setEp_id(rs.getInt(1));pd.setEp_name(rs.getString(2));pd.setEp_description(rs.getString(3));pd.setEp_price(rs.getInt(4));pd.setEp_stock(rs.getInt(5));pd.setEpc_id(rs.getInt(6));pd.setEpc_child_id(rs.getInt(7));pd.setEp_file_name(rs.getString(8));}} catch (SQLException e) {// TODO Auto-generated catch block
        e.printStackTrace();return null;}finally{this.ShiFang(rs, st, con);}return pd;
}
}

public List<easybuy_product> product(String id) {List<easybuy_product> listproduct=new ArrayList<easybuy_product>();// TODO Auto-generated method stub
con = this.getConnection();String sql="select * from easybuy_product where ep_id=?";try {st=con.prepareStatement(sql);st.setString(1,id);rs=st.executeQuery();while(rs.next()){easybuy_product product = new easybuy_product();product.setEp_id(rs.getInt(1));product.setEp_name(rs.getString(2));product.setEp_description(rs.getString(3));product.setEp_price(rs.getInt(4));product.setEp_stock(rs.getInt(5));product.setEpc_id(rs.getInt(6));product.setEpc_child_id(rs.getInt(7));product.setEp_file_name(rs.getString(8));listproduct.add(product);}} catch (SQLException e) {// TODO Auto-generated catch block
        e.printStackTrace();this.ShiFang(rs, st, con);}return listproduct;
}

<%
//获取商品id
int id = Integer.parseInt(request.getParameter("id"));
productBiz bizvoid = new productBizImpl();
easybuy_product shop = bizvoid.findProductForid(id);
request.setAttribute("shop",shop);
%>

<% //获取商品id
request.setCharacterEncoding("utf-8");
String a = request.getParameter("id");
%><%//创建商品信息业务逻辑对象productBiz productbiz = new productBizImpl();List<easybuy_product> list =productbiz.product(a);request.setAttribute("list",list);%><div id="product" class="main"><c:forEach var="product" items="${requestScope.list}" ><h1><%=shop.getEp_name() %></h1></c:forEach><div class="infos"><c:forEach var="product" items="${requestScope.list}" ><div class="thumb"><img src="${product.ep_file_name}" width="300px" /></div><div class="buy"><p>商品描述：<span class="price">${product.ep_description}</span></p><p>商城价：<span class="price">￥${product.ep_price}.00</span></p><c:if test="${product.ep_stock==null}"> <p class="w1 c">缺货</p></c:if><c:if test="${product.ep_stock!=null}"> <p class="w1 c">有货</p></c:if><c:if test="${name==null}"> <script type="text/javascript">function ck(){alert("你未登入，请去登入吧！");return false;}</script></c:if>