急求：请教关于JSP首页 取数据并显示的问题
设计相关的3个文件包括index.jsp，IndexServlet.java，web.xml
想做到进首先就会显示数据的页面
各位大侠可有招实现
web。xml配置如下
<servlet> <servlet-name>IndexServlet</servlet-name> <servlet-class>com.lovo.cq.shopping10_1.servlet.IndexServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>IndexServlet</servlet-name> <url-pattern>/index</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list>
package com.lovo.cq.shopping10_1.servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.lovo.cq.shopping10_1.model.Model;import com.lovo.cq.shopping10_1.po.Book;public class IndexServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Model model = new Model(); List hostList0 = model.showBooks(1, 1); List newList0 = model.showBooks(2, 1); List saleList0 = model.showBooks(3, 1); List specialList0=model.showBooks(4, 1); Book book11 = (Book) hostList0.get(0); Book book12 = (Book) hostList0.get(1); Book book2 = (Book) newList0.get(0); Book book3 = (Book) specialList0.get(0); List<Book> hostList = new ArrayList<Book>(); hostList.add(book11); hostList.add(book12); List<Book> newList = new ArrayList<Book>(); newList.add(book2); List<Book> specialList = new ArrayList<Book>(); specialList.add(book3); List<Book> saleList = new ArrayList<Book>(); for(int i=0;i<3;i++){ Book book = (Book) saleList0.get(i); saleList.add(book); } List informList = model.getAllInform(); System.out.println(informList.size()); request.getSession().setAttribute("informList", informList); request.getSession().setAttribute("hostList", hostList); request.getSession().setAttribute("newList", newList); request.getSession().setAttribute("saleList", saleList); request.getSession().setAttribute("specialList", specialList); response.sendRedirect("index.jsp");// request.getRequestDispatcher("index.jsp").forward(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); }}