displayservlet.java

通过jsp,servlet,javaBean,三成架构实现的好友通讯录系统

package com.servelet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.Dao.bookDao;
import com.entity.*;

public class DisplayServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
       doPost(request, response);

    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
         response.setContentType(CONTENT_TYPE);
         ArrayList list=findBooks(request);
         request.setAttribute("books",list);
         request.getRequestDispatcher("displayBook.jsp").forward(request,response);
    }

    public ArrayList findBooks(HttpServletRequest request)
    {
       HttpSession session=request.getSession();
       UserBean user=(UserBean)session.getAttribute("user");
       bookDao bookdao=new bookDao();
       ArrayList list=bookdao.findBookByUserId(user.getUserId());
       return list;
    }




    //Clean up resources
    public void destroy() {
    }
}