JSP大作业：实现论坛设计

package servlet; import java.io.IOException; import java.io.PrintWriter; import java.sql.SQLException; import java.util.List; import javax.naming.NamingException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import bean.reply; import bean.topics; import dao.replydao; import dao.topicdao; public class Reply extends HttpServlet { /** * Constructor of the object. */ public Reply() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); request.setAttribute("isview", "l"); int pages=1; int toPage = 1; int pageSize = 6;//页面大小 int replyNum=0; int postID; if(request.getAttribute("postID")!=null) postID=Integer.parseInt(request.getAttribute("postID").toString()); else { postID=Integer.parseInt(request.getParameter("postID")); } topics tp; try { tp = topicdao.gettopics(postID); request.setAttribute("tp", tp); } catch (SQLException | NamingException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } //设置页面总数 if(request.getParameter("sum")==null){ try { pages = replydao.getCount(postID); } catch (SQLException | NamingException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(pages==0) { pages=1; } if(pages%pageSize==0) pages = pages/pageSize; else pages = pages/pageSize+1; } else pages = Integer.valueOf(request.getParameter("sum").toString()); //获取要到的页面 if(request.getParameter("topage")!=null) toPage = Integer.valueOf(request.getParameter("topage").toString()); if(toPage<1) { toPage=1; } if(toPage>pages) { toPage=pages; } //获取页面的内容 try { List<reply> list = replydao.getreply(pageSize, toPage, postID); topicdao.updatebrowse(postID); request.setAttribute("list", list); } catch (NamingException | SQLException e) { e.printStackTrace(); } request.setAttribute("topage", toPage); request.setAttribute("pages", pages); request.getRequestDispatcher("/reply.jsp").forward(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }