使用jsp+servlet+javabean 制作的简易BBS论坛

package action; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.*; import dao.*; import bean.*; import java.sql.Date; import java.sql.Timestamp; import java.util.*; import java.text.ParseException; import java.text.SimpleDateFormat; public class MainServlet extends HttpServlet { PageBean pb = null;// 此为分页类 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String oper = request.getParameter("oper");// 连接分发唯一标示 if ("login".equals(oper)) {// 用户登陆 this.login(pb, request, response); return; } if ("register".equals(oper)) {// 新用户注册 this.register(request, response); return; } if ("start".equals(oper)) {// 进入BBS页面 pb = this.start(pb, request, response); return; } if ("addbbs".equals(oper)) {// 添加BBS this.addbbs(request, response); return; } if ("message".equals(oper)) {// 分页 String ye = request.getParameter("command"); pb = this.message(pb, ye, request, response, "right.jsp"); return; } if ("view".equals(oper)) {// 更新左侧BBS标题 String bid = request.getParameter("bid"); pb = this.view(pb, bid, request, response); return; } if ("addmsg".equals(oper)) {// 帖子回复 pb = this.addmsg(pb, request, response); return; } if ("goedit".equals(oper)) {// 跳转到编辑之前的业务处理 this.goedit(request, response); return; } if ("edit".equals(oper)) {// 编辑帖子 pb = this.edit(pb, request, response); return; } if ("dele".equals(oper)) {// 删除帖子 pb = this.dele(pb, request, response); return; } if ("refresh".equals(oper)) {// 刷新 this.login(pb, request, response); return; } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } // 用户登陆 private void login(PageBean pb, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); String name = request.getParameter("uname"); String pass = request.getParameter("upass"); String checkcode = request.getParameter("checkcode"); String rand = (String) session.getAttribute("rand"); ConDB db = new ConDB(); int grade = db.testUser(name, pass); if (checkcode.equals(rand)) { if (grade == 1 || grade == 0) { List tlist = db.view(); session.setAttribute("tlist", tlist); List ulist=db.showuser(); session.setAttribute("user",ulist); response.sendRedirect("main.html"); } else { // !!!!!!!!!!!登陆错误!!!!!!!!!!!! this.error(request, response, "无此用户或者密码错误", "./index.jsp"); } } else { this.error(request, response, "验证码错误", "./index.jsp"); } db.close(); } // 新用户注册 private void register(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 得到客户端页面录入信息 HttpSession session = request.getSession(); PrintWriter out = response.getWriter(); String uname = request.getParameter("uname").trim(); String upass = request.getParameter("upass").trim(); String checkcode = request.getParameter("checkcode"); int grade=0; int grade1=1; String phone=request.getParameter("phone").trim(); String idcard=request.getParameter("idcard").trim(); String rand = (String) session.getAttribute("rand"); ConDB judge = new ConDB(); ConDB add = new ConDB(); // 获得新用户的注册信息 boolean beo= (phone.length() > 0) && (idcard.length() > 0); boolean boo = (uname.length() > 0) && (upass.length() > 0); if (checkcode.equals(rand)) { if(beo==true) if (judge.judge(uname) && boo == true) { add.add(uname, upass, grade,phone,idcard,0); request.getRequestDispatcher("/succeed.jsp").forward(request, response); } else { this.error(request, response, "用户名重复--无法使用", "./register.jsp"); } else { if (judge.judge(uname) && boo == true) { add.add(uname, upass, grade1,null,null,0); request.getRequestDispatcher("/succeed.jsp").forward(request, response); } else { this.error(request, response, "用户名重复--无法使用", "./register.jsp"); } } } else { this.error(request, response, "验证码错误", "./register.jsp"); } } // 进入BBS页面 private PageBean start(PageBean pb, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ConDB db = new ConDB(); List tlist = db.view(); db.close(); HttpSession session = request.getSession(); session.setAttribute("tlist", tlist); if (tlist.size() == 0 || tlist == null) { pb = new PageBean(4, ""); } else { pb = new PageBean(4, "where bid=" + ((Bbs) tlist.get(0)).getBid()); } pb = this.message(pb, "frist", request, response, "right.jsp"); return pb; } // 添加bbs private void addbbs(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); // ------------业务操作对象的创建------------ User user = (User) session.getAttribute("user"); String title = request.getParameter("title"); String bdetail = request.getParameter("bdetail"); String author = ((User) request.getSession().getAttribute("user")) .getUname(); int uid=((User) request.getSession().getAttribute("user")) .getUid(); Timestamp bdate = new Timestamp(new java.util.Date().getTime()); String jinghua=request.getParameter("jinghua"); Bbs bbs = new Bbs(0, title, author, bdate,jinghua); Bdetail detail = new Bdetail(0, 0, bdetail, user.getUname(), bdate); // --------------------------------------- ConDB db = new ConDB(); if (db.addMessge(bbs, detail)) { session.setAttribute("tlist", db.view()); response.sendRedirect("right.jsp"); } else { // !!!!!!!!!!!!发帖错误!!!!!!!!!!! this.error(request, response, "系统错误--发帖发生错误", "./right.jsp"); } db.close(); } // 分页 private PageBean message(PageBean pb, String fenye, HttpServletRequest request, HttpServletResponse response, String path) throws ServletException, IOException { HttpSession session = request.getSession(); // ------------------分页业务处理------------------- int num = pb.getNum(); int ye = pb.getYe(); int yeshu = pb.getYeShu(); Message mess = null; if ("frist".equals(fenye)) { List list = this.isBoos(pb, session); mess = new Message(num, ye, yeshu, list, pb.isBool()); } else if ("next".equals(fenye)) { mess = new Message(num, ye, yeshu, pb.xiaYiYe(), pb.isBool()); } else if ("back".equals(fenye)) { mess = new Message(num, ye, yeshu, pb.shangYiYe(), pb.isBool()); } else if ("last".equals(fenye)) { mess = new Message(num, ye, yeshu, pb.weiYe(), pb.isBool()); } // ----------分楼层---------- mess.setStart(pb.getStart() + 1); // ------------------------------------------------ session.setAttribute("messages", mess); System.out.print("grade"); response.sendRedirect(path); return pb; } // 分页转换bbs private PageBean view(PageBean pb, String id, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); pb = new PageBean(4, "where bid=" + id); pb = this.message(pb, "frist", request, response, "right.jsp"); return pb; } // 回帖 private PageBean addmsg(PageBean pb, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // ------------业务操作对象的创建-- ---------- String bid = request.getParameter("bid"); String resp = reque