viewtopic.java

功能描述 1） 后台：管理员负责对整个论坛进行管理

package bbs.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import bbs.db.ReplayDB;
import bbs.bean.BbsReply;

public class ViewTopic
    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 {
    response.setContentType(CONTENT_TYPE);
    PrintWriter out = response.getWriter();
    //查询单个帖子的所有信息
    String tid = request.getParameter("tid");
    String cpage = request.getParameter("cpage");
    int ccpp;
    if (cpage == null || cpage.equals("")) {
      cpage = "1";
    }
    try {
      ccpp = Integer.parseInt(cpage);
      ReplayDB db = new ReplayDB();
      db.setRows(10);
      ArrayList data = db.select(Integer.parseInt(tid), ccpp);
      request.setAttribute("data", data);
      request.setAttribute("cpage", ccpp + "");
      int rows = db.getRows();
      int pageCount = db.getPageCount();
      request.setAttribute("row", rows + "");
      request.setAttribute("pages", pageCount + "");

      request.getRequestDispatcher("showtopic.jsp").forward(request, response);
    }
    catch (Exception ex) {
      ex.printStackTrace();
      request.setAttribute("message", "数据库操作发生错误！");
      request.getRequestDispatcher("error.jsp").forward(request, response);
    }

    out.close();
  }

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

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