findtopic.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.TopicDB;

public class FindTopic
    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();
    //设置字符集
    request.setCharacterEncoding("GB2312");
    //分页和查找相关帖子
    String tname = request.getParameter("tname");
    String cpage = request.getParameter("cpage");
    int ccpp;
    if (cpage == null || cpage.equals("")) {
      cpage = "1";
    }

    try {
      ccpp = Integer.parseInt(cpage);
      TopicDB db = new TopicDB();
      db.setRows(20);
      ArrayList data = db.findtopic(ccpp,tname);
      int pageCount = db.getPageCount();
      int rows = db.getRows();
      request.setAttribute("topicdata", data);
      request.setAttribute("cpage", ccpp + "");
      request.setAttribute("row", rows + "");
      request.setAttribute("pages", pageCount + "");
      request.getRequestDispatcher("topicbyfind.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() {
  }
}