modifytopic.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;
import bbs.bean.BbsTopic;

public class ModifyTopic
    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();
    //获得帖子的ID，用户名，权限
    String tid = request.getParameter("tid");
    String index = request.getParameter("id");
    String name = request.getParameter("username");
    String pepedom = request.getParameter("pepedom");
    String message = null;

    try{
      TopicDB db = new TopicDB();
      //判断帖子是否删除成功
      if(Integer.parseInt(index)==2){
        if (db.delete(tid) > 0) {
          message = "贴子删除成功！";
          if(Integer.parseInt(pepedom) == 1){
            db.modifypoint(name);
          }
        }
        else {
          message = "贴子删除失败！";
        }
        request.getRequestDispatcher("usertopic?message=" + message + "&username="+name+"").
            forward(request, response);
        return;
      }
      else{
        BbsTopic topic = db.selectTopic(tid);
        request.setAttribute("topic",topic);
        request.setAttribute("tid",tid);
        request.getRequestDispatcher("modifytopic.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() {
  }
}