userexit.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 com.db.DBAccess;

public class UserExit
    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();
    //用户退出Session清空
    HttpSession session = request.getSession();

    try
    {
      String name = (String)session.getAttribute("username");
      DBAccess db = new DBAccess();
      System.out.println(name);
      db.setStateTo(name);
      session.invalidate();
      out.print("<script language='javascript'>");
      out.print("parent.location='index.jsp';");
      out.print("</script>");

    }
    catch(Exception ex)
    {
      ex.printStackTrace();
      request.setAttribute("message",ex);
      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() {
  }
}