/*******************************************************************\*                                                                   **			   LightningBoard			    **                                                                   **          http://sourceforge.net/projects/lightningboard/          **			                                            **	            Copyright (c) 2002 Xiaobo Liu	            **                                                                   ***********************************************************************                        LICENSE INFORMATION                        **                                                                   **  LightningBoard is free software; you can redistribute it and/or  **  modify it under the terms of the GNU General Public License as   **  published by the Free Software Foundation; either version 2 of   **  the License, or any later version.                               **                                                                   **  We don't charge anything for the use of LightningBoard, we only  **  require you to keep the copyright present on your site and in    **  the source files.                                                **                                                                   **  LightningBoard is distributed in the hope that it will be useful,**  but without any warranty; without even the implied warranty of   **  merchantability or fitness for a particular purpose. See the GNU **  General Public License for more details.                         **                                                                   *\*******************************************************************/package liuxiaobo.lb.action;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import liuxiaobo.util.*;import liuxiaobo.lb.*;import liuxiaobo.lb.dao.*;import liuxiaobo.lb.bean.*;public class LoginAction  {  public String excute(HttpServletRequest request, HttpServletResponse response)      throws IOException, ServletException,ActionException{      String u_name=request.getParameter("u_name");      u_name=StringUtil.escapeSQLTags(u_name);      u_name=StringUtil.escapeHTMLTags(u_name);      String u_password=request.getParameter("u_password");      u_password=StringUtil.escapeSQLTags(u_password);      u_password=StringUtil.escapeHTMLTags(u_password);     if (StringUtil.nullOrBlank(u_name)||StringUtil.nullOrBlank(u_password)){        request.setAttribute("actionMessage",new ActionMessage("blank_error"));        return "/actionMessage.jsp";      }      LoginDAO loginDAO=new LoginDAO();      LoginBean loginBean=loginDAO.execute(u_name);      if (loginBean!=null&&u_password.equals(loginBean.getU_password())){        HttpSession sess = request.getSession();        sess.setAttribute("loginBean",loginBean);        String u_id=loginBean.getU_id();        response.sendRedirect("user.do?u_id="+u_id);        return null;      }else{        request.setAttribute("actionMessage",new ActionMessage("login_error"));        return "/actionMessage.jsp";      }  }}