package com.gbsource.homepage.admin;import javax.servlet.http.HttpSession;import javax.servlet.http.HttpServletRequest;import java.sql.ResultSet;/** * Title:       華源網絡主頁基地管理 * Description: * Copyright:    Copyright (c) 2001 * Company:      Gbsource Studio * @author fishwu * @version 1.0 */public class Signup {  private static BeansConstants CONST;  private static String userid = null;  private static String password = null;  public static int checklogin(HttpServletRequest request)  {    int value;    HttpSession session = request.getSession(false);    userid = request.getParameter(CONST.Userid);    password = request.getParameter(CONST.Passwd);    if(userid == null || "".equals(userid)) return CONST.USERID_NULL_ERR;    if(password == null || "".equals(userid)) return CONST.PASSWORD_NULL_ERR;    String sql = "select * from admin where userid = ?";    try{      Database db = new Database(sql);      db.setString(1,userid);      ResultSet rs = db.executeQuery();      if(rs.next())      {        if(rs.getString("password").equalsIgnoreCase(password))        {          session.setAttribute(CONST.SUserid,userid);          value = CONST.RUN_OK;        }        else        {          value = CONST.PASSWORD_ERR;        }      }      else      {        value = CONST.USERID_ERR;      }      rs.close();      rs = null;      db.close();      db = null;    }catch(Exception e){      value = CONST.DB_ERR;    }    sql = null;    return value;  }}