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登陆：用户表-----（页面session增加，此session用上下文的request获取，传入工具类，设置）---session表------session历史表
退出：删除登录时增加的session表---页面session去除（在登陆时后台设置的session 中的当前用户，包括页面session，数据表中的session）
看别人的程序，看过程后，选择性的修订代码
sesion的工具类：

package ces.platform.system.common;

import javax.servlet.http.*;
import java.util.*;

/**
* 标题:
* 
* 《会话属性》类
* 
* 描述:
* 
* 会话绑定
* 
* 版本号:
* 
* Copyright (c) 2.50.2003.0925
* 
* 公司:
* 
* 上海中信信息发展有限公司
* 
* @author 王辉
* @version 2.50.2003.0925
*/

public class SessionProperty {

 HttpSession session=null;
 Hashtable table=new Hashtable();

 public SessionProperty() {
 }

 public SessionProperty(HttpSession session) {
 this.session=session;
 }

 public void setAttribute(String name,Object obj){
 if(session!=null){
 session.setAttribute(name,obj);
 }else{
 table.put(name,obj);
 }
 }

 public Object getAttribute(String name){
 if(session!=null){
 return session.getAttribute(name);
 }else{
 return table.get(name);
 }
 }

 /**
 * 将context会话中的变量存入HttpSession中
 * @param session
 */
 public void reverseToSession(HttpSession session){
 for(Enumeration enu=table.keys();enu.hasMoreElements();){
 String key=(String)enu.nextElement();
 session.setAttribute(key,table.get(key));
 }
 }

}

===利用session设置用户session====

package ces.platform.system.dbaccess;

import ces.frame.util.dao.PlatformDao;
import ces.platform.system.common.*;

import java.sql.*;
import java.io.*;
import java.util.*;
import javax.servlet.http.*;

public class UserSession extends OperationBase implements Serializable
{
 /**
*
*/
private static final long serialVersionUID = 1L;

/**
 * 静态常量:登录标志----成功
 **/
 public static final String LOGIN_SUCCESS = "1";
 /**
 * 静态常量:登录标志----不成功，并发用户数超过
 **/
 public static final String LOGIN_FAIL_CONN = "2";
 /**
 * 静态常量:登录标志----不成功，口令三次错误
 **/
 public static final String LOGIN_FAIL_PASSWORD = "3";
 /**
 * 静态常量:退出标志----未退出
 **/
 public static final String LOGOUT_NO = "0";
 /**
 * 静态常量:退出标志----正常退出
 **/
 public static final String LOGOUT_NORMAL = "1";
 /**
 * 静态常量:退出标志----注销退出
 **/
 public static final String LOGOUT_CANCEL = "2";

 /**
 * 静态常量:将会话变量存入session中
 **/
 public static final String STORE_SESSION = "1";
 /**
 * 静态常量:将会话变量存入property中
 **/
 public static final String STORE_PROPERTY = "2";

 /**
 * 成员变量：会话编号
 **/
 protected String sessionID;
 /**
 * 成员变量：会话开始时间，对应于t_sys_user_session.begin_date
 **/
 protected java.sql.Timestamp beginDate;

 /**
 * 成员变量：IP地址，对应于t_sys_user_session.ip_address
 **/
 protected String ipAddress;

 /**
 * 成员变量：用户对象
 **/
 protected User user;

 /**
 * 成员变量：网卡地址
 **/
 protected String macNO;

 /**
 * 成员变量：用户登录ID
 */
 protected String loginID;

 /**
 * 缺省构造函数
 *
 **/
 public UserSession() {
 //
 }

 /**
 * 构造函数1
 *
 * @param sessionID 会话编号
 **/
 public UserSession(String sessionID) {
 //
 this.sessionID = sessionID;
 }

 /**
 * 构造函数2
 *
 * @param sessionID 会话编号
 * @param beginDate 会话开始时间
 * @param ipAddress IP地址
 * @param macNO 网卡地址
 * @param loginID 用户登录ID
 * @param user 用户对象
 **/
 public UserSession(String sessionID ,
 java.sql.Timestamp beginDate ,
 String ipAddress ,
 String macNO ,
 String loginID,
 User user) {
 //
 this.sessionID = sessionID;
 this.beginDate = beginDate;
 this.ipAddress = ipAddress;
 this.macNO = macNO;
 this.loginID=loginID;
 this.user = user;
 }

 /**
 * 设置会话编号
 *
 * @param sessionID 会话编号
 **/
 public void setSessionID(String sessionID) {
 //
 this.sessionID = sessionID;
 }

 /**
 * 设置会话开始时间
 *
 * @param beginDate 会话开始时间
 **/
 public void setBeginDate(java.sql.Timestamp beginDate) {
 //
 this.beginDate = beginDate;
 }

 /**
 * 设置IP地址
 *
 * @param ipAddress IP地址
 **/
 public void setIpAddress(String ipAddress) {
 //
 this.ipAddress = ipAddress;
 }

 /**
 * 设置用户
 *
 * @param user 用户对象
 **/
 public void setUser(User user) {
 //
 this.user = user;
 }

 /**
 * 设置网卡地址
 *
 * @param macNO 网卡地址
 **/
 public void setMacNO(String macNO) {
 //
 this.macNO = macNO;

 }

 /**
 * 获取会话编号
 *
 * @return 会话编号
 **/
 public String getSessionID() {
 //
 return this.sessionID;
 }

 /**
 * 获取会话开始时间
 *
 * @return 会话开始时间
 **/
 public java.sql.Timestamp getBeginDate() {
 //
 return this.beginDate;
 }

 /**
 * 获取IP地址
 *
 * @return IP地址
 **/
 public String getIpAddress() {
 //
 return this.ipAddress;
 }

 /**
 * 获取用户
 *
 * @return 用户对象
 **/
 public User getUser() {
 //
 return this.user;
 }

 /**
 * 获取网卡地址
 *
 * @return 网卡地址
 **/
 public String getMacNO() {
 //
 return this.macNO;
 }

 /**
 * 获取用户登录ID
 * @return 登录ID
 */
 public String getLoginID() {
 return loginID;
 }

 /**
 * 设置用户登录ID
 * @param loginID
 */
 public void setLoginID(String loginID) {
 this.loginID = loginID;
 }



 //////////////////////////////////////////////////////////////////////////
 //以下成员函数有具体应用

 /**
 * 验证该用户会话对象在数据库中是否存在
 *
 * @return true: 该对象在数据库中存在
 * false: 该对象在数据空中不存在
 * @throws Exception
 * 如果验证有问题，将抛出异常
 */
 public boolean isExist() throws Exception
 {
 boolean returnValue = false;
 Connection conn = null;
 PreparedStatement ps = null;
 ResultSet result = null;
 String strQuery = "SELECT session_id FROM " + Common.USER_SESSION_TABLE
 + " WHERE session_id = ?";
 try
 {
 conn = PlatformDao.getDataSource().getConnection();
 ps = conn.prepareStatement(strQuery);
 ps.setString(1 , this.sessionID);
 result = ps.executeQuery();

 if (!result.next())
 {
 returnValue = false;
 }
 else
 {
 returnValue = true;
 }
 }
 finally
 {
 close(conn, ps, result);
 }

 return returnValue;
 }

 /**
 * 验证该用户会话对象在数据库中是否存在
 *
 * @return true: 该对象在数据库中存在
 * false: 该对象在数据空中不存在
 * @throws Exception
 * 如果验证有问题，将抛出异常
 */
 public boolean isExist(Connection con) throws Exception {
 boolean returnValue = false;

 PreparedStatement ps = null;
 ResultSet result = null;
 String strQuery = "SELECT session_id FROM " + Common.USER_SESSION_TABLE
 + " WHERE session_id = ?";

 try {

 ps = con.prepareStatement(strQuery);
 ps.setString(1 , this.sessionID);
 result = ps.executeQuery();

 if (!result.next()) {
 returnValue = false;
 } else {

 returnValue = true;
 }
 } catch (SQLException se) {
 throw new Exception(
 "User_session.isExist(): SQLException: \n\t" + se);
 } finally {
 close(null, ps, result);
 }
 return returnValue;

 }


 /**
 * 从数据库中重新装入该用户会话对象信息
 *
 * @return true: 装入成功
 * false: 装入不成功
 * @throws Exception
 * 如果装入有问题，将抛出异常
 */
 public boolean load() throws Exception
 {
 boolean returnValue = false;
 Connection conn = null;
 PreparedStatement ps = null;
 ResultSet result = null;
 String strQuery =
 "SELECT ut.user_id,ut.user_name,ut.login_name,ut.flag_emp,"
 +
 "ut.user_cryptogram,ut.flag_lock,ut.flag_define,ut.ic_no,ut.conn_num,"
 +
 "ut.flag_check,ut.flag_active,ut.flag_sa,ut.show_order,ut.position_x,ut.position_y,ut.type,"
 + "ust.session_id,ust.begin_date,ust.ip_address,ust.mac_no,ust.login_id "
 + "FROM " + Common.USER_TABLE + " ut, "
 + Common.USER_SESSION_TABLE + " ust "
 + "WHERE ut.user_id = ust.user_id "
 + "AND ust.session_id = ?";

 try
 {
 conn = PlatformDao.getDataSource().getConnection();
 ps = conn.prepareStatement(strQuery);
 ps.setString(1 , this.sessionID);
 result = ps.executeQuery();

 int i=1;
 ValueAsc va=new ValueAsc(i);
 if (!result.next())
 {
 returnValue = false;
 }
 else
 {
 i = 1;
 va.setStart(i);

 User uTemp = User.generateUser(result,va);
 this.user = uTemp;
 this.sessionID = result.getString(va.next());
 this.beginDate = result.getTimestamp(va.next());
 this.ipAddress = result.getString(va.next());
 this.macNO = result.getString(va.next());
 this.loginID=result.getString(va.next());
 returnValue = true;
 }
 }
 finally
 {
 close(conn, ps, result);
 }
 return returnValue;

 }

 /**
 * 新建该用户会话对象
 * @param conn 连接对象
 * @throws Exception
 * 如果新建有问题，将抛出异常
 */
 protected void doNew(Connection conn) throws Exception
 {

 if (!isValidate()) {
 throw new Exception(
 "User_session.doNew(): Illegal data values for insert");
 }

 PreparedStatement ps = null;
 String strQuery = "INSERT INTO " + Common.USER_SESSION_TABLE
 + "(session_id,user_id,begin_date,ip_address,mac_no,login_id)"
 + "VALUES (?,?,?,?,?,?)";
 try {
 ps = conn.prepareStatement(strQuery);
 ps.setString(1 , this.sessionID);
 ps.setInt(2 , this.user.getUserID());
 ps.setTimestamp(3 , this.beginDate);
 ps.setString(4 , this.ipAddress);
 ps.setString(5 , this.macNO);
 ps.setString(6 , this.loginID);
 int resultCount = ps.executeUpdate();

 if (resultCount != 1) {
 throw new Exception(
 "User_session.doNew(): ERROR Inserting data "
 + "in T_SYS_USER_SESSION INSERT !! resultCount = " +
 resultCount);
 }
 } catch (SQLException se) {
 throw new Exception(
 "User_session.doNew(): SQLException while inserting new user_session; "
 + "session_id = " + this.sessionID + " :\n\t" + se);
 } finally {
 close(null, ps, null);
 }
 }

 /**
 * 更新该用户会话对象
 * @param conn 连接对象
 * @throws Exception
 * 如果更新有问题，将抛出异常
 */
 protected void doUpdate(Connection conn) throws Exception {
 if (!isValidate()) {
 throw new Exception("User_session.doUpdate(): Illegal data values for update");
 }

 PreparedStatement ps = null;
 String strQuery = "UPDATE " + Common.USER_SESSION_TABLE + " SET "
 + "user_id = ?, begin_date = ? , "
 + "ip_address = ?, mac_no = ?, login_id= ? "
 + "WHERE session_id = ?";
 //logger.debug(strQuery);

 try {
 ps = conn.prepareStatement(strQuery);
 ps.setInt(1, this.user.getUserID());
 ps.setTimestamp(2, this.beginDate);
 ps.setString(3, this.ipAddress);
 ps.setString(4, this.macNO);
 ps.setString(5,this.loginID);
 ps.setString(6, this.sessionID);
 int resultCount = ps.executeUpdate();
 if (resultCount != 1) {
 throw new Exception("User_session.doUpdate(): ERROR updating data in T_SYS_USER_SESSION!! "
 + "resultCount = " + resultCount);
 }
 } catch (SQLException se) {
 throw new Exception("User_session.doUpdate(): SQLException while updating user_session; "
 + "session_id = " + this.sessionID + " :\n\t" + se);
 } finally {
 close(null, ps, null);
 }
 }

 /**
 * 根据IP更新该用户会话对象
 *
 * @throws Exception
 * 如果更新有问题，将抛出异常
 */
 public void doUpdateByIP() throws Exception {
 if (!isValidate()) {
 throw new Exception("User_session.doUpdateByIP(): Illegal data values for update");
 }

 Connection conn = null;
 PreparedStatement ps = null;
 ResultSet result = null;
 String strQuery = "UPDATE " + Common.USER_SESSION_TABLE + " SET "
 + "session_id = ?, user_id = ?, begin_date = ? , "
 + " mac_no = ?, login_id= ? "
 + "WHERE ip_address = ?";


 try {
 conn=PlatformDao.getDataSource().getConnection();
 conn.setAutoCommit(false);
 ps = conn.prepareStatement(strQuery);
 ps.setString(1, this.sessionID);
 ps.setInt(2, this.user.getUserID());
 ps.setTimestamp(3, this.beginDate);
 ps.setString(4, this.macNO);
 ps.setString(5,this.loginID);
 ps.setString(6, this.ipAddress);
 int resultCount = ps.executeUpdate();
 if (resultCount != 1) {
 conn.rollback();
 throw new Exception("User_session.doUpdateByIP(): ERROR updating data in T_SYS_USER_SESSION!! "
 + "resultCount = " + resultCount);
 }
 conn.commit();
 } catch (SQLException se) {
 if(conn!=null){
 conn.rollback();
 }
 throw new Exception("User_session.doUpdateByIP(): SQLException while updating user_session; "
 + "session_id = " + this.sessionID + " :\n\t" + se);
 } finally {
 conn.setAutoCommit(true);
 close(conn, ps, result);
 }
 }

 /**
 * 根据登录ID更新该用户会话对象
 *
 * @throws Exception
 * 如果更新有问题，将抛出异常
 */
 public void doUpdateByLoginID() throws Exception {
 if (!isValidate()) {
 throw new Exception("User_session.doUpdateByLoginID(): Illegal data values for update");
 }

 Connection conn = null;
 PreparedStatement ps = null;
 ResultSet result = null;
 String strQuery = "UPDATE " + Common.USER_SESSION_TABLE + " SET "
 + "session_id = ?, user_id = ?, begin_date = ? , "
 + "ip_address = ?, mac_no = ? "
 + "WHERE login_id= ?";


 try {
 conn=PlatformDao.getDataSource().getConnection();
 conn.setAutoCommit(false);
 ps = conn.prepareStatement(strQuery);
 ps.setString(1, this.sessionID);
 ps.setInt(2, this.user.getUserID());
 ps.setTimestamp(3, this.beginDate);
 ps.setString(4, this.ipAddress);
 ps.setString(5, this.macNO);
 ps.setString(6,this.loginID);
 int resultCount = ps.executeUpdate();
 if (resultCount != 1) {
 conn.rollback();
 throw new Exception("User_session.doUpdateByLoginID(): ERROR updating data in T_SYS_USER_SESSION!! "
 + "resultCount = " + resultCount);
 }
 conn.commit();
 } catch (SQLException se) {
 if(conn!=null){
 conn.rollback();
 }
 throw new Exception("User_session.doUpdateByLoginID(): SQLException while updating user_session; "
 + "session_id = " + this.sessionID + " :\n\t" + se);
 } finally {
 conn.setAutoCommit(true);
 close(conn, ps, result);
 }
 }

 /**
 * 在数据库中删除该用户会话对象，不提交。
 * @param conn 连接对象
 * @throws Exception
 * 如果删除有问题，将抛出异常
 */
 public void doDelete(Connection conn) throws Exception {
 PreparedStatement ps = null;
// Organize org = null;
 String strQuery = "DELETE FROM " + Common.USER_SESSION_TABLE
 + " WHERE session_id = ?";

 try {
 ps = conn.prepareStatement(strQuery);
 ps.setString(1, this.sessionID);
 int resultCount = ps.executeUpdate();
 if (resultCount != 1) {
 throw new Exception("User_session.doDelete(): ERROR deleting data in T_SYS_USER_SESSION!! "
 + "resultCount = " + resultCount);
 }
 } catch (Exception se) {
 throw new Exception("User_session.doDelete(): Exception while deleting user_session; "
 + "session_id = " + this.sessionID + " :\n\t" + se);
 } finally {
 close(null, ps, null);
 }

 }

 /**
 * 返回数据库中的所有用户会话对象
 *
 * @return 用户会话对象集合
 * @throws Exception
 * 如果查找有问题，将抛出异常
 */
 public Vector getAllUserSessions() throws Exception
 {
 Vector vAllUserSessions = new Vector();
 Connection conn = null;
 PreparedStatement ps = null;
 ResultSet result = null;
 String strQuery = "SELECT ut.user_id,ut.user_name,ut.login_name,ut.flag_emp,"
 + "ut.user_cryptogram,ut.flag_lock,ut.flag_define,ut.ic_no,ut.conn_num,"
 + "ut.flag_check,ut.flag_active,ut.flag_sa,ut.show_order,ut.position_x,ut.position_y,ut.type,"
 + "ust.session_id,ust.begin_date,ust.ip_address,ust.mac_no,ust.login_id "
 + "FROM " + Common.USER_TABLE + " ut, "
 + Common.USER_SESSION_TABLE + " ust "
 + "WHERE ut.user_id = ust.user_id";

 try {
 conn = PlatformDao.getDataSource().getConnection();
 ps = conn.prepareStatement(strQuery);
 result = ps.executeQuery();

 int i = 1;
 ValueAsc va = new ValueAsc(i);
 while (result.next())
 {
 i = 1;
 va.setStart(i);

 User uTemp = User.generateUser(result,va);

 UserSession usTemp = UserSession.generateUserSession(result,va,uTemp);
 vAllUserSessions.addElement(usTemp);
 }
 }
 catch (SQLException se)
 {
 throw new Exception("User_session.getAllUserSessions(): SQLException: \n\t" + se);
 }
 finally
 {
 close(conn, ps, result);
 }
 return vAllUserSessions;

 }

 /**
 * 生成查询会话对象
 * @param result 查询结果集
 * @param v 计数器
 * @return 返回生成的对象
 */
 public static UserSession generateUserSession(ResultSet result,ValueAsc v,User user) {
 UserSession usTemp=new UserSession();
 try{
 usTemp.setSessionID(result.getString(v.next()));
 usTemp.setBeginDate(result.getTimestamp(v.next()));
 usTemp.setIpAddress(result.getString(v.next()));
 usTemp.setMacNO(result.getString(v.next()));
 usTemp.setLoginID(result.getString(v.next()));
 usTemp.setUser(user);
 }catch(Exception e){
 e.printStackTrace();
 }
 return usTemp;
 }

 /**
 * 验证存入用户会话表中的数据
 *
 * @return true: 验证成功
 * false: 验证失败
 */
 protected boolean isValidate()
 {
 if ( (this.sessionID == null) ||
 (this.user == null) ||
 (this.user.getUserID() == 0))
 {
 return (false);
 }
 else
 {
 return (true);
 }
 }

 /**
 * 存储会话变量，放入session还是自定义的属性集合
 * @param type 1:放入session中，2：放入自定义的属性集合中
 */
 public static SessionProperty setAttributeBatch(String type,HttpSession session,User user) throws Exception {
 SessionProperty sp=null;
 if(type.equals(UserSession.STORE_SESSION)){
 sp=new SessionProperty(session);
 }else{
 sp=new SessionProperty();
 }
 //设置session变量
 Vector authorities=null;

 try{
 authorities=user.getAuthoritiesFromContext();
 //authorities=new Vector();
 sp.setAttribute("authority",authorities);
 sp.setAttribute("user",user);
 sp.setAttribute("sa",user.getFlagSA());
 }catch(Exception e){
 throw e;
 }

 /*
 for(int i=0;i<authorities.size();i++){
 Authority au=(Authority)authorities.get(i);
 logger.debug(au.getAuthorityID());
 logger.debug(au.getPath());
 }
 */

 return sp;
 }

 /**
 * 服务器启动时清空会话表
 */
 public static void clearSession() throws Exception
 {
 try
 {
 Vector vAllSession = new UserSession().getAllUserSessions();
 int nNum = vAllSession.size();
 UserSession[] delTemp=new UserSession[nNum];
 UserSessionHistory[] addTemp=new UserSessionHistory[nNum];
 for (int i=0; i<nNum; i++)
 {
 UserSession us=(UserSession)vAllSession.get(i);
 String strSessionID=us.getSessionID();
 Timestamp tBegin=us.getBeginDate();
 String strIP=us.getIpAddress();
 String strMacNO=us.getMacNO();
 User user=us.getUser();
 User admin=new User(1);
 admin.load();
 delTemp[i]=us;

 //在历史表中增加一条记录
 UserSessionHistory ush=new UserSessionHistory(strSessionID);
 ush.setBeginDate(tBegin);
 ush.setEndDate(Common.getSysDate());
 ush.setIpAddress(strIP);
 ush.setMacNO(strMacNO);
 ush.setUser(user);
 ush.setLoginFlag(UserSession.LOGIN_SUCCESS);
 ush.setLogoutFlag(UserSession.LOGOUT_NO);
 ush.setCancelPerson(admin);
 addTemp[i]=ush;
 }
 new UserSession().doDeleteBatch(delTemp);
 new UserSessionHistory().doAddBatch(addTemp);
 }
 catch(Exception e)
 {
 e.printStackTrace();
 throw new Exception("UserSession.clearSession(): SQLException: \n\t" + e);
 }
 }

}

========上面的session是这里传过来的===
package ces.frame.module.login.action;

import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Vector;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.actions.DispatchAction;

import ces.frame.module.utilize.bo.ArchiveExborrowBO;
import ces.frame.util.CommonUtil;
import ces.frame.util.Transition;
import ces.frame.util.dao.CommonDao;
import ces.platform.system.action.UserSessionAction;
import ces.platform.system.common.MD5;
import ces.platform.system.common.SessionBind;
import ces.platform.system.dbaccess.LoginableTime;
import ces.platform.system.dbaccess.User;
import ces.platform.system.dbaccess.UserSession;
import ces.platform.system.form.UserSessionForm;

/**
*
* @author nfs
*
*/
public class LoginAction extends DispatchAction
{
private ArchiveExborrowBO archiveExborrowBO = null;
public ArchiveExborrowBO getArchiveExborrowBO() {
return archiveExborrowBO;
}

public void setArchiveExborrowBO(ArchiveExborrowBO archiveExborrowBO) {
this.archiveExborrowBO = archiveExborrowBO;
}

/**
* ��¼
* @param request
* @param form
* @return
*/
public ActionForward login(ActionMapping mapping,
 ActionForm form,
 HttpServletRequest request,
 HttpServletResponse response)
{
String target = "success";
String tip = "tip";
//�û��Ƿ�ҪMD5
String encrypt = "true";
HttpSession session = request.getSession(true);
DynaActionForm dForm = (DynaActionForm)form;

Vector vector = new Vector();
HashMap map = new HashMap();
map.put("urlName", "��µ�¼");
map.put("urlValue", "/login.jsp");
vector.add(map);
 request.setAttribute("loginTip","1");

 String loginName = dForm.get("loginName").toString();
 String userPass = dForm.get("userPass").toString();
 //0��ʲ�ݵ�½ 1��ҵ�½
 String is_szdag = dForm.get("is_szdag").toString();

 if (!"false".equals(encrypt))
 {
 //�ѱ��ϵ��MD5
 userPass = new MD5().getMD5ofStr(userPass);
 }

 int userID = 0;
 User user = null;

 String strSessionID = "";
 String strCount = "";
 int intCount = 0;
 UserSession usAdd = null;
 try
 {
 int ID = new User().getUserID(loginName);
 boolean flag = new LoginableTime().isLoginable();
 if (ID!=1)
 {
 if (!flag)
 {
 request.setAttribute("url", vector);
 request.setAttribute("message", "��ֹ��¼��");
 return mapping.findForward(tip);
 }
 }
 /*
 //��Ϊ��ҵ�½��ж��û��Ƿ��ڿɵ�½
 String sql = "select count(*) from t_role_user t where t.user_id='"+ID+"' and t.role_id=(select t.role_id from t_role t where t.rolekey='CDRY')";
 int count = CommonDao.getJdbcTemplate().queryForInt(sql);
 if(count==0 && "1".equals(is_szdag)){
 //loginName="";
 }*/
 //======================

 }
 catch (Exception e)
 {
 request.setAttribute("url", vector);
request.setAttribute("message", e.getMessage());
return mapping.findForward(tip);
 }
 strCount = (String)session.getAttribute("count");

 if ((strCount!=null) && (!strCount.equals("")))
 {
 intCount = java.lang.Integer.parseInt(strCount);
 }

// if (intCount>=3)
// {
// request.setAttribute("messageKey", messageKey + "overlogin");
// return mapping.findForward("error");
// // "�Բ��Ѿ��Ƿ��¼3�Σ��