user.java

这是＜＜JBuilder2005实战JSP开发＞＞的 源代码．

package bookstore;

import javax.servlet.http.HttpSessionBindingListener;
import javax.servlet.http.HttpSessionBindingEvent;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Date;

public class User
    implements HttpSessionBindingListener
{
    private String userId;
    private String password;
    private String userName;
    private String loginDatetime;

    public String getPassword()
    {
        return password;
    }

    public String getUserId()
    {
        return userId;
    }

    public String getUserName()
    {
        return userName;
    }

    public void setPassword(String password)
    {
        this.password = password;
    }

    public void setUserId(String userId)
    {
        this.userId = userId;
    }

    public void setUserName(String userName)
    {
        this.userName = userName;
    }

    public void valueBound(HttpSessionBindingEvent event)
    {
        Connection conn = null;
        String sqlStr = "insert into T_LOGIN_LOG(ID, USER_ID, DT_LOGIN) " +
                        " values(SEQ_LOGIN_LOG_ID.NEXTVAL,?,? )";
        try
        {
            conn = DBConnection.getConnection();
            PreparedStatement pStat = conn.prepareStatement(sqlStr);
            loginDatetime = getCurrDatetimeStr(); //当前时间串
            pStat.setString(1, userId);
            pStat.setString(2, loginDatetime);
            pStat.executeUpdate();

        } catch (SQLException e)
        {
             e.printStackTrace();
            throw new RuntimeException("用户登陆日志写入出错");

        } finally
        {
            try
            {
                if (conn != null)
                {
                    conn.close();
                }
            } catch (SQLException ex)
            {
                ex.printStackTrace();
            }
        }
    }

    public void valueUnbound(HttpSessionBindingEvent event)
    {
        Connection conn = null;
        String sqlStr = " update  T_LOGIN_LOG set DT_LONOUT = ? " +
                        " where USER_ID=? and DT_LOGIN = ?";
        try
        {
            conn = DBConnection.getConnection();
            PreparedStatement pStat = conn.prepareStatement(sqlStr);
            pStat.setString(1, getCurrDatetimeStr());
            pStat.setString(2, userId);
            pStat.setString(3, loginDatetime);
            pStat.executeUpdate();

        } catch (SQLException e)
        {
            throw new RuntimeException(
                "用户退出日志写入出错");
        } finally
        {
            try
            {
                if (conn != null)
                {
                    conn.close();
                }
            } catch (SQLException ex)
            {
                ex.printStackTrace();
            }
        }
    }

    /**
     * 获取当前时间字串，以yyyyMMddHHmmss格式返回，如20050505010101
     * @return String
     */
    private static String getCurrDatetimeStr()
    {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        return sdf.format(new Date());
    }
}