alogin.java

在线模拟选课系统

/*
 * This product includes software developed by the
 * Apache Software Foundation (http://www.apache.org/).
 */
package ch07.action;

import java.io.*;
import java.util.*;

import javax.servlet.*;
import javax.servlet.http.*;

import ch07.*;
import ch07.object.unit.*;
import ch07.logic.*;
import ch07.global.*;
import ch07.database.*;

/**
 * 针对登录页面的Servlet
 * @author ShenYK
 * @version 1.0
 */
public class ALogin
{
    public void doLogin ( Hashtable inputData, 
                             Hashtable outputData,
                             HttpSession mySession )
        throws Exception
    {
        //获取输入信息
        String sUsername = (String)inputData.get("username");
        String sPassword = (String)inputData.get("password");
        
        //校验用户输入信息
        LUser lUser = (LUser)GlobalObjectProvider.getLogicService(CommonConst.LOGIC_KEY_USER);
        //如果对应的类没有的话,报错并返回login页面
        if ( lUser == null )
        {
            outputData.put( "pageId", CommonConst.VIEWID_LOGIN );
            outputData.put( "errMsg", "发生了内部错误，请联系技术人员！" );
            return;
        }
        
        try
        {
            User userInfo = lUser.getUserInfo( sUsername, sPassword );
            if ( userInfo == null )
            {
                outputData.put( "pageId", CommonConst.VIEWID_LOGIN );
                outputData.put( "errMsg", "用户名密码检查失败！请重新输入。" );
                outputData.put( "username", sUsername );
                return;
            }
            else
            {   
                //根据用户级别确定要去的页面
                String sRank = userInfo.getRank();
                if ( sRank.equals("1") )
                {
                    outputData.put( "pageId", CommonConst.VIEWID_ADMIN_MENU);
                }
                else
                {
                    outputData.put( "pageId", CommonConst.VIEWID_EXAMINEE_MENU );
                }
                
                //往session中设置用户信息
                mySession.setAttribute( "loginUser", userInfo );
                return;
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
            outputData.put( "pageId", CommonConst.VIEWID_LOGIN );
            outputData.put( "errMsg", "发生了内部错误，请联系技术人员！" );
            outputData.put( "username", sUsername );
            return;
        }

    }
}