aadmincategory.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.*;

/**
 * 针对管理系统分类选择的Servlet
 * @author ShenYK
 * @version 1.0
 */
public class AAdminCategory
{
    //选择分类迁移到问题一览
    public void doStart( Hashtable inputData, 
                          Hashtable outputData,
                          HttpSession mySession )
        throws Exception
    {
        //首先获得对应的分类ID
        String sCategoryId = (String)inputData.get("categoryId");
        
        //调用对应的logic类
        LQuestion lQuestion = (LQuestion)GlobalObjectProvider.getLogicService(CommonConst.LOGIC_KEY_QUESTION);
        
        try
        {
            Vector vQuestions = lQuestion.getAllQuestionsByCategoryId( sCategoryId );
            if ( vQuestions == null )
            {
                outputData.put( "pageId", CommonConst.VIEWID_ADMIN_CATEGORY );
                outputData.put( "errMsg", "发生了内部错误，请联系技术人员！" );
                return;
            }
            else
            {   //确定要去的页面(试题一览页面)
                outputData.put( "pageId", CommonConst.VIEWID_ADMIN_QUESTION_LIST);
                //由于需要在页面迁移中使用题库和分类，所以放到session中
                mySession.setAttribute( "adminQuestions", vQuestions );
                mySession.setAttribute( "selectCategory", sCategoryId );
                //往值域中设置当前题目及位置信息
                outputData.put( "pageIndex", new Integer(0) );
                return;
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
            outputData.put( "pageId", CommonConst.VIEWID_ADMIN_CATEGORY );
            outputData.put( "errMsg", "发生了内部错误，请联系技术人员！" );
            return;
        }
    }
    
}