aadminquestionadd.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.*;

/**
 * 针对管理系统问题修改页面的Servlet
 * @author ShenYK
 * @version 1.0
 */
public class AAdminQuestionAdd
{
    //到首页
    public void doRegister( Hashtable inputData, 
                             Hashtable outputData,
                             HttpSession mySession )
        throws Exception
    {
        //首先获得要修改的问题详细信息
        String sCategoryId = (String)mySession.getAttribute("selectCategory");
        String sDifficulty = (String)inputData.get("difficulty");
        String sSubject    = (String)inputData.get("subject");
        String sChoiceA    = (String)inputData.get("choiceA");
        String sChoiceB    = (String)inputData.get("choiceB");
        String sChoiceC    = (String)inputData.get("choiceC");
        String sChoiceD    = (String)inputData.get("choiceD");
        String sAnswer     = (String)inputData.get("answer");
        
        //生成一个Question对象以调用
        Question questionObj = new Question();
        questionObj.setCategoryId( sCategoryId );
        questionObj.setDifficulty( sDifficulty );
        questionObj.setSubject( sSubject );
        questionObj.setChoiceA( sChoiceA );
        questionObj.setChoiceB( sChoiceB );
        questionObj.setChoiceC( sChoiceC );
        questionObj.setChoiceD( sChoiceD );
        questionObj.setAnswer( sAnswer );
        
        //调用对应的logic类
        LQuestion lQuestion = (LQuestion)GlobalObjectProvider.getLogicService(CommonConst.LOGIC_KEY_QUESTION);
        //删除对应的记录
        lQuestion.addQuestion( questionObj );
        //然后重新检索，并定位到最后一页（这样可以看到刚才登录的那一条记录）
        Vector vQuestions = lQuestion.getAllQuestionsByCategoryId( sCategoryId );
        
        //由于需要在页面迁移中使用题库，所以放到session中
        mySession.setAttribute( "adminQuestions", vQuestions );
        
        int iMax = vQuestions.size();
        int iMaxPage = (int)Math.ceil((double)iMax/20);
        int iIndex = (iMaxPage-1)*20;

        outputData.put( "pageId", CommonConst.VIEWID_ADMIN_QUESTION_LIST);
        //往值域中设置当前题目及位置信息
        outputData.put( "pageIndex", new Integer(iIndex) );
        return;
    }
    

}