aexamineetest.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.*;

/**
 * 针对答题页面的Servlet
 * @author ShenYK
 * @version 1.0
 */
public class AExamineeTest
{
    //题目向前跳转
    public void doPrev( Hashtable inputData, 
                         Hashtable outputData,
                         HttpSession mySession )
        throws Exception
    {
        //首先获得当前题目的答案
        String sIndex = (String)inputData.get("qIndex");
        String sAnswer = (String)inputData.get("choice");
        if ( sAnswer == null || sAnswer.equals("") )
        {
            sAnswer = "0";
        }
        
        //题目答案应该放在session中在完成的时候再提交
        Hashtable hAnswers = (Hashtable)mySession.getAttribute("answers");
        if ( hAnswers == null )
        {
            hAnswers = new Hashtable();
            mySession.setAttribute("answers", hAnswers );
        }
        hAnswers.put( sIndex, sAnswer );
        
        //决定下标，然后跳转页面
        int iNext = (new Integer(sIndex)).intValue() - 1;
        outputData.put( "questionIndex", new Integer(iNext) );
        outputData.put( "pageId", CommonConst.VIEWID_EXAMINEE_TEST );
        return;
    }
    
    //题目向后跳转
    public void doNext( Hashtable inputData, 
                         Hashtable outputData,
                         HttpSession mySession )
        throws Exception
    {
        //首先获得当前题目的答案
        String sIndex = (String)inputData.get("qIndex");
        String sAnswer = (String)inputData.get("choice");
        if ( sAnswer == null || sAnswer.equals("") )
        {
            sAnswer = "0";
        }
        
        //题目答案应该放在session中在完成的时候再提交
        Hashtable hAnswers = (Hashtable)mySession.getAttribute("answers");
        if ( hAnswers == null )
        {
            hAnswers = new Hashtable();
            mySession.setAttribute("answers", hAnswers );
        }
        hAnswers.put( sIndex, sAnswer );
        
        //决定下标，然后跳转页面
        int iNext = (new Integer(sIndex)).intValue() + 1;
        outputData.put( "questionIndex", new Integer(iNext) );
        outputData.put( "pageId", CommonConst.VIEWID_EXAMINEE_TEST );
        return;
    }
    
    //完成
    public void doEnd( Hashtable inputData, 
                        Hashtable outputData,
                        HttpSession mySession )
        throws Exception
    {
        //首先获得当前题目的答案
        String sIndex = (String)inputData.get("qIndex");
        String sAnswer = (String)inputData.get("choice");
        if ( sAnswer == null || sAnswer.equals("") )
        {
            sAnswer = "0";
        }
        
        //题目答案应该放在session中在完成的时候再提交
        Hashtable hAnswers = (Hashtable)mySession.getAttribute("answers");
        if ( hAnswers == null )
        {
            hAnswers = new Hashtable();
            mySession.setAttribute("answers", hAnswers );
        }
        hAnswers.put( sIndex, sAnswer );
        
        //获得当前的用户
        String sUsername = ((User)mySession.getAttribute("loginUser")).getUsername();
        //获得当前的分类
        String sCategoryId = (String)mySession.getAttribute("examineeCategory");
        
        //获得所有题目
        Vector allQuestions = (Vector)mySession.getAttribute("examineeQuestions");
        //调用对应的logic类
        LQuestion lQuestion = (LQuestion)GlobalObjectProvider.getLogicService(CommonConst.LOGIC_KEY_QUESTION);
        
        int[] iResult = lQuestion.calculateResult( sUsername, sCategoryId, allQuestions, hAnswers );
        
        //计算完成以后，将相关session变量清除
        mySession.removeAttribute("answers");
        mySession.removeAttribute("examineeQuestions");
        mySession.removeAttribute("examineeCategory");
        //迁移到答题结果页面
        outputData.put( "pageId", CommonConst.VIEWID_EXAMINEE_RESULT );
        outputData.put( "iResult", new Integer(iResult[0]) );
        outputData.put( "iOrder", new Integer(iResult[1]) );
        return;
    }
}