student_examinationaction.java

可以实现在线考试

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package action;

import java.util.ArrayList;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import po.QuestionPO;
import vo.*;
import business.Exam_paperDAO;

/** 
 * MyEclipse Struts
 * Creation date: 04-29-2007
 * 
 * XDoclet definition:
 * @struts.action validate="true"
 */
public class student_examinationAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		//遍历出试题
		
		String submit = (String)request.getParameter("submit");
		HttpSession session = request.getSession();
		
		String rkey = (String)session.getAttribute("rkey");//答对题数
		String wkey = (String)session.getAttribute("wkey");//答错题数
		String examno = (String)session.getAttribute("examno");//题号
		QuestionPO qpo = (QuestionPO)session.getAttribute("qpo");//所出的题
		ArrayList al = (ArrayList)session.getAttribute("list");
		String rightkey = (String)session.getAttribute("rightkey");
		String wrongkey = (String)session.getAttribute("wrongkey");
		String did = (String)session.getAttribute("did");
		String cno = (String)session.getAttribute("cid");
		String cid = (String)request.getParameter("cid");
		String time = (String)request.getParameter("time1");
		QuestionPO qu = (QuestionPO)session.getAttribute("QuestionPO");
		QuestionPO quu = null;
		ArrayList arraylist = new ArrayList();
		overanswerVO overanswer = (overanswerVO)session.getAttribute("overanswer");//答过的题
		overanswersVO overanswers = (overanswersVO)session.getAttribute("overanswers");//学生的答案
		
		if(overanswer == null)
		{
			overanswer = new overanswerVO();
			overanswer.setArray(arraylist); 
		}
		if(overanswers == null)
		{
			overanswers = new overanswersVO();
			overanswers.setAl(arraylist); 
		}
		
		session.setAttribute("time", time);
		
		Exam_paperDAO epdao = new Exam_paperDAO();
		if(cno != null)
		{
			cid = cno;
		}
		ArrayList array = epdao.findByCid(Integer.parseInt(cid));
		
		int[] sign = new int[20];
		
		if(submit == null || submit.equals("下一题"))
		{
			
			if(rkey==null && wkey==null && examno==null && qpo==null)
			{
				rkey = "0";
				wkey = "0";
				examno = "1";
				rightkey = "0";
				wrongkey = "0";
				did = "1";
				
				for(int i =0;i<array.size();i++)
				{
					QuestionPO q = (QuestionPO)array.get(i);
					
					sign[i] = q.getQid();
				}
				
				
					int paperid = (int)(Math.random()*array.size());//随机取题
					for(int j = 0;j<array.size();j++)
					{
						qpo = (QuestionPO)array.get(j);//将此题写入PO中
						
							if(sign[paperid] != -1)//标志位1代表无标志位
							{
								sign[paperid] = -1;
								
									qpo.setSign(sign);
									overanswer.getArray().add(qpo);
								
									session.setAttribute("overanswer",overanswer);//答过的题
									session.setAttribute("rkey",rkey);//答对题数
									session.setAttribute("wkey",wkey);//答错题数
									
									session.setAttribute("examno",examno);//题号
									session.setAttribute("qpo",qpo);//所出的题
									session.setAttribute("rightkey",rightkey);
									session.setAttribute("wrongkey",wrongkey);
									session.setAttribute("wrongkey",wrongkey);
									session.setAttribute("cid",cid);
									session.setAttribute("did",did);
									break;
							}
					}
			}
			//第二次
			else
			{
				if(qu != null)
				{
					
					quu = qu;
				}
				else
				{
					quu = qpo;
				}
				String single = (String)request.getParameter("single");
				
				if(single.equals(quu.getAnswer()))
				{
					rightkey = (Integer.parseInt(rightkey)+1)+"";
					rkey = (Integer.parseInt(rkey)+1)+"";
					session.setAttribute("rkey",rkey);
					
					if(rightkey.equals("3"))
					{
						did = quu.getDid()+"";
						if(did.equals("3"))
						{
							quu.setDid(3);
						}
						else
						{
							did = (quu.getDid()+1)+"";
						}
						session.setAttribute("did",did);
						rightkey = "0";
					}
				}
				else
				{
					wrongkey = (Integer.parseInt(wrongkey)+1)+"";
					wkey = (Integer.parseInt(wkey)+1)+"";
					session.setAttribute("wkey",wkey);
					if(wrongkey.equals("3"))
					{
						did = quu.getDid()+"";
						if(did.equals("1"))
						{
							quu.setDid(1);
						}
						else
						{
							did = (quu.getDid()-1)+"";
						}
						session.setAttribute("did",did);
						wrongkey = "0";
					}
				}
				//继续选题
				
					sign = qpo.getSign();
				
					int paperid = (int)(Math.random()*array.size());//随机取题
					while(true)
					{
							if(sign[paperid] != -1)//标志位1代表无标志位
							{
								qu = new Exam_paperDAO().findByID(sign[paperid]);
								sign[paperid] = -1;
								
									qpo.setSign(sign);
									overanswer.getArray().add(qu);
									overanswers.getAl().add(single);
									
									session.setAttribute("list",al);
									session.setAttribute("overanswer",overanswer);//答过的题
									session.setAttribute("overanswers",overanswers);//学生的答案
									session.setAttribute("examno",(Integer.parseInt(examno)+1)+"");//题号
									session.setAttribute("rightkey",rightkey);
									session.setAttribute("wrongkey",wrongkey);
									session.setAttribute("cid",cno);
									session.setAttribute("QuestionPO", qu);
									break;
							}
							else
							{
								paperid = (int)(Math.random()*array.size());//随机取题
							}
					}
				}
			return mapping.findForward("ok");//student_examination.jsp
		}
		else
		{
			
			return mapping.findForward("no");//student_submitpaterAction.do
		}
	}
}