JavaWeb在线考试系统

package com.wgh.action; import javax.servlet.http.*; import org.apache.struts.action.*; import com.wgh.actionForm.LessonForm; import com.wgh.actionForm.MoreSelect; import com.wgh.actionForm.QuestionsForm; import com.wgh.actionForm.TaoTiForm; import com.wgh.core.ChStr; import com.wgh.dao.LessonDAO; import com.wgh.dao.StartExamDAO; import com.wgh.dao.TaoTiDAO; import java.util.*; public class StartExam extends Action { private StartExamDAO startExamDAO = null; ChStr chStr=new ChStr(); public StartExam() { this.startExamDAO = new StartExamDAO(); } public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { String action = request.getParameter("action"); //System.out.println("获取的查询字符串：" + action); if ("startExam".equals(action)) { return startExam(mapping, form, request, response); }else if("submitTestPaper".equals(action)){ return submitTestPaper(mapping,form,request,response); }else if("showStartTime".equals(action)){//显示考试计时 return showStartTime(mapping,form,request,response); }else if("showRemainTime".equals(action)){//显示考试时间 return showRemainTime(mapping,form,request,response); }else{ request.setAttribute("error", "操作失败！"); return mapping.findForward("error"); } } //计时 private ActionForward showStartTime(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { HttpSession session = request.getSession(); String startTime=session.getAttribute("startTime").toString(); long a=Long.parseLong(startTime); long b=new java.util.Date().getTime(); int h=(int)Math.abs((b-a)/3600000); String hour=chStr.formatNO(h,2); int m=(int)(b-a)%3600000/60000; String minute=chStr.formatNO(m,2); int s=(int)((b-a)%3600000)%60000/1000; String second=chStr.formatNO(s,2); String time=hour+":"+minute+":"+second; request.setAttribute("showStartTime",time); return mapping.findForward("showStartTime"); } //计算剩余时间 private ActionForward showRemainTime(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { HttpSession session = request.getSession(); String startTime=session.getAttribute("startTime").toString(); long a=Long.parseLong(startTime); long b=new java.util.Date().getTime(); long r=20*60000-(b-a-1000); int h=(int)Math.abs(r/3600000); String hour=chStr.formatNO(h,2); int m=(int)(r)%3600000/60000; String minute=chStr.formatNO(m,2); int s=(int)((r)%3600000)%60000/1000; String second=chStr.formatNO(s,2); String time=hour+":"+minute+":"+second; request.setAttribute("showRemainTime",time); return mapping.findForward("showRemainTime"); } // 获取考试题目信息 private ActionForward startExam(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { //System.out.println("课程ID："+lessonForm.getID()+lessonForm.getName()); HttpSession session = request.getSession(); if(session.getAttribute("student")==null || session.getAttribute("student").equals("")){ return mapping.findForward("dealNull"); //转到前台登录页面 }else{ String student=session.getAttribute("student").toString(); //学号 if(session.getAttribute("lessonID")==null || session.getAttribute("lessonID").equals("")){ return mapping.findForward("dealNull"); //转到前台登录页面 }else{ int lessonID=Integer.parseInt(session.getAttribute("lessonID").toString()); //课程ID //随机抽取试题 int questions=startExamDAO.randomGetQuestion(lessonID); //刚开始考试时保存考试结果 int ret=startExamDAO.startSaveResult(student,lessonID); // System.out.println("刚开始考试时保存考试结果："+ret); List singleQue=(List)startExamDAO.queryExam(questions,0); QuestionsForm q=(QuestionsForm)form; q.setSize(singleQue.size()); request.setAttribute("singleQue",singleQue); //获取单选题 List moreQue=(List)startExamDAO.queryExam(questions,1); //获取多选题 q.setMoreSize(moreQue.size()); request.setAttribute("moreQue",moreQue); session.setAttribute("startTime",new java.util.Date().getTime()); return mapping.findForward("testPaper"); } } } //提交试卷 private ActionForward submitTestPaper(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response){ QuestionsForm q=(QuestionsForm)form; String rightAnswer=""; float singleMark=0; float moreMark=0; /****************************统计单选题的得分**************************************/ String[] single=q.getAnswerArrS(); int[] singleId=q.getIdArrS(); //System.out.println(q.getID()); System.out.println("数据的长度："+single.length); float markS=40/(single.length); for(int i=0;i<single.length;i++){ //调用getRightAnswer()方法获取正确答案 rightAnswer=startExamDAO.getRightAnswer(singleId[i]); System.out.println("单选数组："+i+"********ID号"+singleId[i]+"********"+single[i]+"****正确答案"+rightAnswer); if(rightAnswer.equals(single[i])){ singleMark=singleMark+markS; //累加单选题的分数 } } System.out.println("单选题得分："+singleMark); /*********************************************************************************/ /****************************统计多选题的得分**************************************/ MoreSelect[] more=q.getMoreSelect(); System.out.println("多选数组的长度："+more.length); float markM=60/(more.length); String str=""; for(int i=0;i<more.length;i++){ String[] ans=more[i].getAnswerArr(); int[] moreId=q.getIdArrM(); rightAnswer=startExamDAO.getRightAnswer(moreId[i]); System.out.println("多选数组："+i+"********ID号"+moreId[i]+"********"+more[i]+"****正确答案"+rightAnswer); for(int j=0;j<ans.length;j++){ if(ans[j]!=null) str=str+ans[j]+","; } if(str.length()>1){ str=str.substring(0,str.length()-1); } System.out.println("获取的多选题答案："+str); if(rightAnswer.equals(str)){ moreMark=moreMark+markM; //累加多选题的分数 } str=""; } System.out.println("多选题得分："+moreMark); /*********************************************************************************/ HttpSession session = request.getSession(); String student=session.getAttribute("student").toString(); int lessonID=Integer.parseInt(session.getAttribute("lessonID").toString()); //课程ID int ret=startExamDAO.saveResult(student,lessonID,(int)Math.round(singleMark),(int)Math.round(moreMark)); if(ret>0){ request.setAttribute("submitTestPaperok", "试卷已提交，您本次考试的成绩为："+(Math.round(singleMark)+Math.round(moreMark))+"分！"); return mapping.findForward("submitTestPaperok"); }else{ return mapping.findForward("dealNull"); } } }