Java实现在线考试系统与设计（学生功能）(java,在线,考试,编程语言)

@InitBinder public void initBinder(WebDataBinder binder) { SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true)); } @RequestMapping("/list") public String showExam(HttpServletRequest request,Integer curr, Model model){ if (curr == null){ curr = 1; } HttpSession session = request.getSession(); Student student = (Student) session.getAttribute("studentInfo"); Integer classesid = student.getClassesid(); if (classesid != null){ PageInfo<Publishexam> publishexamList = publishExamService.selectAll(classesid, curr, 5); model.addAttribute("publishexamList", publishexamList); } model.addAttribute("studentInfo", student); return "/exam/list"; } //进入考试页面，初始化数据 @SuppressWarnings("unchecked") @RequestMapping("/exam") public String exam(HttpServletRequest request,int id,Model model){ //0表示0.5小时，1表示1小时，2表示1.5小时，3表示2小时，4表示2.5小时，5表示3小时 //考试时间所对应的毫秒数 long[] dateLong = {30*60*1000, 60*60*1000, 90*60*1000, 120*60*1000, 150*60*1000, 180*60*1000}; PublishexamWithBLOBs publishexam = publishExamService.selectByKey(id); HttpSession session = request.getSession(); Student student = (Student) session.getAttribute("studentInfo"); //在考试记录表中添加一条考试信息 Examhis examhis = examhisService.studentIsNotExam(student.getId(), publishexam.getSubjectId(), publishexam.getExamtime()); List<Text> textList = null; ArrayList<TextModel> list = JsonUtils.toBean(publishexam.getExam(), ArrayList.class, TextModel.class); Date date = new Date(); Date date2 = new Date(); date2.setTime(publishexam.getExamtime().getTime() + dateLong[publishexam.getExamlength()]); //当前时间如果在考试时间之前,考试还未开始 if (date.compareTo(publishexam.getExamtime()) <= 0){ model.addAttribute("message", "对不起当前考试还未开始!"); return "/message"; } /*1.当前时间>考试时间+考试时长，考试已经结束 2.examhis=null，则证明作者第一次点击开始考试 如果examhis不为空 状态为1:表示正在考试 状态为2:表示已经考试结束， 状态为3:表示老师已经阅完试卷 */ if (date.compareTo(date2) >= 0 || (examhis != null && examhis.getStatus() != 1)){ model.addAttribute("message", "对不起当前考试已经结束!"); return "/message"; } if (examhis == null){ examhis = new Examhis(); examhis.setStudentid(student.getId()); examhis.setStudentname(student.getName()); examhis.setSubjectid(publishexam.getSubjectId()); examhis.setSubjectname(publishexam.getSubjectName()); examhis.setClassesid(student.getClassesid()); examhis.setClassesname(student.getClassesname()); examhis.setPublishexamid(id); examhis.setExamtime(publishexam.getExamtime()); examhis.setStatus(1); textList = new ArrayList<Text>(); for (TextModel textModel : list) { List<Text> text = textService.beginExam(textModel,publishexam.getSubjectId()); for (Text text2 : text) { text2.setTexId(textModel.getTextModelId()); } textList.addAll(text); } String json = JsonUtils.toJson(textList); examhis.setExamtest(json); examhisService.insert(examhis); }else{ textList = JsonUtils.toBean(examhis.getExamtest(), ArrayList.class, Text.class); } int sum = 0; for (TextModel textModel : list) { sum += textModel.getGrade()*textModel.getTextCount(); } List<Textmodel> textModelList = textModelService.selectTextModel(list); model.addAttribute("textModelList", textModelList); model.addAttribute("studentInfo", student); model.addAttribute("textList", textList); model.addAttribute("publishexam", publishexam); model.addAttribute("sum", sum); model.addAttribute("examTimeLength", dateLong[publishexam.getExamlength()]/1000); model.addAttribute("examTime", (date2.getTime() - date.getTime())/1000); return "/exam/exam"; } //提交考试方法 @RequestMapping(value="/examEnd", method=RequestMethod.POST) @ResponseBody public AjaxResult examEnd(HttpServletRequest request, ExamList examList, int id){ PublishexamWithBLOBs publishexam = publishExamService.selectByKey(id); HttpSession session = request.getSession(); Student student = (Student) session.getAttribute("studentInfo"); //将考试信息转成json，改变考试状态，更新到考试历史记录表中 Examhis examhis = examhisService.studentIsNotExam(student.getId(), publishexam.getSubjectId(), publishexam.getExamtime()); List<Exam> list = examList.getExamList(); list.remove(0); for (Exam exam : list) { exam.setText(textService.selectOne(exam.getTextId())); if (exam.getAnswer() == null){ exam.setAnswer(" "); } } String json = JsonUtils.toJson(list); examhis.setExamtest(json); examhis.setStatus(2); examhisService.update(examhis); return AjaxResult.successInstance("您已成功提交考试"); }

 <script type="text/javascript"> //JS实现倒计时，考试结束提交试卷 function startTime(){ //定义考试剩余时间，时间为毫秒数 //examTime = "${examTime}";//对考试剩余时间赋值 //var exam = parseInt("${examTime}"); var examTime = parseInt(examTimes.innerHTML); var examTimeLength;//考试时长 examTimeLength = "${examTimeLength}"; if ((examTime)<0){ alert("考试时间到!\n即将提交试卷!"); document.forms[0].submit(); }else{ //var lm = Math.floor((examTimeLength - examTime) / 60000); var lh = Math.floor(((examTimeLength - examTime) / 3600) % 60) var lm = Math.floor(((examTimeLength - examTime) / 60) % 60); var ls = (examTimeLength - examTime) % 60; var yh = Math.floor((examTime / 3600) % 60); var ym = Math.floor((examTime / 60) % 60); var ys = examTime % 60; document.getElementById("tTime").innerHTML = "考试已经开始了" + lh + "时" + lm + "分" + ls + "秒" + ",剩余" + yh + "时" + ym + "分" + ys + "秒"; } examTime--; examTimes.innerHTML=examTime; setTimeout(startTime,1000); } var timer=null; //当页面加载后，启动周期性定时器，每过1秒执行startTime window.onload=function(){ startTime(); } </script>