基于SpringBoot+Vue在线考试系统的设计和实现(源码+文档+部署讲解)

@RequestMapping("/homeInfo")
public void homeInfo(HttpServletResponse response) throws IOException {
	logger.info("加载后台首页相关数据");
	
	int examPaperTotal = examPaperInfoService.getExamPpaerTotal();
	int subjectTotal = subjectInfoService.getSubjectTotal();
	int teacherTotal = teacherInfoService.getTeacherTotal();
	int studentTotal = studentInfoService.getStudentTotal();
	
	String json = "{\"examPaperTotal\":"+examPaperTotal+", " +
			"\"subjectTotal\":"+subjectTotal+", " +
			"\"teacherTotal\":"+teacherTotal+", " +
			"\"studentTotal\":"+studentTotal+"}";
	
	response.getWriter().print(json);
}

@RequestMapping(value="/choose", method=RequestMethod.POST)
public void examChooseHandler(
		@RequestParam("studentId") Integer studentId,
		@RequestParam("examPaperId") Integer examPaperId,
		@RequestParam("subjectId") Integer subjectId,
		@RequestParam(value="index", required=false) Integer index,
		@RequestParam("chooseAswer") String chooseAswer,
		HttpServletResponse response) throws IOException {
	logger.info("考生 "+studentId+" 在试卷 "+examPaperId+" 中试题 "+subjectId+" 选择了答案 "+chooseAswer+" 序号 "+index);
	
	//判断该考生是否已经选择过该试题
	Map<String, Object> map = new HashMap<String, Object>();
	map.put("studentId", studentId);
	map.put("examPaperId", examPaperId);
	map.put("subjectId", subjectId);
	examChoose = examChooseInfoService.getChooseWithIds(map);
	logger.info("考生是否选择过试题 "+subjectId+" "+examChoose+" (NULL-否)");
	if (examChoose == null) {
		logger.info("考生 "+studentId+" 尚未选择试题 "+subjectId+" 添加选择记录 答案 "+chooseAswer);
		map.put("chooseResult", chooseAswer);
		/** 添加选择记录 */
		examChooseInfoService.addChoose(map);
	} else if (examChoose.getChooseId() != null && examChoose != null) {
		logger.info("考生 "+studentId+" 已经选择试题 "+subjectId+" 修改选择记录 答案 "+examChoose.getChooseResult()+" 更新为 "+chooseAswer);
		/*
			* 如果选择了和上次相同的答案，则不做修改操作
			* 优化 -- 前台判断选择了相同答案则不发出请求
			*/
		if(!chooseAswer.equals(examChoose.getChooseResult())) {
			examChoose.setChooseResult(chooseAswer);
			/** 当前选择答案和之前选择答案不同 修改答案记录 */
			examChooseInfoService.updateChooseWithIds(examChoose);
		} else {
			logger.info("考生选择了相同答案，不做修改操作");
		}
	} else {
		response.getWriter().print("f");
		return;
	}
	
	response.getWriter().print("t");
}

@RequestMapping("/examCount")
public void getStudentExamCount(@RequestParam("tid") Integer teacherId, HttpServletResponse response) throws IOException {
	if (teacherId == null) {
		response.getWriter().print("TID-NULL");			
	} else {
		//获取当前班主任对应的班级
		ClassInfo classInfo = classInfoService.getClassByTeacherId(teacherId);
		//获取学生考试信息
		List<StudentExamInfo> stuExamInfos = studentExamInfoService.getStudentExamCountByClassId(classInfo.getClassId());
		
		response.getWriter().print(StudentExamInfoCharts.createExamCountBarJson(stuExamInfos));
	}
}