Java 在线考试云平台的实现

考试流程：

• 用户前台注册成为学生
• 管理员后台添加老师，系统将该用户角色上升为老师
• 老师登录，添加考试,添加题目，发布考试
• 考生登录前台参加考试，交卷
• 老师后台批改试卷，查看成绩
• 考试查看成绩

练习流程：

• 考生登录前台参加练习，练习完自动判分，记录错题
• 考生查看成绩，查看错题

用户登录操作业务：

@RestController
@Api(tags = "User APIs")
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @PostMapping("/register")
    @ApiOperation("注册")
    ResultVO<User> register(@RequestBody RegisterDTO registerDTO) {
        ResultVO<User> resultVO;
        // 注册信息的完善，还有唯一性校验没(用户名、邮箱和手机号)已经在user表中通过unique来设置了
        User user = userService.register(registerDTO);
        if (user != null) {
            // 注册成功
            resultVO = new ResultVO<>(ResultEnum.REGISTER_SUCCESS.getCode(), ResultEnum.REGISTER_SUCCESS.getMessage(), user);
        } else {
            resultVO = new ResultVO<>(ResultEnum.REGISTER_FAILED.getCode(), ResultEnum.REGISTER_FAILED.getMessage(), null);
        }
        return resultVO;
    }

    @PostMapping("/login")
    @ApiOperation("根据用户名或邮箱登录,登录成功返回token")
    ResultVO<String> login(@RequestBody LoginQo loginQo) { // 这里不用手机号是因为手机号和用户名难以进行格式区分，而用户名和
        // 用户登录
        ResultVO<String> resultVO;
        String token = userService.login(loginQo);
        if (token != null) {
            // 登录成功
            resultVO = new ResultVO<>(ResultEnum.LOGIN_SUCCESS.getCode(), ResultEnum.LOGIN_SUCCESS.getMessage(), token);
        } else {
            // 登录失败
            resultVO = new ResultVO<>(ResultEnum.LOGIN_FAILED.getCode(), ResultEnum.LOGIN_FAILED.getMessage(), null);
        }
        return resultVO;
    }

    @GetMapping("/user-info")
    @ApiOperation("获取用户信息")
    ResultVO<UserVo> getUserInfo(HttpServletRequest request) {
        String userId = (String) request.getAttribute("user_id");
        UserVo userVo = userService.getUserInfo(userId);
        return new ResultVO<>(ResultEnum.GET_INFO_SUCCESS.getCode(), ResultEnum.GET_INFO_SUCCESS.getMessage(), userVo);
    }

    @GetMapping("/info")
    @ApiOperation("获取用户的详细信息，包括个人信息页面和操作权限")
    ResultVO<UserInfoVo> getInfo(HttpServletRequest request) {
        System.out.println("进入/user/info的获取用户信息的接口");
        String userId = (String) request.getAttribute("user_id");
        UserInfoVo userInfoVo = userService.getInfo(userId);
        return new ResultVO<>(ResultEnum.GET_INFO_SUCCESS.getCode(), ResultEnum.GET_INFO_SUCCESS.getMessage(), userInfoVo);
    }

    @GetMapping("/test")
    @ApiOperation("测试接口")
    String test(HttpServletRequest request) {
        // 下面这两个属性都是登录拦截器从token中解析地，当用户名不对或者token过期时是走不到接口内的
        String userId = (String) request.getAttribute("user_id");
        String username = (String) request.getAttribute("username");
        System.out.println("用户id：" + userId);
        System.out.println("用户名：" + username);
        return "用户id：" + userId + "\n用户名：" + username;
    }
}

问题信息业务操作：

@RestController
@Api(tags = "Exam APIs")
@RequestMapping("/exam")
public class ExamController {
    @Autowired
    private ExamService examService;

    @GetMapping("/question/all")
    @ApiOperation("获取所有问题的列表")
    ResultVO<List<QuestionVo>> getQuestionAll() {
        ResultVO<List<QuestionVo>> resultVO;
        try {
            List<QuestionVo> questionAll = examService.getQuestionAll();
            resultVO = new ResultVO<>(0, "获取全部问题列表成功", questionAll);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取全部问题列表失败", null);
        }
        return resultVO;
    }

    @PostMapping("/question/update")
    @ApiOperation("更新问题")
    ResultVO<QuestionVo> questionUpdate(@RequestBody QuestionVo questionVo) {
        // 完成问题的更新
        System.out.println(questionVo);
        try {
            QuestionVo questionVoResult = examService.updateQuestion(questionVo);
            return new ResultVO<>(0, "更新问题成功", questionVoResult);
        } catch (Exception e) {
            e.printStackTrace();
            return new ResultVO<>(-1, "更新问题失败", null);
        }
    }

    @PostMapping("/question/create")
    @ApiOperation("创建问题")
    ResultVO<String> questionCreate(@RequestBody QuestionCreateSimplifyVo questionCreateSimplifyVo, HttpServletRequest request) {
        QuestionCreateVo questionCreateVo = new QuestionCreateVo();
        // 把能拷贝过来的属性都拷贝过来
        BeanUtils.copyProperties(questionCreateSimplifyVo, questionCreateVo);
        // 设置创建者信息
        String userId = (String) request.getAttribute("user_id");
        questionCreateVo.setQuestionCreatorId(userId);
        System.out.println(questionCreateVo);
        try {
            examService.questionCreate(questionCreateVo);
            return new ResultVO<>(0, "问题创建成功", null);
        } catch (Exception e) {
            e.printStackTrace();
            return new ResultVO<>(-1, "创建问题失败", null);
        }
    }

    @GetMapping("/question/selection")
    @ApiOperation("获取问题分类的相关选项")
    ResultVO<QuestionSelectionVo> getSelections() {
        QuestionSelectionVo questionSelectionVo = examService.getSelections();
        if (questionSelectionVo != null) {
            return new ResultVO<>(0, "获取问题分类选项成功", questionSelectionVo);
        } else {
            return new ResultVO<>(-1, "获取问题分类选项失败", null);
        }
    }

    @GetMapping("/question/detail/{id}")
    @ApiOperation("根据问题的id获取问题的详细信息")
    ResultVO<QuestionDetailVo> getQuestionDetail(@PathVariable String id) {
        //  根据问题id获取问题的详细信息
        System.out.println(id);
        ResultVO<QuestionDetailVo> resultVO;
        try {
            QuestionDetailVo questionDetailVo = examService.getQuestionDetail(id);
            resultVO = new ResultVO<>(0, "获取问题详情成功", questionDetailVo);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取问题详情失败", null);
        }
        return resultVO;
    }

    @GetMapping("/all")
    @ApiOperation("获取全部考试的列表")
    ResultVO<List<ExamVo>> getExamAll() {
        // 需要拼接前端需要的考试列表对象
        ResultVO<List<ExamVo>> resultVO;
        try {
            List<ExamVo> examVos = examService.getExamAll();
            resultVO = new ResultVO<>(0, "获取全部考试的列表成功", examVos);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取全部考试的列表失败", null);
        }
        return resultVO;
    }

    @GetMapping("/question/type/list")
    @ApiOperation("获取问题列表，按照单选、多选和判断题分类返回")
    ResultVO<ExamQuestionTypeVo> getExamQuestionTypeList() {
        // 获取问题的分类列表
        ResultVO<ExamQuestionTypeVo> resultVO;
        try {
            ExamQuestionTypeVo examQuestionTypeVo = examService.getExamQuestionType();
            resultVO = new ResultVO<>(0, "获取问题列表成功", examQuestionTypeVo);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取问题列表失败", null);
        }
        return resultVO;
    }

    @PostMapping("/create")
    @ApiOperation("创建考试")
    ResultVO<Exam> createExam(@RequestBody ExamCreateVo examCreateVo, HttpServletRequest request) {
        // 从前端传参数过来，在这里完成考试的入库
        ResultVO<Exam> resultVO;
        String userId = (String) request.getAttribute("user_id");
        try {
            Exam exam = examService.create(examCreateVo, userId);
            resultVO = new ResultVO<>(0, "创建考试成功", exam);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "创建考试失败", null);
        }
        return resultVO;
    }

    @PostMapping("/update")
    @ApiOperation("更新考试")
    ResultVO<Exam> updateExam(@RequestBody ExamVo examVo, HttpServletRequest request) {
        // 从前端传参数过来，在这里完成考试的入库
        ResultVO<Exam> resultVO;
        String userId = (String) request.getAttribute("user_id");
        try {
            Exam exam = examService.update(examVo, userId);
            resultVO = new ResultVO<>(0, "更新考试成功", exam);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "更新考试失败", null);
        }
        return resultVO;
    }

    @GetMapping("/card/list")
    @ApiOperation("获取考试列表，适配前端卡片列表")
    ResultVO<List<ExamCardVo>> getExamCardList() {
        // 获取考试列表卡片
        ResultVO<List<ExamCardVo>> resultVO;
        try {
            List<ExamCardVo> examCardVoList = examService.getExamCardList();
            resultVO = new ResultVO<>(0, "获取考试列表卡片成功", examCardVoList);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取考试列表卡片失败", null);
        }
        return resultVO;
    }

    @GetMapping("/detail/{id}")
    @ApiOperation("根据考试的id，获取考试详情")
    ResultVO<ExamDetailVo> getExamDetail(@PathVariable String id) {
        // 根据id获取考试详情
        ResultVO<ExamDetailVo> resultVO;
        try {
            ExamDetailVo examDetail = examService.getExamDetail(id);
            resultVO = new ResultVO<>(0, "获取考试详情成功", examDetail);
        } catch (Exception e) {
            resultVO = new ResultVO<>(-1, "获取考试详情失败", null);
        }
        return resultVO;
    }

    @PostMapping("/finish/{examId}")
    @ApiOperation("根据用户提交的答案对指定id的考试判分")
    ResultVO<ExamRecord> finishExam(@PathVariable String examId, @RequestBody HashMap<String, List<String>> answersMap, HttpServletRequest request) {
        ResultVO<ExamRecord> resultVO;
        try {
            // 拦截器里设置上的用户id
            String userId = (String) request.getAttribute("user_id");
            // 下面根据用户提交的信息进行判分,返回用户的得分情况
            ExamRecord examRecord = examService.judge(userId, examId, answersMap);
            resultVO = new ResultVO<>(0, "考卷提交成功", examRecord);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "考卷提交失败", null);
        }
        return resultVO;
    }

    @GetMapping("/record/list")
    @ApiOperation("获取当前用户的考试记录")
    ResultVO<List<ExamRecordVo>> getExamRecordList(HttpServletRequest request) {
        ResultVO<List<ExamRecordVo>> resultVO;
        try {
            // 拦截器里设置上的用户id
            String userId = (String) request.getAttribute("user_id");
            // 下面根据用户账号拿到他(她所有的考试信息)，注意要用VO封装下
            List<ExamRecordVo> examRecordVoList = examService.getExamRecordList(userId);
            resultVO = new ResultVO<>(0, "获取考试记录成功", examRecordVoList);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取考试记录失败", null);
        }
        return resultVO;
    }

    @GetMapping("/record/detail/{recordId}")
    @ApiOperation("根据考试记录id获取考试记录详情")
    ResultVO<RecordDetailVo> getExamRecordDetail(@PathVariable String recordId) {
        ResultVO<RecordDetailVo> resultVO;
        try {
            RecordDetailVo recordDetailVo = examService.getRecordDetail(recordId);
            resultVO = new ResultVO<>(0, "获取考试记录详情成功", recordDetailVo);
        } catch (Exception e) {
            e.printStackTrace();
            resultVO = new ResultVO<>(-1, "获取考试记录详情失败", null);
        }
        return resultVO;
    }
}

文件上传业务控制器：

/***********************************************************
 * @note      : 文件上传下载的接口,由于Swagger的问题导致在SwaggerUI
 *              里测试不成功，实际上前端是完全没有问题的
 *  * 为了支持Ajax请求和响应，最简单的解决方案返回一个ResponseEntity。
 *  * 以下示例演示了上传文件的三种可能方式：
 *  * 1. 单文件上传 - `MultipartFile`
 *  * 2. 多文件上传 - `MultipartFile []`
 *  * 3. 将文件上传到模型 - `@ModelAttribute`
@RestController
@Api(tags = "Upload And Download APIs")
@RequestMapping("/file")
@Slf4j
public class UploadDownloadController {

//    @Autowired
//    AITestConfig aiTestConfig;
//
//    @PostMapping("/upload/single")
//    @ApiOperation("单文件上传")
//    public String uploadFile(@RequestParam("file") MultipartFile uploadfile) {
//        return FileTransUtil.uploadFile(uploadfile, "/root/" + File.separator + uploadfile.getOriginalFilename());
//    }

    @ApiOperation("单文件上传,支持同时传入参数")
    @PostMapping("/api/upload/singleAndparas")
    public String uploadFileSingle(@RequestParam("dir") String dir, @RequestParam("file") MultipartFile uploadfile) {
        return FileTransUtil.uploadFile(uploadfile, dir);
    }

    @ApiOperation("单文件上传,支持同时传入参数,Model")
    @PostMapping("/upload/single/model")
    public String singleUploadFileModel(@ModelAttribute("model") UploadModel2 model) {
        return FileTransUtil.uploadFile(model.getFile(), model.getDir());
    }

    @ApiOperation("多文件上传,支持同时传入参数")
    @PostMapping("upload/multiAndparas")
    public String uploadFileMulti(@RequestParam("dir") String dir, @RequestParam("files") MultipartFile[] uploadfiles) {
        return FileTransUtil.uploadFiles(uploadfiles, dir);
    }

    @ApiOperation("多文件上传,支持同时传入参数")
    @PostMapping(value = "/upload/multi/model")
    public String multiUploadFileModel(@ModelAttribute(("model")) UploadModel model) {
        return FileTransUtil.uploadFiles(model.getFiles(), model.getDir());
    }

    @ApiOperation("Get下载文件")
    @GetMapping(value = "/download/get")
    public ResponseEntity<InputStreamResource> downloadFileGet(@RequestParam String filePath) throws IOException {
        return FileTransUtil.downloadFile(filePath);
    }

    @ApiOperation("Post下载文件")
    @PostMapping(value = "/download/post")
    public ResponseEntity<InputStreamResource> downloadFilePost(@RequestBody DownloadQo downloadQo) throws IOException {
        return FileTransUtil.downloadFile(downloadQo.getPath());
    }
}

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