feat: add exam settings and platform question bank APIs

docs/sql/2026-09-22-exam-settings.sql

@@ -0,0 +1,7 @@
+-- 考试设置扩展。执行前请确认目标数据库与备份策略。
+ALTER TABLE exam_assessment
+  ADD COLUMN question_order_mode varchar(16) NOT NULL DEFAULT 'FIXED' AFTER allow_rollback,
+  ADD COLUMN option_order_mode varchar(16) NOT NULL DEFAULT 'FIXED' AFTER question_order_mode,
+  ADD COLUMN allow_copy_question bit NOT NULL DEFAULT 0 AFTER option_order_mode,
+  ADD COLUMN allow_paste_answer bit NOT NULL DEFAULT 0 AFTER allow_copy_question,
+  ADD COLUMN multiple_score_mode varchar(32) NOT NULL DEFAULT 'ALL_OR_NOTHING' AFTER allow_paste_answer;

docs/sql/2026-09-22-platform-question-bank.sql

@@ -0,0 +1,11 @@
+-- Platform question bank extension. Execute after 2026-09-15-exam.sql.
+-- Existing teacher questions remain usable and are classified as TEACHER.
+ALTER TABLE exam_question
+  ADD COLUMN source_type varchar(16) NOT NULL DEFAULT 'TEACHER' COMMENT '题目来源：PLATFORM/TEACHER',
+  ADD COLUMN task_key varchar(128) NULL COMMENT '归属实训任务，关联 training_task.task_key';
+
+UPDATE exam_question SET source_type='TEACHER' WHERE source_type IS NULL OR source_type='';
+
+ALTER TABLE exam_question
+  ADD KEY idx_exam_question_source_task (source_type, task_key),
+  ADD KEY idx_exam_question_task (task_key);

src/main/java/com/sztzjy/linkCommerce/controller/platformadmin/PlatformAdminController.java

@@ -10,6 +10,8 @@ import com.sztzjy.linkCommerce.service.PlatformAdminService;
 import com.sztzjy.linkCommerce.service.SchoolDefaultTaskService;
 import com.sztzjy.linkCommerce.service.SchoolProductConfigService;
 import com.sztzjy.linkCommerce.service.UserInfoService;
+import com.sztzjy.linkCommerce.service.PlatformQuestionBankService;
+import com.sztzjy.linkCommerce.service.ExamService;
 import com.sztzjy.linkCommerce.util.ResultEntity;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
@@ -22,6 +24,8 @@ import javax.servlet.http.HttpServletRequest;
 import java.util.Date;
 import java.util.List;
 import java.util.UUID;
+import java.util.Map;
+import org.springframework.web.multipart.MultipartFile;
 
 @Api(tags = "平台超管管理")
 @RequestMapping("api/platform-admin")
@@ -47,6 +51,71 @@ public class PlatformAdminController {
     private UserinfoMapper userinfoMapper;
     @Autowired
     private TaskAllocationMapper taskAllocationMapper;
+    @Autowired
+    private PlatformQuestionBankService platformQuestionBankService;
+    @Autowired
+    private ExamService examService;
+
+    @GetMapping("/question-bank/projects")
+    public ResultEntity<List<Map<String, Object>>> questionBankProjects(HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "查询成功", platformQuestionBankService.projects(currentUser(request)));
+    }
+
+    @GetMapping("/question-bank")
+    public ResultEntity<List<Map<String, Object>>> questionBank(@RequestParam(required = false) String type,
+                                                                  @RequestParam(required = false) String taskKey,
+                                                                  @RequestParam(required = false) String keyword,
+                                                                  HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "查询成功", platformQuestionBankService.list(currentUser(request), type, taskKey, keyword));
+    }
+
+    @GetMapping("/question-bank/{id}")
+    public ResultEntity<Map<String, Object>> questionBankDetail(@PathVariable long id, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "查询成功", platformQuestionBankService.get(currentUser(request), id));
+    }
+
+    @PostMapping("/question-bank")
+    public ResultEntity<Map<String, Object>> addQuestionBank(@RequestBody Map<String, Object> payload, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "保存成功", platformQuestionBankService.save(currentUser(request), null, payload));
+    }
+
+    @PutMapping("/question-bank/{id}")
+    public ResultEntity<Map<String, Object>> updateQuestionBank(@PathVariable long id, @RequestBody Map<String, Object> payload, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "保存成功", platformQuestionBankService.save(currentUser(request), id, payload));
+    }
+
+    @DeleteMapping("/question-bank/{id}")
+    public ResultEntity<Void> deleteQuestionBank(@PathVariable long id, HttpServletRequest request) {
+        platformQuestionBankService.delete(currentUser(request), id); return new ResultEntity<>(HttpStatus.OK, "删除成功");
+    }
+
+    @PostMapping("/question-bank/import")
+    public ResultEntity<List<Map<String, Object>>> importQuestionBank(@RequestPart("file") MultipartFile file,
+                                                                       @RequestParam String taskKey, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "导入成功", platformQuestionBankService.importExcel(currentUser(request), file, taskKey));
+    }
+
+    @GetMapping("/question-bank/template")
+    public void questionBankTemplate(@RequestParam(required = false, defaultValue = "word") String format,
+                                     HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws java.io.IOException {
+        platformAdminService.requirePlatformAdmin(currentUser(request));
+        examService.questionTemplate(format, response);
+    }
+
+    @PostMapping("/question-bank/attachment")
+    public ResultEntity<Map<String, Object>> questionBankAttachment(@RequestPart("file") MultipartFile file, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "上传成功", platformQuestionBankService.uploadAttachment(currentUser(request), file));
+    }
+
+    @PostMapping("/question-bank/ai/preview")
+    public ResultEntity<Map<String, Object>> questionBankAiPreview(@RequestBody Map<String, Object> payload, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "生成成功", platformQuestionBankService.aiPreview(currentUser(request), payload));
+    }
+
+    @PostMapping("/question-bank/ai/confirm")
+    public ResultEntity<List<Map<String, Object>>> questionBankAiConfirm(@RequestBody Map<String, Object> payload, HttpServletRequest request) {
+        return new ResultEntity<>(HttpStatus.OK, "保存成功", platformQuestionBankService.aiConfirm(currentUser(request), payload));
+    }
 
     @GetMapping("/schools")
     @ApiOperation("平台超管-学校列表")
@@ -224,6 +293,10 @@ public class PlatformAdminController {
         platformAdminService.requirePlatformAdmin(user);
     }
 
+    private JwtUser currentUser(HttpServletRequest request) {
+        return TokenProvider.getJWTUser(request);
+    }
+
     private School requireSchool(String schoolId) {
         if (StringUtils.isBlank(schoolId)) {
             throw new IllegalArgumentException("学校ID不能为空");

src/main/java/com/sztzjy/linkCommerce/controller/stu/ExamController.java

@@ -32,9 +32,15 @@ public class ExamController {
 
     @GetMapping("/teacher/questions")
     public ResultEntity<List<Map<String, Object>>> questions(@RequestParam(required = false) String type,
+                                                              @RequestParam(required = false) String taskKey,
                                                               @RequestParam(required = false) String keyword,
                                                               HttpServletRequest request) {
-        return ok(examService.questions(user(request), type, keyword));
+        return ok(examService.questions(user(request), type, taskKey, keyword));
+    }
+
+    @GetMapping("/teacher/question-projects")
+    public ResultEntity<List<Map<String, Object>>> questionProjects(HttpServletRequest request) {
+        return ok(examService.questionProjects(user(request)));
     }
 
     @PostMapping("/teacher/questions")

src/main/java/com/sztzjy/linkCommerce/service/ExamService.java

@@ -43,6 +43,13 @@ public class ExamService {
     public static final String MULTIPLE = "MULTIPLE";
     public static final String TRUE_FALSE = "TRUE_FALSE";
     public static final String SHORT_ANSWER = "SHORT_ANSWER";
+    private static final String FIXED_ORDER = "FIXED";
+    private static final String RANDOM_ORDER = "RANDOM";
+    private static final String ALL_OR_NOTHING = "ALL_OR_NOTHING";
+    private static final String PARTIAL_BY_COUNT = "PARTIAL_BY_COUNT";
+    private static final String HALF_FOR_PARTIAL = "HALF_FOR_PARTIAL";
+    private static final Set<String> ORDER_MODES = new HashSet<>(Arrays.asList(FIXED_ORDER, RANDOM_ORDER));
+    private static final Set<String> MULTIPLE_SCORE_MODES = new HashSet<>(Arrays.asList(ALL_OR_NOTHING, PARTIAL_BY_COUNT, HALF_FOR_PARTIAL));
     private static final Set<String> TYPES = new LinkedHashSet<>(Arrays.asList(SINGLE, MULTIPLE, TRUE_FALSE, SHORT_ANSWER));
     private static final Set<String> ALLOWED_ATTACHMENTS = new HashSet<>(Arrays.asList("pdf", "doc", "docx", "png", "jpg", "jpeg"));
     private static final long MAX_ATTACHMENT_SIZE = 20L * 1024 * 1024;
@@ -67,22 +74,33 @@ public class ExamService {
                 (rs, n) -> map("id", rs.getString("id"), "name", rs.getString("name")), teacher.getUserId());
     }
 
-    public List<Map<String, Object>> questions(JwtUser teacher, String type, String keyword) {
+    public List<Map<String, Object>> questions(JwtUser teacher, String type, String taskKey, String keyword) {
         requireTeacher(teacher);
-        StringBuilder sql = new StringBuilder("select * from exam_question where teacher_id=?");
+        StringBuilder sql = new StringBuilder("select q.*,t.project_name,t.task_name from exam_question q left join training_task t on t.task_key=q.task_key where (q.source_type='PLATFORM' or (q.source_type='TEACHER' and q.teacher_id=?))");
         List<Object> args = new ArrayList<>();
         args.add(teacher.getUserId());
-        if (StringUtils.isNotBlank(type)) { validateType(type); sql.append(" and question_type=?"); args.add(type); }
-        if (StringUtils.isNotBlank(keyword)) { sql.append(" and stem like ?"); args.add("%" + keyword.trim() + "%"); }
-        sql.append(" order by update_time desc, id desc");
+        if (StringUtils.isNotBlank(type)) { validateType(type); sql.append(" and q.question_type=?"); args.add(type); }
+        if (StringUtils.isNotBlank(taskKey)) { sql.append(" and q.task_key=?"); args.add(taskKey); }
+        if (StringUtils.isNotBlank(keyword)) { sql.append(" and q.stem like ?"); args.add("%" + keyword.trim() + "%"); }
+        sql.append(" order by q.update_time desc, q.id desc");
         return jdbc.query(sql.toString(), (rs, n) -> questionRow(rs, true), args.toArray());
     }
 
+    public List<Map<String, Object>> questions(JwtUser teacher, String type, String keyword) {
+        return questions(teacher, type, null, keyword);
+    }
+
+    public List<Map<String, Object>> questionProjects(JwtUser teacher) {
+        requireTeacher(teacher);
+        return jdbc.query("select task_key,project_name,task_name from training_task where enabled is null or enabled=1 order by sort,project_name,task_name",
+                (rs, n) -> map("taskKey", rs.getString("task_key"), "projectName", rs.getString("project_name"), "taskName", rs.getString("task_name")));
+    }
+
     public Map<String, Object> createQuestion(JwtUser teacher, Map<String, Object> payload) {
         requireTeacher(teacher);
         QuestionData q = validateQuestion(payload);
-        jdbc.update("insert into exam_question(school_id,teacher_id,question_type,stem,options_json,answer_json,answer_analysis,attachment_name,attachment_url) values(?,?,?,?,?,?,?,?,?)",
-                teacher.getSchoolId(), teacher.getUserId(), q.type, q.stem, json(q.options), json(q.answer), q.analysis,
+        jdbc.update("insert into exam_question(school_id,teacher_id,source_type,task_key,question_type,stem,options_json,answer_json,answer_analysis,attachment_name,attachment_url) values(?,?,?,?,?,?,?,?,?,?,?)",
+                teacher.getSchoolId(), teacher.getUserId(), "TEACHER", text(payload.get("taskKey")), q.type, q.stem, json(q.options), json(q.answer), q.analysis,
                 text(payload.get("attachmentName")), text(payload.get("attachmentUrl")));
         Long id = jdbc.queryForObject("select last_insert_id()", Long.class);
         return getOwnedQuestion(teacher, id);
@@ -90,18 +108,20 @@ public class ExamService {
 
     public Map<String, Object> updateQuestion(JwtUser teacher, long id, Map<String, Object> payload) {
         requireTeacher(teacher);
-        getOwnedQuestion(teacher, id);
+        Map<String, Object> existing = getOwnedQuestion(teacher, id);
+        if ("PLATFORM".equals(existing.get("sourceType"))) throw new AccessDeniedException("平台题库题目只读");
         QuestionData q = validateQuestion(payload);
-        jdbc.update("update exam_question set question_type=?,stem=?,options_json=?,answer_json=?,answer_analysis=?,attachment_name=?,attachment_url=? where id=? and teacher_id=?",
-                q.type, q.stem, json(q.options), json(q.answer), q.analysis,
+        jdbc.update("update exam_question set task_key=?,question_type=?,stem=?,options_json=?,answer_json=?,answer_analysis=?,attachment_name=?,attachment_url=? where id=? and teacher_id=? and source_type='TEACHER'",
+                text(payload.get("taskKey")), q.type, q.stem, json(q.options), json(q.answer), q.analysis,
                 text(payload.get("attachmentName")), text(payload.get("attachmentUrl")), id, teacher.getUserId());
         return getOwnedQuestion(teacher, id);
     }
 
     public void deleteQuestion(JwtUser teacher, long id) {
         requireTeacher(teacher);
-        getOwnedQuestion(teacher, id);
-        jdbc.update("delete from exam_question where id=? and teacher_id=?", id, teacher.getUserId());
+        Map<String, Object> existing = getOwnedQuestion(teacher, id);
+        if ("PLATFORM".equals(existing.get("sourceType"))) throw new AccessDeniedException("平台题库题目只读");
+        jdbc.update("delete from exam_question where id=? and teacher_id=? and source_type='TEACHER'", id, teacher.getUserId());
     }
 
     public Map<String, Object> uploadQuestionAttachment(JwtUser teacher, MultipartFile file) {
@@ -263,13 +283,18 @@ public class ExamService {
                 id == null ? new Object[]{teacher.getSchoolId(), name} : new Object[]{teacher.getSchoolId(), name, id});
         if (duplicate > 0) throw new IllegalArgumentException("考试名称已存在");
         boolean allowRollback = bool(payload.get("allowRollback"), true);
+        String questionOrderMode = enumValue(payload.get("questionOrderMode"), FIXED_ORDER, ORDER_MODES, "题目乱序方式无效");
+        String optionOrderMode = enumValue(payload.get("optionOrderMode"), FIXED_ORDER, ORDER_MODES, "选项乱序方式无效");
+        boolean allowCopyQuestion = bool(payload.get("allowCopyQuestion"), false);
+        boolean allowPasteAnswer = bool(payload.get("allowPasteAnswer"), false);
+        String multipleScoreMode = enumValue(payload.get("multipleScoreMode"), ALL_OR_NOTHING, MULTIPLE_SCORE_MODES, "多选题计分方式无效");
         long examId;
         if (id == null) {
-            jdbc.update("insert into exam_assessment(school_id,teacher_id,exam_name,start_time,end_time,allow_rollback) values(?,?,?,?,?,?)",
-                    teacher.getSchoolId(), teacher.getUserId(), name, start, end, allowRollback);
+            jdbc.update("insert into exam_assessment(school_id,teacher_id,exam_name,start_time,end_time,allow_rollback,question_order_mode,option_order_mode,allow_copy_question,allow_paste_answer,multiple_score_mode) values(?,?,?,?,?,?,?,?,?,?,?)",
+                    teacher.getSchoolId(), teacher.getUserId(), name, start, end, allowRollback, questionOrderMode, optionOrderMode, allowCopyQuestion, allowPasteAnswer, multipleScoreMode);
             examId = jdbc.queryForObject("select last_insert_id()", Long.class);
         } else {
-            jdbc.update("update exam_assessment set exam_name=?,start_time=?,end_time=?,allow_rollback=? where id=?", name, start, end, allowRollback, id);
+            jdbc.update("update exam_assessment set exam_name=?,start_time=?,end_time=?,allow_rollback=?,question_order_mode=?,option_order_mode=?,allow_copy_question=?,allow_paste_answer=?,multiple_score_mode=? where id=?", name, start, end, allowRollback, questionOrderMode, optionOrderMode, allowCopyQuestion, allowPasteAnswer, multipleScoreMode, id);
             jdbc.update("delete from exam_assessment_class where exam_id=?", id);
             jdbc.update("delete from exam_assessment_question where exam_id=?", id);
             examId = id;
@@ -440,7 +465,10 @@ public class ExamService {
 
     public List<Map<String, Object>> studentExams(JwtUser student) {
         requireStudent(student); autoSubmitExpired();
-        return jdbc.query("select distinct e.*,a.id attempt_id,a.attempt_status,a.total_score from exam_assessment e " +
+        return jdbc.query("select distinct e.*,a.id attempt_id,a.attempt_status,a.total_score," +
+                        "(select u.name from userinfo u where u.user_id=e.teacher_id collate utf8mb4_general_ci limit 1) teacher_name," +
+                        "(select group_concat(distinct s.class_name order by s.class_name separator '、') from exam_assessment_class ec join school_class s on s.school_class_id=ec.teaching_class_id collate utf8mb4_0900_ai_ci where ec.exam_id=e.id) class_names " +
+                        "from exam_assessment e " +
                         "join exam_assessment_class c on c.exam_id=e.id join teaching_class_student t on t.teaching_class_id=c.teaching_class_id and t.status='IN_PROGRESS' " +
                         "left join exam_attempt a on a.exam_id=e.id and a.student_id=? where t.student_user_id=? and e.publication_status='PUBLISHED' order by e.start_time desc",
                 (rs, n) -> { Map<String, Object> m = examSummary(rs); m.put("attemptId", rs.getObject("attempt_id")); m.put("attemptStatus", rs.getString("attempt_status"));
@@ -480,13 +508,27 @@ public class ExamService {
         if (!"IN_PROGRESS".equals(exam.get("status"))) throw new IllegalArgumentException("考试已结束，不能继续作答");
         long attemptId = requireAttempt(student, examId, deviceToken, true);
         Map<String, Object> question = examQuestion(examId, questionId, true);
-        Boolean correct = SHORT_ANSWER.equals(question.get("type")) ? null : answersEqual(question.get("answer"), answer);
-        BigDecimal score = correct == null ? null : (correct ? decimal(question.get("score")) : BigDecimal.ZERO);
+        String type = String.valueOf(question.get("type"));
+        Boolean correct = SHORT_ANSWER.equals(type) ? null : answersEqual(question.get("answer"), answer);
+        BigDecimal score = SHORT_ANSWER.equals(type) ? null : objectiveScore(exam, question, answer);
         jdbc.update("insert into exam_attempt_answer(attempt_id,question_id,answer_json,is_correct,awarded_score) values(?,?,?,?,?) " +
                         "on duplicate key update answer_json=values(answer_json),is_correct=values(is_correct),awarded_score=values(awarded_score)",
                 attemptId, questionId, json(answer), correct, score);
     }
 
+    private BigDecimal objectiveScore(Map<String, Object> exam, Map<String, Object> question, Object answer) {
+        BigDecimal full = decimal(question.get("score"));
+        if (!MULTIPLE.equals(question.get("type"))) return answersEqual(question.get("answer"), answer) ? full : BigDecimal.ZERO;
+        Set<String> expected = toSet(question.get("answer"));
+        Set<String> actual = toSet(answer);
+        if (expected.isEmpty() || actual.isEmpty() || !expected.containsAll(actual)) return BigDecimal.ZERO;
+        if (expected.equals(actual)) return full;
+        String mode = String.valueOf(exam.getOrDefault("multipleScoreMode", ALL_OR_NOTHING));
+        if (PARTIAL_BY_COUNT.equals(mode)) return full.multiply(BigDecimal.valueOf(actual.size())).divide(BigDecimal.valueOf(expected.size()), 2, BigDecimal.ROUND_HALF_UP);
+        if (HALF_FOR_PARTIAL.equals(mode)) return full.divide(BigDecimal.valueOf(2), 2, BigDecimal.ROUND_HALF_UP);
+        return BigDecimal.ZERO;
+    }
+
     public Map<String, Object> uploadAnswerFile(JwtUser student, long examId, long questionId, String deviceToken, MultipartFile file) {
         requireStudent(student); validateAttachment(file);
         Map<String, Object> exam = accessibleStudentExam(student, examId);
@@ -561,6 +603,7 @@ public class ExamService {
 
     private List<Map<String, Object>> answeredQuestions(long examId, long attemptId, boolean revealAnswer) {
         List<Map<String, Object>> questions = examQuestions(examId, revealAnswer);
+        if (!revealAnswer) applyStudentOrdering(examId, attemptId, questions);
         Map<Long, Map<String, Object>> answers = jdbc.query("select * from exam_attempt_answer where attempt_id=?", (rs, n) -> {
             Map<String, Object> m = map("questionId", rs.getLong("question_id"), "studentAnswer", parse(rs.getString("answer_json")),
                     "correct", rs.getObject("is_correct") == null ? null : rs.getBoolean("is_correct"), "awardedScore", rs.getBigDecimal("awarded_score"),
@@ -570,6 +613,32 @@ public class ExamService {
         return questions;
     }
 
+    private void applyStudentOrdering(long examId, long attemptId, List<Map<String, Object>> questions) {
+        Map<String, Object> exam = jdbc.queryForMap("select question_order_mode,option_order_mode from exam_assessment where id=?", examId);
+        String questionMode = String.valueOf(exam.getOrDefault("question_order_mode", FIXED_ORDER));
+        String optionMode = String.valueOf(exam.getOrDefault("option_order_mode", FIXED_ORDER));
+        if (RANDOM_ORDER.equals(questionMode)) {
+            Map<String, List<Map<String, Object>>> groups = new LinkedHashMap<>();
+            for (Map<String, Object> question : questions) groups.computeIfAbsent(String.valueOf(question.get("type")), key -> new ArrayList<>()).add(question);
+            List<Map<String, Object>> reordered = new ArrayList<>();
+            for (List<Map<String, Object>> group : groups.values()) {
+                Collections.shuffle(group, new Random(attemptId * 31L + group.hashCode()));
+                reordered.addAll(group);
+            }
+            questions.clear(); questions.addAll(reordered);
+            for (int i = 0; i < questions.size(); i++) questions.get(i).put("order", i + 1);
+        }
+        if (RANDOM_ORDER.equals(optionMode)) {
+            for (Map<String, Object> question : questions) {
+                List<Map<String, Object>> options = mapList(question.get("options"));
+                if (options.size() > 1) {
+                    Collections.shuffle(options, new Random(attemptId * 131L + ((Number) question.get("id")).longValue()));
+                    question.put("options", options);
+                }
+            }
+        }
+    }
+
     private List<Map<String, Object>> examQuestions(long examId, boolean revealAnswer) {
         return jdbc.query("select p.question_id id,p.question_type,p.stem,p.options_json,p.answer_json,p.answer_analysis,p.attachment_name,p.attachment_url,p.create_time,p.update_time,p.question_score,p.question_order " +
                         "from exam_assessment_question p where p.exam_id=? order by p.question_order",
@@ -583,7 +652,7 @@ public class ExamService {
     }
 
     private Map<String, Object> getOwnedQuestion(JwtUser teacher, long id) {
-        List<Map<String, Object>> rows = jdbc.query("select * from exam_question where id=? and teacher_id=?", (rs, n) -> questionRow(rs, true), id, teacher.getUserId());
+        List<Map<String, Object>> rows = jdbc.query("select q.*,t.project_name,t.task_name from exam_question q left join training_task t on t.task_key=q.task_key where q.id=? and (q.source_type='PLATFORM' or (q.source_type='TEACHER' and q.teacher_id=?))", (rs, n) -> questionRow(rs, true), id, teacher.getUserId());
         if (rows.isEmpty()) throw new IllegalArgumentException("题目不存在或无权访问");
         return rows.get(0);
     }
@@ -630,6 +699,14 @@ public class ExamService {
                 "startTime", start, "endTime", end, "durationMinutes", Math.max(0, (end.getTime() - start.getTime()) / 60000),
                 "publicationStatus", publication, "status", status(publication, start, end), "allowRollback", rs.getBoolean("allow_rollback"),
                 "exportedAt", getQuiet(rs, "exported_at"), "totalScore", getQuiet(rs, "total_score"));
+        putQuiet(rs, m, "question_order_mode", "questionOrderMode");
+        putQuiet(rs, m, "option_order_mode", "optionOrderMode");
+        Object copyQuestion = getQuiet(rs, "allow_copy_question"); if (copyQuestion != null) m.put("allowCopyQuestion", copyQuestion instanceof Boolean ? copyQuestion : rsBoolean(copyQuestion));
+        Object pasteAnswer = getQuiet(rs, "allow_paste_answer"); if (pasteAnswer != null) m.put("allowPasteAnswer", pasteAnswer instanceof Boolean ? pasteAnswer : rsBoolean(pasteAnswer));
+        putQuiet(rs, m, "multiple_score_mode", "multipleScoreMode");
+        m.putIfAbsent("questionOrderMode", FIXED_ORDER); m.putIfAbsent("optionOrderMode", FIXED_ORDER);
+        m.putIfAbsent("allowCopyQuestion", false); m.putIfAbsent("allowPasteAnswer", false); m.putIfAbsent("multipleScoreMode", ALL_OR_NOTHING);
+        putQuiet(rs, m, "teacher_name", "teacherName"); putQuiet(rs, m, "class_names", "classNames");
         putQuiet(rs, m, "class_count", "classCount"); putQuiet(rs, m, "question_count", "questionCount");
         return m;
     }
@@ -666,6 +743,8 @@ public class ExamService {
                 "options", parse(rs.getString("options_json")), "analysis", revealAnswer ? rs.getString("answer_analysis") : null,
                 "attachmentName", rs.getString("attachment_name"), "attachmentUrl", rs.getString("attachment_url"),
                 "createdAt", rs.getTimestamp("create_time"), "updatedAt", rs.getTimestamp("update_time"));
+        putQuiet(rs, q, "source_type", "sourceType"); putQuiet(rs, q, "task_key", "taskKey");
+        putQuiet(rs, q, "project_name", "projectName"); putQuiet(rs, q, "task_name", "taskName");
         if (revealAnswer) q.put("answer", parse(rs.getString("answer_json")));
         return q;
     }
@@ -1099,12 +1178,22 @@ public class ExamService {
     private static Number number(Object value) { if (value instanceof Number) return (Number) value; try { return Long.parseLong(text(value)); } catch (Exception e) { throw new IllegalArgumentException("数字参数格式错误"); } }
     private static BigDecimal decimal(Object value) { if (value == null || text(value).isEmpty()) return BigDecimal.ZERO; return value instanceof BigDecimal ? (BigDecimal) value : new BigDecimal(text(value)); }
     private static boolean bool(Object value, boolean fallback) { return value == null ? fallback : Boolean.parseBoolean(text(value)); }
+    private static String enumValue(Object value, String fallback, Set<String> allowed, String message) {
+        String normalized = StringUtils.defaultIfBlank(text(value), fallback).trim().toUpperCase(Locale.ROOT);
+        if (!allowed.contains(normalized)) throw new IllegalArgumentException(message);
+        return normalized;
+    }
     private static Timestamp parseTime(Object value) { try { String s = text(value).replace('T', ' '); if (s.length() == 16) s += ":00"; return Timestamp.valueOf(LocalDateTime.parse(s, TIME)); } catch (Exception e) { throw new IllegalArgumentException("考试时间格式不正确"); } }
     private String json(Object value) { try { return objectMapper.writeValueAsString(value); } catch (Exception e) { throw new IllegalArgumentException("数据格式错误"); } }
     private Object parse(String value) { if (StringUtils.isBlank(value)) return null; try { return objectMapper.readValue(value, Object.class); } catch (Exception e) { return value; } }
     private List<Map<String, Object>> mapList(Object value) { if (value == null) return new ArrayList<>(); return objectMapper.convertValue(value, new TypeReference<List<Map<String, Object>>>(){}); }
     private List<String> stringList(Object value) { if (value == null) return new ArrayList<>(); if (value instanceof Collection) return ((Collection<?>) value).stream().map(String::valueOf).filter(StringUtils::isNotBlank).collect(Collectors.toList()); String s = text(value); return StringUtils.isBlank(s) ? new ArrayList<>() : Collections.singletonList(s); }
     private static Object getQuiet(ResultSet rs, String column) { try { return rs.getObject(column); } catch (SQLException e) { return null; } }
+    private static boolean rsBoolean(Object value) {
+        if (value instanceof byte[]) return ((byte[]) value).length > 0 && ((byte[]) value)[0] != 0;
+        if (value instanceof Number) return ((Number) value).intValue() != 0;
+        return Boolean.parseBoolean(String.valueOf(value));
+    }
     private static void putQuiet(ResultSet rs, Map<String, Object> map, String column, String key) { Object value = getQuiet(rs, column); if (value != null) map.put(key, value); }
     private static Map<String, Object> map(Object... values) { Map<String, Object> m = new LinkedHashMap<>(); for (int i = 0; i < values.length; i += 2) m.put(String.valueOf(values[i]), values[i + 1]); return m; }
     private static boolean answersEqual(Object expected, Object actual) { if (expected instanceof Collection || actual instanceof Collection) { Set<String> a = toSet(expected), b = toSet(actual); return a.equals(b); } return String.valueOf(expected).equalsIgnoreCase(String.valueOf(actual)); }

src/main/java/com/sztzjy/linkCommerce/service/PlatformQuestionBankService.java

@@ -0,0 +1,179 @@
+package com.sztzjy.linkCommerce.service;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.sztzjy.linkCommerce.ai.QwenChatClient;
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.util.file.IFileUtil;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.poi.ss.usermodel.DataFormatter;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.ss.usermodel.WorkbookFactory;
+import org.apache.poi.xwpf.usermodel.XWPFDocument;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+@Service
+public class PlatformQuestionBankService {
+    private static final String PLATFORM = "PLATFORM";
+    private final JdbcTemplate jdbc;
+    private final ObjectMapper objectMapper;
+    private final PlatformAdminService platformAdminService;
+    private final QwenChatClient qwen;
+    private final IFileUtil fileUtil;
+
+    public PlatformQuestionBankService(JdbcTemplate jdbc, ObjectMapper objectMapper,
+                                       PlatformAdminService platformAdminService, QwenChatClient qwen, IFileUtil fileUtil) {
+        this.jdbc = jdbc; this.objectMapper = objectMapper; this.platformAdminService = platformAdminService; this.qwen = qwen; this.fileUtil = fileUtil;
+    }
+
+    public Map<String, Object> uploadAttachment(JwtUser user, MultipartFile file) {
+        platformAdminService.requirePlatformAdmin(user);
+        if (file == null || file.isEmpty()) throw new IllegalArgumentException("请选择资料文件");
+        if (file.getSize() > 20L * 1024 * 1024) throw new IllegalArgumentException("资料不能超过20MB");
+        String name = StringUtils.defaultString(file.getOriginalFilename()).replace("\\", "_").replace("/", "_");
+        int dot = name.lastIndexOf('.'); String ext = dot < 0 ? "" : name.substring(dot + 1).toLowerCase(Locale.ROOT);
+        if (!Arrays.asList("pdf", "doc", "docx", "png", "jpg", "jpeg").contains(ext)) throw new IllegalArgumentException("资料仅支持PDF、Word和图片格式");
+        String path = fileUtil.upload(file);
+        return map("name", name, "url", "/" + path.replace('\\', '/'));
+    }
+
+    public List<Map<String, Object>> projects(JwtUser user) {
+        platformAdminService.requirePlatformAdmin(user);
+        return jdbc.query("select task_key,project_name,task_name from training_task where enabled is null or enabled=1 order by sort,project_name,task_name",
+                (rs, n) -> map("taskKey", rs.getString("task_key"), "projectName", rs.getString("project_name"), "taskName", rs.getString("task_name")));
+    }
+
+    public List<Map<String, Object>> list(JwtUser user, String type, String taskKey, String keyword) {
+        platformAdminService.requirePlatformAdmin(user);
+        StringBuilder sql = new StringBuilder("select q.*,t.project_name,t.task_name from exam_question q left join training_task t on t.task_key=q.task_key where q.source_type='PLATFORM'");
+        List<Object> args = new ArrayList<>();
+        if (StringUtils.isNotBlank(type)) { validateType(type); sql.append(" and q.question_type=?"); args.add(type); }
+        if (StringUtils.isNotBlank(taskKey)) { sql.append(" and q.task_key=?"); args.add(taskKey); }
+        if (StringUtils.isNotBlank(keyword)) { sql.append(" and q.stem like ?"); args.add("%" + keyword.trim() + "%"); }
+        sql.append(" order by q.update_time desc,q.id desc");
+        return jdbc.query(sql.toString(), (rs, n) -> row(rs), args.toArray());
+    }
+
+    public Map<String, Object> get(JwtUser user, long id) {
+        platformAdminService.requirePlatformAdmin(user);
+        List<Map<String, Object>> rows = jdbc.query("select q.*,t.project_name,t.task_name from exam_question q left join training_task t on t.task_key=q.task_key where q.id=? and q.source_type='PLATFORM'", (rs, n) -> row(rs), id);
+        if (rows.isEmpty()) throw new IllegalArgumentException("题目不存在");
+        return rows.get(0);
+    }
+
+    public Map<String, Object> save(JwtUser user, Long id, Map<String, Object> payload) {
+        platformAdminService.requirePlatformAdmin(user);
+        ValidQuestion q = validate(payload);
+        requireTask(q.taskKey);
+        if (id == null) {
+            jdbc.update("insert into exam_question(school_id,teacher_id,source_type,task_key,question_type,stem,options_json,answer_json,answer_analysis,attachment_name,attachment_url) values(?,?,?,?,?,?,?,?,?,?,?)",
+                    PLATFORM, PLATFORM, PLATFORM, q.taskKey, q.type, q.stem, json(q.options), json(q.answer), q.analysis, text(payload.get("attachmentName")), text(payload.get("attachmentUrl")));
+            id = jdbc.queryForObject("select last_insert_id()", Long.class);
+        } else {
+            get(user, id);
+            jdbc.update("update exam_question set task_key=?,question_type=?,stem=?,options_json=?,answer_json=?,answer_analysis=?,attachment_name=?,attachment_url=? where id=? and source_type='PLATFORM'",
+                    q.taskKey, q.type, q.stem, json(q.options), json(q.answer), q.analysis, text(payload.get("attachmentName")), text(payload.get("attachmentUrl")), id);
+        }
+        return get(user, id);
+    }
+
+    public void delete(JwtUser user, long id) {
+        platformAdminService.requirePlatformAdmin(user); get(user, id);
+        jdbc.update("delete from exam_question where id=? and source_type='PLATFORM'", id);
+    }
+
+    public Map<String, Object> aiPreview(JwtUser user, Map<String, Object> request) {
+        platformAdminService.requirePlatformAdmin(user);
+        String taskKey = required(request, "taskKey", "请选择归属项目");
+        requireTask(taskKey);
+        String type = required(request, "type", "请选择题型"); validateType(type);
+        int count;
+        try { count = Integer.parseInt(text(request.get("count"))); } catch (Exception e) { throw new IllegalArgumentException("题目数量必须是数字"); }
+        if (count < 1 || count > 50) throw new IllegalArgumentException("题目数量需在1到50之间");
+        String requirement = StringUtils.defaultString(text(request.get("requirement")), "围绕项目任务设计，题干清晰，答案准确，避免重复。");
+        String prompt = "请生成" + count + "道" + typeLabel(type) + "。每道题包含 type,stem,options,answer,analysis。" +
+                "选择题 options 为 [{label,content}]，判断题 answer 为 true/false，简答题 answer 为参考答案字符串。" + requirement;
+        String raw = qwen.completeJson("你是严谨的考试题库出题助手，只输出JSON对象，格式为{\"questions\":[...]}", prompt);
+        try {
+            JsonNode root = objectMapper.readTree(raw);
+            JsonNode items = root.isArray() ? root : root.path("questions");
+            if (!items.isArray()) throw new IllegalArgumentException("AI返回格式不正确");
+            List<Map<String, Object>> questions = objectMapper.convertValue(items, new TypeReference<List<Map<String, Object>>>(){});
+            if (questions.size() != count) throw new IllegalArgumentException("AI生成题目数量不符合要求");
+            List<Map<String, Object>> normalized = questions.stream().map(item -> { item.put("taskKey", taskKey); item.put("type", StringUtils.defaultIfBlank(text(item.get("type")), type)); return normalize(item); }).collect(Collectors.toList());
+            return map("taskKey", taskKey, "questions", normalized);
+        } catch (IllegalArgumentException e) { throw e; } catch (Exception e) { throw new IllegalArgumentException("AI返回内容无法解析"); }
+    }
+
+    @Transactional
+    public List<Map<String, Object>> aiConfirm(JwtUser user, Map<String, Object> request) {
+        platformAdminService.requirePlatformAdmin(user);
+        List<Map<String, Object>> questions = objectMapper.convertValue(request.get("questions"), new TypeReference<List<Map<String, Object>>>(){});
+        if (questions.isEmpty() || questions.size() > 50) throw new IllegalArgumentException("确认入库的题目数量不正确");
+        List<Map<String, Object>> saved = new ArrayList<>();
+        for (Map<String, Object> q : questions) saved.add(save(user, null, q));
+        return saved;
+    }
+
+    @Transactional
+    public List<Map<String, Object>> importExcel(JwtUser user, MultipartFile file, String taskKey) {
+        platformAdminService.requirePlatformAdmin(user); requireTask(taskKey);
+        if (file == null || file.isEmpty()) throw new IllegalArgumentException("请选择Word或Excel文件");
+        String name = StringUtils.defaultString(file.getOriginalFilename()).toLowerCase(Locale.ROOT);
+        if (name.endsWith(".docx")) return importWord(user, file, taskKey);
+        try (Workbook workbook = WorkbookFactory.create(file.getInputStream())) {
+            Sheet sheet = workbook.getSheetAt(0); DataFormatter formatter = new DataFormatter(); Row header = sheet.getRow(0);
+            if (header == null) throw new IllegalArgumentException("Excel缺少表头");
+            Map<String, Integer> columns = new HashMap<>(); for (int i=0;i<header.getLastCellNum();i++) columns.put(formatter.formatCellValue(header.getCell(i)).trim(), i);
+            List<Map<String,Object>> result = new ArrayList<>();
+            for (int r=1;r<=sheet.getLastRowNum();r++) { Row row=sheet.getRow(r); if (row==null) continue; Map<String,Object> q=new LinkedHashMap<>(); q.put("taskKey",taskKey); q.put("type", excelType(value(row, columns.get("题型"), formatter))); q.put("stem", value(row, columns.get("题干"), formatter)); q.put("answer", value(row, columns.get("正确答案"), formatter)); q.put("analysis", value(row, columns.get("答案解析"), formatter)); List<Map<String,Object>> options=new ArrayList<>(); for(char c='A';c<='H';c++){String v=value(row,columns.get("选项"+c),formatter); if(StringUtils.isNotBlank(v)) options.add(map("label",String.valueOf(c),"content",v));} q.put("options",options); if(StringUtils.isBlank(text(q.get("stem")))) continue; result.add(save(user,null,q)); }
+            return result;
+        } catch (IllegalArgumentException e) { throw e; } catch (Exception e) { throw new IllegalArgumentException("Excel导入失败，请检查模板"); }
+    }
+
+    private List<Map<String, Object>> importWord(JwtUser user, MultipartFile file, String taskKey) {
+        try (XWPFDocument doc = new XWPFDocument(file.getInputStream())) {
+            List<Map<String,Object>> result = new ArrayList<>(); Map<String,Object> current = null; List<Map<String,Object>> options = new ArrayList<>(); String type = "SHORT_ANSWER";
+            for (org.apache.poi.xwpf.usermodel.XWPFParagraph p : doc.getParagraphs()) {
+                String line = StringUtils.trimToEmpty(p.getText()); if (line.isEmpty()) continue;
+                String marker = line.replace("[", "").replace("]", "").replace("【", "").replace("】", "").trim();
+                if (Arrays.asList("单选题","多选题","判断题","简答题").contains(marker)) { if (current != null) { current.put("options", options); result.add(save(user,null,current)); } type = excelType(marker); current = null; options = new ArrayList<>(); continue; }
+                if (line.startsWith("题干") || line.startsWith("题目")) { if (current != null) { current.put("options", options); result.add(save(user,null,current)); } current = new LinkedHashMap<>(); current.put("taskKey",taskKey); current.put("type",type); current.put("stem",after(line)); continue; }
+                if (current == null) continue;
+                if (line.matches("^[A-H][.．、].*")) { options.add(map("label",line.substring(0,1),"content",line.substring(2).trim())); }
+                else if (line.startsWith("答案")) current.put("answer",after(line));
+                else if (line.startsWith("解析")) current.put("analysis",after(line));
+            }
+            if (current != null) { current.put("options", options); result.add(save(user,null,current)); }
+            if (result.isEmpty()) throw new IllegalArgumentException("Word未读取到题目"); return result;
+        } catch (IllegalArgumentException e) { throw e; } catch (Exception e) { throw new IllegalArgumentException("Word导入失败，请检查模板"); }
+    }
+
+    private ValidQuestion validate(Map<String,Object> p) { String type=required(p,"type","请选择题型"); validateType(type); String stem=required(p,"stem","题干不能为空"); if(StringUtils.isBlank(plain(stem))) throw new IllegalArgumentException("题干不能为空"); List<Map<String,Object>> options=objectMapper.convertValue(p.getOrDefault("options",Collections.emptyList()),new TypeReference<List<Map<String,Object>>>(){}); Object answer=p.get("answer"); if(type.equals("SINGLE")||type.equals("MULTIPLE")){ if(options.size()<2) throw new IllegalArgumentException("选择题至少需要两个选项"); Set<String> labels=new LinkedHashSet<>(); List<Map<String,Object>> normalized=new ArrayList<>(); for(Map<String,Object> o:options){String label=text(o.get("label")).trim().toUpperCase();String content=text(o.get("content")).trim();if(!label.matches("[A-H]")||StringUtils.isBlank(plain(content))||!labels.add(label)) throw new IllegalArgumentException("选项格式不正确"); normalized.add(map("label",label,"content",content));} List<String> answers=list(answer); if(type.equals("SINGLE")&&answers.size()!=1) throw new IllegalArgumentException("单选题只能设置一个正确答案"); if(answers.isEmpty()||!labels.containsAll(answers)) throw new IllegalArgumentException("正确答案必须来自题目选项"); return new ValidQuestion(type,stem,normalized,answers,text(p.get("analysis")),required(p,"taskKey","请选择归属项目")); } if(type.equals("TRUE_FALSE")){String v=text(answer);if(!"true".equalsIgnoreCase(v)&&!"false".equalsIgnoreCase(v)&&!"正确".equals(v)&&!"错误".equals(v))throw new IllegalArgumentException("判断题答案格式不正确");return new ValidQuestion(type,stem,Collections.emptyList(),"正确".equals(v)||"true".equalsIgnoreCase(v),text(p.get("analysis")),required(p,"taskKey","请选择归属项目"));} if(StringUtils.isBlank(plain(text(answer)))) throw new IllegalArgumentException("参考答案不能为空"); return new ValidQuestion(type,stem,Collections.emptyList(),text(answer),text(p.get("analysis")),required(p,"taskKey","请选择归属项目")); }
+    private Map<String,Object> normalize(Map<String,Object> p){ValidQuestion q=validate(p);return map("type",q.type,"stem",q.stem,"options",q.options,"answer",q.answer,"analysis",q.analysis,"taskKey",q.taskKey);}
+    private void requireTask(String key){if(jdbc.queryForObject("select count(*) from training_task where task_key=?",Integer.class,key)==0)throw new IllegalArgumentException("归属项目不存在");}
+    private Map<String,Object> row(java.sql.ResultSet rs)throws java.sql.SQLException{return map("id",rs.getLong("id"),"type",rs.getString("question_type"),"stem",rs.getString("stem"),"options",parse(rs.getString("options_json")),"answer",parse(rs.getString("answer_json")),"analysis",rs.getString("answer_analysis"),"attachmentName",rs.getString("attachment_name"),"attachmentUrl",rs.getString("attachment_url"),"sourceType",rs.getString("source_type"),"taskKey",rs.getString("task_key"),"projectName",rs.getString("project_name"),"taskName",rs.getString("task_name"),"updatedAt",rs.getTimestamp("update_time"));}
+    private Object parse(String s){try{return StringUtils.isBlank(s)?null:objectMapper.readValue(s,Object.class);}catch(Exception e){return s;}}
+    private String json(Object o){try{return objectMapper.writeValueAsString(o);}catch(Exception e){throw new IllegalArgumentException("数据格式错误");}}
+    private static String required(Map<String,Object> p,String k,String m){String v=text(p.get(k));if(StringUtils.isBlank(v))throw new IllegalArgumentException(m);return v.trim();}
+    private static String text(Object v){return v==null?"":String.valueOf(v);}
+    private static String plain(String value){return value == null ? "" : value.replaceAll("<[^>]+>", "").replace("&nbsp;", "").trim();}
+    private static List<String> list(Object v){if(v instanceof Collection)return ((Collection<?>)v).stream().map(String::valueOf).map(s->s.trim().toUpperCase()).filter(StringUtils::isNotBlank).distinct().collect(Collectors.toList());String s=text(v);return StringUtils.isBlank(s)?Collections.emptyList():Arrays.stream(s.split("[,，、 ]")).map(String::trim).map(String::toUpperCase).filter(StringUtils::isNotBlank).distinct().collect(Collectors.toList());}
+    private static void validateType(String t){if(!Arrays.asList("SINGLE","MULTIPLE","TRUE_FALSE","SHORT_ANSWER").contains(t))throw new IllegalArgumentException("不支持的题型");}
+    private static String typeLabel(String t){return mapOf("SINGLE","单选题","MULTIPLE","多选题","TRUE_FALSE","判断题","SHORT_ANSWER","简答题").get(t);}
+    private static String excelType(String t){if("单选题".equals(t))return "SINGLE";if("多选题".equals(t))return "MULTIPLE";if("判断题".equals(t))return "TRUE_FALSE";return "SHORT_ANSWER";}
+    private static String after(String s){int i=Math.max(s.indexOf('：'),s.indexOf(':'));return i<0?"":s.substring(i+1).trim();}
+    private static String value(Row r,Integer i,DataFormatter f){return i==null?"":f.formatCellValue(r.getCell(i)).trim();}
+    private static Map<String,Object> map(Object...v){Map<String,Object>m=new LinkedHashMap<>();for(int i=0;i<v.length;i+=2)m.put(String.valueOf(v[i]),v[i+1]);return m;}
+    private static Map<String,String> mapOf(String...v){Map<String,String>m=new HashMap<>();for(int i=0;i<v.length;i+=2)m.put(v[i],v[i+1]);return m;}
+    private static final class ValidQuestion{final String type,stem,analysis,taskKey;final List<Map<String,Object>> options;final Object answer;ValidQuestion(String t,String s,List<Map<String,Object>>o,Object a,String an,String k){type=t;stem=s;options=o;answer=a;analysis=an;taskKey=k;}}
+}