基本完成

src/main/java/org/cmh/backend/CourseManagement/controller/CourseController.java

@@ -114,4 +114,25 @@ public class CourseController {
             return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
         }
     }
+    @GetMapping("/sort")
+    public ResponseEntity<GetCourseListResponse> sortCourses(@RequestParam String token,
+                                                             @RequestParam String sortField,
+                                                             @RequestParam String sortDirection,
+                                                             @RequestParam Integer start,
+                                                             @RequestParam Integer end) {
+        if (start >= end) {
+            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+        }
+
+        try {
+            long courseCount = courseService.getCourseCount();
+            List<Course> sortedCourses = courseService.sortCourses(sortField, sortDirection, start, end);
+
+            return new ResponseEntity<>(new GetCourseListResponse(courseCount, sortedCourses), HttpStatus.OK);
+        } catch (Exception e) {
+            logger.error("Sort courses failed with parameters: sortField={}, sortDirection={}, start={}, end={}",
+                    sortField, sortDirection, start, end, e);
+            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
+        }
+    }
 }

src/main/java/org/cmh/backend/CourseManagement/service/CourseService.java

@@ -37,6 +37,8 @@ public class CourseService {
         course.setAuthor(request.getAuthor());
         course.setDescription(request.getDescription());
         course.setOrderNo(request.getOrderNo());
+        course.setVideoPath(request.getVideoPath()); // 确保保存视频路径
+        course.setImagePath(request.getImagePath()); // 确保保存图片路径
         courseRepository.save(course);
     }
 
@@ -46,6 +48,8 @@ public class CourseService {
         course.setAuthor(request.getAuthor());
         course.setDescription(request.getDescription());
         course.setOrderNo(request.getOrderNo());
+        course.setVideoPath(request.getVideoPath()); // 确保更新视频路径
+        course.setImagePath(request.getImagePath()); // 确保更新图片路径
         courseRepository.save(course);
     }
 
@@ -69,4 +73,11 @@ public class CourseService {
     public long getCourseCountByCriteria(String title, String author, String description, String sortOrder) {
         return courseRepository.count(CourseSpecification.searchCourses(title, author, description, sortOrder));
     }
+    public List<Course> sortCourses(String sortField, String sortDirection, int start, int end) {
+        Pageable pageable = PageRequest.of(start, end - start);
+        return courseRepository.findAll(
+                CourseSpecification.sortCourses(sortField, sortDirection),
+                pageable
+        ).getContent();
+    }
 }

src/main/java/org/cmh/backend/CourseManagement/specification/CourseSpecification.java

@@ -31,4 +31,14 @@ public class CourseSpecification {
             return criteriaBuilder.and(predicates.toArray(new Predicate[0]));
         };
     }
+    public static Specification<Course> sortCourses(String sortField, String sortDirection) {
+        return (root, query, cb) -> {
+            if ("asc".equalsIgnoreCase(sortDirection)) {
+                query.orderBy(cb.asc(root.get(sortField)));
+            } else if ("desc".equalsIgnoreCase(sortDirection)) {
+                query.orderBy(cb.desc(root.get(sortField)));
+            }
+            return cb.conjunction();
+        };
+    }
 }