fix GET /api/comments/post/{postId} modify return

Change-Id: Iff2dd42b2bb601e36e5a35446e9a80abb182a7e9
diff --git a/src/main/java/com/example/g8backend/controller/CommentController.java b/src/main/java/com/example/g8backend/controller/CommentController.java
index 8d61f23..d861715 100644
--- a/src/main/java/com/example/g8backend/controller/CommentController.java
+++ b/src/main/java/com/example/g8backend/controller/CommentController.java
@@ -25,15 +25,24 @@
         return ResponseEntity.ok(response);
     }
 
-    // 获取某帖子下的所有评论,包括顶级评论及其子评论
     @GetMapping("/post/{postId}")
-    public List<Comment> getCommentsByPostId(@PathVariable Long postId) {
-        return commentService.getCommentsByPostId(postId);
+    public ApiResponse<List<Comment>> getCommentsByPostId(@PathVariable Long postId) {
+        ApiResponse<List<Comment>> response = new ApiResponse<>();
+        response.setCode(200);
+        response.setMessage("获取评论成功");
+        
+        response.setData(commentService.getCommentsByPostId(postId));
+        return response;
     }
 
     // 删除评论
     @DeleteMapping("/{commentId}")
-    public void deleteComment(@PathVariable Long commentId) {
-        commentService.deleteComment(commentId);
+    public ApiResponse<String> deleteComment(@PathVariable Long commentId) {
+        try {
+            commentService.deleteComment(commentId);
+            return ApiResponse.message("评论删除成功");
+        } catch (Exception e) {
+            return ApiResponse.error(500, "评论删除失败" + e.getMessage());
+        }
     }
 }