From 77cc9617502f60511e460a5f87a182a676f6b47f Mon Sep 17 00:00:00 2001
From: SeokGeunHo <kimc6555@gmail.com>
Date: Tue, 23 Sep 2025 16:17:00 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=EB=8C=93=EA=B8=80=20=EB=8B=A8=EA=B1=B4?=
 =?UTF-8?q?=20=EC=A1=B0=ED=9A=8C=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
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---
 .../post/comment/controller/CommentController.java  | 10 ++++++++++
 .../domain/post/comment/service/CommentService.java | 13 +++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/src/main/java/com/back/domain/post/comment/controller/CommentController.java b/src/main/java/com/back/domain/post/comment/controller/CommentController.java
index 7fb2c3e0..2e641904 100644
--- a/src/main/java/com/back/domain/post/comment/controller/CommentController.java
+++ b/src/main/java/com/back/domain/post/comment/controller/CommentController.java
@@ -3,6 +3,7 @@
 import com.back.domain.post.comment.dto.request.CommentCreateRequestDto;
 import com.back.domain.post.comment.dto.response.CommentResponseDto;
 import com.back.domain.post.comment.service.CommentService;
+import com.back.domain.post.post.dto.response.PostResponseDto;
 import com.back.global.rsData.RsData;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -48,4 +49,13 @@ public RsData<List<CommentResponseDto>> getComments(
   ) {
     return RsData.successOf(commentService.getComments(postId, lastId)); // code=200, message="success"
   }
+
+  @GetMapping("/{commentId}")
+  @Operation(summary = "댓글 단건 조회")
+  public RsData<CommentResponseDto> getComment(
+      @PathVariable Long postId,
+      @PathVariable Long commentId
+  ) {
+    return RsData.successOf(commentService.getComment(postId, commentId)); // code=200, message="success"
+  }
 }
diff --git a/src/main/java/com/back/domain/post/comment/service/CommentService.java b/src/main/java/com/back/domain/post/comment/service/CommentService.java
index 6d9977ac..d995b18b 100644
--- a/src/main/java/com/back/domain/post/comment/service/CommentService.java
+++ b/src/main/java/com/back/domain/post/comment/service/CommentService.java
@@ -53,4 +53,17 @@ public List<CommentResponseDto> getComments(Long postId, Long lastId) {
           .toList();
     }
   }
+
+  // 댓글 단건 조회 로직
+  @Transactional(readOnly = true)
+  public CommentResponseDto getComment(Long postId, Long commentId) {
+    Comment comment = commentRepository.findById(commentId)
+        .orElseThrow(() -> new IllegalArgumentException("댓글이 존재하지 않습니다. id=" + commentId));
+
+    if (!comment.getPost().getId().equals(postId)) {
+      throw new IllegalStateException("댓글이 해당 게시글에 속하지 않습니다.");
+    }
+
+    return new CommentResponseDto(comment);
+  }
 }