diff --git a/src/main/java/cc/ryanc/halo/model/dto/AttachmentAdminOutputDTO.java b/src/main/java/cc/ryanc/halo/model/dto/AttachmentAdminOutputDTO.java
index f2b433de5..fa5bd0a3e 100644
--- a/src/main/java/cc/ryanc/halo/model/dto/AttachmentAdminOutputDTO.java
+++ b/src/main/java/cc/ryanc/halo/model/dto/AttachmentAdminOutputDTO.java
@@ -1,7 +1,7 @@
 package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.Attachment;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import lombok.Data;
 
 /**
@@ -9,7 +9,7 @@ import lombok.Data;
  * @date : 2019-03-10
  */
 @Data
-public class AttachmentAdminOutputDTO extends AbstractOutputConverter<AttachmentAdminOutputDTO, Attachment> {
+public class AttachmentAdminOutputDTO implements OutputConverter<AttachmentAdminOutputDTO, Attachment> {
 
     private Long attachId;
 
diff --git a/src/main/java/cc/ryanc/halo/model/dto/CommentAdminOutputDTO.java b/src/main/java/cc/ryanc/halo/model/dto/CommentAdminOutputDTO.java
index 8d380928f..7a697fda2 100644
--- a/src/main/java/cc/ryanc/halo/model/dto/CommentAdminOutputDTO.java
+++ b/src/main/java/cc/ryanc/halo/model/dto/CommentAdminOutputDTO.java
@@ -2,7 +2,7 @@ package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.Comment;
 import cc.ryanc.halo.model.domain.Post;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -13,7 +13,7 @@ import java.util.Date;
  * @date : 2019-03-09
  */
 @Data
-public class CommentAdminOutputDTO extends AbstractOutputConverter<CommentAdminOutputDTO, Comment> {
+public class CommentAdminOutputDTO implements OutputConverter<CommentAdminOutputDTO, Comment> {
 
     private Long commentId;
 
diff --git a/src/main/java/cc/ryanc/halo/model/dto/PostAdminOutputDTO.java b/src/main/java/cc/ryanc/halo/model/dto/PostAdminOutputDTO.java
index 0bcaccb0a..9c7aeb6b7 100644
--- a/src/main/java/cc/ryanc/halo/model/dto/PostAdminOutputDTO.java
+++ b/src/main/java/cc/ryanc/halo/model/dto/PostAdminOutputDTO.java
@@ -4,7 +4,7 @@ import cc.ryanc.halo.model.domain.Category;
 import cc.ryanc.halo.model.domain.Comment;
 import cc.ryanc.halo.model.domain.Post;
 import cc.ryanc.halo.model.domain.Tag;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -17,7 +17,7 @@ import java.util.List;
  * @author johnniang
  */
 @Data
-public class PostAdminOutputDTO extends AbstractOutputConverter<PostAdminOutputDTO, Post> {
+public class PostAdminOutputDTO implements OutputConverter<PostAdminOutputDTO, Post> {
 
     private Long postId;
 
diff --git a/src/main/java/cc/ryanc/halo/model/dto/PostListOutputDTO.java b/src/main/java/cc/ryanc/halo/model/dto/PostListOutputDTO.java
index f77ad4098..ddbaf2edb 100644
--- a/src/main/java/cc/ryanc/halo/model/dto/PostListOutputDTO.java
+++ b/src/main/java/cc/ryanc/halo/model/dto/PostListOutputDTO.java
@@ -1,7 +1,7 @@
 package cc.ryanc.halo.model.dto;
 
 import cc.ryanc.halo.model.domain.*;
-import cc.ryanc.halo.model.dto.base.AbstractOutputConverter;
+import cc.ryanc.halo.model.dto.base.OutputConverter;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 
@@ -14,7 +14,7 @@ import java.util.List;
  * @author johnniang
  */
 @Data
-public class PostListOutputDTO extends AbstractOutputConverter<PostListOutputDTO, Post> {
+public class PostListOutputDTO implements OutputConverter<PostListOutputDTO, Post> {
 
     private Long postId;
 
diff --git a/src/main/java/cc/ryanc/halo/web/controller/admin/PostController.java b/src/main/java/cc/ryanc/halo/web/controller/admin/PostController.java
index beaaaa50e..ffc9a7ac1 100755
--- a/src/main/java/cc/ryanc/halo/web/controller/admin/PostController.java
+++ b/src/main/java/cc/ryanc/halo/web/controller/admin/PostController.java
@@ -23,6 +23,7 @@ import cn.hutool.crypto.SecureUtil;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.propertyeditors.CustomDateEditor;
+import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;