diff --git a/src/com/hellogithub/entity/commentEntity.java b/src/com/hellogithub/entity/commentEntity.java
index 7c3a297..0158805 100644
--- a/src/com/hellogithub/entity/commentEntity.java
+++ b/src/com/hellogithub/entity/commentEntity.java
@@ -85,4 +85,14 @@ public class commentEntity {
     public void setLikeNum(int likeCount) {
         this.likeNum = likeCount;
     }
+
+    String username;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
 }
diff --git a/src/com/hellogithub/service/commentService.java b/src/com/hellogithub/service/commentService.java
index 4068f88..3b62a0a 100644
--- a/src/com/hellogithub/service/commentService.java
+++ b/src/com/hellogithub/service/commentService.java
@@ -6,6 +6,7 @@ import com.hellogithub.dao.UserDao;
 import com.hellogithub.dao.commentDao;
 import com.hellogithub.entity.commentEntity;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -55,7 +56,7 @@ public class commentService {
 
     public String  selectByTrait(String id,String trait)
     {
-        List<commentEntity> commentEntityList = commentDao.selectByTrait(id,trait);
+        List<commentEntity> commentEntityList=new ArrayList<>();
         if(trait.equals("last"))
         {
             commentEntityList = commentDao.selectByTrait(id,"creatTime");
@@ -64,7 +65,13 @@ public class commentService {
         {
             commentEntityList = commentDao.selectByTrait(id,"likeNum");
         }
-
+        for(int i=0;i<commentEntityList.size();i++)
+        {
+            commentEntity commentEntity = commentEntityList.get(i);
+            int userid = commentEntity.getUserId();
+            String username = userDao.selectNameById(userid);
+            commentEntity.setUsername(username);
+        }
         return JSONObject.toJSONString(commentEntityList);
     }
     public String addLikeNum(int commentId){