diff --git a/src/main/java/org/jcnc/jnotepad/model/entity/DirFileModel.java b/src/main/java/org/jcnc/jnotepad/model/entity/DirFileModel.java
index 4cdfa91df1c531f2e652959f4eb1fae496a32a6a..49a6084edaa5978cdca14c10cb338a7726249bf8 100644
--- a/src/main/java/org/jcnc/jnotepad/model/entity/DirFileModel.java
+++ b/src/main/java/org/jcnc/jnotepad/model/entity/DirFileModel.java
@@ -13,13 +13,26 @@ import java.util.List;
  * @author cccqyu
  */
 public class DirFileModel {
+    /**
+     * 路径
+     */
     private String path;
+    /**
+     * 文件名
+     */
     private String name;
 
+    /**
+     * 未选中时的图标
+     */
     private Node iconIsNotSelected;
-
+    /**
+     * 选中时的图标
+     */
     private Node iconIsSelected;
-
+    /**
+     * 子文件
+     */
     private List<DirFileModel> childFile;
 
     public DirFileModel(String path, String name, List<DirFileModel> childFile, Node iconIsNotSelected, Node iconIsSelected) {
diff --git a/src/main/java/org/jcnc/jnotepad/views/manager/DirectorySidebarManager.java b/src/main/java/org/jcnc/jnotepad/views/manager/DirectorySidebarManager.java
index ac8473bc5c20947a153ee868727be6d3dcf79227..bc2b104ef6bd286c6799c0a7dd0b6a93aa733dd7 100644
--- a/src/main/java/org/jcnc/jnotepad/views/manager/DirectorySidebarManager.java
+++ b/src/main/java/org/jcnc/jnotepad/views/manager/DirectorySidebarManager.java
@@ -112,6 +112,16 @@ public class DirectorySidebarManager {
         expandFolder(dirFileModel, rootItem);
     }
 
+    /**
+     * Check if the given `DirFileModel` represents a directory.
+     *
+     * @param childFile the `DirFileModel` to check
+     * @return `true` if the `childFile` represents a directory, `false` otherwise
+     */
+    private static boolean isDirectoryByDirFileModel(DirFileModel childFile) {
+        return new File(childFile.getPath()).isDirectory();
+    }
+
     /**
      * 递归展开 dirFileModel
      *
@@ -123,7 +133,10 @@ public class DirectorySidebarManager {
         if (childFileList != null) {
             for (DirFileModel childFile : childFileList) {
                 TreeItem<DirFileModel> childItem = new TreeItem<>(childFile, childFile.getIconIsNotSelected());
-                childItem.expandedProperty().addListener(getTreeItemListener(childItem));
+                // 只有文件夹树才添加监听事件
+                if (isDirectoryByDirFileModel(childFile)) {
+                    childItem.expandedProperty().addListener(getTreeItemListener(childItem));
+                }
                 item.getChildren().add(childItem);
                 expandFolder(childFile, childItem);
             }