diff --git a/__init__.py b/__init__.py
index 5bc951c..303711a 100644
--- a/__init__.py
+++ b/__init__.py
@@ -25,20 +25,32 @@
 """
 
 try:
-    import fontTools
-except ImportError:
-    print("no fonttool.....")
     import sys
     import os
     sys.path.append(os.path.dirname(__file__))
 
+    import fontTools
+except ImportError:
+    print("no fonttool.....")
+
+    # 确保在插件运行时能够访问依赖项
+    def install_and_import(package):
+        try:
+            __import__(package)
+        except ImportError:
+            try:
+                # 尝试使用 QGIS 的 Python 环境中的 pip 安装包
+                import pip # type: ignore
+                pip.main(['install', package])
+            except AttributeError:
+                # 适用于较新版本的 pip
+                import subprocess
+                subprocess.check_call([sys.executable, '-m', 'pip', 'install', package])
+            __import__(package)
+    install_and_import("fontTools")
+
+
 # noinspection PyPep8Naming
 def classFactory(iface):  # pylint: disable=invalid-name
-    """Load FontOutline class from file FontOutline.
-
-    :param iface: A QGIS interface instance.
-    :type iface: QgsInterface
-    """
-    #
     from .font_outline import FontOutline
     return FontOutline(iface)
diff --git a/font_outline.py b/font_outline.py
index 361b570..5a1290a 100644
--- a/font_outline.py
+++ b/font_outline.py
@@ -169,31 +169,21 @@ def run(self):
         self.dlg.show() # show the dialog
         
         result = self.dlg.exec_() # Run the dialog event loop
-        # See if OK was pressed
+
         if result:
             input_str = self.dlg.lineEdit.text()
-            location_text = self.dlg.location_text.text()
-            saveFileWidget = self.dlg.saveFileWidget
-
-            # self.dlg.saveFileWidget.setStorageMode(3)
-            # self.dlg.saveFileWidget.setFilter('GeoJSON Files (*.geojson);;All Files (*)')
-            # saveFileWidget.setFilter("geojson;;json")
-
-            print("saveFileWidget:", self.dlg.saveFileWidget)
+            if input_str is "" or input_str is None:
+                return self.iface.messageBar().pushMessage("warning", f"输入字符串为空。执行失败。", level=Qgis.Warning, duration=5)
 
+            location_text = self.dlg.location_text.text()
             save_path = self.dlg.saveFileWidget.filePath()
-
-            print("input_str:", input_str)
-            print("location_text: ", location_text)
-            print("save_path:", save_path)
+            if not (save_path.endswith(".geojson") and save_path.endswith(".json")) :
+                save_path += ".geojson"
 
             self._save2file(input_str, location_text, save_path)
 
             self._result2project(save_path)
-            # self._result2project(r"C:\Users\Raino\Desktop\raino1.geojson")
 
-            # 显示结果
-            # QMessageBox.information(self.iface.mainWindow(), "finish!!!", f"fontoutline plugin finished, the save file to {save_path}")
 
     def _save2file(self, input_str, location_text, save_path):
         fontparse = FontParser(os.path.join(self.plugin_dir,"assets", "msyahei.ttf"))
@@ -208,7 +198,7 @@ def _result2project(self, geojson_path):
 
         # 检查图层是否有效
         if not layer.isValid():
-            print("GeoJSON 图层加载失败")
+            self.iface.messageBar().pushMessage("error", f" geojson 文件：{geojson_path} 加载失败。。", level=Qgis.Error, duration=5)
             return
 
         # 将图层添加到当前项目中
@@ -216,5 +206,5 @@ def _result2project(self, geojson_path):
 
         # 反馈信息
         self.iface.messageBar().pushMessage("success", f"成功加载 geojson 文件：{geojson_path}", level=Qgis.Info, duration=5)
-        
+              
 
diff --git a/font_outline_dialog.py b/font_outline_dialog.py
index 531f71d..69cece3 100644
--- a/font_outline_dialog.py
+++ b/font_outline_dialog.py
@@ -45,3 +45,10 @@ def __init__(self, parent=None):
         # http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
         # #widgets-and-dialogs-with-auto-connect
         self.setupUi(self)
+
+        self.dlg.lineEdit.textChanged.connect(self.on_input_changed)
+
+    def on_input_changed(self, text):
+        if text is "" or text is None:
+            # TODO: 输入字符空值判断
+            print("输入字符串不能为空。")