diff --git a/README.md b/README.md
index 3881bf5..12b3eac 100644
--- a/README.md
+++ b/README.md
@@ -13,8 +13,8 @@
 windows: `Alt + insert`, Mac: `control + Enter`
 
 #### 最近更新
-* 2018.11.2
-    * 1.4.3 优化了InsertClass的首次插入操作。
+* 2020.07.20
+    * 1.4.4 优化代码
 
 #### 功能介绍
 ##### 简体中文
@@ -65,6 +65,7 @@ QQ:11563928
 * 1.4.1 修复没有style标签异常的情况，优化了实现缩小了插件大小。
 * 1.4.2 修改开源项目地址。
 * 1.4.3 优化了InsertClass的首次插入操作。
+* 1.4.4 优化代码
 
 #### 给我买杯咖啡 Buy me a coffee
 ![image](https://user-images.githubusercontent.com/13230237/35954042-88d45846-0cc2-11e8-98a3-29adb4f0be9a.png)
diff --git a/src/main/java/InsertAction.java b/src/main/java/InsertAction.java
index f362e87..496a921 100644
--- a/src/main/java/InsertAction.java
+++ b/src/main/java/InsertAction.java
@@ -29,9 +29,7 @@ public void actionPerformed(AnActionEvent anActionEvent) {
             String text = null;//从数据中获取文本值
             try {
                 text = (String) content.getTransferData(DataFlavor.stringFlavor);
-            } catch (UnsupportedFlavorException e) {
-                e.printStackTrace();
-            } catch (IOException e) {
+            } catch (UnsupportedFlavorException | IOException e) {
                 e.printStackTrace();
             }
             //获取位置
@@ -42,15 +40,15 @@ public void actionPerformed(AnActionEvent anActionEvent) {
             //获取空格数
             CaretModel caretModel = editor.getCaretModel();
             caretModel.moveToOffset(start);
-            String space = "";
+            StringBuilder space = new StringBuilder();
             for (int i = 0; i < caretModel.getLogicalPosition().column; i++) {
-                space += " ";
+                space.append(" ");
             }
             if (text == null) {
                 return;
             }
             //格式化代码
-            final String resultText = formatCode(text, space);
+            final String resultText = formatCode(text, space.toString());
             //插入内容
             WriteCommandAction.runWriteCommandAction(editor.getProject(),
                     () -> document.replaceString(start, end, resultText));
diff --git a/src/main/java/InsertClassAction.java b/src/main/java/InsertClassAction.java
index 25ad3cf..6291207 100644
--- a/src/main/java/InsertClassAction.java
+++ b/src/main/java/InsertClassAction.java
@@ -57,13 +57,16 @@ public void actionPerformed(AnActionEvent anActionEvent) {
         int newEndTag = endTag;
         String insertString = preInsertString;
         WriteCommandAction.runWriteCommandAction(editor.getProject(), () -> document.insertString(newEndTag, insertString));
+        assert currentPsiFile.getParent() != null;
         PsiFile targetPsiFile = currentPsiFile.getParent().findFile(currentFileName + ".vue");
+        assert targetPsiFile != null;
         OpenFileDescriptor openFileDescriptor = new OpenFileDescriptor(
                 anActionEvent.getProject(),
                 targetPsiFile.getVirtualFile(),
                 document.getLineNumber(endTag - 1));
         Editor targetEdit = FileEditorManager.getInstance(anActionEvent.getProject())
                 .openTextEditor(openFileDescriptor, true);
+        assert targetEdit != null;
         ScrollingModel scrollingModel = targetEdit.getScrollingModel();
         scrollingModel.scrollTo(targetEdit.offsetToLogicalPosition(endTag + insertString.length() - 1), ScrollType.MAKE_VISIBLE);
         CaretModel caretModel = targetEdit.getCaretModel();
diff --git a/src/main/resources/META-INF/plugin.xml b/src/main/resources/META-INF/plugin.xml
index d800594..529ddf8 100644
--- a/src/main/resources/META-INF/plugin.xml
+++ b/src/main/resources/META-INF/plugin.xml
@@ -42,11 +42,11 @@
     <change-notes><![CDATA[
     <ul>
         <li>......</li>
-        <li>1.3.0 GoCss加入一直期待支持的 Navigate Back & Forward 快捷键来回切换。</li>
         <li>1.4.0 新增InsertClass功能，该功能处于公共测试阶段，如有问题，欢迎在github上提出。</li>
         <li>1.4.1 修复没有style标签异常的情况，优化了实现缩小了插件大小。</li>
         <li>1.4.2 修改开源项目地址。</li>
         <li>1.4.3 优化了InsertClass的首次插入操作。</li>
+        <li>1.4.4 优化代码</li>
     </ul>
     ]]>
     </change-notes>