diff --git a/designer-base/src/main/java/com/fr/design/javascript/JSContentPane.java b/designer-base/src/main/java/com/fr/design/javascript/JSContentPane.java
index da0910126e..2ca2d6e66a 100644
--- a/designer-base/src/main/java/com/fr/design/javascript/JSContentPane.java
+++ b/designer-base/src/main/java/com/fr/design/javascript/JSContentPane.java
@@ -87,22 +87,14 @@ public class JSContentPane extends BasicPane {
         contentTextArea.addFocusListener(new FocusListener() {
             @Override
             public void focusGained(FocusEvent e) {
-                if (ac == null) {
-                    CompletionProvider provider = createCompletionProvider();
-                    ac = new AutoCompletion(provider);
-                    String shortCuts = DesignerEnvManager.getEnvManager().getAutoCompleteShortcuts();
-
-                    ac.setTriggerKey(convert2KeyStroke(shortCuts));
-                    ac.install(contentTextArea);
-                }
+                // 获得焦点时 安装
+                installAutoCompletion();
             }
 
             @Override
             public void focusLost(FocusEvent e) {
-                if (ac != null) {
-                    ac.uninstall();
-                    ac = null;
-                }
+                // 失去焦点时 卸载
+                uninstallAutoCompletion();
             }
         });
 
@@ -115,6 +107,30 @@ public class JSContentPane extends BasicPane {
         return KeyStroke.getKeyStroke(ks.replace("+", "pressed"));
     }
 
+    /**
+     * 注册安装 自动补全监听
+     */
+    private void installAutoCompletion() {
+        if (ac == null) {
+            CompletionProvider provider = createCompletionProvider();
+            ac = new AutoCompletion(provider);
+            String shortCuts = DesignerEnvManager.getEnvManager().getAutoCompleteShortcuts();
+
+            ac.setTriggerKey(convert2KeyStroke(shortCuts));
+            ac.install(contentTextArea);
+        }
+    }
+
+    /**
+     * 卸载移除 自动补全监听
+     */
+    private void uninstallAutoCompletion() {
+        if (ac != null) {
+            ac.uninstall();
+            ac = null;
+        }
+    }
+
     @Override
     protected String title4PopupWindow() {
         return "JS";