diff --git a/code/java/car_dealer/.vscode/settings.json b/code/java/car_dealer/.vscode/settings.json
index e0f15db..0be1c0c 100644
--- a/code/java/car_dealer/.vscode/settings.json
+++ b/code/java/car_dealer/.vscode/settings.json
@@ -1,3 +1,4 @@
 {
-    "java.configuration.updateBuildConfiguration": "automatic"
+    "java.configuration.updateBuildConfiguration": "automatic",
+    "java.compile.nullAnalysis.mode": "automatic"
 }
\ No newline at end of file
diff --git a/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/controllers/fileupload/FileUploadController.java b/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/controllers/fileupload/FileUploadController.java
index a8a6464..c9467a4 100644
--- a/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/controllers/fileupload/FileUploadController.java
+++ b/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/controllers/fileupload/FileUploadController.java
@@ -2,7 +2,7 @@
  * @Author: Kane
  * @Date: 2022-09-28 15:47:02
  * @LastEditors: Kane
- * @LastEditTime: 2022-10-31 11:08:29
+ * @LastEditTime: 2022-12-15 17:45:18
  * @FilePath: \car_dealer\src\main\java\com\cpic\xim\car_dealer\controllers\fileupload\FileUploadController.java
  * @Description: 用于实现跨域功能的过滤器对象。
  * Copyright (c) ${2022} by Kane, All Rights Reserved. 
@@ -56,6 +56,7 @@ public class FileUploadController
         FileUploadResult result = new FileUploadResult();
         String sessionID = request.getSession().getId();
 
+
         if ( uploadFile == null)
         {
             result.setSuccess( false );
diff --git a/code/java/car_dealer/src/main/webapp/WEB-INF/classes/spring.xml b/code/java/car_dealer/src/main/webapp/WEB-INF/classes/spring.xml
index 67ae7ed..3049bdd 100644
--- a/code/java/car_dealer/src/main/webapp/WEB-INF/classes/spring.xml
+++ b/code/java/car_dealer/src/main/webapp/WEB-INF/classes/spring.xml
@@ -1,13 +1,12 @@
-<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation="
-    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
-    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
-    http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
-    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
-    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
-    http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
-    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
-    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
-    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
 
     <context:component-scan base-package="com.cpic.xim" />
     <mvc:annotation-driven />