保存进度！

code/java/car_dealer/pom.xml

@@ -75,6 +75,12 @@
       <artifactId>commons-fileupload</artifactId>
       <version>1.4</version>
     </dependency>
+    <!-- https://mvnrepository.com/artifact/javax.annotation/javax.annotation-api -->
+    <dependency>
+      <groupId>javax.annotation</groupId>
+      <artifactId>javax.annotation-api</artifactId>
+      <version>1.3.2</version>
+    </dependency>
 
   </dependencies>
 

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: 2022-10-11 09:40:45
+ * @LastEditTime: 2022-10-11 11:06:56
  * @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. 
@@ -13,6 +13,7 @@ package com.cpic.xim.car_dealer.controllers.fileupload;
 import java.io.File;
 import java.io.IOException;
 import java.nio.channels.IllegalSelectorException;
+import javax.annotation.PostConstruct;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.springframework.context.annotation.Scope;
@@ -26,6 +27,17 @@ import org.springframework.web.multipart.MultipartFile;
 @RequestMapping( path = "/upload")
 public class FileUploadController
 {
+    @PostConstruct
+    public void init()
+    {
+        // WebApplicationContext webApplicationContext =
+        // ContextLoader.getCurrentWebApplicationContext();
+        // ServletContext servletContext = webApplicationContext.getServletContext();
+        // String realPath = servletContext.getRealPath( "" );
+
+        // System.out.println( realPath );
+    }
+
     /*****************************************************
      * 接收上传文件，并保存到临时目录：
      * 1、临时目录下再用sessionID作为子目录保存文件。

code/java/car_dealer/src/main/webapp/file_upload.html

@@ -2,7 +2,7 @@
  * @Author: Kane
  * @Date: 2022-09-29 16:33:30
  * @LastEditors: Kane
- * @LastEditTime: 2022-10-09 10:24:17
+ * @LastEditTime: 2022-10-11 10:08:30
  * @FilePath: \car_dealer\src\main\webapp\file_upload.html
  * @Description: 
  * 
@@ -78,6 +78,8 @@
             };
 
             xhr.onload = function (event) {
+                console.log(xhr.responseText);
+
                 let result = JSON.parse(xhr.responseText);
 
                 console.log(result);