完成后端上传文件的代码。

code/backend/RegulatoryManagementBackend/src/main/java/com/cpic/xim/web/controllers/fileupload/FileUpload.java

@@ -27,7 +27,7 @@ import org.springframework.web.bind.annotation.RequestMethod;
 // @SuppressWarnings( "unused" )
 @Controller
 @RequestMapping( path = "/file" )
-public abstract class FileUpload
+public class FileUpload
 {
     /**
      * 接收上传文件，并保存到临时目录：
@@ -101,7 +101,7 @@ public abstract class FileUpload
 
     @RequestMapping( path = "/file-upload.do" )
     @ResponseBody
-    public static FileUploadResult saveUploadFile(
+    public FileUploadResult saveUploadFile(
             @RequestParam( "file-name" ) String fileName,
             @RequestParam( "files" ) MultipartFile file,
             HttpServletRequest request
@@ -119,7 +119,7 @@ public abstract class FileUpload
         File   dir      = new File( filePath );
 
         // 创建临时目录
-        if ( !dir.mkdirs() )
+        if ( (!dir.exists()) && (!dir.mkdirs()) )
         {
             result.setSuccess( false );
             result.setMessage( "创建临时目录失败：" + filePath );
@@ -129,6 +129,8 @@ public abstract class FileUpload
 
         try
         {
+            files[0] = file;
+
             SaveUploadFile.saveUploadFile( files, filePath );
         }
         catch ( ProcessUploadedFileException error )

code/backend/RegulatoryManagementBackend/src/main/java/com/cpic/xim/web/controllers/fileupload/SaveUploadFile.java

@@ -2,7 +2,7 @@
  * @Author: Kane Wang <wangkane@qq.com>
  * @Date: 2025-10-16 09:46:42
  * @LastEditors: Kane Wang
- * @LastModified: 2025-10-16 10:50:45
+ * @LastModified: 2025-10-16 15:16:57
  * @FilePath: src/main/java/com/cpic/xim/web/controllers/fileupload/SaveUploadFile.java
  * @Description:
  *
@@ -12,6 +12,8 @@ package com.cpic.xim.web.controllers.fileupload;
 
 import java.io.File;
 import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
 import java.util.HashMap;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -29,12 +31,6 @@ public class SaveUploadFile
         String fileName = "";
         String fullPath;
 
-        // if ( !dir.mkdir() )
-        // {
-        //     // 创建目录失败
-        //     throw new ProcessUploadedFileException( "创建临时目录失败：" + tempFilePath );
-        // }
-
         if ( !(tempFilePath.endsWith( "/" ) || tempFilePath.endsWith( "\\" )) )
         {
             fullPath = tempFilePath + "/";
@@ -54,12 +50,14 @@ public class SaveUploadFile
                     continue;
                 }
 
-                fileName = file.getOriginalFilename();
+                // 文件名前加上时间戳，避免覆盖
+                Long milliSecond = LocalDateTime.now().toInstant( ZoneOffset.of( "+8" ) ).toEpochMilli();
+
+                fileName = String.valueOf( milliSecond ) + " - " + file.getOriginalFilename();
                 File destFile = new File( tempFilePath, fileName );
 
                 file.transferTo( destFile );
 
-
                 savedFiles.put( fileName, fullPath + fileName );
             }
         }

code/backend/RegulatoryManagementBackend/src/main/webapp/WEB-INF/classes/spring.xml

@@ -29,9 +29,10 @@
     </bean> -->
 
     <bean id="multipartResolver"
-        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
-        <property name="defaultEncoding" value="UTF-8" />
-        <property name="maxUploadSize" value="-1" />
+        class="org.springframework.web.multipart.support.StandardServletMultipartResolver">
+        <!-- <property name="defaultEncoding" value="UTF-8" /> -->
+        <!-- <property name="maxUploadSize" value="-1" /> -->
+         <!-- <property name="maxFileSize" value="10485760" /> -->
     </bean>
 
 </beans>

code/backend/RegulatoryManagementBackend/src/main/webapp/WEB-INF/web.xml

@@ -17,6 +17,14 @@
             <param-value>classpath:spring.xml</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
+        <multipart-config>
+            <!--         上传文件最大为多少   -->
+            <max-file-size>10485760</max-file-size>
+            <!--         最大的请求大小   -->
+            <max-request-size>10485760</max-request-size>
+            <!--         多大以上的文件可以上传   -->
+            <file-size-threshold>0</file-size-threshold>
+        </multipart-config>
     </servlet>
     <servlet-mapping>
         <servlet-name>springmvc</servlet-name>