更新！

FullCardServer/src/main/java/com/zhongshu/card/server/core/util/AesUtils.java

@@ -91,10 +91,16 @@ public class AesUtils {
         return str;
     }
 
+    /**
+     * 文件base64内容
+     *
+     * @param file
+     * @return
+     */
     public static String turnMultipartFileToBase64(MultipartFile file) {
         if (file != null) {
             try {
-                return Base64.getEncoder().encodeToString(file.getInputStream().readAllBytes());
+                return Base64.getEncoder().encodeToString(toByteArray(file.getInputStream()));
             } catch (Exception e) {
                 e.printStackTrace();
             }