update 优化 文件上传增加文件内容长度校验

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/controller/system/SysProfileController.java

@@ -2,6 +2,7 @@ package org.dromara.system.controller.system;
 
 import cn.hutool.core.bean.BeanUtil;
 import cn.hutool.core.io.FileUtil;
+import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.crypto.digest.BCrypt;
 import lombok.RequiredArgsConstructor;
 import org.apache.dubbo.config.annotation.DubboReference;
@@ -120,7 +121,7 @@ public class SysProfileController extends BaseController {
     @Log(title = "用户头像", businessType = BusinessType.UPDATE)
     @PostMapping(value = "/avatar", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
     public R<AvatarVo> avatar(@RequestPart("avatarfile") MultipartFile avatarfile) throws IOException {
-        if (!avatarfile.isEmpty()) {
+        if (ObjectUtil.isNotNull(avatarfile) && !avatarfile.isEmpty()) {
             String extension = FileUtil.extName(avatarfile.getOriginalFilename());
             if (!StringUtils.equalsAnyIgnoreCase(extension, MimeTypeUtils.IMAGE_EXTENSION)) {
                 return R.fail("文件格式不正确，请上传" + Arrays.toString(MimeTypeUtils.IMAGE_EXTENSION) + "格式");