diff --git a/src/common/model/matter/Matter.ts b/src/common/model/matter/Matter.ts
index 6b9e0bf..74300e3 100644
--- a/src/common/model/matter/Matter.ts
+++ b/src/common/model/matter/Matter.ts
@@ -3,7 +3,7 @@ import axios, { CancelTokenSource } from "axios";
 import BaseEntity from "../base/BaseEntity";
 import Filter from "../base/filter/Filter";
 import HttpUtil from "../../util/HttpUtil";
-import FileUtil from "../../util/FileHelper";
+import FileHelper from "../../util/FileHelper";
 import ImageUtil from "../../util/ImageUtil";
 import EnvUtil from "../../util/EnvUtil";
 import InputFilter from "../base/filter/InputFilter";
@@ -133,46 +133,46 @@ export default class Matter extends BaseEntity {
   }
 
   isImage() {
-    return FileUtil.isImage(this.name);
+    return FileHelper.isImage(this.name);
   }
 
   isPdf() {
-    return FileUtil.isPdf(this.name);
+    return FileHelper.isPdf(this.name);
   }
 
   isText() {
-    return FileUtil.isText(this.name);
+    return FileHelper.isText(this.name);
   }
 
   isDoc() {
-    return FileUtil.isDoc(this.name);
+    return FileHelper.isDoc(this.name);
   }
 
   isPpt() {
-    return FileUtil.isPpt(this.name);
+    return FileHelper.isPpt(this.name);
   }
 
   isXls() {
-    return FileUtil.isXls(this.name);
+    return FileHelper.isXls(this.name);
   }
 
   isAudio() {
-    return FileUtil.isAudio(this.name);
+    return FileHelper.isAudio(this.name);
   }
 
   isVideo() {
-    return FileUtil.isVideo(this.name);
+    return FileHelper.isVideo(this.name);
   }
 
   isPsd() {
-    return FileUtil.isPsd(this.name);
+    return FileHelper.isPsd(this.name);
   }
 
   getIcon() {
-    if (FileUtil.isImage(this.name)) {
+    if (FileHelper.isImage(this.name)) {
       return ImageUtil.handleImageUrl(this.getPreviewUrl(), false, 100, 100);
     } else {
-      return FileUtil.getIcon(this.name, this.dir);
+      return FileHelper.getIcon(this.name, this.dir);
     }
   }
 
diff --git a/src/common/model/share/Share.ts b/src/common/model/share/Share.ts
index 378e107..6c34995 100644
--- a/src/common/model/share/Share.ts
+++ b/src/common/model/share/Share.ts
@@ -1,6 +1,6 @@
 import BaseEntity from "../base/BaseEntity";
 import Matter from "../matter/Matter";
-import FileUtil from "../../util/FileHelper";
+import FileHelper from "../../util/FileHelper";
 import EnvUtil from "../../util/EnvUtil";
 import {ShareType} from "./ShareType";
 import {ShareExpireOption, ShareExpireOptionMap} from "./ShareExpireOption";
@@ -62,12 +62,12 @@ export default class Share extends BaseEntity {
 
   getIcon() {
     if (this.shareType === ShareType.MIX) {
-      return FileUtil.getIcon(
+      return FileHelper.getIcon(
         "zip",
         false
       );
     } else {
-      return FileUtil.getIcon(
+      return FileHelper.getIcon(
         this.name,
         this.shareType === ShareType.DIRECTORY
       );
diff --git a/src/common/util/FileHelper.tsx b/src/common/util/FileHelper.tsx
index f3489ad..3926607 100644
--- a/src/common/util/FileHelper.tsx
+++ b/src/common/util/FileHelper.tsx
@@ -15,7 +15,7 @@ import textSvg from "../../assets/image/file/text.svg";
 import videoSvg from "../../assets/image/file/video.svg";
 import xlsSvg from "../../assets/image/file/xls.svg";
 
-export default class FileUtil {
+export default class FileHelper {
   static isImage(name: string | null): boolean {
     let mimeType = MimeUtil.getMimeType(name);
     return StringUtil.startWith(mimeType, "image");
@@ -89,26 +89,26 @@ export default class FileUtil {
       return folderSvg;
     }
 
-    if (FileUtil.isPdf(name)) {
+    if (FileHelper.isPdf(name)) {
       return pdfSvg;
-    } else if (FileUtil.isDoc(name)) {
+    } else if (FileHelper.isDoc(name)) {
       return docSvg;
-    } else if (FileUtil.isPpt(name)) {
+    } else if (FileHelper.isPpt(name)) {
       return pptSvg;
-    } else if (FileUtil.isXls(name)) {
+    } else if (FileHelper.isXls(name)) {
       return xlsSvg;
-    } else if (FileUtil.isAudio(name)) {
+    } else if (FileHelper.isAudio(name)) {
       return audioSvg;
     } else if (
-      FileUtil.isVideo(name) ||
+      FileHelper.isVideo(name) ||
       MimeUtil.getExtension(name) === ".mkv"
     ) {
       return videoSvg;
-    } else if (FileUtil.isText(name)) {
+    } else if (FileHelper.isText(name)) {
       return textSvg;
-    } else if (FileUtil.isPsd(name)) {
+    } else if (FileHelper.isPsd(name)) {
       return psdSvg;
-    } else if (FileUtil.isImage(name)) {
+    } else if (FileHelper.isImage(name)) {
       return imageSvg;
     } else if (
       StringUtil.endWith(name, "zip") ||
diff --git a/src/pages/dashboard/Index.tsx b/src/pages/dashboard/Index.tsx
index fc4087a..f3e0023 100644
--- a/src/pages/dashboard/Index.tsx
+++ b/src/pages/dashboard/Index.tsx
@@ -12,7 +12,7 @@ import Pager from "../../common/model/base/Pager";
 import Dashboard from '../../common/model/dashboard/Dashboard';
 import DateUtil from '../../common/util/DateUtil';
 import SortDirection from "../../common/model/base/SortDirection";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import Matter from '../../common/model/matter/Matter';
 import Lang from "../../common/model/global/Lang";
 import MessageBoxUtil from "../../common/util/MessageBoxUtil";
@@ -346,7 +346,7 @@ export default class Index extends TankComponent<IProps, IState> {
             <div className="text-block">
               <div className="upper">
                 <div className="indicator">{Lang.t("dashboard.totalFileSize")}</div>
-                <div className="amount">{FileUtil.humanFileSize(dashboard.totalFileSize)}</div>
+                <div className="amount">{FileHelper.humanFileSize(dashboard.totalFileSize)}</div>
                 <div>
                   <RatePanel name={Lang.t("dashboard.weekRate")} standardValue={this.standardWeekSize}
                              compareValue={this.compareWeekSize}/>
@@ -355,7 +355,7 @@ export default class Index extends TankComponent<IProps, IState> {
                 </div>
               </div>
               <div className="lower">
-                {Lang.t("dashboard.yesterdayMatterSize")}:{FileUtil.humanFileSize(yesterdayDashboard.fileSize)}
+                {Lang.t("dashboard.yesterdayMatterSize")}:{FileHelper.humanFileSize(yesterdayDashboard.fileSize)}
               </div>
             </div>
           </Col>
diff --git a/src/pages/matter/List.tsx b/src/pages/matter/List.tsx
index 1953fd3..60089cb 100644
--- a/src/pages/matter/List.tsx
+++ b/src/pages/matter/List.tsx
@@ -45,7 +45,7 @@ import ShareDialogModal from "../share/widget/ShareDialogModal";
 import BreadcrumbModel from "../../common/model/base/option/BreadcrumbModel";
 import BreadcrumbPanel from "../widget/BreadcrumbPanel";
 import Lang from "../../common/model/global/Lang";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import SafeUtil from "../../common/util/SafeUtil";
 import MatterSortPanel from "./widget/MatterSortPanel";
 import {
@@ -293,7 +293,7 @@ export default class List extends TankComponent<IProps, IState> {
       MessageBoxUtil.success(Lang.t("matter.uploaded"));
     } else {
       // 上传错误弹出提示框
-      const url = FileUtil.getErrorLogsToCSVUrl(this.uploadErrorLogs);
+      const url = FileHelper.getErrorLogsToCSVUrl(this.uploadErrorLogs);
       Modal.confirm({
         title: Lang.t("matter.uploadInfo"),
         icon: <ExclamationCircleFilled twoToneColor="#FFDC00" />,
diff --git a/src/pages/matter/widget/imageCache/ImageCachePanel.tsx b/src/pages/matter/widget/imageCache/ImageCachePanel.tsx
index 801a50e..6cb6da7 100644
--- a/src/pages/matter/widget/imageCache/ImageCachePanel.tsx
+++ b/src/pages/matter/widget/imageCache/ImageCachePanel.tsx
@@ -11,7 +11,7 @@ import {
   SmallDashOutlined,
 } from "@ant-design/icons";
 import MessageBoxUtil from "../../../../common/util/MessageBoxUtil";
-import FileUtil from "../../../../common/util/FileHelper";
+import FileHelper from "../../../../common/util/FileHelper";
 import DateUtil from "../../../../common/util/DateUtil";
 import Expanding from "../../../widget/Expanding";
 import "./ImageCachePanel.less";
@@ -103,7 +103,7 @@ export default class ImageCachePanel extends TankComponent<IProps, IState> {
                     }
                   />
                   <span className="image-cache-size">
-                    {FileUtil.humanFileSize(imageCache.size)}
+                    {FileHelper.humanFileSize(imageCache.size)}
                   </span>
                   <span className="image-cache-date">
                     {DateUtil.simpleDateHourMinute(imageCache.updateTime)}
diff --git a/src/pages/preference/Edit.tsx b/src/pages/preference/Edit.tsx
index 2524361..7e4c63d 100644
--- a/src/pages/preference/Edit.tsx
+++ b/src/pages/preference/Edit.tsx
@@ -9,7 +9,7 @@ import {Button, Form, Input, InputNumber, Switch} from "antd";
 import {SaveOutlined} from "@ant-design/icons";
 import TankContentCard from "../widget/TankContentCard";
 import Preference from "../../common/model/preference/Preference";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import {FormInstance} from "antd/lib/form";
 import MessageBoxUtil from "../../common/util/MessageBoxUtil";
 import Sun from "../../common/model/global/Sun";
@@ -164,10 +164,10 @@ export default class Edit extends TankComponent<IProps, IState> {
               <span className="pl10">
                 {Lang.t("preference.current")}:
                 {this.formRef && this.formRef.current
-                  ? FileUtil.humanFileSize(
+                  ? FileHelper.humanFileSize(
                       this.formRef.current.getFieldValue("downloadDirMaxSize")
                     )
-                  : FileUtil.humanFileSize(preference.defaultTotalSizeLimit)}
+                  : FileHelper.humanFileSize(preference.defaultTotalSizeLimit)}
               </span>
             </Form.Item>
 
@@ -190,12 +190,12 @@ export default class Edit extends TankComponent<IProps, IState> {
               <span className="pl10">
                 {Lang.t("preference.current")}:
                 {this.formRef && this.formRef.current
-                  ? FileUtil.humanFileSize(
+                  ? FileHelper.humanFileSize(
                       this.formRef.current.getFieldValue(
                         "defaultTotalSizeLimit"
                       )
                     )
-                  : FileUtil.humanFileSize(preference.defaultTotalSizeLimit)}
+                  : FileHelper.humanFileSize(preference.defaultTotalSizeLimit)}
               </span>
             </Form.Item>
 
diff --git a/src/pages/preference/Index.tsx b/src/pages/preference/Index.tsx
index 8adaf43..1b4c9fd 100644
--- a/src/pages/preference/Index.tsx
+++ b/src/pages/preference/Index.tsx
@@ -14,7 +14,7 @@ import {
 import InfoCell from "../widget/InfoCell";
 import Preference from "../../common/model/preference/Preference";
 import TankContentCard from "../widget/TankContentCard";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import ImagePreviewer from "../widget/previewer/ImagePreviewer";
 import Lang from "../../common/model/global/Lang";
 import SingleTextModal from "../widget/SingleTextModal";
@@ -162,11 +162,11 @@ export default class Index extends TankComponent<IProps, IState> {
             </InfoCell>
 
             <InfoCell name={Lang.t("preference.zipMaxSizeLimit")}>
-              {FileUtil.humanFileSize(this.preference.downloadDirMaxSize)}
+              {FileHelper.humanFileSize(this.preference.downloadDirMaxSize)}
             </InfoCell>
 
             <InfoCell name={Lang.t("preference.userDefaultSizeLimit")}>
-              {FileUtil.humanFileSize(this.preference.defaultTotalSizeLimit)}
+              {FileHelper.humanFileSize(this.preference.defaultTotalSizeLimit)}
             </InfoCell>
 
             <InfoCell name={Lang.t("preference.matterBinDefaultSaveDay")}>
diff --git a/src/pages/user/Detail.tsx b/src/pages/user/Detail.tsx
index 235a33a..f592ea0 100644
--- a/src/pages/user/Detail.tsx
+++ b/src/pages/user/Detail.tsx
@@ -11,7 +11,7 @@ import TankContentCard from "../widget/TankContentCard";
 import { Link, RouteComponentProps } from "react-router-dom";
 import ImagePreviewer from "../widget/previewer/ImagePreviewer";
 import { UserRole, UserRoleMap } from "../../common/model/user/UserRole";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import { UserStatus, UserStatusMap } from "../../common/model/user/UserStatus";
 import BrowserUtil from "../../common/util/BrowserUtil";
 import SingleTextModal from "../widget/SingleTextModal";
@@ -207,15 +207,15 @@ export default class Detail extends TankComponent<IProps, IState> {
           </InfoCell>
 
           <InfoCell name={Lang.t("user.singleFileSizeLimit")}>
-            {FileUtil.humanFileSize(currentUser.sizeLimit)}
+            {FileHelper.humanFileSize(currentUser.sizeLimit)}
           </InfoCell>
 
           <InfoCell name={Lang.t("user.totalFileSizeLimit")}>
-            {FileUtil.humanFileSize(currentUser.totalSizeLimit)}
+            {FileHelper.humanFileSize(currentUser.totalSizeLimit)}
           </InfoCell>
 
           <InfoCell name={Lang.t("user.totalFileSize")}>
-            {FileUtil.humanFileSize(currentUser.totalSize)}
+            {FileHelper.humanFileSize(currentUser.totalSize)}
           </InfoCell>
 
           <InfoCell name={Lang.t("user.status")}>
diff --git a/src/pages/user/Edit.tsx b/src/pages/user/Edit.tsx
index 067ba4e..a90a074 100644
--- a/src/pages/user/Edit.tsx
+++ b/src/pages/user/Edit.tsx
@@ -6,7 +6,7 @@ import {Button, Form, Input, InputNumber, Select} from 'antd';
 import User from "../../common/model/user/User";
 import Moon from "../../common/model/global/Moon";
 import TankTitle from "../widget/TankTitle";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import TankContentCard from "../widget/TankContentCard";
 import {FormInstance} from "antd/lib/form";
 import {SaveOutlined} from "@ant-design/icons/lib";
@@ -224,8 +224,8 @@ export default class Edit extends TankComponent<IProps, IState> {
               <span
                 className="pl10"> {Lang.t("user.current")}:
                 {(this.formRef && this.formRef.current) ?
-                  FileUtil.humanFileSize(this.formRef.current.getFieldValue("sizeLimit"))
-                  : FileUtil.humanFileSize(currentUser.sizeLimit)}
+                  FileHelper.humanFileSize(this.formRef.current.getFieldValue("sizeLimit"))
+                  : FileHelper.humanFileSize(currentUser.sizeLimit)}
               </span>
             </Form.Item>
 
@@ -244,8 +244,8 @@ export default class Edit extends TankComponent<IProps, IState> {
               <span
                 className="pl10"> {Lang.t("user.current")}:
                 {(this.formRef && this.formRef.current) ?
-                  FileUtil.humanFileSize(this.formRef.current.getFieldValue("totalSizeLimit"))
-                  : FileUtil.humanFileSize(currentUser.totalSizeLimit)}
+                  FileHelper.humanFileSize(this.formRef.current.getFieldValue("totalSizeLimit"))
+                  : FileHelper.humanFileSize(currentUser.totalSizeLimit)}
               </span>
             </Form.Item>
 
diff --git a/src/pages/user/List.tsx b/src/pages/user/List.tsx
index 2f29405..9a726bf 100644
--- a/src/pages/user/List.tsx
+++ b/src/pages/user/List.tsx
@@ -4,7 +4,7 @@ import "./List.less";
 import SortDirection from "../../common/model/base/SortDirection";
 import Pager from "../../common/model/base/Pager";
 import StringUtil from "../../common/util/StringUtil";
-import FileUtil from "../../common/util/FileHelper";
+import FileHelper from "../../common/util/FileHelper";
 import DateUtil from "../../common/util/DateUtil";
 import FilterPanel from "../widget/filter/FilterPanel";
 import TableEmpty from "../widget/TableEmpty";
@@ -157,21 +157,21 @@ export default class List extends TankComponent<IProps, IState> {
         title: Lang.t("user.singleFileSizeLimit"),
         dataIndex: "sizeLimit",
         render: (text: any, record: User, index: number): React.ReactNode => (
-          <span>{FileUtil.humanFileSize(record.sizeLimit)}</span>
+          <span>{FileHelper.humanFileSize(record.sizeLimit)}</span>
         ),
       },
       {
         title: Lang.t("user.totalFileSize"),
         dataIndex: "totalSize",
         render: (text: any, record: User, index: number): React.ReactNode => (
-          <span>{FileUtil.humanFileSize(record.totalSize)}</span>
+          <span>{FileHelper.humanFileSize(record.totalSize)}</span>
         ),
       },
       {
         title: Lang.t("user.totalFileSizeLimit"),
         dataIndex: "totalSizeLimit",
         render: (text: any, record: User, index: number): React.ReactNode => (
-          <span>{FileUtil.humanFileSize(record.totalSizeLimit)}</span>
+          <span>{FileHelper.humanFileSize(record.totalSizeLimit)}</span>
         ),
       },
       {
diff --git a/src/pages/user/widget/MobileUserPanel.tsx b/src/pages/user/widget/MobileUserPanel.tsx
index fcf7770..f5ebb6e 100644
--- a/src/pages/user/widget/MobileUserPanel.tsx
+++ b/src/pages/user/widget/MobileUserPanel.tsx
@@ -6,7 +6,7 @@ import User from "../../../common/model/user/User";
 import { Link } from "react-router-dom";
 import { UserRoleMap } from "../../../common/model/user/UserRole";
 import { Tag, Tooltip } from "antd";
-import FileUtil from "../../../common/util/FileHelper";
+import FileHelper from "../../../common/util/FileHelper";
 import {
   UserStatus,
   UserStatusMap,
@@ -77,13 +77,13 @@ export default class MobileUserPanel extends TankComponent<IProps, IState> {
           {this.showMore ? (
             <div className="ml10 panel-detail">
               <InfoCell name={Lang.t("user.singleFileSizeLimit")}>
-                <span>{FileUtil.humanFileSize(user.sizeLimit)}</span>
+                <span>{FileHelper.humanFileSize(user.sizeLimit)}</span>
               </InfoCell>
               <InfoCell name={Lang.t("user.totalFileSize")}>
-                <span>{FileUtil.humanFileSize(user.totalSize)}</span>
+                <span>{FileHelper.humanFileSize(user.totalSize)}</span>
               </InfoCell>
               <InfoCell name={Lang.t("user.totalFileSizeLimit")}>
-                <span>{FileUtil.humanFileSize(user.totalSizeLimit)}</span>
+                <span>{FileHelper.humanFileSize(user.totalSizeLimit)}</span>
               </InfoCell>
               <InfoCell name={Lang.t("user.status")}>
                 <Tag color={UserStatusMap[user.status].color}>
diff --git a/src/pages/widget/previewer/BrowserPreviewer.tsx b/src/pages/widget/previewer/BrowserPreviewer.tsx
index 65d13bd..57e9ac7 100644
--- a/src/pages/widget/previewer/BrowserPreviewer.tsx
+++ b/src/pages/widget/previewer/BrowserPreviewer.tsx
@@ -1,7 +1,7 @@
 import "./BrowserPreviewer.less"
 import React from "react";
 import * as ReactDOM from 'react-dom';
-import FileUtil from "../../../common/util/FileHelper";
+import FileHelper from "../../../common/util/FileHelper";
 import {CloseOutlined} from "@ant-design/icons";
 
 interface IProps {
@@ -70,7 +70,7 @@ export default class BrowserPreviewer extends React.Component<IProps, IState> {
         </div>
 
         <div className="middle-part">
-          {this.props.name}({FileUtil.humanFileSize(this.props.size)})
+          {this.props.name}({FileHelper.humanFileSize(this.props.size)})
         </div>
 
         <div className="right-part">