文件管理子系统JS API变更

OpenHarmony 3.1 Release版本相较于OpenHarmony 3.0 LTS版本，文件管理子系统的API变更如下:

接口变更

模块名 类名 方法/属性/枚举/常量 变更类型
ohos.statfs Statfs function getTotalBytes(path: string, callback: AsyncCallback): void;
function getTotalBytes(path: string): Promise;		 新增
ohos.statfs Statfs function getFreeBytes(path: string, callback: AsyncCallback): void;
function getFreeBytes(path: string): Promise;		 新增
ohos.fileio Watcher stop(): Promise;
stop(callback: AsyncCallback): void;		 新增
ohos.fileio ReadOut buffer: ArrayBuffer; 新增
ohos.fileio ReadOut offset: number; 新增
ohos.fileio ReadOut bytesRead: number; 新增
ohos.fileio Stream read(buffer: ArrayBuffer, options?: { position?: number; offset?: number; length?: number; }): Promise;
read(buffer: ArrayBuffer, callback: AsyncCallback): void;
read(buffer: ArrayBuffer, options: { position?: number; offset?: number; length?: number; }, callback: AsyncCallback): void;		 新增
ohos.fileio Stream write(buffer: ArrayBuffer | string, options?: { offset?: number; length?: number; position?: number; encoding?: string; }): Promise;
write(buffer: ArrayBuffer | string, callback: AsyncCallback): void;
write(buffer: ArrayBuffer | string, options: { offset?: number; length?: number; position?: number; encoding?: string; }, callback: AsyncCallback): void;		 新增
ohos.fileio Stream flush(): Promise;
flush(callback: AsyncCallback): void;		 新增
ohos.fileio Stream close(): Promise;
close(callback: AsyncCallback): void;		 新增
ohos.fileio Dir close(): Promise;
close(callback: AsyncCallback): void;		 新增
ohos.fileio Dir read(): Promise;
read(callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function createWatcher(filename: string, events: number, callback: AsyncCallback): Watcher; 新增
ohos.fileio fileIO function write(fd: number, buffer: ArrayBuffer | string, options?: { offset?: number; length?: number; position?: number; encoding?: string; }): Promise;
function write(fd: number, buffer: ArrayBuffer | string, callback: AsyncCallback): void;
function write(fd: number, buffer: ArrayBuffer | string, options: { offset?: number; length?: number; position?: number; encoding?: string; }, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function unlink(path: string): Promise;
function unlink(path: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function truncate(path: string, len?: number): Promise;
function truncate(path: string, callback: AsyncCallback): void;
function truncate(path: string, len: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function symlinkSync(target: string, srcPath: string): void; 新增
ohos.fileio fileIO function symlink(target: string, srcPath: string): Promise;
function symlink(target: string, srcPath: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function stat(path: string): Promise;
function stat(path: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function rmdir(path: string): Promise;
function rmdir(path: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function rename(oldPath: string, newPath: string): Promise;
function rename(oldPath: string, newPath: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function read(fd: number, buffer: ArrayBuffer, options?: { offset?: number; length?: number; position?: number; }): Promise
function read(fd: number, buffer: ArrayBuffer, callback: AsyncCallback): void;
function read(fd: number, buffer: ArrayBuffer, options: { offset?: number; length?: number; position?: number; }, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function readTextSync(filePath: string, options?: { position?: number; length?: number; encoding?: string; }): string; 新增
ohos.fileio fileIO function readText(filePath: string, options?: { position?: number; length?: number; encoding?: string; }): Promise;
function readText(filePath: string, options: { position?: number; length?: number; encoding?: string; }, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function opendir(path: string): Promise;
function opendir(path: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function open(path: string, flags?: number, mode?: number): Promise;
function open(path: string, callback: AsyncCallback): void;
function open(path: string, flags: number, callback: AsyncCallback): void;
function open(path: string, flags: number, mode: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function mkdtempSync(prefix: string): string; 新增
ohos.fileio fileIO function mkdtemp(prefix: string): Promise;
function mkdtemp(prefix: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function mkdir(path: string, mode?: number): Promise;
function mkdir(path: string, callback: AsyncCallback): void;
function mkdir(path: string, mode: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function lstatSync(path: string): Stat; 新增
ohos.fileio fileIO function lstat(path: string): Promise;
function lstat(path: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function lchownSync(path: string, uid: number, gid: number): void; 新增
ohos.fileio fileIO function lchown(path: string, uid: number, gid: number): Promise;
function lchown(path: string, uid: number, gid: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function hash(path: string, algorithm: string): Promise;
function hash(path: string, algorithm: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function fdopenStream(fd: number, mode: string): Promise;
function fdopenStream(fd: number, mode: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function fchmod(fd: number, mode: number): Promise;
function fchmod(fd: number, mode: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function fchown(fd: number, uid: number, gid: number): Promise;
function fchown(fd: number, uid: number, gid: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function fdatasyncSync(fd: number): void; 新增
ohos.fileio fileIO function fdatasync(fd: number): Promise;
function fdatasync(fd: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function fstat(fd: number): Promise;
function fstat(fd: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function fsync(fd: number): Promise;
function fsync(fd: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function ftruncate(fd: number, len?: number): Promise;
function ftruncate(fd: number, callback: AsyncCallback): void;
function ftruncate(fd: number, len: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function chmod(path: string, mode: number): Promise;
function chmod(path: string, mode: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function chown(path: string, uid: number, gid: number): Promise;
function chown(path: string, uid: number, gid: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function createStream(path: string, mode: string): Promise;
function createStream(path: string, mode: string, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function copyFile(src: string | number, dest: string | number, mode?: number): Promise;
function copyFile(src: string | number, dest: string | number, callback: AsyncCallback): void;
function copyFile(src: string | number, dest: string | number, mode: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function close(fd: number): Promise;
function close(fd: number, callback: AsyncCallback): void;		 新增
ohos.fileio fileIO function access(path: string, mode?: number): Promise;
function access(path: string, callback: AsyncCallback): void;
function access(path: string, mode: number, callback: AsyncCallback): void;		 新增
ohos.document document function show(uri: string, type: string): Promise;
function show(uri: string, type: string, callback: AsyncCallback): void;		 新增
ohos.document document function choose(types?: string[]): Promise;
function choose(callback: AsyncCallback): void;
function choose(types: string[], callback: AsyncCallback): void;		 新增