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