flutter 解压 zip 中文乱码问题处理

前言

很简单的一个 zip 包解压缩的功能，但是 windows 平台中文显示乱码，很糟心，搜了一圈没找到现成的方法，在此贴上我的解决方式。

实现

导入需要的包

flutter pub add archiveflutter pub add fast_gbkflutter pub add path

代码如下：

import 'dart:io';
import 'package:fast_gbk/fast_gbk.dart';
import 'package:archive/archive.dart';
import 'package:path/path.dart' as p;void main() {unzip('G:/testUpdate/111.zip', 'G:/testUpdate/1');
}void unzip(String inputPath, String outputPath) {var archive = zipDecode(inputPath);for (final file in archive) {final filename = file.name;final filePath = p.join(outputPath, filename);if (!file.isFile && !file.isSymbolicLink) {Directory(filePath).createSync(recursive: true);continue;}if (file.isSymbolicLink) {final link = Link(filePath);link.createSync(p.normalize(file.nameOfLinkedFile), recursive: true);} else {final data = file.content as List<int>;final newFile = File(filePath);newFile.createSync(recursive: true);newFile.writeAsBytesSync(data);}}
}// 由于 archive 包直接用会乱码，这里加一下对于 gbk 编码的处理
Archive zipDecode(String inputPath) {final zipFile = File(inputPath);final bytes = zipFile.readAsBytesSync();final inputStream = InputStream(bytes);// final inputStream = InputFileStream('G:/testUpdate/111.zip');var directory = ZipDirectory.read(inputStream);final archive = Archive();for (final zfh in directory.fileHeaders) {final zf = zfh.file!;// The attributes are stored in base 8final mode = zfh.externalFileAttributes!;final compress = zf.compressionMethod != ZipFile.STORE;//dynamic content = zf.rawContent;var file = ArchiveFile(zf.filename, zf.uncompressedSize!, zf, zf.compressionMethod);file.mode = mode >> 16;// see https://github.com/brendan-duncan/archive/issues/21// UNIX systems has a creator version of 3 decimal at 1 byte offsetif (zfh.versionMadeBy >> 8 == 3) {file.isFile = false;final fileType = file.mode & 0xF000;switch (fileType) {case 0x8000:case 0x0000: // No determination can be made so we assume it's a file.file.isFile = true;break;case 0xA000:file.isSymbolicLink = true;break;default:}} else {file.isFile = !file.name.endsWith('/');}file.crc32 = zf.crc32;file.compress = compress;file.lastModTime = zf.lastModFileDate << 16 | zf.lastModFileTime;final needGbkDecode = zf.flags & 2048 == 0;if (needGbkDecode) {file.name = gbk.decode(zf.filename.codeUnits);}archive.addFile(file);}return archive;
}