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检查flutter环境
flutter doctor按照提示缺失环境即可
构建web版产品
flutter build web如果需要编译成windows版，则需要下载 Visual Studio和对应C++的桌面开发套件(工作负载)
如果是使用idea新建的flutter项目，需要执行
flutter create --platforms=windows,macos,linux .以便支持windows应用
开发过程中需要运行windows版本的话，终端执行
flutter run -d windows构建windows产品
flutter build windows