void testFileSystem()

{

    boost::filesystem::path path("/test/test1");   //初始化

    boost::filesystem::path old_cpath = boost::filesystem::current_path(); //取得当前程序所在文件夹

    boost::filesystem::path parent_path = old_cpath.parent_path();//取old_cpath的上一层父文件夹路径

    boost::filesystem::path file_path = old_cpath / "file"; //path支持重载/运算符

    std::string file_dir = file_path.string();

    if (boost::filesystem::exists(file_path))  //推断文件存在性

    {

        std::string strPath = file_path.string();

        int x = ;

    }

    else

    {

        //文件夹不存在;

        boost::filesystem::create_directory(file_path);  //文件夹不存在。创建

    }

    bool bIsDirectory = boost::filesystem::is_directory(file_path); //推断file_path是否为文件夹

    boost::filesystem::recursive_directory_iterator beg_iter(file_path);

    boost::filesystem::recursive_directory_iterator end_iter;

    for (; beg_iter != end_iter; ++beg_iter)

    {

        if (boost::filesystem::is_directory(*beg_iter))

        {

            continue;

        }

        else

        {

            std::string strPath = beg_iter->path().string();  //遍历出来的文件名称

            int x = ;

        }

    }

    boost::filesystem::path new_file_path = file_path / "test.txt";

    if (boost::filesystem::is_regular_file(new_file_path))    //推断是否为普通文件

    {

        UINT sizefile = boost::filesystem::file_size(new_file_path);  //文件大小(字节)

        int x = ;

    }

    boost::filesystem::remove(new_file_path);//删除文件new_file_path

}

// recusively copy file or directory from $src to $dst

void CopyFiles(const boost::filesystem::path &src, const boost::filesystem::path &dst)

{

    if (!boost::filesystem::exists(dst))

    {

        boost::filesystem::create_directories(dst);

    }

    for (boost::filesystem::directory_iterator it(src); it != boost::filesystem::directory_iterator(); ++it)

    {

        const boost::filesystem::path newSrc = src / it->path();

        const boost::filesystem::path newDst = dst / it->path();

        if (boost::filesystem::is_directory(newSrc))

        {

            CopyFiles(newSrc, newDst);

        }

        else if (boost::filesystem::is_regular_file(newSrc))

        {

            boost::filesystem::copy_file(newSrc, newDst, boost::filesystem::copy_option::overwrite_if_exists);

        }

        else

        {

            _ftprintf(stderr, _T("Error: unrecognized file - %s"), newSrc.string().c_str());

        }

    }

}

bool CopyDirectory(const std::string &strSourceDir, const std::string &strDestDir)

{

    boost::filesystem::recursive_directory_iterator end; //设置遍历结束标志，用recursive_directory_iterator即可循环的遍历目录

    boost::system::error_code ec;

    for (boost::filesystem::recursive_directory_iterator pos(strSourceDir); pos != end; ++pos)

    {

        //过滤掉目录和子目录为空的情况

        if (boost::filesystem::is_directory(*pos))

            continue;

        std::string strAppPath = boost::filesystem::path(*pos).string();

        std::string strRestorePath;

        //replace_first_copy在algorithm/string头文件中，在strAppPath中查找strSourceDir字符串，找到则用strDestDir替换，替换后的字符串保存在一个输出迭代器中

        boost::algorithm::replace_first_copy(std::back_inserter(strRestorePath), strAppPath, strSourceDir, strDestDir);

        if (!boost::filesystem::exists(boost::filesystem::path(strRestorePath).parent_path()))

        {

            boost::filesystem::create_directories(boost::filesystem::path(strRestorePath).parent_path(), ec);

        }

        boost::filesystem::copy_file(strAppPath, strRestorePath, boost::filesystem::copy_option::overwrite_if_exists, ec);

    }

    if (ec)

    {

        return false;

    }

    return true;

}