c++文件夹存在判断

（1）Win API

bool CheckFolderExist(const string &strPath)
{
    WIN32_FIND_DATA wfd;
    bool rValue = false;
    HANDLE hFind = FindFirstFile(strPath.c_str(), &wfd);
    if ((hFind != INVALID_HANDLE_VALUE) && (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
    {
        rValue = true;  
    }
    FindClose(hFind);
    return rValue;
}

（2）Win SHell

PathFileExists("yourfile") 

使用时加上：#include "Shlwapi.h" #pragma comment(lib,"Shlwapi.lib")

（3）Win API

bool FileExists(LPCTSTR lpszFileName, bool bIsDirCheck)
{
DWORD dwAttributes = GetFileAttributes(lpszFileName);
    if(dwAttributes == 0xFFFFFFFF)
{
        return false;
}

if((dwAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)
{
   return bIsDirCheck;
}
else
{
   return !bIsDirCheck;
}
}

(4)使用boost的filesystem类库的exists函数

#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/filesystem/convenience.hpp>

int GetFilePath(std::string &strFilePath)
{
    string strPath;
    int nRes = 0;

    //指定路径           
    strPath = "D:\myTest\Test1\Test2";
    namespace fs = boost::filesystem;

    //路径的可移植
    fs::path full_path( fs::initial_path() );
    full_path = fs::system_complete( fs::path(strPath, fs::native ) );
    //判断各级子目录是否存在，不存在则需要创建
    if ( !fs::exists( full_path ) )
    {
        // 创建多层子目录
        bool bRet = fs::create_directories(full_path);
        if (false == bRet)
        {
            return -1;
        }

    }
    strFilePath = full_path.native_directory_string();

    return 0;
}