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;
}