如何读取和打印带有 Unicode 字符/符号的文件路径？

Question

我在读取 ASCII 字符的文件路径时没有问题，但在读取 Unicode 字符的文件路径时遇到问题。我试图确保代码正确编码以支持 unicode 字符，但它仍然不起作用。如何读取带有unicode字符或符号的文件和文件夹的路径？

#include <iostream>
#include <fstream>
#include <Windows.h>
#include <string>
#include <vector>
#include <queue>

// Function to list files in BFS order
void ListFilesBFS(const std::wstring& inputDirectoryPath, std::wofstream& out) {
    std::queue<std::wstring> pathsQueue;
    pathsQueue.push(inputDirectoryPath);

    // Loop until all directories have been processed
    while (!pathsQueue.empty()) {
        // Get the current directory path from the front of the queue
        std::wstring currentPath = pathsQueue.front();
        pathsQueue.pop();

        // Find the first file or directory in the current directory
        WIN32_FIND_DATAW findFileData;
        HANDLE hFind = FindFirstFileW((currentPath + L"\\*").c_str(), &findFileData);
        if (hFind == INVALID_HANDLE_VALUE) {
            // If unable to traverse the directory, print error and continue to next iteration
            std::wcerr << L"Error traversing directory: " << currentPath << std::endl;
            continue;
        }

        // Iterate through all files and directories in the current directory
        do {
            // Get the name of the file or directory
            std::wstring fileName = findFileData.cFileName;
            // Ignore '.' and '..' directories
            if (fileName != L"." && fileName != L"..") {
                // Construct the full path of the file or directory
                std::wstring fullPath = currentPath + L"\\" + fileName;

                // Construct the string containing file information
                std::wstring fileInfo = fullPath;

                // Write the file information string to the output file stream
                out << fileInfo << std::endl;
            
                // If it's a directory, add it to the queue for further traversal
                if (findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
                    pathsQueue.push(fullPath);
                }
            }
        } while (FindNextFileW(hFind, &findFileData) != 0);

        // Close the handle to the directory
        FindClose(hFind);
    }
}

// Entry point of the program
int wmain(int argc, wchar_t* argv[]) {
    // command-line argument: "lister.exe <input_directory_path> <output_file_path>"

    // Get the input directory path and output file path
    std::wstring inputDirectoryPath = argv[2];
    std::wstring outputFile = argv[3];

    // Open the output file
    std::wofstream out(outputFile);
    if (!out.is_open()) {
        std::wcerr << L"Unable to open output file." << std::endl;
        return 1;
    }

    // Call ListFilesBFS function to list files in BFS order
    ListFilesBFS(inputDirectoryPath, out);

    // Close the output file
    out.close();

    return 0;
}

Answer 1

您需要设置输出模式来处理 Windows UTF-16 字符：

#include <fcntl.h>
#include <io.h>

..
main()
{
    _setmode(_fileno(stdout), _O_U16TEXT);
    _setmode(_fileno(stderr), _O_U16TEXT);
...