C++解壓與文件壓縮參數配置

在C++中，我們可以使用第三方庫來實現文件的解壓和壓縮

1. 首先，你需要安裝一個名為minizip的庫。這個庫是zlib庫的一個擴展，用于處理ZIP文件。你可以從這里下載它：https://github.com/madler/minizip

2. 將minizip庫添加到你的C++項目中。具體方法取決于你使用的開發環境和構建系統。例如，如果你使用的是CMake，你可以在CMakeLists.txt文件中添加以下內容：

find_package(minizip REQUIRED)
include_directories(${MINIZIP_INCLUDE_DIRS})
target_link_libraries(your_target_name ${MINIZIP_LIBRARIES})

3. 使用minizip庫實現文件解壓和壓縮。以下是一個簡單的示例：

解壓ZIP文件：

#include <iostream>
#include <fstream>
#include <vector>
#include <minizip/unzip.h>

bool UnzipFile(const std::string& zipFilePath, const std::string& destDirectory) {
    unzFile uf = unzOpen(zipFilePath.c_str());
    if (uf == nullptr) {
        std::cerr << "Error opening zip file: " << zipFilePath << std::endl;
        return false;
    }

    unz_global_info gi;
    if (unzGetGlobalInfo(uf, &gi) != UNZ_OK) {
        std::cerr << "Error getting zip file info: " << zipFilePath << std::endl;
        unzClose(uf);
        return false;
    }

    for (unsigned int i = 0; i < gi.number_of_files; ++i) {
        unz_file_info fi;
        if (unzGetCurrentFileInfo(uf, &fi, nullptr, 0, nullptr, 0, nullptr, 0) != UNZ_OK) {
            std::cerr << "Error getting file info: " << zipFilePath << std::endl;
            continue;
        }

        std::vector<char> buffer(fi.uncompressed_size);
        if (unzReadCurrentFile(uf, buffer.data(), fi.uncompressed_size) != UNZ_OK) {
            std::cerr << "Error reading file: " << zipFilePath << std::endl;
            continue;
        }

        std::string fileName = fi.filename;
        std::string destPath = destDirectory + "/" + fileName;
        std::ofstream outputFile(destPath, std::ios::binary);
        if (!outputFile) {
            std::cerr << "Error creating output file: " << destPath << std::endl;
            continue;
        }

        outputFile.write(buffer.data(), fi.uncompressed_size);
        if (!outputFile) {
            std::cerr << "Error writing to output file: " << destPath << std::endl;
        }
    }

    unzClose(uf);
    return true;
}

壓縮文件：

#include <iostream>
#include <fstream>
#include <vector>
#include <minizip/zip.h>

bool ZipFile(const std::string& zipFilePath, const std::string& srcDirectory) {
    zipFile zf = zipOpen(zipFilePath.c_str(), APPEND_STATUS_CREATE);
    if (zf == nullptr) {
        std::cerr << "Error opening zip file: " << zipFilePath << std::endl;
        return false;
    }

    for (const auto& entry : std::filesystem::recursive_directory_iterator(srcDirectory)) {
        if (entry.is_regular_file()) {
            std::string relativePath = srcDirectory / entry.path();
            zipOpenNewFileInZip(zf, relativePath.c_str(), nullptr, 0, nullptr, 0, Z_DEFLATED, Z_DEFAULT_COMPRESSION);
            std::ifstream inputStream(entry.path(), std::ios::binary);
            std::vector<char> buffer((std::istreambuf_iterator<char>(inputStream)), std::istreambuf_iterator<char>());
            zipWriteInFileInZip(zf, buffer.data(), buffer.size());
            zipCloseFileInZip(zf);
        }
    }

    zipClose(zf);
    return true;
}

這些示例展示了如何使用minizip庫來解壓和壓縮ZIP文件。你可以根據需要修改這些函數以滿足你的需求。