c++批量将pdf转换成txt

你可以使用第三方库来实现将 PDF 转换成 TXT，比如 Poppler 和 Ghostscript。以下是基于 Poppler 的示例代码：

#include <iostream>
#include <poppler/cpp/poppler-document.h>
#include <poppler/cpp/poppler-page.h>

int main(int argc, char* argv[]) {
    if (argc < 2) {
        std::cerr << "Usage: " << argv[0] << " <input-pdf-files>" << std::endl;
        return 1;
    }

    for (int i = 1; i < argc; ++i) {
        try {
            poppler::document doc(poppler::document::load_from_file(argv[i]));
            if (!doc.is_valid()) {
                std::cerr << "Invalid PDF file: " << argv[i] << std::endl;
                continue;
            }

            std::string txt;
            for (int j = 0; j < doc.get_page_count(); ++j) {
                const auto page = doc.create_page(j);
                txt += page->text().to_latin1();
            }

            const std::string output_filename = std::string(argv[i]) + ".txt";
            std::ofstream output_file(output_filename);
            output_file << txt;
            std::cout << "Converted " << argv[i] << " to " << output_filename << std::endl;
        } catch (std::exception& e) {
            std::cerr << "Error while converting " << argv[i] << ": " << e.what() << std::endl;
        }
    }

    return 0;
}

你可以将以上代码保存为 `pdf2txt.cpp`，使用以下命令编译：

g++ pdf2txt.cpp -o pdf2txt $(pkg-config --cflags --libs poppler-cpp)

之后，你可以使用以下命令将所有 PDF 文件转换成 TXT 文件：

./pdf2txt *.pdf