{"id":67764,"date":"2026-01-29T06:17:09","date_gmt":"2026-01-28T22:17:09","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/67764.html"},"modified":"2026-01-29T06:17:09","modified_gmt":"2026-01-28T22:17:09","slug":"c%e9%ab%98%e6%95%88%e6%97%a5%e5%bf%97%e4%b8%8e%e5%91%bd%e4%bb%a4%e8%a1%8c%e8%a7%a3%e6%9e%90%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/67764.html","title":{"rendered":"C++\u9ad8\u6548\u65e5\u5fd7\u4e0e\u547d\u4ee4\u884c\u89e3\u6790\u5b9e\u6218"},"content":{"rendered":"

\u597d\u7684，\u8fd9\u662f\u4e00\u4e2a\u5173\u4e8e\u5982\u4f55\u5728 C++ \u9879\u76ee\u4e2d\u7ed3\u5408\u4f7f\u7528 gflags \u8fdb\u884c\u547d\u4ee4\u884c\u53c2\u6570\u89e3\u6790\u548c spdlog \u5b9e\u73b0\u9ad8\u6027\u80fd\u65e5\u5fd7\u8bb0\u5f55\u7684\u5b9e\u6218\u6307\u5357\u3002<\/p>\n

\u76ee\u6807： \u8ba9\u7a0b\u5e8f\u80fd\u591f\u65b9\u4fbf\u5730\u901a\u8fc7\u547d\u4ee4\u884c\u914d\u7f6e\u53c2\u6570，\u5e76\u5c06\u8fd0\u884c\u4fe1\u606f\u9ad8\u6548\u3001\u7075\u6d3b\u5730\u8bb0\u5f55\u5230\u65e5\u5fd7\u4e2d\u3002<\/p>\n

\u6838\u5fc3\u7ec4\u4ef6：<\/p>\n

  • gflags: Google \u7684\u547d\u4ee4\u884c\u6807\u5fd7\u5e93，\u7528\u4e8e\u89e3\u6790\u548c\u5b58\u50a8\u547d\u4ee4\u884c\u53c2\u6570\u3002<\/li>\n
  • spdlog: \u4e00\u4e2a\u9ad8\u6027\u80fd\u3001\u529f\u80fd\u4e30\u5bcc\u7684 C++ \u65e5\u5fd7\u5e93\u3002<\/li>\n

    \u6b65\u9aa4\u6307\u5357：<\/p>\n

    1. \u5f15\u5165\u4f9d\u8d56<\/p>\n

    \u786e\u4fdd\u4f60\u7684\u9879\u76ee\u5df2\u7ecf\u5305\u542b\u4e86 gflags \u548c spdlog \u5e93\u3002\u53ef\u4ee5\u901a\u8fc7\u5305\u7ba1\u7406\u5668（\u5982 vcpkg, conan）\u6216\u76f4\u63a5\u4e0b\u8f7d\u6e90\u7801\u7f16\u8bd1\u96c6\u6210\u3002<\/p>\n

    2. \u5b9a\u4e49\u547d\u4ee4\u884c\u53c2\u6570 (\u4f7f\u7528 gflags)<\/p>\n

    \u5728\u4f60\u7684\u4e3b\u7a0b\u5e8f\u6587\u4ef6（\u5982 main.cpp）\u6216\u4e13\u95e8\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d，\u4f7f\u7528 DEFINE_xxx \u5b8f\u6765\u5b9a\u4e49\u4f60\u9700\u8981\u7684\u547d\u4ee4\u884c\u53c2\u6570\u3002\u5e38\u7528\u7c7b\u578b\u6709：<\/p>\n

    #include <gflags\/gflags.h><\/p>\n

    \/\/ \u5b9a\u4e49\u5b57\u7b26\u4e32\u53c2\u6570，\u9ed8\u8ba4\u503c "info"， \u63cf\u8ff0 "\u65e5\u5fd7\u7ea7\u522b"
    \nDEFINE_string(log_level, "info", "\u65e5\u5fd7\u7ea7\u522b (trace, debug, info, warn, error, critical, off)");<\/p>\n

    \/\/ \u5b9a\u4e49\u6574\u6570\u53c2\u6570，\u9ed8\u8ba4\u503c 1048576， \u63cf\u8ff0 "\u65e5\u5fd7\u961f\u5217\u5927\u5c0f"
    \nDEFINE_int32(log_queue_size, 1048576, "\u5f02\u6b65\u65e5\u5fd7\u961f\u5217\u5927\u5c0f（\u5b57\u8282）");<\/p>\n

    \/\/ \u5b9a\u4e49\u5e03\u5c14\u53c2\u6570，\u9ed8\u8ba4\u503c true， \u63cf\u8ff0 "\u662f\u5426\u542f\u7528\u5f02\u6b65\u65e5\u5fd7"
    \nDEFINE_bool(log_async, true, "\u542f\u7528\u5f02\u6b65\u65e5\u5fd7\u8bb0\u5f55");<\/p>\n

    \/\/ \u5b9a\u4e49\u6587\u4ef6\u8def\u5f84\u53c2\u6570，\u9ed8\u8ba4\u503c\u7a7a， \u63cf\u8ff0 "\u65e5\u5fd7\u6587\u4ef6\u8def\u5f84"
    \nDEFINE_string(log_file, "", "\u65e5\u5fd7\u6587\u4ef6\u8def\u5f84（\u7a7a\u5219\u8f93\u51fa\u5230\u63a7\u5236\u53f0）");<\/p>\n

    \/\/ \u5176\u4ed6\u9700\u8981\u7684\u53c2\u6570…<\/p>\n

    3. \u521d\u59cb\u5316 gflags \u548c \u89e3\u6790\u547d\u4ee4\u884c<\/p>\n

    \u5728 main \u51fd\u6570\u5f00\u59cb\u5904，\u521d\u59cb\u5316 gflags \u5e76\u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570：<\/p>\n

    int main(int argc, char** argv) {
    \n \/\/ \u521d\u59cb\u5316 gflags，\u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570
    \n gflags::ParseCommandLineFlags(&argc, &argv, true);
    \n \/\/ true \u8868\u793a\u79fb\u9664\u5df2\u89e3\u6790\u7684\u6807\u5fd7，argv \u53ea\u4fdd\u7559\u975e\u6807\u5fd7\u53c2\u6570<\/p>\n

    \/\/ … \u540e\u7eed\u7a0b\u5e8f\u903b\u8f91 …
    \n}<\/p>\n

    4. \u521d\u59cb\u5316 spdlog \u65e5\u5fd7\u7cfb\u7edf (\u57fa\u4e8e gflags \u53c2\u6570)<\/p>\n

    \u4f7f\u7528 gflags \u5b9a\u4e49\u7684\u53c2\u6570\u503c\u6765\u914d\u7f6e spdlog \u65e5\u5fd7\u5668：<\/p>\n

    #include <spdlog\/spdlog.h>
    \n#include <spdlog\/async.h> \/\/ \u5f02\u6b65\u65e5\u5fd7\u9700\u8981
    \n#include <spdlog\/sinks\/basic_file_sink.h>
    \n#include <spdlog\/sinks\/stdout_color_sinks.h><\/p>\n

    \/\/ \u6839\u636e log_level \u53c2\u6570\u8bbe\u7f6e\u5168\u5c40\u65e5\u5fd7\u7ea7\u522b
    \n std::string level_str = FLAGS_log_level;
    \n spdlog::level::level_enum log_level = spdlog::level::from_str(level_str); \/\/ \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u65e5\u5fd7\u7ea7\u522b\u679a\u4e3e<\/p>\n

    \/\/ \u521b\u5efa sink（\u8f93\u51fa\u76ee\u6807）\u7684 vector
    \n std::vector<spdlog::sink_ptr> sinks;<\/p>\n

    \/\/ \u603b\u662f\u6dfb\u52a0\u63a7\u5236\u53f0 sink（\u5e26\u989c\u8272）
    \n sinks.push_back(std::make_shared<spdlog::sinks::stdout_color_sink_mt>());<\/p>\n

    \/\/ \u5982\u679c\u6307\u5b9a\u4e86\u65e5\u5fd7\u6587\u4ef6，\u6dfb\u52a0\u6587\u4ef6 sink
    \n if (!FLAGS_log_file.empty()) {
    \n try {
    \n auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(FLAGS_log_file, true); \/\/ true \u8868\u793a\u622a\u65ad\u6587\u4ef6
    \n sinks.push_back(file_sink);
    \n } catch (const spdlog::spdlog_ex& ex) {
    \n spdlog::error("\u521b\u5efa\u65e5\u5fd7\u6587\u4ef6\u5931\u8d25: {}", ex.what());
    \n \/\/ \u5904\u7406\u9519\u8bef，\u53ef\u80fd\u53ea\u4fdd\u7559\u63a7\u5236\u53f0\u65e5\u5fd7
    \n }
    \n }<\/p>\n

    \/\/ \u521b\u5efa\u65e5\u5fd7\u5668
    \n std::shared_ptr<spdlog::logger> logger;
    \n if (FLAGS_log_async) {
    \n \/\/ \u521b\u5efa\u5f02\u6b65\u65e5\u5fd7\u5668 (\u9ad8\u6027\u80fd)
    \n spdlog::init_thread_pool(FLAGS_log_queue_size, 1); \/\/ \u961f\u5217\u5927\u5c0f\u6765\u81ea gflags \u53c2\u6570
    \n logger = std::make_shared<spdlog::async_logger>(
    \n "main_logger", sinks.begin(), sinks.end(), spdlog::thread_pool(),
    \n spdlog::async_overflow_policy::block \/\/ \u961f\u5217\u6ee1\u65f6\u963b\u585e
    \n );
    \n } else {
    \n \/\/ \u521b\u5efa\u540c\u6b65\u65e5\u5fd7\u5668
    \n logger = std::make_shared<spdlog::logger>("main_logger", sinks.begin(), sinks.end());
    \n }<\/p>\n

    \/\/ \u8bbe\u7f6e\u65e5\u5fd7\u683c\u5f0f (\u53ef\u9009，\u6839\u636e\u9700\u8981\u81ea\u5b9a\u4e49)
    \n logger->set_pattern("[%Y-%m-%d %H:%M:%S.%e] [%^%l%$] [thread %t] %v");<\/p>\n

    \/\/ \u8bbe\u7f6e\u65e5\u5fd7\u7ea7\u522b (\u6765\u81ea gflags \u53c2\u6570)
    \n logger->set_level(log_level);<\/p>\n

    \/\/ \u6ce8\u518c\u4e3a\u5168\u5c40\u65e5\u5fd7\u5668 (\u53ef\u9009)
    \n spdlog::register_logger(logger);
    \n spdlog::set_default_logger(logger);<\/p>\n

    \/\/ … \u540e\u7eed\u7a0b\u5e8f\u903b\u8f91，\u5f00\u59cb\u4f7f\u7528 logger \u8bb0\u5f55\u65e5\u5fd7 …<\/p>\n

    5. \u5728\u4ee3\u7801\u4e2d\u4f7f\u7528 spdlog \u8bb0\u5f55\u65e5\u5fd7<\/p>\n

    \u5728\u7a0b\u5e8f\u7684\u4efb\u4f55\u5730\u65b9，\u90fd\u53ef\u4ee5\u4f7f\u7528 spdlog \u7684\u5b8f\u6216\u5168\u5c40 logger \u5bf9\u8c61\u8bb0\u5f55\u65e5\u5fd7：<\/p>\n

    \/\/ \u4f7f\u7528\u5168\u5c40\u9ed8\u8ba4\u65e5\u5fd7\u5668 (\u5982\u679c\u6ce8\u518c\u4e86)
    \n spdlog::info("\u7a0b\u5e8f\u542f\u52a8\u6210\u529f！");
    \n spdlog::debug("\u8c03\u8bd5\u4fe1\u606f: \u53c2\u6570 log_level={}, log_async={}", FLAGS_log_level, FLAGS_log_async);<\/p>\n

    \/\/ \u6216\u8005\u4f7f\u7528\u547d\u540d\u7684\u65e5\u5fd7\u5668\u5bf9\u8c61 (\u63a8\u8350)
    \n logger->warn("\u8fd9\u662f\u4e00\u4e2a\u8b66\u544a\u4fe1\u606f！");
    \n logger->error("\u53d1\u751f\u4e86\u4e00\u4e2a\u9519\u8bef！\u9519\u8bef\u7801: {}", 404);<\/p>\n

    try {
    \n \/\/ … \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801 …
    \n } catch (const std::exception& e) {
    \n logger->critical("\u53d1\u751f\u672a\u6355\u83b7\u7684\u5f02\u5e38: {}", e.what());
    \n }<\/p>\n

    6. \u7a0b\u5e8f\u9000\u51fa\u524d\u6e05\u7406 (\u53ef\u9009)<\/p>\n

    \u5728 main \u51fd\u6570\u8fd4\u56de\u524d，\u53ef\u4ee5\u663e\u5f0f\u5173\u95ed\u65e5\u5fd7\u7cfb\u7edf\u4ee5\u786e\u4fdd\u6240\u6709\u65e5\u5fd7\u6d88\u606f\u90fd\u88ab\u5237\u65b0：<\/p>\n

    \/\/ … \u7a0b\u5e8f\u7ed3\u675f\u524d\u7684\u4ee3\u7801 …
    \n spdlog::shutdown(); \/\/ \u5173\u95ed\u6240\u6709\u65e5\u5fd7\u5668\u5e76\u91ca\u653e\u8d44\u6e90
    \n return 0;
    \n}<\/p>\n

    \u7f16\u8bd1\u547d\u4ee4\u793a\u4f8b (Linux\/g++)<\/p>\n

    g++ -std=c++17 -O2 -o myapp main.cpp -lgflags -lspdlog -lpthread<\/p>\n