c++日志工具spdLog简单使用示例代码
spdlog直接引用头文件就可以使用，这一点还是比较方便的，也是刚入门使用，下面是在源码的示例代码基础上修改测试的代码：
#include <cstdio> #include <iostream> #include "spdlog/spdlog.h" #include "spdlog/sinks/stdout_color_sinks.h" // or "../stdout_sinks.h" if no color needed #include "spdlog/sinks/basic_file_sink.h" #include "spdlog/sinks/rotating_file_sink.h" void err_handler_example() { spdlog::set_error_handler([](const std::string& msg){printf("*****Custom log error handler, %s*****%\n", msg.c_str());}); } int main(int , char *[]) { try { auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>(); console_sink->set_level(spdlog::level::debug); console_sink->set_pattern("%^[%Y-%m-%d %H:%M:%S:%e] [%n] [%t] [%l] %v%$"); //auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", false); auto file_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("logs/multisink.txt", 1048576, 3); file_sink->set_pattern("[%Y-%m-%d %H:%M:%S:%e] [%n] [%t] [%l] %v"); file_sink->set_level(spdlog::level::debug); std::vector<spdlog::sink_ptr> sinks; sinks.push_back(console_sink); sinks.push_back(file_sink); //spdlog::logger *logger = new spdlog::logger("multi_sink", {console_sink, file_sink}); auto logger = std::make_shared<spdlog::logger>("multi_sink", begin( sinks ), end( sinks )); //logger->set_level(spdlog::level::debug); #if 0 //也可以使用这种方式 spdlog::sinks_init_list sink_list = { console_sink->sinks().front(), file_sink->sinks().front() }; //创建一个新的日志对象，以上面两个日志对象作为初始化参数，即实现了同时输出 console 和 file auto log_ptr = spdlog::create("loggername", sink_list); spdlog::register_logger( combined_logger ); #endif err_handler_example(); logger->warn("this should appear in both console and file"); logger->info("this message should appear in file , not in console"); //注册到spdlog里 spdlog::register_logger(logger); auto test_logger = spdlog::get("multi_sink"); test_logger->info("getlogger::helloworld"); std::string msg = "hello world 2019."; logger->warn("spdlog: {}", msg); auto rotating_logger = spdlog::rotating_logger_mt("log_rotating", "logs/rotating.txt", 256, 2); for (int i = 0; i < 10; ++i) rotating_logger->info("{} * {} equals {:>10}", i, i, i*i); } catch (const spdlog::spdlog_ex &ex) { std::cout<<"Log initialization faild"<<ex.what()<<std::endl; } }
