将时间戳转换成年月日时分秒的字符串(ubuntu20.04，C++)

将时间戳转换成年月日时分秒的字符串(ubuntu20.04，C++)

• 源文件 test.cpp

#include <iostream>
#include <sys/time.h>
#include <unistd.h>
#include <iomanip>
using namespace std;// 获取当前时间戳(精确到毫秒)
int64_t getSysTimeMs()
{struct timeval tv;gettimeofday(&tv, nullptr);return (int64_t)(tv.tv_sec * 1000 + tv.tv_usec / 1000);
}int main()
{time_t time = getSysTimeMs()/1000;tm *ptm = std::localtime(&time);std::ostringstream oss;oss << put_time(ptm, "%Y-%m-%d_%H:%M:%S");string dateStr = oss.str();cout<< "current  time ：" << dateStr << endl;
}

• CMakeLists.txt

cmake_minimum_required(VERSION 3.0)
project(test1)add_definitions(-std=c++17)set(CMAKE_CXX_STANDARD 17)
# set(CMAKE_BUILD_TYPE Release)
set(CMAKE_BUILD_TYPE Debug)include_directories("include/")add_executable(test1src/test.cpp)