在C++实际项目中,有时候需要当前时间和过去时间做对比,因此找到了一种方法,经检测可用。

话不多说,直接上代码——

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//getLocalTime.cpp

#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <iostream>
#include <sstream>
#include <string>
using namespace std;

std::string FaGetSysTime() {
struct timeval tv;
gettimeofday(&tv, NULL);
struct tm* pTime;
pTime = localtime(&tv.tv_sec);

std::string sTemp;
std::ostringstream oss;

//year
oss << pTime->tm_year + 1900 << "-";

//month
if (pTime->tm_mon < 9) {
oss << "0" << pTime->tm_mon + 1 << "-";
} else {
oss << pTime->tm_mon + 1 << "-";
}

//day
if (pTime->tm_mday <= 10) {
oss << "0" << pTime->tm_mday - 1 << " ";
} else {
oss << pTime->tm_mday - 1 << " ";
}

//hour
if (pTime->tm_hour < 10) {
oss << "0" << pTime->tm_hour << ":";
} else {
oss << pTime->tm_hour << ":";
}

//minute
if (pTime->tm_min < 10) {
oss << "0" << pTime->tm_min << ":";
} else {
oss << pTime->tm_min << ":";
}

//second
if (pTime->tm_sec < 10) {
oss << "0" << pTime->tm_sec << ".";
} else {
oss << pTime->tm_sec << ".";
}

//ms
oss << tv.tv_usec / 1000;

//us
oss << tv.tv_usec % 1000;

sTemp += oss.str();

return sTemp;
}

int main() {
cout << "当前时间:" << FaGetSysTime() << endl;

return 0;
}

编译结果输出:

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[email protected]:~/workspace/collide$ g++ getLocalTime.cpp 
[email protected]:~/workspace/collide$ ./a.out
当前时间:2019-09-22 10:06:02.663171
[email protected]:~/workspace/collide$

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