标签：c++ 写log
class MYLog
{
public:
~MYLog(void);
static MYLog * Log();
bool OpenLogFile(const string &sFilePath);
void Message(const string &sFileName,const string &sFunc,const long &lLine,const string &sMessage);
private:
static MYLog *m_pInstance;
MYLog(void);
void GetNowTime();
ofstream m_fout;
string m_sFilePath;
string m_sNowTiem;
string m_sFileSavePath;
string m_LastDate;
};
#include "stdafx.h"
#include "MYLog.h"
//单例静态指针初始化
MYLog * MYLog:: m_pInstance = new MYLog();
/***********************************
此函数不会被调用
***********************************/
MYLog::MYLog(void)
{
}
/***********************************
析构单例指针
***********************************/
MYLog::~MYLog(void)
{
if(NULL != m_pInstance)
{
delete m_pInstance;
}
m_fout.close();
}
/***********************************
获得单例实例
***********************************/
MYLog * MYLog:: Log()
{
return m_pInstance;
}
/***********************************
打开Log文件
***********************************/
bool MYLog::OpenLogFile(const string &sFilePath)
{
if(true == m_fout.is_open())
{
m_fout.close();
}
m_sFileSavePath = sFilePath;
if(m_sFileSavePath.find_last_of("\\") != m_sFileSavePath.length() -1 && m_sFileSavePath.find_last_of("/") != m_sFileSavePath.length() -1)
{
m_sFileSavePath += "/";
}
time_t t = time(0);
char tmp[64];
strftime( tmp, sizeof(tmp), "%Y-%m-%d",localtime(&t) );
string sTemp = tmp;
m_LastDate = tmp;
m_sFilePath = m_sFileSavePath + sTemp + ".txt" ;
m_fout.open(m_sFilePath.c_str(),ios::app);
if(NULL == m_fout)
{
return false;
}
return true;
}
/**********************************
获取当前时间
**********************************/
void MYLog::GetNowTime()
{
time_t t = time(0);
char tmp[64];
strftime( tmp, sizeof(tmp), "%Y/%m/%d %X ",localtime(&t) );
m_sNowTiem = tmp;
strftime( tmp, sizeof(tmp), "%Y-%m-%d",localtime(&t) );
string sData = tmp;
if(sData != m_LastDate)
{
OpenLogFile(m_sFileSavePath);
}
}
/***********************************
将信息写入Log文件
***********************************/
void MYLog::Message(const string &sFile,const string &sFunc,const long &lLine,const string &sMessage)
{
GetNowTime();
string sFileName = sFile;
sFileName = sFileName.substr(sFileName.find_last_of("\\")+1,sFileName.length()-sFileName.find_last_of("\\")-1);
m_fout<<m_sNowTiem.c_str()<<" FILE: "<<sFileName.c_str()<<" FUNC: "<<sFunc.c_str()<<" LINE: "<<lLine<<" MES: "<<sMessage.c_str()<<endl;
m_fout.flush();
}
//DLL 导出函数
extern "C" _declspec(dllexport) bool LogPath(const string &sFilePath)
{
bool isSucess = MYLog::Log()->OpenLogFile(sFilePath);
return isSucess;
}
extern "C" _declspec(dllexport) void WRITELOG(const string &sFile,const string &sFunc,const long &lLine,const string &sMessage)
{
MYLog::Log()->Message(sFile,sFunc,lLine,sMessage);
}
调用
#include "stdafx.h"
typedef void (*LOGFUN)(const string &sFile,const string &sFunc,const long &lLine,const string &sMessage);
LOGFUN MYLOG;
//typedef void (*LOGFUN)(const string &sFunc,const string &sMessage);
//extern LOGFUN MYLOG;
void FuncB()
{
MYLOG(__FILE__,__FUNCTION__,__LINE__,"It is in FuncB");
}
int _tmain(int argc, _TCHAR* argv[])
{
char c;
HINSTANCE hInput;
hInput = LoadLibrary(_T("LogDll.dll"));
if(NULL == hInput)
{
cout<<"load failed"<<endl;
c = getchar();
return -1;
}
typedef bool (*FUNC)(const string &sFilePath);
FUNC fun = (FUNC)GetProcAddress(hInput,"LogPath");
if(NULL == fun)
{
cout<<"load function failed"<<endl;
c = getchar();
return -1;
}
bool iResult = fun("c://");
cout<<"result is"<<iResult<<endl;
MYLOG = (LOGFUN)GetProcAddress(hInput,"WRITELOG");
if(NULL == MYLOG)
{
cout<<"load function failed"<<endl;
c = getchar();
return -1;
}
while(true)
{
cout<<"wrtite..."<<endl;
MYLOG(__FILE__,__FUNCTION__,__LINE__,"This is a test");
FuncB();
Sleep(5000);
}
c = getchar();
return 0;
return 0;
}本文出自 “风清扬song” 博客，请务必保留此出处http://2309998.blog.51cto.com/2299998/1423797
标签：c++ 写log
原文地址：http://2309998.blog.51cto.com/2299998/1423797
