C++使用EasyLog写日志

EasyLog相关的头文件和.cpp文件的下载地址：https://download.youkuaiyun.com/download/pcb931126/11157258；

1.配置好相关路径，在.h文件中添加头文件

//日志类头文件
#include "../../Shared/Log/EasyLog.h"
#include "../../Shared/Log/SyncFileLog.h"
#include "../../Shared/Common/Utils.h"

//并在相关的类中添加函数声明
int	InitLogFileSetting();

并将相应的点.h文件和.cpp文件添加在工程项目中，如下图所示

2.在.cpp文件中添加下面函数

//.cpp文件的初始化函数中添加
char	m_cLogFolderPath[512];	
strcpy(m_cLogFolderPath, "Log\\");      			                                          
InitLogFileSetting();                                 //初始化

//定义全局函数
void FileLog(char * _pcData, int _iLen);

void FileLog(char * _pcData, int _iLen)
{
	g_log.Write(_pcData, _iLen);
}

int C3D_BCSSizeDetectDlg::InitLogFileSetting()
{
	g_log.SetCurExeFilePath(Utils::CurFilePath());
	int nRet = g_log.SetLogFolderPath(m_cLogFolderPath);
	if (nRet < 0)
	{
		ShowMessage(_T("设置日志文件夹路径 (%s) 失败, return %d\n"), m_cLogFolderPath, nRet);
		return -2;
	}

	g_log.SetMaxFileSize(m_iMaxLogFileSize);
	g_log.Init(30);

	CEasyLog::SetFileLogDelegate(FileLog);

	return 0;
}

调用函数，写入日志文件

/*--------------------------------------------------------------
*功能：在ListControl控件中显示处理信息
*--------------------------------------------------------------
*输入：const Cstring类型的字符串
*输出：在控件上显示字符串函数，并将显示的数据写入日志
*/
void C3D_BCSSizeDetectDlg::ShowMessage(const TCHAR* str, ...)
{	
	TCHAR tcBuf[MAX_LOCAL_BUF_SIZE] = { 0 };
	char cBuf[MAX_LOCAL_BUF_SIZE] = { 0 };
	va_list args;
	va_start(args, str);
	_vsntprintf_s(tcBuf, MAX_LOCAL_BUF_SIZE - 1, _TRUNCATE, str, args);
	va_end(args);
	CString strInfo=_T("");
	strInfo.Format(_T("%s"), tcBuf);	
	SYSTEMTIME st;
	GetLocalTime(&st);
	CString strMessage;
	strMessage.Format(_T("%04d-%02d-%02d %02d:%02d:%02d %03d| "), st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
	
	//将相关信息写入到MFC控件中
	strMessage += strInfo;
	if (m_list.GetSafeHwnd()!= NULL)
	{
		int iSelIndex = m_list.AddString(strMessage);
		if (iSelIndex != LB_ERR && iSelIndex != LB_ERRSPACE)
		{
			m_list.SetCurSel(iSelIndex);
		}
	}
	//将运行状态写入日志
	strMessage = strMessage + _T("\n");
	//得到字符串的长度
	int iLength = WideCharToMultiByte(CP_ACP, 0, strMessage, -1, NULL, 0, NULL, NULL);
	WideCharToMultiByte(CP_ACP, 0, strMessage, -1, cBuf, iLength, NULL, NULL);//TCHAR转char
	CEasyLog::__Log(cBuf, iLength);               //将相关信息写入日志文件
	return;
}

这样就在相关的目下自动创建以日期命名的文件夹

包含日志文件