一个简单的Qt日志类使用方便

多线程下可能会出问题，没有测试过

#include <QFile>
#include <QMutex>
#include <QTextStream>

#define LOG_INFO        0
#define LOG_WARNING     1
#define LOG_ERROR       2

#define DETAIL_INFO  QString::fromLocal8Bit("在文件%1，第%2行，函数%3记录").arg(__FILE__).arg(__LINE__).arg(__FUNCTION__)


#define LOGERROR(_log) SimpleLog::getInstance()->writeLog(_log, DETAIL_INFO, LOG_ERROR)
#define LOGINFO(_log) SimpleLog::getInstance()->writeLog(_log, DETAIL_INFO, LOG_INFO)
#define LOGWRANING(_log) SimpleLog::getInstance()->writeLog(_log, DETAIL_INFO, LOG_WARNING)

class SimpleLog
{
private:
	SimpleLog();
	static SimpleLog* m_instance;
public:
	~SimpleLog();
	static SimpleLog* getInstance();
	void writeLog(QString _log, QString _details = "", int _flag = LOG_INFO);
	void createDumpFile();
private:
	void openNewLog();
	void endLog();
private:
	QFile m_log;
	QMutex m_mutex;
	QTextStream m_stream;
	int m_index;
};

.cpp

#include "simplelog.h"
#include <QDir>
#include <QSettings>
#include <QApplication>
#include <QDebug>

#include <windows.h>
#include  <dbghelp.h> 
#pragma comment(lib,  "dbghelp.lib")
#include <QTime>

//异常处理代码
//EXCEPTION_EXECUTE_HANDLER equ 1 表示我已经处理了异常,可以优雅地结束了 
//EXCEPTION_CONTINUE_SEARCH equ 0 表示我不处理,其他人来吧,于是windows调用默认的处理程序显示一个错误框,并结束 
//EXCEPTION_CONTINUE_EXECUTION equ -1 表示错误已经被修复,请从异常发生处继续执行 
LONG WINAPI DumpRegister(struct _EXCEPTION_POINTERS* ExceptionInfo)
{
	QDir _applicationDir(QCoreApplication::applicationDirPath());
	_applicationDir.cdUp();
	if (!_applicationDir.exists(_applicationDir.path() + "/log"))
	{
		_applicationDir.mkpath(_applicationDir.path() + "/log");
	}
	_applicationDir.cd("log");
	QString date = QDate::currentDate().toString("yyyy-MM-dd");
	QString _path = _applicationDir.path() + "/" + date;
	if (!_applicationDir.exists(_path))
	{
		_applicationDir.mkpath(_path);
	}
	_applicationDir.cd(date);
	QString   strDumpFile = QTime::currentTime().toString("hh-mm-ss");
	strDumpFile += ".dmp ";
	QString fileName = _applicationDir.path() + "/" + strDumpFile;
	HANDLE   hFile = CreateFile(fileName.toStdWString().c_str(), GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

	if (hFile != INVALID_HANDLE_VALUE)
	{
		MINIDUMP_EXCEPTION_INFORMATION   ExInfo;
		ExInfo.ThreadId = ::GetCurrentThreadId();
		ExInfo.ExceptionPointers = ExceptionInfo;
		ExInfo.ClientPointers = NULL;
		//   write   the   dump
		BOOL   bOK = MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), hFile, MiniDumpNormal, &ExInfo, NULL, NULL);
		CloseHandle(hFile);
	}
	//theApp.PostThreadMessage(WM_QUIT,0,0);
	return EXCEPTION_EXECUTE_HANDLER;
}


SimpleLog* SimpleLog::m_instance = new SimpleLog;
SimpleLog*  SimpleLog::getInstance()
{
	return m_instance;
}

SimpleLog::SimpleLog()
{
	QDir _applicationDir(QCoreApplication::applicationDirPath());
	_applicationDir.cdUp();

	if (!_applicationDir.exists(_applicationDir.path() + "/log"))
	{
		_applicationDir.mkpath(_applicationDir.path() + "/log");
	}
	_applicationDir.cd("log");
	QString date = QDate::currentDate().toString("yyyy-MM-dd");
	QString time = QTime::currentTime().toString("hh-mm-ss");
	time += ".html";
	QString _path = _applicationDir.path() + "/" + date;
	if (!_applicationDir.exists(_path))
	{
		_applicationDir.mkpath(_path);
	}
	_applicationDir.cd(date);

	m_index = 0;

	m_log.setFileName(_applicationDir.path() + "/" + time);
	if (m_log.exists())m_log.remove();
	if (m_log.open(QIODevice::ReadWrite | QIODevice::Text | QFile::Append))
	{
		m_stream.setDevice(&m_log);
		QString _logTitle = QString::fromLocal8Bit("<html>\n<head>\n<title>日志记录</title>\n</head>\n<body>\n");
		m_stream << _logTitle;
	}
}

SimpleLog::~SimpleLog()
{
	endLog();
}

void SimpleLog::writeLog(QString _log, QString _details, int _flag)
{
	QString time = QTime::currentTime().toString("hh:mm:ss");
	m_mutex.lock();
	if (_flag == LOG_INFO)
	{
		m_stream << QString::fromLocal8Bit("<br><font color=\"#000000\" family= \"微软雅黑\">") << m_index << " " << time << " " <<  _details << QString::fromLocal8Bit("信息 : ") << _log << "</font></br>";
	}
	else  if (_flag == LOG_WARNING)
	{
		m_stream << QString::fromLocal8Bit("<br><font color=\"#0000FF\" family= \"微软雅黑\">") << m_index << " " << time << " " << _details << QString::fromLocal8Bit("警告 : ") << _log << "</font></br>";
	}
	else if (_flag == LOG_ERROR)
	{
		m_stream << QString::fromLocal8Bit("<br><font color=\"#FF0000\" family= \"微软雅黑\">") << m_index << " " << time << " " << _details << QString::fromLocal8Bit("错误 : ") << _log << "</font></br>";
	}
	m_stream.flush();
	m_log.flush();
	m_index += 1;
	m_mutex.unlock();
}


void SimpleLog::createDumpFile()
{
	::SetUnhandledExceptionFilter(DumpRegister);
}

void SimpleLog::endLog()
{
	if (m_log.isOpen())
	{
		m_stream << "</body>";
		m_stream.flush();
		m_log.flush();
		m_log.close();
	}
}

使用方法

#include "simplelog"
LOGINFO(QString::fromLocal8Bit("我的订阅列表:%1").arg(_actorIDList.join(","))); //普通信息
LOGWARING(QString::fromLocal8Bit("我的订阅列表:%1").arg(_actorIDList.join(",")));//警告
LOGERROR(QString::fromLocal8Bit("我的订阅列表:%1").arg(_actorIDList.join(",")));//错误
//SimpleLog::getInstance()->createDumpFile(); //创建崩溃转储文件，与日志在同一目录下

一个简单的Qt日志类 使用方便

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