qInstallMessageHandler(BOM_QTLOG::bomMessageOutput);
qInstallMessageHandler(0); //取消
#ifndef BOMLOG
#define BOMLOG
#include <stdio.h>
#include <stdlib.h>
#include <QDebug>
#include <QFile>
#include <QFileInfo>
#include <QDir>
#include <QMutex>
#define LOG_FILE_KEEP_NUM 7
namespace BOM_QTLOG {
void bomMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg);
}
void BOM_QTLOG::bomMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
static QMutex mutex;
mutex.lock();
//#1 create directory that name is log
QDir dir("log");
if (!dir.exists())
{
QDir dir;
dir.mkdir("log");
}
//#2 create log file by current date ==> eg:log20170418.txt
QString currentDate = QDateTime::currentDateTime().toString("yyyyMMdd");
QString logName = "log" + currentDate + ".txt";
QString logFileName = "log/" + logName;
//#3 Keep a journal for the last one week.
if (!QFile::exists(logFileName))
{
QFileInfoList fileList = dir.entryInfoList(QStringList() << "*.txt", QDir::NoFilter, QDir::Time);
if (fileList.size() >= LOG_FILE_KEEP_NUM)
{
int i = 1;
foreach(QFileInfo fileInfo , fileList)
{
if (i >= LOG_FILE_KEEP_NUM)
{
QString fileName = fileInfo.absoluteFilePath();
QFile::remove(fileName);
}
i++;
}
}
}
QFile file(logFileName);
if (!file.open(QIODevice::WriteOnly | QIODevice::Append))
{
file.close();
return ;
}
//#4 joint string
QString currentDateTime = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
QString logMsg;
switch (type)
{
case QtDebugMsg:
logMsg = QString("[Debug]: ");
break;
case QtInfoMsg:
logMsg = QString("[Info]: ");
break;
case QtWarningMsg:
logMsg = QString("[Warning]: ");
break;
case QtCriticalMsg:
logMsg = QString("[Critical]: ");
break;
case QtFatalMsg:
logMsg = QString("[Fatal]: ");
abort();
break;
default:
break;
}
// 设置输出信息格式
QString context_info = QString("File:[%1] Function[%2] Line:[%3] \n").arg(QString(context.file)).arg(context.function).arg(context.line);
logMsg = QString("%1 %2 %3%4 \n").arg(currentDateTime).arg(logMsg).arg(context_info).arg(msg);
//#5 log message out to file
QTextStream ts(&file);
ts << logMsg<<"\r\n";
file.flush();
file.close();
mutex.unlock();
}
#endif // BOMLOG