QT 保存日志数据，根据条件自动创建日志文件

#include "savelogaffair.h" #include <QCoreApplication> #include <QList> #include <QDateTime> #include <QFile> #include <string> using namespace std; // 获取当前时间 string LogGetCurrentTime(bool bPathFlag = false) { QDateTime curTime = QDateTime::currentDateTime(); QString strCurTime; if(!bPathFlag) strCurTime = curTime.toString("yyyy.MM.dd hh:mm:ss"); else strCurTime = curTime.toString("yyyy_MM_dd"); return strCurTime.toStdString(); } // 日志记录数据 typedef QList<string> LogData_List; // 日志存储列表 class LogDataList { public: LogDataList(){ClearData();} ~LogDataList(){ClearData();} public: // 向list中存储数据 void PushData(string data) { QMutexLocker lock(&m_Mutex); m_logDataList.append(data); } // 从list中取出指定序号的数据项，并删除之，如获取失败，则返回false bool PopData(string& data, int iIndex = 0) { QMutexLocker lock(&m_Mutex); if(m_logDataList.isEmpty()) return false; data = m_logDataList.at(iIndex); m_logDataList.removeAt(iIndex); return true; } // 从list中取出指定序号的数据项，如获取失败，则返回false bool GetData(string& data, int iIndex = 0) { QMutexLocker lock(&m_Mutex); if(m_logDataList.isEmpty()) return false; data = m_logDataList.at(iIndex); return true; } // 判断list是否为空 bool IsEmpty() { QMutexLocker lock(&m_Mutex); return m_logDataList.isEmpty(); } // 清空队列 void ClearData() { QMutexLocker lock(&m_Mutex); m_logDataList.clear(); } private: QMutex m_Mutex; LogData_List m_logDataList; }; static bool g_bInitFlag = false; static string g_strLogFilePath = ""; static LogDataList g_logDataList; SaveLogThread::SaveLogThread() {} SaveLogThread::~SaveLogThread() { SetExitThreadFlag(true); } // 设置线程退出标记 void SaveLogThread::SetExitThreadFlag(bool bExitThreadFlag) { QMutexLocker lock(&m_Mutex); m_bExitThreadFlag = bExitThreadFlag; } // 获取线程退出标记 bool SaveLogThread::GetExitThreadFlag() { QMutexLocker lock(&m_Mutex); return m_bExitThreadFlag; } void SaveLogThread::run() { string strLogData; QFile qFile; qFile.setFileName(QString::fromStdString(g_strLogFilePath)); bool bOk = qFile.open(QIODevice::WriteOnly); if(!bOk) return; while(!GetExitThreadFlag()) { if(!g_logDataList.PopData(strLogData)) { QThread::msleep(10); continue; } else { // 记录日志到文件 qFile.write(strLogData.c_str()); } QThread::msleep(30); } qFile.close(); } static SaveLogThread* g_pThread = nullptr; // 进入日志模块 void EnterLogModule() { if(g_bInitFlag) return; g_bInitFlag = true; g_strLogFilePath = QCoreApplication::applicationDirPath().toStdString() + string("/") + LogGetCurrentTime(true) + string(".log"); g_logDataList.ClearData(); g_pThread = new SaveLogThread(); g_pThread->start(); } // 退出日志模块 void ExitLogModule() { if(!g_bInitFlag) return; g_pThread->SetExitThreadFlag(true); QThread::msleep(200); g_pThread->wait(); delete g_pThread; g_pThread = nullptr; g_logDataList.ClearData(); } // 保存日志信息 void SaveLogInfo(LogLevel lLevel, const char* pStrInfo) { if(!g_bInitFlag) return; string strTime = LogGetCurrentTime(); string strLogNode; switch(lLevel) { case LogLevel::LevelError: strLogNode = strTime +" Error: " + pStrInfo + "\r\n"; break; case LogLevel::LevelAlarm: strLogNode = strTime +" Alarm: " + pStrInfo + "\r\n"; break; case LogLevel::LevelNormal: strLogNode = strTime +" Normal: " + pStrInfo + "\r\n"; break; default: return; } g_logDataList.PushData(strLogNode); }