在早期开发的软件中,尤其是初学者入门者写的软件,软件运行久了,难免遇到意外崩溃的时候,可是大部分的运行设备可能在现场客户那,需要记住每一次从软件启动后到软件意外关闭前的运行时间,需要记录的信息包括:编号+开始时间+结束时间+已运行时间,每次完整的运行过程只产生一条记录,每次运行时间改变以后更新当前这条记录即可。这样就可以确切的了解到软件在现场的真实运行情况是否糟糕,如果没有这个记录(当然可以选择记录存储到数据库),程序又重启恢复了,也不知道到底每次运行了多久,从几点到几点。
为了写的简单点,不干扰原有的数据库文件,我一般选择输出到文本文件。
完整代码下载: https://download.csdn.net/download/feiyangqingyun/11010447
完整代码:
#ifndef SAVERUNTIME_H #define SAVERUNTIME_H #include <QObject> #include <QDateTime> class QTimer; #ifdef quc #if (QT_VERSION < QT_VERSION_CHECK(5,7,0)) #include <QtDesigner/QDesignerExportWidget> #else #include <QtUiPlugin/QDesignerExportWidget> #endif class QDESIGNER_WIDGET_EXPORT SaveRunTime : public QObject #else class SaveRunTime : public QObject #endif { Q_OBJECT public: static SaveRunTime *Instance(); explicit SaveRunTime(QObject *parent = 0); private: static QScopedPointer<SaveRunTime> self; QString path; //日志文件路径 QString name; //日志文件名称 int lastID; int saveInterval; QDateTime startTime; QString logFile; QTimer *timerSave; private: void getDiffValue(const QDateTime &startTime, const QDateTime &endTime, int &day, int &hour, int &minute); signals: public slots: void start(); //启动服务 void stop(); //停止服务 void initLog(); //初始化日志文件 void appendLog(); //追加一条记录到日志文件 void saveLog(); //保存运行时间到日志文件 void setPath(const QString &path); void setName(const QString &name); void setSaveInterval(int saveInterval); }; #endif // SAVERUNTIME_H #include "saveruntime.h" #include "qmutex.h" #include "qapplication.h" #include "qtimer.h" #include "qfile.h" #include "qtextstream.h" #include "qstringlist.h" #include "qdebug.h" #ifdef Q_OS_WIN #define NEWLINE " " #else #define NEWLINE " " #endif QScopedPointer<SaveRunTime> SaveRunTime::self; SaveRunTime *SaveRunTime::Instance() { if (self.isNull()) { QMutex mutex; QMutexLocker locker(&mutex); if (self.isNull()) { self.reset(new SaveRunTime); } } return self.data(); } SaveRunTime::SaveRunTime(QObject *parent) : QObject(parent) { path = qApp->applicationDirPath(); QString str = qApp->applicationFilePath(); QStringList list = str.split("/"); name = list.at(list.count() - 1).split(".").at(0); saveInterval = 1 * 60 * 1000; startTime = QDateTime::currentDateTime(); timerSave = new QTimer(this); timerSave->setInterval(saveInterval); connect(timerSave, SIGNAL(timeout()), this, SLOT(saveLog())); } void SaveRunTime::start() { timerSave->start(); initLog(); appendLog(); saveLog(); } void SaveRunTime::stop() { timerSave->stop(); } void SaveRunTime::getDiffValue(const QDateTime &startTime, const QDateTime &endTime, int &day, int &hour, int &minute) { qint64 sec = startTime.secsTo(endTime); day = hour = minute = 0; int seconds = 0; while (sec > 0) { seconds++; if (seconds == 60) { minute++; seconds = 0; } if (minute == 60) { hour++; minute = 0; } if (hour == 24) { day++; hour = 0; } sec--; } } void SaveRunTime::initLog() { //判断当前年份的记事本文件是否存在,不存在则新建并且写入标题 //存在则自动读取最后一行的id号 记事本文件格式内容 //编号 开始时间 结束时间 已运行时间 //1 2016-01-01 12:33:33 2016-02-05 12:12:12 day: 0 hour: 0 minute: 0 logFile = QString("%1/%2_runtime_%3.txt").arg(path).arg(name).arg(QDate::currentDate().year()); QFile file(logFile); if (file.size() == 0) { if (file.open(QFile::WriteOnly | QFile::Text)) { QString strID = QString("%1 ").arg("编号"); QString strStartTime = QString("%1 ").arg("开始时间"); QString strEndTime = QString("%1 ").arg("结束时间"); QString strRunTime = QString("%1").arg("已运行时间"); QString line = strID + strStartTime + strEndTime + strRunTime; QTextStream stream(&file); stream << line << NEWLINE; file.close(); lastID = 0; } } else { if (file.open(QFile::ReadOnly)) { QString lastLine; while (!file.atEnd()) { lastLine = file.readLine(); } file.close(); QStringList list = lastLine.split(" "); lastID = list.at(0).toInt(); } } lastID++; } void SaveRunTime::appendLog() { logFile = QString("%1/%2_runtime_%3.txt").arg(path).arg(name).arg(QDate::currentDate().year()); QFile file(logFile); //写入当前首次运行时间 if (file.open(QFile::WriteOnly | QFile::Append | QFile::Text)) { QString strID = QString("%1 ").arg(lastID); QString strStartTime = QString("%1 ").arg(startTime.toString("yyyy-MM-dd HH:mm:ss")); QString strEndTime = QString("%1 ").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm:ss")); int day, hour, minute; getDiffValue(startTime, QDateTime::currentDateTime(), day, hour, minute); QString strRunTime = QString("%1 天 %2 时 %3 分").arg(day).arg(hour).arg(minute); QString line = strID + strStartTime + strEndTime + strRunTime; QTextStream stream(&file); stream << line << NEWLINE; file.close(); } } void SaveRunTime::saveLog() { //每次保存都是将之前的所有文本读取出来,然后替换最后一行即可 logFile = QString("%1/%2_runtime_%3.txt").arg(path).arg(name).arg(QDate::currentDate().year()); QFile file(logFile); //如果日志文件不存在,则初始化一个日志文件 if (file.size() == 0) { initLog(); appendLog(); return; } if (file.open(QFile::ReadWrite)) { //一行行读取到链表 QStringList content; while (!file.atEnd()) { content.append(file.readLine()); } //重新清空文件 file.resize(0); //如果行数小于2则返回 if (content.count() < 2) { file.close(); return; } QString lastLine = content.last(); QStringList list = lastLine.split(" "); //计算已运行时间 int day, hour, minute; getDiffValue(startTime, QDateTime::currentDateTime(), day, hour, minute); QString strRunTime = QString("%1 天 %2 时 %3 分").arg(day).arg(hour).arg(minute); //重新拼接最后一行 list[2] = QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm:ss"); list[3] = strRunTime; lastLine = list.join(" "); //重新替换最后一行并写入新的数据 content[content.count() - 1] = lastLine; QTextStream stream(&file); stream << content.join("") << NEWLINE; file.close(); } } void SaveRunTime::setPath(const QString &path) { if (this->path != path) { this->path = path; } } void SaveRunTime::setName(const QString &name) { if (this->name != name) { this->name = name; } } void SaveRunTime::setSaveInterval(int saveInterval) { if (this->saveInterval != saveInterval) { this->saveInterval = saveInterval; timerSave->setInterval(saveInterval); } }