modify:修改mylog

loghandler.cpp

@@ -6,63 +6,72 @@
 #include <QDir>
 #include <QFile>
 #include <QFileInfo>
-#include <QTimer>
 #include <QTextStream>
-#include <QTextCodec>
-#include "Singleton.h"
 #include <QCoreApplication>
 
 QMutex g_mutex;
-//QTextStream *g_in = nullptr;
 QFile g_file;
+QTextStream g_stream;
+qint64 g_lastFlushMs = 0;
+constexpr qint64 kLogFlushIntervalMs = 1000;
 
 // 消息处理函数
 void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
-    g_mutex.lock();
-    QString level;
+    QMutexLocker locker(&g_mutex);
+    QString level, colorLevel;
 
     switch (type)
     {
     case QtDebugMsg:
         level = "DEBUG";
+        colorLevel = "\033[36m" + level + "\033[0m"; // 青色
         break;
     case QtInfoMsg:
         level = "INFO ";
+        colorLevel = "\033[32m" + level + "\033[0m"; // 绿色
         break;
     case QtWarningMsg:
         level = "WARN ";
+        colorLevel = "\033[33m" + level + "\033[0m"; // 黄色
         break;
     case QtCriticalMsg:
         level = "ERROR";
+        colorLevel = "\033[31m" + level + "\033[0m"; // 红色
         break;
     case QtFatalMsg:
         level = "FATAL";
+        colorLevel = "\033[31m" + level + "\033[0m"; // 红色
         break;
     default:
         break;
     }
 
-    // 输出到标准输出: Windows 下 std::cout 使用 GB2312，而 msg 使用 UTF-8，但是程序的 Local 也还是使用 UTF-8
-#if defined(Q_OS_WIN)
-    QByteArray localMsg = QTextCodec::codecForName("GB2312")->fromUnicode(msg); //msg.toLocal8Bit();
-#else
-    QByteArray localMsg = msg.toLocal8Bit();
-#endif
-
     // 输出到日志文件, 格式: 时间 - [Level] (文件名:行数, 函数): 消息
-    QString fileName = context.file;
+    QString fileName = context.file ? QString::fromUtf8(context.file) : QStringLiteral("unknown");
     int index = fileName.lastIndexOf(QDir::separator());
-    fileName = fileName.mid(index + 1);
-    QString msgOut = QString("%1 - [%2] (%3:%4, %5):    %6")
-                     .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss.zzz")).arg(level)
-                     .arg(fileName).arg(context.line).arg(context.function).arg(msg);
+    if (index >= 0)
+    {
+        fileName = fileName.mid(index + 1);
+    }
+
+    const QString funcName = context.function ? QString::fromUtf8(context.function) : QStringLiteral("unknown");
+    QString msgOut = QString("%1-[%2](%3:%4,%5): %6")
+                     .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss.zzz"),colorLevel, fileName, QString(context.line), funcName, msg);
+
     std::cout << msgOut.toLocal8Bit().constData() << std::endl;
-    QTextStream in(&g_file);
-    in.setCodec("UTF-8");
-    in << msgOut << "\n";
-//    g_file.flush();
-    g_mutex.unlock();
+
+    if (g_file.isOpen())
+    {
+        g_stream << msgOut << "\n";
+        const qint64 now = QDateTime::currentMSecsSinceEpoch();
+        if (type >= QtCriticalMsg || now - g_lastFlushMs >= kLogFlushIntervalMs)
+        {
+            g_stream.flush();
+            g_file.flush();
+            g_lastFlushMs = now;
+        }
+    }
 }
 
 // 给Qt安装消息处理函数
@@ -94,19 +103,23 @@ void LogHandler::installMessageHandler()
     {
         return;
     }
-//    g_in = new QTextStream(&g_file);
+
+    g_stream.setDevice(&g_file);
+    g_stream.setCodec("UTF-8");
+    g_lastFlushMs = QDateTime::currentMSecsSinceEpoch();
     qInstallMessageHandler(messageHandler); // 给 Qt 安装自定义消息处理函数
 }
 
 // 取消安装消息处理函数并释放资源
 void LogHandler::uninstallMessageHandler()
 {
-    g_mutex.lock();
+    QMutexLocker locker(&g_mutex);
     if(g_file.isOpen())
     {
+        g_stream.flush();
         g_file.flush();
         g_file.close();
     }
-    g_mutex.unlock();
+    g_stream.setDevice(nullptr);
     qInstallMessageHandler(nullptr);
 }