Qt编写的软件在线升级系统（客户端）

程序入口(main.cpp)：

 #include
 #include
 #include
 #include
 #include "Update.h"
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
     QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
     QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
     QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
     Update *update=new Update();
     return a.exec();
 }

 

客户端用Qt设计师画了一个界面，有一个进度条和四个标签：

 

Update类继承自Qt设计师生成的类，所以界面可以在这个类中控制。该类的定义如下：

 

 #ifndef UPDATE_H
 #define UPDATE_H
 #include
 #include
 #include
 #include
 #include
 #include
 #include
 #include "ui_ProgressBar.h"
 class Update : public QDialog,public Ui::ProgressBarClass
 {
     Q_OBJECT
 public:
     Update(QWidget *parent = 0);
     ~Update();
 private:
     QTcpSocket *clientSocket;
     quint64 nextBlockSize;
     QString version,version_s;
     int bytesWritten;
 private slots:
     void disconnect();
     void communicate();
 };
 #endif // UPDATE_H

 

类的实现：

 

 #include "Update.h"
 Update::Update(QWidget *parent)
     : QDialog(parent)
 {
     setupUi(this);
     nextBlockSize=0;
     bytesWritten=0;
     progressBar->setMaximum(0);
     QFile vfile("version.dat");
     if (vfile.open(QIODevice::ReadOnly))
     {
         QTextStream stream(&vfile);
         version = stream.readLine();
         vfile.close();
     }
     //获取服务器地址
     QString ipAdd;//服务器地址
     QFile netfile("net.dat");
     if (netfile.open(QIODevice::ReadOnly))
     {
         QTextStream stream(&netfile);
         ipAdd = stream.readLine();
         netfile.close();
     }
     //连接到服务器
     clientSocket=new QTcpSocket(0);
     clientSocket->connectToHost(ipAdd,3327);
     QObject::connect(clientSocket,SIGNAL(readyRead()),this,SLOT(communicate()));
     QObject::connect(clientSocket,SIGNAL(disconnected()),this,SLOT(disconnect()));
 }
 Update::~Update()
 {
 }
 void Update::communicate()
 {
     QDataStream in(clientSocket);
     in.setVersion(QDataStream::Qt_4_5);
     while(1)
     {
         int bytes=(int)(clientSocket->bytesAvailable());
         //已经接收
         bytesWritten+=bytes;
         if(progressBar->maximum())
         {
             //设置进度条当前进度
             progressBar->setValue(bytes);
             comeLabel->setText(QString::number(bytes));
         }
         if (nextBlockSize == 0)
         {
             if (quint64(bytes) < sizeof(quint64))
             {
                 break;
             }
             //总的数据大小
             in >> nextBlockSize;
             //设置进度条最大值
             progressBar->setMaximum((int)nextBlockSize);
             totleLabel->setText(QString::number((int)nextBlockSize));
             this->show();
         }
         if (quint64(bytes)
         {
             break;;
         }
         //通信协议
         quint16 protocol;
         in>>protocol;
         switch(protocol)
         {
             case 0x0001:
             {
                 in>>version_s;
                 //最新版本，不用升级
                 if(version==version_s)
                 {
                     QMessageBox::information(this,tr("提示"),tr("当前版本已经是最新的了！"));
                     QProcess::startDetached("MRP.exe");
                     qApp->quit();
                 }
                 else
                 {
                     QByteArray block;
                     QDataStream out(&block, QIODevice::WriteOnly);
                     out.setVersion(QDataStream::Qt_4_5);
                     out<
                     out.device()->seek(0);
                     out<sizeof(quint64));
                     clientSocket->write(block);
                 }
                 break;
             }
             case 0x0002:
             {
                 QByteArray block1;
                 QByteArray block2;
                 in>>block1>>block2;
                 //打开要更新的文件并写入数据
                 QFile file1("MRP.exe");
                 if (file1.open(QIODevice::WriteOnly)&&block1.length()!=0)
                 {
                     file1.write(block1);
                     file1.close();
                 }
                 QFile file2("common.dll");
                 if (file2.open(QIODevice::WriteOnly)&&block2.length()!=0)
                 {
                     file2.write(block2);
                     file2.close();
                 }
                 //修改版本文件
                 QFile wvfile("version.dat");
                 if (wvfile.open(QIODevice::WriteOnly))
                 {
                     wvfile.write(version_s.toUtf8());
                     wvfile.write("/r/n");
                     //写入更新日期
                     wvfile.write(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss").toUtf8());
                     wvfile.close();
                 }
                 QMessageBox::information(this,tr("升级成功"),"您的软件版本已经从"+version+"升级到"+version_s+"，将重启启动软件！");
                 //启动主程序
                 QProcess::startDetached("MRP.exe");
                 qApp->quit();
                 break;
             }
         }
         nextBlockSize=0;
     }
 }
 void Update::disconnect()
 {
     clientSocket->deleteLater();
     QMessageBox::information(this,tr("错误"),tr("网络连接中断！"));
     qApp->quit();
 }