Qt编写的软件在线升级系统（客户端）

这个是客户端的实现，查看服务器端实现请看这里

 

程序入口(main.cpp)：

#include <QtGui>#include <QApplication>#include <QProcess>#include <QTextCodec>#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 <QtGui/QDialog>#include <QtGui/QMessageBox>#include <QFile>#include <QTcpSocket>#include <QDataStream>#include <QProcess>#include <QDatetime>#include "ui_ProgressBar.h"class Update : public QDialog,public Ui::ProgressBarClass{ Q_OBJECTpublic: 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)<nextBlockSize){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<<quint64(0)<<quint16(0x0001);out.device()->seek(0);out<<quint64(block.size()-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();}