锐客网

  1. 首页 > it技术 > >

通过QTcpServer从服务端获取时间

效果图
通过QTcpServer从服务端获取时间
文章图片

通过QTcpServer从服务端获取时间
文章图片

服务端
注意: 在.pro中加入QT += network
dialog.h

#ifndef DIALOG_H #define DIALOG_H#include #include #include class TimeServer; class Dialog : public QDialog { Q_OBJECTpublic: Dialog(QWidget *parent = 0); ~Dialog(); public slots: void slotShow(); private: QLabel *Label1; QLabel *Label2; QPushButton *quitBtn; //退出按钮 TimeServer *timeServer; int count; //客户端查询次数 }; #endif // DIALOG_H

【通过QTcpServer从服务端获取时间】dialog.cpp
#include "dialog.h" #include #include #include #include "timeserver.h"Dialog::Dialog(QWidget *parent) : QDialog(parent) { setWindowTitle(tr("多线程时间服务器")); Label1 =new QLabel(tr("服务器端口：")); Label2 = new QLabel; quitBtn = new QPushButton(tr("退出")); QHBoxLayout *BtnLayout = new QHBoxLayout; BtnLayout->addStretch(1); BtnLayout->addWidget(quitBtn); BtnLayout->addStretch(1); QVBoxLayout *mainLayout = new QVBoxLayout(this); mainLayout->addWidget(Label1); mainLayout->addWidget(Label2); mainLayout->addLayout(BtnLayout); connect(quitBtn,SIGNAL(clicked()),this,SLOT(close())); count=0; timeServer = new TimeServer(this); if(!timeServer->listen()) { QMessageBox::critical(this,tr("多线程时间服务器"), tr("无法启动服务器：%1.").arg(timeServer->errorString())); close(); return; } Label1->setText(tr("服务器端口：%1").arg(timeServer->serverPort())); }Dialog::~Dialog() {}void Dialog::slotShow() { Label2->setText(tr("第%1次请求完毕。").arg(++count)); }

timeserver.h
#ifndef TIMESERVER_H #define TIMESERVER_H#include class Dialog; //服务器端的声明 class TimeServer : public QTcpServer { Q_OBJECT public: TimeServer(QObject *parent=0); protected: void incomingConnection(int socketDescriptor); //将要连接 private: Dialog *dlg; }; #endif // TIMESERVER_H

timesetver.cpp
#include "timeserver.h" #include "timethread.h" #include "dialog.h"TimeServer::TimeServer(QObject *parent) :QTcpServer(parent) { dlg =(Dialog *)parent; }void TimeServer::incomingConnection(int socketDescriptor) { TimeThread *thread = new TimeThread(socketDescriptor,0); //开启线程发送时间connect(thread,SIGNAL(finished()),dlg,SLOT(slotShow())); connect(thread,SIGNAL(finished()),thread,SLOT(deleteLater()),Qt::DirectConnection); thread->start(); //执行run() }

timethread.h
#ifndef TIMETHREAD_H #define TIMETHREAD_H#include #include #include class TimeThread : public QThread { Q_OBJECT public: TimeThread(int socketDescriptor,QObject *parent=0); void run(); //构造后自动执行 signals: void error(QTcpSocket::SocketError socketError); //产生错误信号 private: int socketDescriptor; }; #endif // TIMETHREAD_H

timethread.cpp
#include "timethread.h" #include #include #include TimeThread::TimeThread(int socketDescriptor,QObject *parent) :QThread(parent),socketDescriptor(socketDescriptor) { }void TimeThread::run() { QTcpSocket tcpSocket; if(!tcpSocket.setSocketDescriptor(socketDescriptor)) { emit error(tcpSocket.error()); return; } QByteArray block; QDataStream out(&block,QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_3); uint time2u = QDateTime::currentDateTime().toTime_t(); out<

客户端
注意: 在.pro中加入QT += network
timeclient.h
#ifndef TIMECLIENT_H #define TIMECLIENT_H#include #include #include #include #include #include #include class TimeClient : public QDialog { Q_OBJECTpublic: TimeClient(QWidget *parent = 0); ~TimeClient(); public slots: void enableGetBtn(); //获取时间按钮是否可点击 void getTime(); //获取时间 void readTime(); //读取时间 void showError(QAbstractSocket::SocketError socketError); //显示错误信息 private: QLabel *serverNameLabel; //服务器地址 QLineEdit *serverNameLineEdit; QLabel *portLabel; //端口号 QLineEdit *portLineEdit; QDateTimeEdit *dateTimeEdit; //时间 QLabel *stateLabel; //提示QPushButton *getBtn; //获取时间 QPushButton *quitBtn; //退出uint time2u; //时间 QTcpSocket *tcpSocket; }; #endif // TIMECLIENT_H

timeclinet.cpp
#include "timeclient.h" #include #include #include #include #include TimeClient::TimeClient(QWidget *parent) : QDialog(parent) { setWindowTitle(tr("多线程时间服务客户端")); serverNameLabel =new QLabel(tr("服务器名：")); serverNameLineEdit = new QLineEdit("Localhost"); portLabel =new QLabel(tr("端口：")); portLineEdit = new QLineEdit; QGridLayout *layout = new QGridLayout; layout->addWidget(serverNameLabel,0,0); layout->addWidget(serverNameLineEdit,0,1); layout->addWidget(portLabel,1,0); layout->addWidget(portLineEdit,1,1); dateTimeEdit = new QDateTimeEdit(this); QHBoxLayout *layout1 = new QHBoxLayout; layout1->addWidget(dateTimeEdit); stateLabel =new QLabel(tr("请首先运行时间服务器！")); QHBoxLayout *layout2 = new QHBoxLayout; layout2->addWidget(stateLabel); getBtn = new QPushButton(tr("获取时间")); getBtn->setDefault(true); getBtn->setEnabled(false); quitBtn = new QPushButton(tr("退出")); QHBoxLayout *layout3 = new QHBoxLayout; layout3->addStretch(); layout3->addWidget(getBtn); layout3->addWidget(quitBtn); QVBoxLayout *mainLayout = new QVBoxLayout(this); mainLayout->addLayout(layout); mainLayout->addLayout(layout1); mainLayout->addLayout(layout2); mainLayout->addLayout(layout3); connect(serverNameLineEdit,SIGNAL(textChanged(QString)),this,SLOT(enableGetBtn())); connect(portLineEdit,SIGNAL(textChanged(QString)),this,SLOT(enableGetBtn())); connect(getBtn,SIGNAL(clicked()),this,SLOT(getTime())); connect(quitBtn,SIGNAL(clicked()),this,SLOT(close())); tcpSocket = new QTcpSocket(this); connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(readTime())); connect(tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(showError(QAbstractSocket::SocketError))); portLineEdit->setFocus(); }TimeClient::~TimeClient() {}void TimeClient::enableGetBtn() { getBtn->setEnabled(!serverNameLineEdit->text().isEmpty()&&!portLineEdit->text().isEmpty()); }void TimeClient::getTime() { getBtn->setEnabled(false); time2u =0; tcpSocket->abort(); //连接服务器 tcpSocket->connectToHost(serverNameLineEdit->text(),portLineEdit->text().toInt()); }void TimeClient::readTime() { QDataStream in(tcpSocket); in.setVersion(QDataStream::Qt_4_3); if(time2u==0) { if(tcpSocket->bytesAvailable()<(int)sizeof(uint)) return; in>>time2u; } dateTimeEdit->setDateTime(QDateTime::fromTime_t(time2u)); getBtn->setEnabled(true); }void TimeClient::showError(QAbstractSocket::SocketError socketError) { switch (socketError) { case QAbstractSocket::RemoteHostClosedError: break; case QAbstractSocket::HostNotFoundError: QMessageBox::information(this, tr("时间服务客户端"),tr("主机不可达！")); break; case QAbstractSocket::ConnectionRefusedError: QMessageBox::information(this, tr("时间服务客户端"),tr("连接被拒绝！")); break; default: QMessageBox::information(this, tr("时间服务客户端"),tr("产生如下错误: %1.").arg(tcpSocket->errorString())); } getBtn->setEnabled(true); }

    推荐阅读


    上一篇：中国铁建西派系，何以成为精装典范

    下一篇：OpenGL入门实例(2)-图元和其他