肖港网站开发,做网站练手,多语种网站制作,现代企业网站建设特点tcp编程中写的一个简单的单项传输数据的小例子#xff0c;和上一节一样#xff0c;分为客户端和服务端程序#xff0c;下面看一下界面的效果。 创建的方法和之前一样#xff0c;上面上代码#xff1a; 客户端 Client.h
#ifndef CLIENT_H
#define CLIENT_H#include …tcp编程中写的一个简单的单项传输数据的小例子和上一节一样分为客户端和服务端程序下面看一下界面的效果。 创建的方法和之前一样上面上代码 客户端 Client.h
#ifndef CLIENT_H
#define CLIENT_H#include QDialog
#include QAbstractSocketQT_BEGIN_NAMESPACE
namespace Ui { class Client; }
QT_END_NAMESPACE
class QTcpSocket;
class Client : public QDialog
{Q_OBJECTpublic:Client(QWidget *parent nullptr);~Client();private slots:void displayTip();void errorTip(QAbstractSocket::SocketError);void on_sendButton_clicked();void on_connectButton_clicked(bool checked);void on_textEdit_cursorPositionChanged();private:Ui::Client *ui;QTcpSocket *tcpClient;qint8 flag;
};
#endif // CLIENT_HClient.cpp
#include client.h
#include ui_client.h
#include QtNetwork
#include QMessageBox
#include QDebug
/*问题描述
1 再次输入要发送的文本时上次发送成功的提示依旧存在
2 断开连接后上次发送成功的提示依旧存在*/
Client::Client(QWidget *parent): QDialog(parent), ui(new Ui::Client),flag(0)
{ui-setupUi(this);setWindowTitle(tr(客户端));tcpClient new QTcpSocket(this);connect(tcpClient,QTcpSocket::connected,this,Client::displayTip);void (QTcpSocket:: *errorSign)(QAbstractSocket::SocketError) QTcpSocket::error;connect(tcpClient,errorSign,this,Client::errorTip);ui-connectButton-setText(tr(连接));ui-statusLabel-setText(tr(未连接));ui-tipLabel-setText(tr( ));ui-sendButton-setEnabled(false);
}Client::~Client()
{delete ui;
}void Client::displayTip()
{ui-statusLabel-setText(tr(连接成功));ui-sendButton-setEnabled(true);
}void Client::errorTip(QAbstractSocket::SocketError)
{qDebug()发生错误tcpClient-errorString();tcpClient-abort();ui-statusLabel-setText(tr(连接已断开));ui-tipLabel-setText(tr( ));ui-connectButton-setText(tr(连接));flag 1;// qDebug()flag 1;
}void Client::on_sendButton_clicked()
{QString str ui-textEdit-toPlainText();QByteArray text str.toUtf8();//返回一个字符串的utf-8形式可以表示所有字符
// QByteArray text str.toLatin1();//只能输出英文和数字即拉丁文,汉字会被代替
// QByteArray text str.toLocal8Bit();//只能输出英文和数字汉字会被乱码qint64 bytes tcpClient-write(text);if(bytes 0){
// qDebug()发送成功;ui-textEdit-clear();ui-tipLabel-setText(tr(数据发送成功!));}
}void Client::on_connectButton_clicked(bool checked)
{if(ui-IPLineEdit-text().isEmpty() || ui-portLineEdit-text().isEmpty()){QMessageBox::information(this,tr(警告),tr(请查看主机名或端口是否已输入));return ;}if(checked || flag 1){ui-connectButton-setText(tr(断开连接));ui-statusLabel-setText(tr(连接中......));ui-tipLabel-setText(tr( ));tcpClient-connectToHost(ui-IPLineEdit-text(),ui-portLineEdit-text().toInt());}else{ui-connectButton-setText(tr(连接));ui-statusLabel-setText(tr(未连接));ui-tipLabel-setText(tr( ));
// tcpClient-disconnectFromHost();//等待所有数据传输完成后关闭套接字
// tcpClient-close();//不会立即关闭套接字tcpClient-abort();//立即关闭套接字}
}void Client::on_textEdit_cursorPositionChanged()
{ui-tipLabel-setText(tr( ));
}服务端的程序 Server.h
#ifndef SERVER_H
#define SERVER_H#include QDialog
#include QAbstractSocketQT_BEGIN_NAMESPACE
namespace Ui { class Server; }
QT_END_NAMESPACEclass QTcpServer;
class QTcpSocket;class Server : public QDialog
{Q_OBJECTpublic:Server(QWidget *parent nullptr);~Server();private slots:void dataDisplayTip();void recevieData();void dealData();void errorTip(QAbstractSocket::SocketError);void on_listenButton_clicked();void on_disconnectButton_clicked();private:Ui::Server *ui;QTcpServer * myServer;QTcpSocket *socketConnected;
};
#endif // SERVER_HServer.cpp
#include server.h
#include ui_server.h
#include QtNetwork
#include QTimer
#include QDebug/*问题描述
1 客户端单一方面断开与服务器的连接时服务器不应该显示为连接异常
2 服务器在与客户端连接的过程中可以选择单方面断开与客户端的连接
3 客户端发送中文时服务端显示乱码*/Server::Server(QWidget *parent): QDialog(parent), ui(new Ui::Server)
{ui-setupUi(this);myServer new QTcpServer(this);connect(myServer,QTcpServer::newConnection,this,Server::recevieData);
// connect(myServer,QTcpServer::connected,this,Server::tipInfo);ui-statusLabel-setText(tr(未建立连接));ui-RecevieDataLabel-setText(tr( ));}Server::~Server()
{delete ui;
}void Server::dataDisplayTip()
{ui-RecevieDataLabel-setText(tr( ));
}void Server::recevieData()
{ui-statusLabel-setText(tr(连接成功));socketConnected myServer-nextPendingConnection();connect(socketConnected,QTcpSocket::readyRead,this,Server::dealData);void (QTcpSocket:: *errorSign)(QAbstractSocket::SocketError) QTcpSocket::error;connect(socketConnected,errorSign,this,Server::errorTip);myServer-close();
}void Server::dealData()
{if(socketConnected-bytesAvailable()0){QString str socketConnected-readAll();//QByteArray dataui-textEdit-append(str);ui-RecevieDataLabel-setText(tr(消息接收完成));QTimer *timer new QTimer(this);connect(timer,SIGNAL(timeout()),this,SLOT(dataDisplayTip()));timer-start(2000);}
}void Server::errorTip(QAbstractSocket::SocketError)
{qDebug()socketConnected-errorString();ui-listenButton-setEnabled(true);socketConnected-close();myServer-close();ui-statusLabel-setText(tr(连接中断));ui-RecevieDataLabel-setText(tr( ));
}void Server::on_listenButton_clicked()
{if(!myServer-listen(QHostAddress::LocalHost,6787)){qDebug()监听失败;ui-statusLabel-setText(tr(监听失败));myServer-close();}ui-statusLabel-setText(tr(监听成功));ui-RecevieDataLabel-setText(tr( ));ui-listenButton-setEnabled(false);
}void Server::on_disconnectButton_clicked()
{ui-statusLabel-setText(tr(连接中断));ui-RecevieDataLabel-setText(tr( ));ui-listenButton-setEnabled(true);socketConnected-disconnectFromHost();myServer-close();
}先运行服务端程序点击监听按钮再运行客户端程序输入IP和端口同样程序之间实现的是本地地址通信端口6787主机名或ip都可以点击连接若主机名和IP没有填写直接点击连接会弹出提示窗口提示查看IP和端口的填写情况对话框下面会显示连接状态连接成功后输入要发送的内容点击发送按钮可以发送信息会有相应的发送和接收数据成功与否的显示。 效果图如下 该注意的点 在数据传输的过程中编码格式的一致否则会导致乱码代码中含有我对与一些函数的理解加以记录以备后用。
