QT TCP服务器和客户端示例程序

下面是一个简单的 Qt TCP 服务器和客户端示例，演示了如何使用 vSetDriver、vSetListener 和 vTcpServerStart 函数。假设 vSetDriver 和 vSetListener 是你定义的自定义函数。

TCP 服务器部分

tcpserver.h

#ifndef TCPSERVER_H
#define TCPSERVER_H#include <QTcpServer>
#include <QTcpSocket>class TcpServer : public QTcpServer
{Q_OBJECT
public:explicit TcpServer(QObject *parent = nullptr);void vSetDriver(QObject *driver);void vSetListener(QObject *listener);void vTcpServerStart(int port);signals:void log(QString message);void connected(quint32 addr, int port);void disconnected(quint32 addr, int port);void recvData(quint32 addr, int port, QByteArray data);protected:void incomingConnection(qintptr socketDescriptor) override;private slots:void onReadyRead();void onDisconnected();private:QObject *m_driver;QObject *m_listener;QTcpSocket *m_socket;
};#endif // TCPSERVER_H

tcpserver.cpp

#include "tcpserver.h"
#include <QHostAddress>TcpServer::TcpServer(QObject *parent) : QTcpServer(parent), m_driver(nullptr), m_listener(nullptr), m_socket(nullptr) {}void TcpServer::vSetDriver(QObject *driver)
{m_driver = driver;
}void TcpServer::vSetListener(QObject *listener)
{m_listener = listener;
}void TcpServer::vTcpServerStart(int port)
{if (!this->listen(QHostAddress::Any, port)) {emit log("Server could not start!");} else {emit log("Server started!");}
}void TcpServer::incomingConnection(qintptr socketDescriptor)
{m_socket = new QTcpSocket(this);connect(m_socket, &QTcpSocket::readyRead, this, &TcpServer::onReadyRead);connect(m_socket, &QTcpSocket::disconnected, this, &TcpServer::onDisconnected);m_socket->setSocketDescriptor(socketDescriptor);emit connected(m_socket->peerAddress().toIPv4Address(), m_socket->peerPort());
}void TcpServer::onReadyRead()
{QByteArray data = m_socket->readAll();emit recvData(m_socket->peerAddress().toIPv4Address(), m_socket->peerPort(), data);
}void TcpServer::onDisconnected()
{emit disconnected(m_socket->peerAddress().toIPv4Address(), m_socket->peerPort());m_socket->deleteLater();
}

TCP 客户端部分

tcpclient.h

#ifndef TCPCLIENT_H
#define TCPCLIENT_H#include <QTcpSocket>class TcpClient : public QObject
{Q_OBJECT
public:explicit TcpClient(QObject *parent = nullptr);void connectToServer(const QString &host, int port);void sendData(const QByteArray &data);signals:void log(QString message);void connected();void disconnected();void recvData(QByteArray data);private slots:void onReadyRead();void onConnected();void onDisconnected();private:QTcpSocket *m_socket;
};#endif // TCPCLIENT_H

tcpclient.cpp

#include "tcpclient.h"TcpClient::TcpClient(QObject *parent) : QObject(parent), m_socket(new QTcpSocket(this))
{connect(m_socket, &QTcpSocket::readyRead, this, &TcpClient::onReadyRead);connect(m_socket, &QTcpSocket::connected, this, &TcpClient::onConnected);connect(m_socket, &QTcpSocket::disconnected, this, &TcpClient::onDisconnected);
}void TcpClient::connectToServer(const QString &host, int port)
{m_socket->connectToHost(host, port);
}void TcpClient::sendData(const QByteArray &data)
{if (m_socket->state() == QAbstractSocket::ConnectedState) {m_socket->write(data);}
}void TcpClient::onReadyRead()
{QByteArray data = m_socket->readAll();emit recvData(data);
}void TcpClient::onConnected()
{emit log("Connected to server");emit connected();
}void TcpClient::onDisconnected()
{emit log("Disconnected from server");emit disconnected();
}

示例主程序

main.cpp

#include <QCoreApplication>
#include "tcpserver.h"
#include "tcpclient.h"int main(int argc, char *argv[])
{QCoreApplication a(argc, argv);TcpServer server;server.vSetDriver(&server);server.vSetListener(&server);server.vTcpServerStart(12345);TcpClient client;client.connectToServer("127.0.0.1", 12345);client.sendData("Hello, Server!");return a.exec();
}

main.pro

QT += core network
CONFIG += console
CONFIG -= app_bundleTEMPLATE = app
SOURCES += main.cpp \tcpserver.cpp \tcpclient.cppHEADERS += tcpserver.h \tcpclient.h

解释

• TcpServer 类：
  • vSetDriver 和 vSetListener 方法用于设置驱动和监听对象。
  • vTcpServerStart 方法用于启动服务器。
  • incomingConnection 方法处理新的连接。
  • onReadyRead 和 onDisconnected 方法分别处理数据接收和连接断开事件。
• TcpClient 类：
  • connectToServer 方法连接到服务器。
  • sendData 方法发送数据。
  • onReadyRead、onConnected 和 onDisconnected 方法分别处理数据接收、连接和断开事件。
• 主程序：
  • 创建并配置服务器和客户端对象。
  • 客户端连接到服务器并发送数据。

这个示例演示了如何使用 Qt 的网络模块创建一个简单的 TCP 服务器和客户端，并展示了如何通过自定义的 vSetDriver、vSetListener 和 vTcpServerStart 方法进行初始化和管理。

如何测试：

1. 准备项目结构

确保项目文件结构正确，并包含以下文件：

• tcpserver.h
• tcpserver.cpp
• tcpclient.h
• tcpclient.cpp
• main.cpp
• myproject.pro

2. 项目配置文件 (myproject.pro)

确保你的项目配置文件 (myproject.pro) 正确配置：

QT += core network
CONFIG += console
CONFIG -= app_bundleTEMPLATE = app
SOURCES += main.cpp \tcpserver.cpp \tcpclient.cppHEADERS += tcpserver.h \tcpclient.h

3. 编译项目

使用 qmake 和 make 编译项目。在终端中执行以下命令：

qmake myproject.pro
make

4. 运行测试

在编译成功后，运行生成的可执行文件。以下是测试步骤：

4.1 启动服务器

在一个终端中运行服务器部分：

./myproject

此时，服务器应该启动并监听端口 12345，等待客户端连接。

4.2 启动客户端

在另一个终端中运行客户端部分：

./myproject

此时，客户端应该连接到服务器并发送 “Hello, Server!” 消息。

5. 验证测试结果

检查服务器输出

服务器应该输出类似以下的日志信息：

Server started!
connect : 127.0.0.1(12345)
recv : 127.0.0.1(12345)

检查客户端输出

客户端应该输出类似以下的日志信息：

Connected to server

6. 修改和扩展

根据需要修改和扩展你的代码。例如，你可以在 recvData 信号处理函数中添加更多的处理逻辑，或者在客户端中添加接收服务器响应的功能。

7. 完整代码示例

tcpserver.h

#ifndef TCPSERVER_H
#define TCPSERVER_H#include <QTcpServer>
#include <QTcpSocket>class TcpServer : public QTcpServer
{Q_OBJECT
public:explicit TcpServer(QObject *parent = nullptr);void vSetDriver(QObject *driver);void vSetListener(QObject *listener);void vTcpServerStart(int port);signals:void log(QString message);void connected(quint32 addr, int port);void disconnected(quint32 addr, int port);void recvData(quint32 addr, int port, QByteArray data);protected:void incomingConnection(qintptr socketDescriptor) override;private slots:void onReadyRead();void onDisconnected();private:QObject *m_driver;QObject *m_listener;QTcpSocket *m_socket;
};#endif // TCPSERVER_H

tcpserver.cpp

#include "tcpserver.h"
#include <QHostAddress>TcpServer::TcpServer(QObject *parent) : QTcpServer(parent), m_driver(nullptr), m_listener(nullptr), m_socket(nullptr) {}void TcpServer::vSetDriver(QObject *driver)
{m_driver = driver;
}void TcpServer::vSetListener(QObject *listener)
{m_listener = listener;
}void TcpServer::vTcpServerStart(int port)
{if (!this->listen(QHostAddress::Any, port)) {emit log("Server could not start!");} else {emit log("Server started!");}
}void TcpServer::incomingConnection(qintptr socketDescriptor)
{m_socket = new QTcpSocket(this);connect(m_socket, &QTcpSocket::readyRead, this, &TcpServer::onReadyRead);connect(m_socket, &QTcpSocket::disconnected, this, &TcpServer::onDisconnected);m_socket->setSocketDescriptor(socketDescriptor);emit connected(m_socket->peerAddress().toIPv4Address(), m_socket->peerPort());
}void TcpServer::onReadyRead()
{QByteArray data = m_socket->readAll();emit recvData(m_socket->peerAddress().toIPv4Address(), m_socket->peerPort(), data);
}void TcpServer::onDisconnected()
{emit disconnected(m_socket->peerAddress().toIPv4Address(), m_socket->peerPort());m_socket->deleteLater();
}

tcpclient.h

#ifndef TCPCLIENT_H
#define TCPCLIENT_H#include <QTcpSocket>class TcpClient : public QObject
{Q_OBJECT
public:explicit TcpClient(QObject *parent = nullptr);void connectToServer(const QString &host, int port);void sendData(const QByteArray &data);signals:void log(QString message);void connected();void disconnected();void recvData(QByteArray data);private slots:void onReadyRead();void onConnected();void onDisconnected();private:QTcpSocket *m_socket;
};#endif // TCPCLIENT_H