QT实现tcp通信(Server服务器端)

QT实现tcp通信(Server服务器端)

右键点击列表连接的IP可以弹出删除按钮。

客户端参考https://txwtech.blog.csdn.net/article/details/125388830?spm=1001.2014.3001.5502

 QT_TCP_server_full服务器端.rar-QT文档类资源-CSDN下载QT_TCP_server_full服务器端.rarhttps://blog.csdn.net/t更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/txwtech/86269840

头文件：

#ifndef SERVER_H
#define SERVER_H

#include 
#include 
#include 
#include 

QT_BEGIN_NAMESPACE
namespace Ui { class Server;


             }
QT_END_NAMESPACE
class QTcpServer;

class Server : public QMainWindow
{
    Q_OBJECT

public:
    Server(QWidget *parent = nullptr);
    ~Server();

private:
    Ui::Server *ui;

    QTcpServer *tcpServer;
    QTcpSocket *client;
    QList tcpClients;
    QListWidgetItem *lwdgitem;
    QMenu *iplistMenu;
     QAction* actiondel = NULL;

private slots:
    QString GetLocalIP();
    void on_pushButton_StartToListen_clicked();
    //void on_listView_IP_List_customContextMenuRequested(const QPoint &pos);
    void on_listWidget_IP_customContextMenuRequested(const QPoint &pos);
    void slot_newConnectionClient();
    void slot_readData();
    void slot_disconnectedClient();

    void on_pushButton_Send_clicked();
    void slot_delmenu();
};
#endif // SERVER_H

源文件：

#include "server.h"
#include "ui_server.h"

#include  //在pro文件里面添加QT+=network
#include 

Server::Server(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::Server)
{
    ui->setupUi(this);
    tcpServer=new QTcpServer(this);
    QString ip = GetLocalIP();
    if(ip.isEmpty())
    {
        QMessageBox::about(this,tr("提示"),tr("没有获取到本机的IP"));
    }
    else
    {
        ui->lineEdit_Local_IP->setText(ip);
    }
   // QTextCodec::setCodecForLocale(QTextCodec::codecForName("GBK"));


    ui->listWidget_IP->setContextMenuPolicy(Qt::CustomContextMenu);//右键点击，弹出菜单
    ui->label_hostName->setText(tr("HostName:")+QHostInfo::localHostName());
    ui->label_hostName->adjustSize();
    ui->lineEdit_Local_Port->setText(tr("6666"));
    ui->plainTextEdit_Send_Msg->setPlainText("I am Server您好");
    ui->pushButton_StartToListen->setEnabled(true);
    ui->pushButton_Send->setEnabled(false);
    iplistMenu=new QMenu(ui->listWidget_IP);//菜单绑定到列表控件，by txwtech
   // QAction *pnew0 = new QAction(QString::fromLocal8Bit("Delete"),ui->listWidget_IP);
    QAction *pnew0 = new QAction("删除",ui->listWidget_IP);
    iplistMenu->addAction(pnew0);
   // connect( ui->actiondel, SIGNAL(triggered()), this, SLOT(slot_delmenu()));
    connect( pnew0, SIGNAL(triggered()), this, SLOT(slot_delmenu()));
    connect(tcpServer,SIGNAL(newConnection()),this,SLOT(slot_newConnectionClient()));





}
//“删除”菜单，断开指定Client
void Server:: slot_delmenu()
{
    if(  lwdgitem != NULL )
    {
        if( !tcpClients.isEmpty() ){
            QString clientIP = lwdgitem->text().split(":")[0];
            int clientPort = lwdgitem->text().split(":")[1].toInt();
            for(int i=0; ipeerAddress().toString()==clientIP && tcpClients[i]->peerPort()==clientPort)
                {
                    tcpClients[i]->disconnectFromHost();
                    break;
                }
            }
        }
    }
}

void Server::slot_newConnectionClient()
{
    while(tcpServer->hasPendingConnections())
    {
        QTcpSocket *client=tcpServer->nextPendingConnection();
        tcpClients.append(client);
        ui->listWidget_IP->addItem(tr("%1:%2").arg(client->peerAddress().toString()).arg(client->peerPort()));
        connect(client,SIGNAL(readyRead()),this,SLOT(slot_readData()));
        connect(client,SIGNAL(disconnected()),this,SLOT(slot_disconnectedClient()));

    }
}
void Server::slot_readData()
{
    QTcpSocket *obj=(QTcpSocket*)sender();
    QByteArray buf=obj->readAll();
    if(buf.isEmpty())
        return;
    QString ipc;
    ipc=tr("[%1:%2]").arg(obj->peerAddress().toString()).arg(obj->peerPort());
    ui->textEdit_Recv_Msg->append(ipc);
  //  ui->textEdit_Recv_Msg->append(QString::fromLocal8Bit(buf));
   // toUtf8
    ui->plainTextEdit_Recv_Msg->appendPlainText(ipc);
    ui->plainTextEdit_Recv_Msg->appendPlainText(QString::fromLocal8Bit(buf)); //fromLocal8Bit显示中文，解决乱码



}
void Server::slot_disconnectedClient()
{
  if(!tcpClients.isEmpty())
  {
      QTcpSocket *obj=(QTcpSocket*) sender();

      QListWidgetItem *item=ui->listWidget_IP->findItems(
                  tr("%1:%2")\
                  .arg( obj->peerAddress().toString())\
                  .arg( obj->peerPort()),Qt::MatchContains|Qt::MatchEndsWith
                  ).at(0);
      ui->listWidget_IP->removeItemWidget(item);
      delete item;
      obj->close();
      tcpClients.removeOne(obj);


  }
}


QString Server::GetLocalIP()
{
    QList list=QNetworkInterface::allAddresses();
    foreach(QHostAddress address,list)
    {
        if(address.protocol()==QAbstractSocket::IPv4Protocol)
        {
            return address.toString();
        }
    }
    return "";
}

Server::~Server()
{
    delete ui;
}


void Server::on_pushButton_StartToListen_clicked()
{
    if(ui->pushButton_StartToListen->text()=="停止")
    {
        if(!tcpClients.isEmpty())
            for(int i=0;idisconnectFromHost();
            }
        tcpClients.clear();
        tcpServer->close();
        ui->listWidget_IP->clear();
        ui->pushButton_StartToListen->setText("监听");
       ui->pushButton_Send->setEnabled(false);





    }
    else
    {
        if(ui->lineEdit_Local_Port->text().toInt()==0)
        {
            QMessageBox::about(this,tr("提示"),tr("请输入端口号"));
        }
        else if(tcpServer->listen(QHostAddress::AnyIPv4,ui->lineEdit_Local_Port->text().toInt()))
        {
            ui->pushButton_StartToListen->setText("停止");
            ui->pushButton_Send->setEnabled(true);
        }




    }

}


void Server::on_listWidget_IP_customContextMenuRequested(const QPoint &pos)
{
    lwdgitem = ui->listWidget_IP->itemAt(pos);
    if(lwdgitem!=NULL)
    {
        iplistMenu->exec(QCursor::pos());
    }



}

void Server::on_pushButton_Send_clicked()
{
    if(ui->listWidget_IP->selectedItems().length()>0)
    {
        foreach(QListWidgetItem* item, ui->listWidget_IP->selectedItems())
        {
            QString clientIP=item->text().split(":")[0];
            int clientPort=item->text().split(":")[1].toInt();
            for(int i=0;ipeerAddress().toString()==clientIP &&tcpClients[i]->peerPort()==clientPort)
                {
                   // tcpClients[i]->write(ui->plainTextEdit_Send_Msg->toPlainText().toUtf8());
                     tcpClients[i]->write(ui->plainTextEdit_Send_Msg->toPlainText().toLocal8Bit());fromLocal8Bit显示中文，解决乱码
                }
            }

        }
    }
    else
    {
        QMessageBox::information(this,"提示","IP列表未选择");
    }



}