#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <QNetworkInterface>//網(wǎng)絡(luò)信息
#include <QHostAddress>//id地址
#include <QTcpServer> //tcp協(xié)議
#include <QTcpSocket> //socket套接字
#include <QDebug>
#include <QMessageBox>
namespace Ui {
class Widget;
}
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
 
private slots:
    void on_pushButton_listen_clicked();
 
    void on_pushButton_send_clicked();
    void newconnectslot();//連接
    void readyRead_Slot();//讀取信息
    void disconnected_Slot();//斷開
private slots:
    QString list_all_IPV4();
 
private:
    Ui::Widget *ui;
    //2、設(shè)置服務(wù)端和接收客戶端的對象
    QTcpServer *tcpServer;
    QTcpSocket *tcpSocket;
};
 
#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    //3、創(chuàng)建服務(wù)器對象
    tcpSocket=NULL;
    tcpServer=new QTcpServer(this);
    //5、有客戶端連接服務(wù)器發(fā)送信號
    connect(tcpServer,
            SIGNAL(newConnection()),
            this,
            SLOT(newconnectslot()));
    QMessageBox::information(this,"本機(jī)聯(lián)網(wǎng)端口顯示",this->list_all_IPV4());
}
 
Widget::~Widget()
{
    delete ui;
}
 
void Widget::on_pushButton_listen_clicked()
{
    //4、開始監(jiān)聽
    QString sever_Address = ui->lineEdit_address->text();
    quint16 port          = ui->lineEdit_port->text().toInt();
    QHostAddress host     = QHostAddress(sever_Address);
    if(!tcpServer->isListening()){
        //監(jiān)聽綁定的ip地址
        if(!tcpServer->listen(host,port))
        {
            qDebug()<<tcpServer->errorString();
            return;
        }else{
            qDebug()<<"監(jiān)聽成功";
            ui->pushButton_listen->setText("停止監(jiān)聽");
        }
    }else{
        tcpServer->close();
        ui->pushButton_listen->setText("開始監(jiān)聽");
    }
}
 
QString Widget::list_all_IPV4(){
            QString str;
            QList<QHostAddress> list=QNetworkInterface::allAddresses();     //獲取本機(jī)的所有網(wǎng)卡的ip地址
            foreach (QHostAddress address, list)
            {
                if(address.isNull())
                    continue;
                QAbstractSocket::NetworkLayerProtocol portocol=address.protocol();
                //只提取IPv4地址
                if(portocol!=QAbstractSocket::IPv4Protocol)
                    continue;
 
                str = str +'\n\t'+address.toString() + '\n\t\t';
            }
            return str;
};
 
void Widget::newconnectslot(){
    //6、接受客戶端
    tcpSocket = tcpServer->nextPendingConnection();
    QString client_Info = "客戶端:" + tcpSocket->peerAddress().toString()
                          +" "+
                          "端口號:"    + QString::number(tcpSocket->peerPort());
    ui->textBrowser_clientInfo->setText(client_Info);
    //發(fā)送信號和讀取關(guān)聯(lián)
    connect(tcpSocket,
            SIGNAL(readyRead()),
            this,
            SLOT(readyRead_Slot()));
    //斷開信號關(guān)聯(lián)客戶端
    connect(tcpSocket,
            SIGNAL(disconnected()),
            this,
            SLOT(disconnected_Slot()));
};
 
void Widget::on_pushButton_send_clicked()
{
    if(tcpSocket != nullptr)
    {
        if(tcpSocket->isWritable())
        {
            QString send = ui->plainTextEdit_sendInfo->toPlainText();
 
            QByteArray sendarr = send.toLocal8Bit();//本地字符集與Unicode的轉(zhuǎn)換
 
            tcpSocket->write(sendarr);
        }
    }
}
 
void Widget::readyRead_Slot(){
    if(tcpSocket != nullptr)
    {
        if(tcpSocket->isReadable())
        {
           QByteArray recvAll = tcpSocket->readAll();//將數(shù)據(jù)全部讀取
 
           QString str = str.fromLocal8Bit(recvAll.data());
 
           ui->textBrowser_recv->append(str);
        }
    }
 
};
 
void Widget::disconnected_Slot(){
    QMessageBox::information(this,"Client Close Signal","有客戶離開");
};

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <QNetworkInterface>//網(wǎng)絡(luò)信息
#include <QHostAddress>//id地址
#include <QTcpServer> //tcp協(xié)議
#include <QTcpSocket> //socket套接字
#include <QDebug>
#include <QMessageBox>
namespace Ui {
class Widget;
}
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
 
private slots:
    void on_pushButton_listen_clicked();
    void on_pushButton_send_clicked();
 
    void readyRead_Slot();//讀取信息
    void disconnected_Slot();//斷開
 
private:
    Ui::Widget *ui;
    QTcpSocket *client;
    bool socket_state;
};
 
#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    client = new QTcpSocket(this);
    socket_state = false;
 
    connect(client,
            SIGNAL(disconnected()),
            this,
            SLOT(disconnected_Slot()));
 
    connect(client,
            SIGNAL(readyRead()),
            this,
            SLOT(readyRead_Slot()));
}
 
Widget::~Widget()
{
    delete ui;
}
 
 
void Widget::on_pushButton_listen_clicked()
{
    QString ipAddress = ui->lineEdit_address->text();
    qint16 port = ui->lineEdit_port->text().toInt();
 
    if(!socket_state)
    {
        client->connectToHost(ipAddress,port);
        if(client->waitForConnected(3000)){//等待3s，連不上會返回假
            ui->pushButton_listen->setText("斷開連接");
            socket_state = true;
        }else{
            qDebug()<<client->errorString();
            return;
        }
    }else{
        client->close();
        QMessageBox::information(this,"消息提示","已經(jīng)離開!",QMessageBox::Yes);
        ui->pushButton_listen->setText("連接");
        socket_state = false;
    }
}
 
void Widget::readyRead_Slot(){
    QByteArray data=client->readAll();
    QString str=str.fromLocal8Bit(data.data());
    ui->textBrowser_recv->append(str);
 
};
 
void Widget::disconnected_Slot(){
     qDebug()<<"離開";
}
 
void Widget::on_pushButton_send_clicked()
{
    QString datastr = ui->plainTextEdit_sendInfo->toPlainText();
    QByteArray da = datastr.toLocal8Bit();
 
    if(client->isOpen() && client->isValid()){
        client->write(da);
    }
}

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
 
//1、包含相關(guān)的頭文件
#include <QHostAddress>
#include <QUdpSocket>
#include <QDebug>
 
namespace Ui {
class Widget;
}
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
 
private slots:
    void on_pushButtonSend_clicked();
    void readyReadSlot();
    void on_pushButtonCLose_clicked();
 
private:
    Ui::Widget *ui;
    //2、定義udp對象
    QUdpSocket *udpSocket;
};
 
#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    //3、創(chuàng)建對象
    udpSocket=new QUdpSocket(this);
 
    //4、關(guān)聯(lián)讀取的信號與槽
    connect(udpSocket,SIGNAL(readyRead()),this,SLOT(readyReadSlot()));
 
}
 
Widget::~Widget()
{
    delete ui;
}
 
void Widget::on_pushButtonSend_clicked()
{
    udpSocket->writeDatagram(ui->plainTextEdit_sendInfo->toPlainText().toLocal8Bit(),//內(nèi)容
                             QHostAddress(ui->lineEditIp->text()),//發(fā)送ip
                             ui->lineEditPort->text().toInt());//發(fā)送的地址
}
 
void Widget::on_pushButtonCLose_clicked()
{
    udpSocket->bind(ui->lineEditPort_2->text().toInt());
}
 
void Widget::readyReadSlot(){
  quint64 size = udpSocket->bytesAvailable();//讀取發(fā)過來的消息大小
  QByteArray ba;
  ba.resize(size);
  QHostAddress address;
  quint16 port;
 
  udpSocket->readDatagram(ba.data(),size,&address,&port);
  QString str = QString::fromLocal8Bit(ba.data());
 
  ui->textEdit_recvInfo->append(str);
}