电子商务网站建设含代码,项目外包是什么意思,网站免费在线观看,官网网页制作最近要在QT下开发Tcp通讯#xff0c;发送序列化数据以便于接收。 这里涉及到几个问题#xff1a; 1.QTcpSocket、QTcpServer的通讯 2.QDataStream序列化数据 多的不说#xff0c;直接上干货#xff01;#xff01;#xff01; 客户端#xff1a; tcpclient.h 1 #ifndef …最近要在QT下开发Tcp通讯发送序列化数据以便于接收。 这里涉及到几个问题 1.QTcpSocket、QTcpServer的通讯 2.QDataStream序列化数据 多的不说直接上干货 客户端 tcpclient.h 1 #ifndef TCPCLIENT_H2 #define TCPCLIENT_H3 4 #include QMainWindow5 #include qt4/Qt/qtcpsocket.h6 #include Qt/qhostinfo.h7 #include QDataStream8 #include QtNetwork9
10
11
12 struct Control_Motor
13 {
14 int length;
15 int command;
16 QString data;
17 };
18
19
20 class Motor
21 {
22 public:
23 Motor(){}
24 Motor(int speed,int accele_speed,int p_some)
25 {
26 m_speed speed;
27 m_accele_speed accele_speed;
28 m_p_some p_some;
29 }
30
31
32
33 public:
34 int getV(){return m_speed;}
35 int getA(){return m_accele_speed;}
36 int getP(){return m_p_some;}
37
38 void setV(const int v){m_speed v;}
39 void setA(const int a){m_accele_speed a;}
40 void setP(const int p){m_p_some p;}
41
42
43
44 public:
45 //friend QDataStream operator (QDataStream out,const Motor motor);
46 //friend QDataStream operator (QDataStream in,Motor motor);
47 /*
48 friend QDataStream operator (QDataStream out,Motor motor)
49 {
50 out motor.m_speedmotor.m_p_somemotor.m_accele_speed;
51 qDebug() motor.m_speedmotor.m_p_somemotor.m_accele_speedEnter in this;
52 return out;
53 }
54 */
55 public:
56 int m_speed;
57 int m_accele_speed;
58 int m_p_some;
59
60 };
61
62
63 namespace Ui {
64 class TcpClient;
65 }
66
67 class TcpClient : public QMainWindow
68 {
69 Q_OBJECT
70
71 public:
72 explicit TcpClient(QWidget *parent 0);
73 ~TcpClient();
74
75 private:
76 Ui::TcpClient *ui;
77 QTcpSocket *tcpClient;
78
79
80 private slots:
81 void slotConnect();
82 void readMessage();
83 void displayError(QAbstractSocket::SocketError);
84 void sendMessage();
85
86
87
88 public:
89 Control_Motor control_Motor;
90
91 Motor *m_motor;
92
93 };
94
95
96 #endif // TCPCLIENT_H tcpclient.cpp 1 #include tcpclient.h2 #include ui_tcpclient.h3 #include QFile4 #include QDataStream5 6 7 QDataStream operator(QDataStream out,const Motor motor)8 {9 //qDebug() motor.m_speedmotor.m_p_somemotor.m_accele_speedEnter in;10 out motor.m_speedmotor.m_p_somemotor.m_accele_speed;11 //qDebug() motor.m_speedmotor.m_p_somemotor.m_accele_speedEnter in this;12 return out;13 }14 15 QDataStream operator (QDataStream in,Motor motor)16 {17 int speed 0;18 int accele_speed 0;19 int p_some 0;20 21 in speed p_some accele_speed;22 23 motor.setV(speed);24 motor.setP(p_some);25 motor.setA(accele_speed);26 27 return in;28 }29 Q_DECLARE_METATYPE(Motor)30 31 32 TcpClient::TcpClient(QWidget *parent) :33 QMainWindow(parent),34 ui(new Ui::TcpClient)35 {36 ui-setupUi(this);37 38 qRegisterMetaTypeMotor(Motor);39 40 tcpClient new QTcpSocket(this);41 connect(ui-Connect_Btn,SIGNAL(clicked()),this,SLOT(slotConnect()));42 connect(ui-Send_Btn,SIGNAL(clicked()),this,SLOT(sendMessage()));43 connect(tcpClient, SIGNAL(readyRead()), this, SLOT(readMessage()));44 connect(tcpClient, SIGNAL(error(QAbstractSocket::SocketError)), this,45 SLOT(displayError(QAbstractSocket::SocketError)));46 }47 48 TcpClient::~TcpClient()49 {50 delete ui;51 }52 53 void TcpClient::slotConnect()54 {55 //QString stringAddress ui-ldt_IP-text();56 //QString stringPort ui-ldt_Port-text();57 QString stringAddress 192.168.154.128;58 QString stringPort 8080;59 int port stringPort.toInt();60 QHostAddress address;61 address.setAddress(stringAddress);62 tcpClient-abort();63 tcpClient-connectToHost(address,port);64 ui-Connect_Btn-setEnabled(false);65 }66 67 void TcpClient::readMessage()68 {69 70 }71 72 void TcpClient::displayError(QAbstractSocket::SocketError)73 {74 qDebug() tcpClient-errorString();75 }76 77 void TcpClient::sendMessage()78 {79 QString stringMotor ui-ldt_Motor-text();80 QString stringData ui-ldt_data-text();81 control_Motor.command stringMotor.toInt();82 int dataLength stringData.length();83 control_Motor.length 8 dataLength;84 control_Motor.data stringData;85 QString data stringMotorstringData;86 87 m_motor new Motor(20,40,60);88 89 //Motor m_motor(20,40,60);90 91 //用于暂存要发送的数据92 QByteArray block;93 //使用数据流写入数据94 QDataStream out(block,QIODevice::WriteOnly);95 //设置数据流的版本客户端和服务器端使用的版本要相同96 out.setVersion(QDataStream::Qt_4_6);97 out(quint32) 0;98 //设置发送长度初始值为099 //out control_Motor.lengthcontrol_Motor.commandcontrol_Motor.data;
100
101 //qDebug() control_Motor.lengthcontrol_Motor.commandcontrol_Motor.data;
102 //out
103 out control_Motor.command;
104 qDebug()Start outendl;
105 out *m_motor;
106 qDebug()End outendl;
107 qDebug() control_Motor.command m_motor-getA()m_motor-getP()m_motor-getV();
108 //回到字节流起始位置
109 out.device()-seek(0);
110 //重置字节流长度
111 //out (quint16) (block.size()-sizeof(quint16));
112 out (quint32)(block.size()- sizeof(quint32));
113 qDebug() block.size()block.size();
114
115 //往套接字缓存中写入数据并发送
116 tcpClient-write(block,block.size());
117 tcpClient-disconnectFromHost();
118 tcpClient-waitForDisconnected();
119
120 block.resize(0);
121 this-close();
122 //tcpClient-write(data.toLatin1(),data.size());
123 } 服务器端 tcpserver.h 1 ifndef TCPSERVER_H2 #define TCPSERVER_H3 4 #include QMainWindow5 #include qt4/Qt/qhostinfo.h6 #include server.h7 8 9 namespace Ui {
10 class TcpServer;
11 }
12
13 class TcpServer : public QMainWindow
14 {
15 Q_OBJECT
16
17 public:
18 explicit TcpServer(QWidget *parent 0);
19 ~TcpServer();
20
21 private:
22 Ui::TcpServer *ui;
23 int port;
24 Server *server;
25
26 protected slots:
27 void slotCreateServer();
28 void updateServer(QString,int);
29
30 };
31
32 #endif // TCPSERVER_H tcpserver.cpp 1 #include tcpserver.h2 #include ui_tcpserver.h3 #include QtNetwork/QNetworkInterface4 5 TcpServer::TcpServer(QWidget *parent) :6 QMainWindow(parent),7 ui(new Ui::TcpServer)8 {9 ui-setupUi(this);
10 port 8080;
11 QString address QNetworkInterface::allAddresses().first().toString();
12 QListQHostAddress list2 QNetworkInterface::allAddresses();
13 foreach (QHostAddress address, list2)
14 {
15 if(address.protocol() QAbstractSocket::IPv4Protocol)
16 ui-ldt_IP-setText(address.toString());
17 }
18 ui-ldt_Port-setText(QString::number(port));
19 connect(ui-Connect_Btn,SIGNAL(clicked()),this,SLOT(slotCreateServer()));
20 }
21
22 TcpServer::~TcpServer()
23 {
24 delete ui;
25 }
26
27 void TcpServer::slotCreateServer()
28 {
29 server new Server(this,port);
30 connect(server,SIGNAL(updateServer(QString,int)),this,SLOT(updateServer(QString,int)));
31 ui-Connect_Btn-setEnabled(false);
32 }
33
34 void TcpServer::updateServer(QString msg, int length)
35 {
36 ui-lwt_Text-addItem(msg.left(length));
37 } server.h 1 #ifndef SERVER_H2 #define SERVER_H3 4 #include qt4/Qt/qtcpserver.h5 #include qt4/Qt/qtcpsocket.h6 7 struct Control_Motor8 {9 int length;
10 int command;
11 QString data;
12 };
13
14
15 class Motor
16 {
17 public:
18 Motor(int speed,int accele_speed,int p_some)
19 {
20 m_speed speed;
21 m_accele_speed accele_speed;
22 m_p_some p_some;
23 }
24
25 Motor(){m_speed 0;}
26
27
28
29 public:
30 int getV(){return m_speed;}
31 int getA(){return m_accele_speed;}
32 int getP(){return m_p_some;}
33
34 void setV(const int v){m_speed v;}
35 void setA(const int a){m_accele_speed a;}
36 void setP(const int p){m_p_some p;}
37
38
39
40 private:
41 int m_speed;
42 int m_accele_speed;
43 int m_p_some;
44
45 };
46
47
48
49 class Server : public QTcpServer
50 {
51 Q_OBJECT
52
53 public:
54 Server(QObject *parents0,int port0);
55 QListQTcpSocket*TcpClientSocketList;
56 QTcpSocket *tcpClientSocket;
57 signals:
58 void updateServer(QString,int);
59
60 public slots:
61 void slotUpdateClient(QString,int);
62 void slotDisconnect(int);
63 // void slotnewconnection();
64 protected:
65 void incomingConnection(int socketDescriptor);
66
67 signals:
68 void updateClients(QString,int);
69 void disconnected(int);
70
71 protected slots:
72 void dataReceive();
73 void slotDisconnected();
74
75 public:
76 Control_Motor control_motor;
77 Motor m_mtor;
78 };
79
80 #endif // SERVER_H server.cpp 1 #include server.h2 3 QDataStream operator (QDataStream out,Motor motor)4 {5 out motor.getV()motor.getP()motor.getA();6 return out;7 }8 9 10 QDataStream operator (QDataStream in,Motor motor)11 {12 int speed motor.getV();13 int accele_speed motor.getA();14 int p_some motor.getP();15 16 in speed p_some accele_speed;17 18 motor.setV(speed);19 motor.setP(p_some);20 motor.setA(accele_speed);21 22 return in;23 }24 25 26 27 28 Server::Server(QObject *parent,int port) :29 QTcpServer(parent)30 {31 this-listen(QHostAddress::Any,port);32 }33 34 void Server::incomingConnection(int socketDescriptor)35 {36 tcpClientSocket new QTcpSocket(this);37 //tcpClientSocket this-nextPendingConnection();38 tcpClientSocket-setSocketDescriptor(socketDescriptor);39 TcpClientSocketList.append(tcpClientSocket);40 //connect(this,SIGNAL(updateClients(QString,int)),this,SLOT(slotUpdateClient(QString,int)));41 //connect(this,SIGNAL(updateClients(QString,int)),this,SLOT(slotUpdateClient(QString,int)));42 connect(this,SIGNAL(disconnected(int)),this,SLOT(slotDisconnect(int)));43 connect(tcpClientSocket,SIGNAL(readyRead()),this,SLOT(dataReceive()));44 connect(tcpClientSocket,SIGNAL(disconnected()),this,SLOT(slotDisconnected()));45 //connect(tcpClientSocket,SIGNAL(disconnected()),tcpClientSocket,SLOT(deleteLater()));46 47 }48 void Server::slotUpdateClient(QString msg,int length)49 {50 emit updateServer(msg,length);51 for (int i0;iTcpClientSocketList.count();i)52 {53 QTcpSocket *itemTcpClientSocketList.at(i);54 if (item-write(msg.toLatin1(),length)!length)55 continue;56 }57 }58 void Server::slotDisconnect(int socketDescriptor)59 {60 qDebug()__FILE____FUNCTION____LINE__endl;61 for (int i0;iTcpClientSocketList.count();i)62 if (TcpClientSocketList.at(i)-socketDescriptor()socketDescriptor)63 {64 TcpClientSocketList.removeAt(i);65 return;66 }67 }68 69 void Server::dataReceive()70 {71 qDebug()QQWQW11111111111111;72 //quint32 size 0;73 quint32 nextBlockSize 0;74 qDebug()TcpClientSocketList.count()TcpClientSocketList.count();75 //for(int i 0; i TcpClientSocketList.count();i)76 //{77 QDataStream in(tcpClientSocket);78 in.setVersion(QDataStream::Qt_4_6);79 if(nextBlockSize 0)80 {81 if(tcpClientSocket-bytesAvailable()sizeof(quint32))82 {83 //break;84 return;85 }86 innextBlockSize;87 qDebug()nextBlockSize;88 }89 if(nextBlockSize0xFFFF)90 {91 //break;92 return;93 }94 if(tcpClientSocket-bytesAvailable()nextBlockSize)95 {96 //break;97 return;98 }99
100 //incontrol_motor.lengthcontrol_motor.commandcontrol_motor.data;
101
102 //qDebug()control_motor.lengthcontrol_motor.commandcontrol_motor.data;
103 in control_motor.command m_mtor;
104 qDebug()control_motor.command m_mtor.getA()m_mtor.getP()m_mtor.getV();
105
106 //ui-SN_lineEdit_2-setText(QString(%1).arg(message_rev.SN));
107 //ui-IP_lineEdit-setText(message_rev.IP);
108 //ui-STATE_lineEdit_3-setText(message_rev.Condition);
109 //}
110 }
111
112 void Server::slotDisconnected()
113 {
114 qDebug()__FILE____FUNCTION____LINE__endl;
115 emit disconnected(tcpClientSocket-socketDescriptor());
116 } 在这里要特别说明一下在此遇到的几个问题希望能帮到大家也提醒一下自己。 1.在TcpClient.proTcpServer.pro里一定要注意加上QT network不然编译的时候QNetworkInterface、QHostAddress这些地方会报错误。 2.在QDataStream重载自定义的类的时候一开始把重载写在.h文件里编译的时候总是报Tcp_DataStream/TcpServer/server.h:49: error: multiple definition of operator(QDataStream, Motor)这个错误说实话这个问题真的困扰了我很久然后把重载函数放到.cpp文件里,编译通过简直是要命 3.QDataStream的nextBlock读取到的长度为发送的数据的长度而不是整个包的长度out (quint32)(block.size()- sizeof(quint32));如果直接写out (quint32)(block.size()读的时候数据将会不正常。 4.重载的时候一定要正确。 转载于:https://www.cnblogs.com/wanzaiyimeng/p/4572074.html
