Qt之QTcpServer/QTcpSocket简单收发信息（1）

转自：http://blog.csdn.net/wyz365889/article/details/7070284

用QT包装好的东西做socket类东西，我只能说啥这么简单呢。

waitForConnected() 等待链接的建立
waitForReadyRead() 等待新数据的到来
waitForBytesWritten() 等待数据写入socket
waitForDisconnected() 等待链接断开

开始前在项目.pro里面添加如下：

       QT += core guinetwork

=========server==============

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1. #include "testnet.h"   
2. #include "ui_testnet.h"   
3. #include <QtGui>   
4. Testnet::Testnet(QWidget *parent) :  
5.     QMainWindow(parent),  
6.     ui(new Ui::Testnet)  
7. {  
8.     ui->setupUi(this);  
9.   
10.   
11.     this->connect(ui->pushButton_start,SIGNAL(clicked()),this,SLOT(startTcpserver()));  
12.     this->connect(ui->pushButton_send,SIGNAL(clicked()),this,SLOT(sendMessage()));  
13. }  
14.   
15. Testnet::~Testnet()  
16. {  
17.     delete ui;  
18. }  
19.   
20. void Testnet::startTcpserver()  
21. {  
22.     m_tcpServer = new QTcpServer(this);  
23.   
24.     m_tcpServer->listen(QHostAddress::Any,19999); //监听任何连上19999端口的ip  
25.   
26.     connect(m_tcpServer,SIGNAL(newConnection()),this,SLOT(newConnect())); //新连接信号触发，调用newConnect()槽函数，这个跟信号函数一样，其实你可以随便取。  
27. }  
28.   
29. void Testnet::newConnect()  
30. {  
31.         m_tcpSocket = m_tcpServer->nextPendingConnection(); //得到每个连进来的socket  
32.         connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMessage())); //有可读的信息，触发读函数槽  
33.   
34. }  
35.   
36. void Testnet::readMessage() //读取信息  
37. {  
38. //    ui->textEdit_rec->te   
39.     QByteArray qba= m_tcpSocket->readAll(); //读取  
40.     qDebug()<<qba;  
41.     QString ss=QVariant(qba).toString();  
42.     ui->textEdit_rec->setText(ss);  
43.   
44. }  
45.   
46. void Testnet::sendMessage() //发送信息  
47. {  
48.     QString strMesg= ui->lineEdit_sendmessage->text();  
49.     qDebug()<<strMesg;  
50.     m_tcpSocket->write(strMesg.toStdString().c_str(),strlen(strMesg.toStdString().c_str())); //发送  
51. }  

#include "testnet.h"#include "ui_testnet.h"#include <QtGui>Testnet::Testnet(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::Testnet){    ui->setupUi(this);    this->connect(ui->pushButton_start,SIGNAL(clicked()),this,SLOT(startTcpserver()));    this->connect(ui->pushButton_send,SIGNAL(clicked()),this,SLOT(sendMessage()));}Testnet::~Testnet(){    delete ui;}void Testnet::startTcpserver(){    m_tcpServer = new QTcpServer(this);    m_tcpServer->listen(QHostAddress::Any,19999); //监听任何连上19999端口的ip    connect(m_tcpServer,SIGNAL(newConnection()),this,SLOT(newConnect())); //新连接信号触发，调用newConnect()槽函数，这个跟信号函数一样，其实你可以随便取。}void Testnet::newConnect(){        m_tcpSocket = m_tcpServer->nextPendingConnection(); //得到每个连进来的socket        connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMessage())); //有可读的信息，触发读函数槽}void Testnet::readMessage()//读取信息{//    ui->textEdit_rec->te    QByteArray qba= m_tcpSocket->readAll(); //读取    qDebug()<<qba;    QString ss=QVariant(qba).toString();    ui->textEdit_rec->setText(ss);}void Testnet::sendMessage() //发送信息{    QString strMesg= ui->lineEdit_sendmessage->text();    qDebug()<<strMesg;    m_tcpSocket->write(strMesg.toStdString().c_str(),strlen(strMesg.toStdString().c_str())); //发送}

=======client========

[cpp] view plaincopyprint?

1. #include "testnet_c.h"   
2. #include "ui_testnet_c.h"   
3.   
4.   
5.   
6. testnet_c::testnet_c(QWidget *parent) :  
7.     QMainWindow(parent),  
8.     ui(new Ui::testnet_c)  
9. {  
10.     ui->setupUi(this);  
11.   
12.     this->connect(ui->pushButton_con,SIGNAL(clicked()),this,SLOT(connectServer()));  
13.     this->connect(ui->pushButton_send,SIGNAL(clicked()),this,SLOT(sendMesg()));  
14. }  
15.   
16. testnet_c::~testnet_c()  
17. {  
18.     delete ui;  
19. }  
20.   
21.   
22. void testnet_c::connectServer()  
23. {  
24.     m_tcpSocket = new QTcpSocket(this);  
25.     m_tcpSocket->abort();  
26.     m_tcpSocket->connectToHost("192.168.1.178",19999);  
27.   
28.     connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMesg()));  
29. }  
30.   
31. void testnet_c::readMesg() //读取信息  
32. {  
33.    QByteArray qba =   m_tcpSocket->readAll();  
34.   
35.    ui->textEdit_recmesg->clear();  
36.   
37.    qDebug()<<qba;  
38.    QString ss=QVariant(qba).toString();  
39.    ui->textEdit_recmesg->setText(ss);  
40. }  
41.   
42. void testnet_c::sendMesg() //发送信息  
43. {  
44.     QString ss= ui->lineEdit_sendmesg->text();  
45.     m_tcpSocket->write(ss.toStdString().c_str(),strlen(ss.toStdString().c_str()));  
46.     ui->lineEdit_sendmesg->clear();  
47. }  

#include "testnet_c.h"#include "ui_testnet_c.h"testnet_c::testnet_c(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::testnet_c){    ui->setupUi(this);    this->connect(ui->pushButton_con,SIGNAL(clicked()),this,SLOT(connectServer()));    this->connect(ui->pushButton_send,SIGNAL(clicked()),this,SLOT(sendMesg()));}testnet_c::~testnet_c(){    delete ui;}void testnet_c::connectServer(){    m_tcpSocket = new QTcpSocket(this);    m_tcpSocket->abort();    m_tcpSocket->connectToHost("192.168.1.178",19999);    connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMesg()));}void testnet_c::readMesg() //读取信息{   QByteArray qba =   m_tcpSocket->readAll();   ui->textEdit_recmesg->clear();   qDebug()<<qba;   QString ss=QVariant(qba).toString();   ui->textEdit_recmesg->setText(ss);}void testnet_c::sendMesg() //发送信息{    QString ss= ui->lineEdit_sendmesg->text();    m_tcpSocket->write(ss.toStdString().c_str(),strlen(ss.toStdString().c_str()));    ui->lineEdit_sendmesg->clear();}

 

实验结果如下：