qt中的tcp编程

1.server.h
#define DIALOG_H

#include <QDialog>
#include <QTcpServer>
#include <QTcpSocket>
#include<QHostAddress>
namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
Q_OBJECT

public:
explicit Dialog(QWidget *parent = 0);
~Dialog();

private slots:
void on_pushButton_clicked();

void on_pushButton_2_clicked();

private:
Ui::Dialog *ui;
QTcpServer *p;
QTcpSocket *newp;//产生的新socket
QHostAddress *hp;
public slots:
void apprecvconnect();//处理连接函数
void getmsg();
};

#endif // DIALOG_H

#include "dialog.h"
#include "ui_dialog.h"
#include<QString>
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
p = new QTcpServer();

// newp = new QTcpSocket();
hp = new QHostAddress("192.168.1.30");
connect(p,SIGNAL(newConnection()),this,SLOT(apprecvconnect()));
}

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

void Dialog::on_pushButton_clicked()
{
p->listen(*hp,6000);

}
void Dialog::apprecvconnect()
{
newp = p->nextPendingConnection();
connect(newp,SIGNAL(readyRead()),this,SLOT(getmsg()));

}
void Dialog::getmsg()
{
QByteArray tmp = newp->readAll();
QString tmp2(tmp);
ui->label_2->setText(tmp2);
}

void Dialog::on_pushButton_2_clicked()
{
QString tmp = ui->lineEdit->text();
newp->write(tmp.toLatin1());
}

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include<QTcpServer>
#include<QTcpSocket>
#include<QHostAddress>
#include<QMessageBox>
namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
Q_OBJECT

public:
explicit Dialog(QWidget *parent = 0);
~Dialog();

private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();

public slots:
void sett();
void getmsg();

private:
Ui::Dialog *ui;
QTcpSocket *p;
QHostAddress *hp;
};

#endif // DIALOG_H

#include "dialog.h"
#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
p= new QTcpSocket();
hp = new QHostAddress("192.168.1.30");
}

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

void Dialog::on_pushButton_clicked()
{
p->connectToHost(*hp,6000);
connect(p,SIGNAL(connected()),this,SLOT(sett()));
}
void Dialog::sett()
{
QMessageBox::about(this,"about","connect success");
connect(p,SIGNAL(readyRead()),this,SLOT(getmsg()));

}
void Dialog::getmsg()
{
QByteArray tmp = p->readAll();
QString tmp2(tmp);
ui->label_2->setText(tmp2);
}
void Dialog::on_pushButton_2_clicked()
{
QString tmp = ui->lineEdit->text();
p->write(tmp.toLatin1());
}

#ifndef UI_DIALOG_H
#define UI_DIALOG_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QDialog>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QLabel>
#include <QtWidgets/QLineEdit>
#include <QtWidgets/QPushButton>

QT_BEGIN_NAMESPACE

class Ui_Dialog
{
public:
QPushButton *pushButton;
QPushButton *pushButton_2;
QLabel *label;
QLineEdit *lineEdit;
QLabel *label_2;

void setupUi(QDialog *Dialog)
{
if (Dialog->objectName().isEmpty())
Dialog->setObjectName(QStringLiteral("Dialog"));
Dialog->resize(400, 300);
pushButton = new QPushButton(Dialog);
pushButton->setObjectName(QStringLiteral("pushButton"));
pushButton->setGeometry(QRect(250, 70, 99, 27));
pushButton_2 = new QPushButton(Dialog);
pushButton_2->setObjectName(QStringLiteral("pushButton_2"));
pushButton_2->setGeometry(QRect(250, 170, 99, 27));
label = new QLabel(Dialog);
label->setObjectName(QStringLiteral("label"));
label->setGeometry(QRect(120, 30, 181, 17));
lineEdit = new QLineEdit(Dialog);
lineEdit->setObjectName(QStringLiteral("lineEdit"));
lineEdit->setGeometry(QRect(60, 170, 141, 27));
label_2 = new QLabel(Dialog);
label_2->setObjectName(QStringLiteral("label_2"));
label_2->setGeometry(QRect(50, 70, 181, 31));

retranslateUi(Dialog);

QMetaObject::connectSlotsByName(Dialog);
} // setupUi

void retranslateUi(QDialog *Dialog)
{
Dialog->setWindowTitle(QApplication::translate("Dialog", "Dialog", 0));
pushButton->setText(QApplication::translate("Dialog", "connect", 0));
pushButton_2->setText(QApplication::translate("Dialog", "send", 0));
label->setText(QApplication::translate("Dialog", "client", 0));
label_2->setText(QString());
} // retranslateUi

};

namespace Ui {
class Dialog: public Ui_Dialog {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_DIALOG_H