QThttp程序

#ifndef WIDGET_H

#define WIDGET_H

#include <QWidget>

#include <QtNetwork>

#include <QNetworkAccessManager>

#include <QNetworkReply>

#include <QNetworkRequest>

QT_BEGIN_NAMESPACE

namespace Ui { class Widget; }

QT_END_NAMESPACE

class Widget : public QWidget

{

Q_OBJECT

public:

Widget(QWidget *parent = nullptr);

~Widget();

QNetworkAccessManager *manager;

private:

Ui::Widget *ui;

private slots:

void on_pushButton_clicked();

void GetFinished(QNetworkReply *reply);

};

#endif // WIDGET_H

---

#include "widget.h"

#include "ui_widget.h"

Widget::Widget(QWidget *parent)

: QWidget(parent)

, ui(new Ui::Widget)

{

ui->setupUi(this);

ui->lineEdit->setText("http://www.baidu.com/");

//建立新对象

manager = new QNetworkAccessManager(this);

//连接槽

connect(manager,&QNetworkAccessManager::finished,this,&Widget::GetFinished);

}

Widget::~Widget()

{

delete ui;

}

void Widget::on_pushButton_clicked()

{

QString url = ui->lineEdit->text();

manager->get(QNetworkRequest(QUrl(url)));

}

void Widget::GetFinished(QNetworkReply *reply)

{

//转换为utf-8编码，这样就可以显示中文了

QTextCodec *codec = QTextCodec::codecForName("utf8");

QString getData = codec->toUnicode(reply->readAll());

ui->textEdit->setText(getData);

}