#include <QNetworkAccessManager>//包含QNetworkAccessManager类
#include <QNetworkRequest>//包含QNetworkRequest类
#include <QNetworkReply>//包含QNetworkReply类
#include <QtCore>
#include <iostream>
using namespace std ;
class TT : public QObject
{
    Q_OBJECT//宏
public:
    static QString getHtml(QString url)
    {
        QNetworkAccessManager *manager = new QNetworkAccessManager();//实例化类
        QNetworkReply *reply = manager->get(QNetworkRequest(QUrl(url)));//实例化类
        QByteArray responseData;//定义数据
        QEventLoop eventLoop;
        connect(manager, SIGNAL(finished(QNetworkReply*)), &eventLoop, SLOT(quit()));//信号槽
        eventLoop.exec();       //block until finish
        responseData = reply->readAll();//读取返回数据
        return QString(responseData);//返回数据
    }
};
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QString data = TT::getHtml(QString("http://www.baidu.com") );//打开百度
    cout<<data.toStdString()<<endl;//输出百度返回的内容
    return a.exec();
}