QT POST/GET 发送/获取网页数据

#include 
#include 

QNetworkAccessManager *m_accessManager;

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Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    m_accessManager = new QNetworkAccessManager(this);
    QObject::connect(m_accessManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finishedSlot(QNetworkReply*)));
}

Widget::~Widget()
{
    delete ui;
    delete m_accessManager;
}

void Widget::finishedSlot(QNetworkReply *reply)
{
     if (reply->error() == QNetworkReply::NoError)
     {
         QByteArray bytes = reply->readAll();
         qDebug()<QString string = QString::fromUtf8(bytes);

         ui->textBrowser->setText(string.toUtf8());
     }
     else
     {
         qDebug()<<"handle errors here";
         QVariant statusCodeV = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
         //statusCodeV是HTTP服务器的相应码，reply->error()是Qt定义的错误码，可以参考QT的文档
         qDebug( "found error ....code: %d %d\n", statusCodeV.toInt(), (int)reply->error());
         qDebug(qPrintable(reply->errorString()));
     }
     reply->deleteLater();
}

void Widget::on_pushButton_clicked()
{
//POST
    QNetworkRequest request;

    request.setUrl(QUrl("http://localhost:8888/login"));
//    request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");
//    request.setRawHeader("Accept","text/html, application/xhtml+xml, */*");
//    request.setRawHeader("Referer","http://localhost:8888/login");
//    request.setRawHeader("Accept-Language","zh-CN");
//    request.setRawHeader("X-Requested-With","XMLHttpRequest");
//    request.setRawHeader("User-Agent","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");
//    request.setRawHeader("Content-Type","application/x-www-form-urlencoded");
//    request.setRawHeader("Accept-Encoding","gzip,deflate");
//    request.setRawHeader("Host","localhost:8888");
//    request.setRawHeader("Content-Length","18");
//    request.setRawHeader("Connection","Keep-Alive");
//    request.setRawHeader("Cache-Control","no-cache");

    QByteArray postData;
    postData.append("myname=lk&mypwd=33");

    QNetworkReply* reply = m_accessManager->post(request,postData);
}

void Widget::on_pushButton_get_clicked()
{
//GET

//    QUrl url("https://kyfw.12306.cn/otn/resources/js/framework/station_name.js");
//    QUrl url("http://localhost:8888/login");
//    QUrl url("http://dict.baidu.com/s?wd=name");

    QNetworkRequest request;
    request.setUrl(QUrl("http://dict.baidu.com/s?wd=name"));

    m_accessManager->get(request);
}