#include <QNetworkReply>#include <QNetworkRequest>QNetworkAccessManager *m_accessManager;

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;}void Widget::finishedSlot(QNetworkReply *reply){     if (reply->error() == QNetworkReply::NoError)     {         QByteArray bytes = reply->readAll();         qDebug()<<bytes;         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 = new QNetworkRequest();    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 = new QNetworkRequest();    request->setUrl(QUrl("http://dict.baidu.com/s?wd=name"));    m_accessManager->get(*request);}