Qt实现网络数据传输（GET）

.pro文件
#-------------------------------------------------
#
# Project created by QtCreator 2016-12-08T11:39:04
#
#-------------------------------------------------
QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = TestQThttp
TEMPLATE = app
SOURCES += main.cpp\
        mainwindow.cpp
HEADERS  += mainwindow.h
FORMS    += mainwindow.ui
QT += network

HttpManager.h

#include <QtNetwork>

HttpManager.cpp

auto network_manager = new QNetworkAccessManager();

QNetworkRequest network_request;

//设置头信息

network_request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

//设置url

network_request.setUrl(QUrl("http://www.baidu.com"));

 

connect(network_manager, &QNetworkAccessManager::finished, this, &HttpManager::replyFinished);

//发送请求

network_manager->get(network_request);

void HttpManager::replyFinished(QNetworkReply* reply){

//获取响应的信息，状态码为200表示正常

QVariant status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);

//无错误返回

if(reply->error() == QNetworkReply::NoError)

{

    QByteArray bytes = reply->readAll();  //获取字节

    QString result(bytes);  //转化为字符串

    qDebug()<<result;

}

else

{

    //处理错误

}

 

//收到响应，因此需要处理

delete reply;

}