在剛接觸QT時(shí)第一個(gè)任務(wù)就是進(jìn)行http請(qǐng)求，現(xiàn)在才開(kāi)始記錄，可能會(huì)有遺漏的點(diǎn)。

一、post請(qǐng)求

在.pro文件中

QT += network

在.h文件中添加對(duì)應(yīng)的頭文件

#include <QWidget>
#include <QObject>
#include <QDebug>
#include <QHttpMultiPart>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QMetaObject>
#include <QEventLoop>
#include <QJsonDocument>            //以下是json數(shù)據(jù)傳送所需頭文件
#include <QJsonParseError>
#include <QJsonObject>
#include <QJsonValue>
#include <QJsonArray>

在.cpp中

/*
    功能說(shuō)明：post請(qǐng)求
    參數(shù)說(shuō)明：key - 加密的密鑰
             data - 加密的參數(shù)
    返   回：無(wú)
*/
void GaodePost::PostRequest(QString key,QString data)
{
    QJsonObject dataobj;            //構(gòu)建json對(duì)象dataobj

    dataobj.insert("key",key);
    dataobj.insert("data",data);

    QJsonDocument document;
    document.setObject(dataobj);
    QByteArray byte_array = document.toJson(QJsonDocument::Compact);    //類型轉(zhuǎn)換

    //http請(qǐng)求
    QNetworkRequest request1;
    QNetworkAccessManager nam;
    connect(&nam, &QNetworkAccessManager::finished, this, &GaodePost::receiveGaodePostReply);

    request1.setUrl(QUrl("http://123.12.365.152/接口名"));    //要請(qǐng)求的網(wǎng)址
    
    //請(qǐng)求頭token設(shè)置
request1.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json;charset=utf-8"));
    QString token = "xxxxxxxxxxxxxxxxxxxxxxxx";
    QString token_headerData = token;
    request1.setRawHeader("token",token_headerData.toLocal8Bit());

    QNetworkReply* reply = nam.post(request1, byte_array);        //post請(qǐng)求頭+傳輸?shù)臄?shù)據(jù)

    //開(kāi)啟事件循環(huán)，直到請(qǐng)求完成
    QEventLoop loop;
    connect(reply,&QNetworkReply::finished,&loop,&QEventLoop::quit);
    loop.exec();

}

//接收請(qǐng)求返回的數(shù)據(jù)
QString GaodePost::receiveGaodePostReply(QNetworkReply *reply)
{
    QString res = reply->readAll();
    return res;
}

二、get請(qǐng)求

.pro和.h文件和post請(qǐng)求一樣，在.cpp中文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-509215.html

//get請(qǐng)求
void GaodeGet::GetRequest()
{
    QNetworkRequest request1;
    QNetworkAccessManager nam;
    connect(&nam, &QNetworkAccessManager::finished, this, &GaodeGet::receiveGaodeGetReply);

    //get與post的請(qǐng)求方式有所不同，get是在接口名后添加 ? 和傳輸?shù)臄?shù)據(jù)(type)
    request1.setUrl(QUrl("http://123.12.365.152/接口名?type"));
    request1.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json;charset=utf-8"));
    QString token = "xxxxxxxxxxxxxxxxxxxxxxxx";
    QString token_headerData = token;
    request1.setRawHeader("token",token_headerData.toLocal8Bit());
    QNetworkReply *reply = nam.get(request1);    //get請(qǐng)求頭

    //開(kāi)啟事件循環(huán)，直到請(qǐng)求完成
    QEventLoop loop;
    connect(reply,&QNetworkReply::finished,&loop,&QEventLoop::quit);
    loop.exec();
}

//接收get請(qǐng)求返回的數(shù)據(jù)
void GaodeGet::receiveGaodeGetReply(QNetworkReply *reply)
{
    QString res = reply->readAll();
    qDebug() << "GaoDeWidget::receiveReply_get recive:" << res;
}

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