用qt c++写一个基于百度AI的代码

好的，以下是一个基于百度AI的文字识别功能的Qt C++代码示例：

#include <QCoreApplication>
#include <QDebug>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QUrl>
#include <QByteArray>
#include <QJsonDocument>
#include <QJsonObject>

QString baiduOCR(QString filePath, QString apiKey, QString secretKey)
{
    // Step 1: 读取图片
    QFile file(filePath);
    if (!file.open(QIODevice::ReadOnly)) {
        qDebug() << "Failed to open file: " << filePath;
        return "";
    }
    QByteArray imageData = file.readAll();
    file.close();

    // Step 2: 发送请求
    QNetworkAccessManager manager;
    QUrl url("https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic");
    url.addQueryItem("access_token", getAccessToken(apiKey, secretKey));

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

    QByteArray postData;
    postData.append("image=");
    postData.append(imageData.toBase64());
    QNetworkReply* reply = manager.post(request, postData);
    while (!reply->isFinished()) {
        qApp->processEvents();
    }

    // Step 3: 处理响应
    QByteArray responseData = reply->readAll();
    QJsonDocument jsonDoc = QJsonDocument::fromJson(responseData);
    QJsonObject jsonObj = jsonDoc.object();
    if (!jsonObj.contains("words_result")) {
        qDebug() << "Failed to get words result.";
        return "";
    }
    QJsonArray wordsArray = jsonObj.value("words_result").toArray();
    QString resultStr;
    foreach (const QJsonValue& value, wordsArray) {
        resultStr += value.toObject().value("words").toString();
        resultStr += "\n";
    }
    return resultStr;
}

QString getAccessToken(QString apiKey, QString secretKey)
{
    QNetworkAccessManager manager;
    QUrl url("https://aip.baidubce.com/oauth/2.0/token");
    url.addQueryItem("grant_type", "client_credentials");
    url.addQueryItem("client_id", apiKey);
    url.addQueryItem("client_secret", secretKey);

    QNetworkRequest request;
    request.setUrl(url);
    request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    QNetworkReply* reply = manager.get(request);
    while (!reply->isFinished()) {
        qApp->processEvents();
    }

    QByteArray responseData = reply->readAll();
    QJsonDocument jsonDoc = QJsonDocument::fromJson(responseData);
    QJsonObject jsonObj = jsonDoc.object();
    if (!jsonObj.contains("access_token")) {
        qDebug() << "Failed to get access token.";
        return "";
    }
    QString accessToken = jsonObj.value("access_token").toString();
    return accessToken;
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QString filePath = "test.png";
    QString apiKey = "your_api_key";
    QString secretKey = "your_secret_key";

    QString result = baiduOCR(filePath, apiKey, secretKey);
    qDebug() << result;

    return a.exec();
}

注意：在使用该代码前，需要在百度AI平台上注册并创建一个文字识别应用，获取相应的API Key和Secret Key。