下面是使用Qt的QNetworkAccessManager类实现文件上传到FTP服务器并在目标路径创建该文件的示例代码：
#include <QCoreApplication>#include <QFile>#include <QUrl>#include <QNetworkAccessManager>#include <QNetworkRequest>#include <QNetworkReply>int main(int argc, char *argv[]){QCoreApplication a(argc, argv);// FTP服务器信息QString ftpUrl = "ftp://example.com/";QString username = "ftp_username";QString password = "ftp_password";// 本地待上传的文件路径QString localFilePath = "path/to/local/file.txt";// 获取本地文件名和远程目标路径QFileInfo fileInfo(localFilePath);QString fileName = fileInfo.fileName();QString remotePath = "/remote/path/" + fileName;// 打开本地文件QFile file(localFilePath);if (!file.open(QIODevice::ReadOnly))return -1;// 创建网络访问管理器对象和请求对象QNetworkAccessManager manager;QUrl url(ftpUrl + remotePath);// 设置用户名和密码凭据url.setUserName(username);url.setPassword(password);QNetworkRequest request(url);QObject::connect(&manager, &QNetworkAccessManager::finished,[&](QNetworkReply *reply) {if (reply->error() == QNetworkReply::NoError) {qDebug() << "File uploaded successfully!";} else {qDebug() << "Upload failed:" << reply->errorString();}reply->deleteLater();});auto reply = manager.put(request, &file);QObject::connect(reply, &QNetworkReply::uploadProgress,[&](qint64 bytesSent, qint64 bytesTotal) {qDebug() << "Upload progress:" << bytesSent << "/" << bytesTotal;});return a.exec();}
请注意，你需要将 ftp://example.com/ 替换为你的FTP服务器地址，以及 ftp_username 和 ftp_password 替换为你的FTP用户名和密码。另外，确保目标路径正确，并有相应的写入权限。
该代码通过QNetworkAccessManager发送PUT请求将本地文件上传到指定的FTP服务器上。上传过程中会显示上传进度信息。成功上传时输出 “File uploaded successfully!“，失败时输出错误信息。
这只是一个简单示例，请根据实际情况进行修改和完善。
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