#include "mainwindow.h" #include "ui_mainwindow.h" #include <QFtp> #include <QDebug> #include <QFile> #include <QDataStream> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); QFtp *ftp = new QFtp(this); ftp->connectToHost("192.168.1.99", 21); ftp->login(); ftp->cd("/mtp/blk/"); //将"0x10"以二进制的方式写到"ftp://192.168.1.99/mtp/blk/2.txt"中 int a = 0x10; uchar *p = (uchar *)&a; uchar bf[10]; bf[0] = p[0]; bf[1] = p[1]; bf[2] = p[2]; bf[3] = p[3]; bf[4] = '\0'; qDebug() << p[0] << p[1] << p[2] << p[3]; ftp->put((const char*)bf, "2.txt"); //将服务器上的文件下载到本地 QFile *file; file = new QFile("2.txt"); if(!file->open(QIODevice::WriteOnly)) qDebug() << "服务器上的文件打开失败"; ftp->get("2.txt", file); file->close(); //下载到本地后打开，读出数据 if(!file->open(QIODevice::ReadOnly)) qDebug() << "本地文件打开失败"; char bf1[10]; QDataStream in(&file); in.readRawData((char *)&bf, 4); file->close(); int aa; memcpy(&a, bf1, 4); qDebug() << aa; ftp->close(); } MainWindow::~MainWindow() { delete ui; }
运行结果：
16 0 0 0
16