QT5.10控制台下利用QTcpSocket类局域网传送图片

局域网传送图片"/>

QT5.10控制台下利用QTcpSocket类局域网传送图片

与简单的传送一个包含字符串和int变量的结构对象不同，图片属于大文件，传送时会自动拆分为多个小包并一一传送，所以接收的时候需要多次接收并拼接。

客户端（发送）：

#include <iostream>#include <QApplication>#include <QPixmap>///QT Socket
#include <QTcpSocket>
#include <QHostAddress>#include <QBuffer>using namespace std;int main(int argc, char *argv[])
{QApplication a(argc, argv);QTcpSocket socket1;//开始连接服务端socket1.connectToHost(QHostAddress("192.168.100.101"),50002);//设置连接信息，并尝试连接qDebug() <<"正在连接服务器，最长5秒...";if (socket1.waitForConnected(5000))//连接等待，如果connectToHost连接成功，则立即返回true，否则到达最延迟后返回false{qDebug() << "已连接！";}else{qDebug() << "连接失败！";socket1.close();return a.exec();}QPixmap Pixmap("aaa.bmp");QBuffer buffer;Pixmap.save(&buffer,"bmp");quint32 pix_len = (quint32)buffer.data().size();qDebug() << "image size:" << pix_len;QByteArray dataArray;dataArray.append(buffer.data());quint32 write_len = socket1.write(dataArray);qDebug() << "write len:" << write_len;if(socket1.waitForBytesWritten(10000)){qDebug() << "data发送成功！";}else{qDebug() << "发送超时！";}socket1.close();return a.exec();
}

服务端（接收）：

#include <iostream>#include <QApplication>//QT Socket
#include <QTcpServer>
#include <QTcpSocket>
#include <QHostAddress>#include <QPixmap>
#include <QBuffer>using namespace std;int main(int argc, char *argv[])
{QApplication a(argc, argv);QTcpServer server;server.listen(QHostAddress::Any,50002);QTcpSocket * socket;qDebug() << "正在获取连接...最长100秒";if(server.waitForNewConnection(100000)){qDebug() << "连接成功！";socket = server.nextPendingConnection();}else{qDebug() << "等待连接超时！";server.close();return a.exec();}QByteArray array;if(socket->waitForReadyRead(100000))//等待直到有可读内容，最长100秒{while(socket->waitForReadyRead(100)){qDebug()<< "bytesAvailable";array.append((QByteArray)socket->readAll());//append()会拼接多个小包}}else{qDebug() << "读取等待超时！";server.close();return a.exec();}QPixmap pixmap;pixmap.loadFromData(array);//提取图片if(pixmap.save("ddd","bmp"))qDebug() << "保存图片成功！";cout << "end" << endl;server.close();return a.exec();
}