{"id":33181,"date":"2025-04-27T01:05:35","date_gmt":"2025-04-26T17:05:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/33181.html"},"modified":"2025-04-27T01:05:35","modified_gmt":"2025-04-26T17:05:35","slug":"%e3%80%90qt%e7%bd%91%e7%bb%9c%e3%80%91%e6%9e%84%e5%bb%ba%e7%ae%80%e5%8d%95udp%e5%9b%9e%e6%98%be%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/33181.html","title":{"rendered":"\u3010QT\u7f51\u7edc\u3011\u6784\u5efa\u7b80\u5355Udp\u56de\u663e\u670d\u52a1\u5668"},"content":{"rendered":"<p>&#x1f4e2;\u535a\u5ba2\u4e3b\u9875&#xff1a;https:\/\/blog.csdn.net\/2301_779549673 &#x1f4e2;\u535a\u5ba2\u4ed3\u5e93&#xff1a;https:\/\/gitee.com\/JohnKingW\/linux_test\/tree\/master\/lesson &#x1f4e2;\u6b22\u8fce\u70b9\u8d5e &#x1f44d; \u6536\u85cf \u2b50\u7559\u8a00 &#x1f4dd; \u5982\u6709\u9519\u8bef\u656c\u8bf7\u6307\u6b63&#xff01; &#x1f4e2;\u672c\u6587\u7531 JohnKi \u539f\u521b&#xff0c;\u9996\u53d1\u4e8e CSDN&#x1f649; &#x1f4e2;\u672a\u6765\u5f88\u957f&#xff0c;\u503c\u5f97\u6211\u4eec\u5168\u529b\u5954\u8d74\u66f4\u7f8e\u597d\u7684\u751f\u6d3b\u2728<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170528-680d12586aa7c.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170528-680d12588fd78.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>&#x1f3f3;\ufe0f\u200d&#x1f308;\u4e00\u3001\u6838\u5fc3API\u6982\u89c8<\/li>\n<li>\n<ul>\n<li>1.1 QUdpSocket<\/li>\n<li>1.2 QNetworkDatagram<\/li>\n<li>1.3 Qt\u7f51\u7edc\u6ce8\u610f\u70b9<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f3f3;\ufe0f\u200d&#x1f308;\u4e8c\u3001UdpServer \u670d\u52a1\u7aef<\/li>\n<li>\n<ul>\n<li>2.1 \u754c\u9762\u5e03\u5c40<\/li>\n<li>2.2 QUdpSocket \u6210\u5458<\/li>\n<li>2.3 processRequest \u5904\u7406\u4fe1\u53f7\u69fd<\/li>\n<li>2.4 process \u5177\u4f53\u5904\u7406\u8fc7\u7a0b<\/li>\n<li>2.5 \u6574\u4f53\u4ee3\u7801<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f3f3;\ufe0f\u200d&#x1f308;\u4e09\u3001UdpClient \u5ba2\u6237\u7aef<\/li>\n<li>\n<ul>\n<li>3.1 \u754c\u9762\u5e03\u5c40<\/li>\n<li>3.2 \u5168\u5c40\u53d8\u91cf<\/li>\n<li>3.3 QUdpClient \u6210\u5458<\/li>\n<li>3.3 on_pushButton_clicked \u53d1\u9001\u4fe1\u53f7\u69fd<\/li>\n<li>3.4 processResponse \u54cd\u5e94\u62a5\u6587\u5904\u7406\u69fd<\/li>\n<li>3.5 \u6574\u4f53\u4ee3\u7801<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f3f3;\ufe0f\u200d&#x1f308;\u56db\u3001\u6d4b\u8bd5<\/li>\n<li>&#x1f465;\u603b\u7ed3<\/li>\n<\/ul>\n<hr \/>\n<h2>&#x1f3f3;\ufe0f\u200d&#x1f308;\u4e00\u3001\u6838\u5fc3API\u6982\u89c8<\/h2>\n<p>\u4e3b\u8981\u7684\u7c7b\u6709\u4e24\u4e2a.QUdpSocket \u548c QNetworkDatagram<\/p>\n<h3>1.1 QUdpSocket<\/h3>\n<p>QUdpSocket <font color=\"#7E84F7\">\u8868\u793a\u4e00\u4e2a UDP \u7684 socket \u6587\u4ef6<\/font><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170528-680d1258b6b47.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>1.2 QNetworkDatagram<\/h3>\n<p>QNetworkDatagram <font color=\"#7E84F7\">\u8868\u793a\u4e00\u4e2a UDP \u7684\u6570\u636e\u5305<\/font> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170529-680d125917354.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>1.3 Qt\u7f51\u7edc\u6ce8\u610f\u70b9<\/h3>\n<p><font color=\"#EB3324\">\u5728\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b\u4e4b\u524d,\u9700\u8981\u5728\u9879\u76ee\u4e2d\u7684.pro \u6587\u4ef6\u4e2d\u6dfb\u52a0 network \u6a21\u5757<\/font> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170529-680d12596efbc.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>&#x1f3f3;\ufe0f\u200d&#x1f308;\u4e8c\u3001UdpServer \u670d\u52a1\u7aef<\/h2>\n<h3>2.1 \u754c\u9762\u5e03\u5c40<\/h3>\n<p>\u521b\u5efa\u754c\u9762,\u5305\u542b\u4e00\u4e2aQListwidget \u7528\u6765\u663e\u793a\u6d88\u606f\u3002<font color=\"#F09B59\">\u4e0d\u9700\u8981\u600e\u4e48\u8c03&#xff0c;\u53ea\u9700\u8981\u6709\u4e00\u4e2a\u80fd\u591f\u56de\u663e\u51fa\u5ba2\u6237\u7aef\u6570\u636e\u7684\u754c\u9762\u5c31\u884c<\/font><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170530-680d125a36eb2.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.2 QUdpSocket \u6210\u5458<\/h3>\n<p>\u5148\u9700\u8981<font color=\"#7E84F7\">\u5728\u5934\u6587\u4ef6\u4e2d\u6dfb\u52a0\u76f8\u5e94\u5e93\u548c\u6210\u5458<\/font><\/p>\n<p>widget.h<\/p>\n<p>#ifndef WIDGET_H<br \/>\n#define WIDGET_H<\/p>\n<p>#include &lt;QWidget&gt;<br \/>\n#include &lt;QUdpSocket&gt;   \/\/ \u9700\u8981\u5f15\u5165network<\/p>\n<p>QT_BEGIN_NAMESPACE<br \/>\nnamespace Ui { class Widget; }<br \/>\nQT_END_NAMESPACE<\/p>\n<p>class Widget : public QWidget<br \/>\n{<br \/>\n    Q_OBJECT<\/p>\n<p>public:<br \/>\n    Widget(QWidget *parent &#061; nullptr);<br \/>\n    ~Widget();<\/p>\n<p>private:<br \/>\n    Ui::Widget *ui;<\/p>\n<p>    QUdpSocket* socket;\/\/<br \/>\n};<br \/>\n#endif \/\/ WIDGET_H<\/p>\n<p><font color=\"#8F5019\">\u7136\u540e\u6211\u4eec\u9700\u8981\u5728\u4e3b\u51fd\u6570\u4e2d\u521b\u5efa\u76f8\u5e94\u7684\u5bf9\u8c61<\/font><\/p>\n<p>socket &#061; new QUdpSocket(this);<\/p>\n<p>\u8fd9\u91cc\u4e0d\u5f97\u4e0d\u63d0\u9192\u4e00\u4e0b&#xff0c;new\u7684\u65f6\u5019\u9644\u5e26\u4e0athis&#xff0c;\u8fd9\u6837\u5c31\u4f1a\u5c06widget\u4f5c\u4e3a\u57fa\u7c7b&#xff0c;\u7b49widget\u88ab\u9500\u6bc1\u7684\u65f6\u5019&#xff0c;\u4e5f\u4f1a\u8ddf\u7740\u9500\u6bc1\u3002<font color=\"#F09B59\">\u4e0d\u7136\u5c31\u9700\u8981\u5728widget\u7684\u6790\u6784\u51fd\u6570\u4e2d\u5e26\u4e0a delete socket<\/font><\/p>\n<p>Udp\u670d\u52a1\u7aef\u7684\u987a\u5e8f<\/p>\n<li>\u5c06\u670d\u52a1\u7aef\u5957\u63a5\u5b57\u8fde\u63a5\u5230\u76f8\u5e94\u7684\u5904\u7406\u4fe1\u53f7\u69fd\u4e0a<\/li>\n<li>\u7ed1\u5b9a\u5957\u63a5\u5b57\u5230\u6307\u5b9a\u7aef\u53e3\u4e0a&#xff0c;\u5f00\u59cb\u76d1\u542c\u6307\u5b9a\u7684ip<\/li>\n<p><font color=\"#EB3324\">\u5982\u679c\u987a\u5e8f\u53cd\u8fc7\u6765,\u53ef\u80fd\u4f1a\u51fa\u73b0\u7aef\u53e3\u7ed1\u5b9a\u597d\u4e86\u4e4b\u540e,\u8bf7\u6c42\u5c31\u8fc7\u6765\u4e86.\u6b64\u65f6\u8fd8\u6ca1\u6765\u5f97\u53ca\u8fde\u63a5\u4fe1\u53f7\u69fd,\u90a3\u4e48\u8fd9\u4e2a\u8bf7\u6c42\u5c31\u6709\u53ef\u80fd\u9519\u8fc7\u4e86<\/font><\/p>\n<p>Widget::Widget(QWidget *parent)<br \/>\n    : QWidget(parent)<br \/>\n    , ui(new Ui::Widget)<br \/>\n{<br \/>\n    ui-&gt;setupUi(this);<\/p>\n<p>    \/\/ \u521b\u5efa\u51fa\u8fd9\u4e2a\u5bf9\u8c61<br \/>\n        \/\/ socket &#061; new QUdpSocket(this); \u8868\u793a socket \u7684\u7236\u5bf9\u8c61\u662f\u5f53\u524d Widget \u5bf9\u8c61\u3002\u5f53 Widget \u6790\u6784\u65f6&#xff0c;\u4f1a\u89e6\u53d1 socket \u7684\u81ea\u52a8\u9500\u6bc1&#xff0c;\u65e0\u9700\u624b\u52a8 delete\u3002<br \/>\n        \/\/ \u5982\u679c\u6539\u4e3a socket &#061; new QUdpSocket;&#xff08;\u65e0\u7236\u5bf9\u8c61&#xff09;&#xff0c;\u5219 socket \u7684\u751f\u547d\u5468\u671f\u4e0d\u518d\u7531 Widget \u7ba1\u7406\u3002\u6b64\u65f6\u5fc5\u987b\u624b\u52a8\u8c03\u7528 delete socket;&#xff0c;\u5426\u5219 socket \u5bf9\u8c61\u4f1a\u4e00\u76f4\u5b58\u5728&#xff0c;\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<br \/>\n    socket &#061; new QUdpSocket(this);<\/p>\n<p>    \/\/ \u8bbe\u7f6e\u7a97\u53e3\u6807\u9898<br \/>\n    this-&gt;setWindowTitle(&#034;\u670d\u52a1\u5668&#034;);<\/p>\n<p>    \/\/ \u8fde\u63a5\u4fe1\u53f7\u69fd<br \/>\n    connect(socket, &amp;QUdpSocket::readyRead, this, &amp;Widget::processRequest);<\/p>\n<p>    \/\/ \u7ed1\u5b9a\u7aef\u53e3\u53f7<br \/>\n    bool ret &#061; socket-&gt;bind(QHostAddress::Any, 9090);<br \/>\n    if(!ret){<br \/>\n        \/\/ \u7ed1\u5b9a\u5931\u8d25&#xff01;<br \/>\n        QMessageBox::critical(this, &#034;\u670d\u52a1\u5668\u7ed1\u5b9a\u7aef\u53e3\u53f7\u5931\u8d25&#034;, socket-&gt;errorString());<br \/>\n        return;<br \/>\n    }<br \/>\n}<\/p>\n<p>Widget::~Widget()<br \/>\n{<br \/>\n    delete ui;<br \/>\n}<\/p>\n<p>\u8fd9\u90e8\u5206\u4e0elinux\u7f51\u7edc\u662f\u4e00\u6837\u7684&#xff0c;<font color=\"#7E84F7\">linux\u4e2d\u8981\u4e48\u9009\u62e9\u5728\u6784\u9020\u51fd\u6570\u4e2d\u5c06\u6307\u5b9a\u7684\u65b9\u6cd5\u56de\u8c03\u51fd\u6570\u4f20\u8fdb\u53bb&#xff0c;\u8981\u4e48\u9009\u62e9\u4f7f\u7528udpserver\u5bf9\u8c61\u7684\u51fd\u6570\u65b9\u6cd5&#xff0c;\u8bbe\u7f6e\u65b9\u6cd5\u56de\u8c03\u51fd\u6570\u3002<\/font><font color=\"#8F5019\">\u603b\u800c\u8a00\u4e4b&#xff0c;\u90fd\u662f\u5148\u786e\u5b9a\u597d\u65b9\u6cd5\u56de\u8c03\u51fd\u6570&#xff0c;\u518d\u53bb\u4ece\u5916\u9762\u4e0d\u65ad\u6536\u53d6\u8fde\u63a5<\/font><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170530-680d125a7b75e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.3 processRequest \u5904\u7406\u4fe1\u53f7\u69fd<\/h3>\n<p>\u5b8c\u6210\u5904\u7406\u8bf7\u6c42\u7684\u8fc7\u7a0b<\/p>\n<li>\u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790<\/li>\n<li>\u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94<\/li>\n<li>\u628a\u54cd\u5e94\u5199\u56de\u5230\u5ba2\u6237\u7aef<\/li>\n<p>\/\/ \u8fd9\u4e2a\u51fd\u6570\u5b8c\u6210\u7684\u903b\u8f91&#xff0c;\u5c31\u662f\u670d\u52a1\u5668\u7684\u6700\u6838\u5fc3\u903b\u8f91\u4e86<br \/>\nvoid Widget::processRequest()<br \/>\n{<br \/>\n    \/\/ 1. \u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790<br \/>\n    const QNetworkDatagram&amp; requestDatagram &#061; socket-&gt;receiveDatagram();<br \/>\n    QString request &#061; requestDatagram.data();<br \/>\n    \/\/ 2. \u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u76f8\u5e94&#xff08;\u7531\u4e8e\u662f\u56de\u663e\u670d\u52a1\u5668&#xff0c;\u76f8\u5e94\u4e0d\u9700\u8981\u8ba1\u7b97&#xff0c;\u5c31\u662f\u8bf7\u6c42\u672c\u8eab&#xff09;<br \/>\n    const QString&amp; response &#061; process(request);<br \/>\n    \/\/ 3. \u628a\u76f8\u5e94\u5199\u56de\u5ba2\u6237\u7aef<br \/>\n    QNetworkDatagram responseDatagram(response.toUtf8(), requestDatagram.senderAddress(), requestDatagram.senderPort());<br \/>\n    socket-&gt;writeDatagram(responseDatagram);<br \/>\n    \/\/ \u628a\u8fd9\u6b21\u4ea4\u4e92\u7684\u4fe1\u606f&#xff0c;\u663e\u793a\u5230\u754c\u9762\u4e0a<br \/>\n    QString log &#061; &#034;[&#034; &#043; requestDatagram.senderAddress().toString() &#043; &#034;:&#034; &#043; QString::number(requestDatagram.senderPort())<br \/>\n                  &#043; &#034;] req: &#034; &#043; request &#043; &#034;, resp: &#034; &#043; response;<br \/>\n    ui-&gt;listWidget-&gt;addItem(log);<br \/>\n}<\/p>\n<h3>2.4 process \u5177\u4f53\u5904\u7406\u8fc7\u7a0b<\/h3>\n<p>\u7531\u4e8e\u6211\u4eec\u6b64\u5904\u662f\u5b9e\u73b0\u56de\u663e\u670d\u52a1\u5668.\u6240\u4ee5 process \u65b9\u6cd5\u4e2d\u5e76\u6ca1\u6709\u5305\u542b\u5b9e\u8d28\u6027\u7684\u5185\u5bb9<\/p>\n<p><font color=\"#7E84F7\">&#034;\u6839\u636e\u8bf7\u6c42\u5904\u7406\u54cd\u5e94&#034;\u662f\u670d\u52a1\u5668\u5f00\u53d1\u4e2d\u7684\u6700\u6838\u5fc3\u7684\u6b65\u9aa4\u4e00\u4e2a\u5546\u4e1a\u670d\u52a1\u5668\u7a0b\u5e8f,\u8fd9\u91cc\u7684\u903b\u8f91\u53ef\u80fd\u662f\u51e0\u4e07\u884c\u51e0\u5341\u4e07\u884c\u4ee3\u7801\u91cf\u7ea7\u7684<\/font><\/p>\n<p>QString Widget::process(const QString &amp;request)<br \/>\n{<br \/>\n    \/\/ \u7531\u4e8e\u5f53\u524d\u662f\u4f1a\u5148\u670d\u52a1\u5668&#xff0c;\u76f8\u5e94\u5c31\u662f\u548c\u8bf7\u6c42\u5b8c\u5168\u4e00\u6837\u7684<br \/>\n    return request;<br \/>\n}<\/p>\n<h3>2.5 \u6574\u4f53\u4ee3\u7801<\/h3>\n<p><font color=\"#EB3324\">\u8bb0\u5f97\u4e0d\u8981\u5fd8\u8bb0\u5728\u5934\u6587\u4ef6\u4e2d\u6dfb\u52a0\u76f8\u5e94\u7684\u69fd\u51fd\u6570\u58f0\u660e<\/font><\/p>\n<p>#include &#034;widget.h&#034;<br \/>\n#include &#034;ui_widget.h&#034;<br \/>\n#include &lt;QMessageBox&gt;<br \/>\n#include &lt;QNetworkDatagram&gt;<\/p>\n<p>Widget::Widget(QWidget *parent)<br \/>\n    : QWidget(parent)<br \/>\n    , ui(new Ui::Widget)<br \/>\n{<br \/>\n    ui-&gt;setupUi(this);<\/p>\n<p>    \/\/ \u521b\u5efa\u51fa\u8fd9\u4e2a\u5bf9\u8c61<br \/>\n        \/\/ socket &#061; new QUdpSocket(this); \u8868\u793a socket \u7684\u7236\u5bf9\u8c61\u662f\u5f53\u524d Widget \u5bf9\u8c61\u3002\u5f53 Widget \u6790\u6784\u65f6&#xff0c;\u4f1a\u89e6\u53d1 socket \u7684\u81ea\u52a8\u9500\u6bc1&#xff0c;\u65e0\u9700\u624b\u52a8 delete\u3002<br \/>\n        \/\/ \u5982\u679c\u6539\u4e3a socket &#061; new QUdpSocket;&#xff08;\u65e0\u7236\u5bf9\u8c61&#xff09;&#xff0c;\u5219 socket \u7684\u751f\u547d\u5468\u671f\u4e0d\u518d\u7531 Widget \u7ba1\u7406\u3002\u6b64\u65f6\u5fc5\u987b\u624b\u52a8\u8c03\u7528 delete socket;&#xff0c;\u5426\u5219 socket \u5bf9\u8c61\u4f1a\u4e00\u76f4\u5b58\u5728&#xff0c;\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<br \/>\n    socket &#061; new QUdpSocket(this);<\/p>\n<p>    \/\/ \u8bbe\u7f6e\u7a97\u53e3\u6807\u9898<br \/>\n    this-&gt;setWindowTitle(&#034;\u670d\u52a1\u5668&#034;);<\/p>\n<p>    \/\/ \u8fde\u63a5\u4fe1\u53f7\u69fd<br \/>\n    connect(socket, &amp;QUdpSocket::readyRead, this, &amp;Widget::processRequest);<\/p>\n<p>    \/\/ \u7ed1\u5b9a\u7aef\u53e3\u53f7<br \/>\n    bool ret &#061; socket-&gt;bind(QHostAddress::Any, 9090);<br \/>\n    if(!ret){<br \/>\n        \/\/ \u7ed1\u5b9a\u5931\u8d25&#xff01;<br \/>\n        QMessageBox::critical(this, &#034;\u670d\u52a1\u5668\u7ed1\u5b9a\u7aef\u53e3\u53f7\u5931\u8d25&#034;, socket-&gt;errorString());<br \/>\n        return;<br \/>\n    }<br \/>\n}<\/p>\n<p>Widget::~Widget()<br \/>\n{<br \/>\n    delete ui;<br \/>\n}<\/p>\n<p>\/\/ \u8fd9\u4e2a\u51fd\u6570\u5b8c\u6210\u7684\u903b\u8f91&#xff0c;\u5c31\u662f\u670d\u52a1\u5668\u7684\u6700\u6838\u5fc3\u903b\u8f91\u4e86<br \/>\nvoid Widget::processRequest()<br \/>\n{<br \/>\n    \/\/ 1. \u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790<br \/>\n    const QNetworkDatagram&amp; requestDatagram &#061; socket-&gt;receiveDatagram();<br \/>\n    QString request &#061; requestDatagram.data();<br \/>\n    \/\/ 2. \u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u76f8\u5e94&#xff08;\u7531\u4e8e\u662f\u56de\u663e\u670d\u52a1\u5668&#xff0c;\u76f8\u5e94\u4e0d\u9700\u8981\u8ba1\u7b97&#xff0c;\u5c31\u662f\u8bf7\u6c42\u672c\u8eab&#xff09;<br \/>\n    const QString&amp; response &#061; process(request);<br \/>\n    \/\/ 3. \u628a\u54cd\u5e94\u5199\u56de\u5ba2\u6237\u7aef<br \/>\n    QNetworkDatagram responseDatagram(response.toUtf8(), requestDatagram.senderAddress(), requestDatagram.senderPort());<br \/>\n    socket-&gt;writeDatagram(responseDatagram);<br \/>\n    \/\/ 4. \u628a\u8fd9\u6b21\u4ea4\u4e92\u7684\u4fe1\u606f&#xff0c;\u663e\u793a\u5230\u754c\u9762\u4e0a<br \/>\n    QString log &#061; &#034;[&#034; &#043; requestDatagram.senderAddress().toString() &#043; &#034;:&#034; &#043; QString::number(requestDatagram.senderPort())<br \/>\n                  &#043; &#034;] req: &#034; &#043; request &#043; &#034;, resp: &#034; &#043; response;<br \/>\n    ui-&gt;listWidget-&gt;addItem(log);<br \/>\n}<\/p>\n<p>QString Widget::process(const QString &amp;request)<br \/>\n{<br \/>\n    \/\/ \u7531\u4e8e\u5f53\u524d\u662f\u4f1a\u5148\u670d\u52a1\u5668&#xff0c;\u76f8\u5e94\u5c31\u662f\u548c\u8bf7\u6c42\u5b8c\u5168\u4e00\u6837\u7684<br \/>\n    return request;<br \/>\n}<\/p>\n<h2>&#x1f3f3;\ufe0f\u200d&#x1f308;\u4e09\u3001UdpClient \u5ba2\u6237\u7aef<\/h2>\n<h3>3.1 \u754c\u9762\u5e03\u5c40<\/h3>\n<p>\u521b\u5efa\u754c\u9762&#xff1a;\u5305\u542b3\u4e2a QLineEdit&#xff0c;QPushButton&#xff0c;QListwidget<\/p>\n<ul>\n<li>\u5148\u4f7f\u7528\u6c34\u5e73\u5e03\u5c40\u628a QLineEdit \u548c QPushButton \u653e\u597d&#xff0c;<font color=\"#7E84F7\">\u5e76\u8bbe\u7f6e\u8fd9\u4e24\u4e2a\u63a7\u4ef6\u7684\u5782\u76f4\u65b9\u5411\u7684sizePolicy \u4e3aExpanding<\/font><\/li>\n<li>\u518d\u4f7f\u7528\u5782\u76f4\u5e03\u5c40\u628a QListwidget \u548c\u4e0a\u9762\u7684\u6c34\u5e73\u5e03\u5c40\u653e\u597d<\/li>\n<li>\u8bbe\u7f6e\u5782\u76f4\u5e03\u5c40\u7684 layoutStretch\u4e3a5&#xff0c;1(\u5f53\u7136\u8fd9\u4e2a\u5c3a\u5bf8\u6bd4\u4f8b\u6839\u636e\u4e2a\u4eba\u559c\u597d\u5fae\u8c03)<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170530-680d125adcd6c.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170531-680d125b2f331.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>3.2 \u5168\u5c40\u53d8\u91cf<\/h3>\n<p><font color=\"#7E84F7\">\u5728 widget.cpp \u4e2d,\u5148\u521b\u5efa\u4e24\u4e2a\u5168\u5c40\u5e38\u91cf,\u8868\u793a\u670d\u52a1\u5668\u7684 IP \u548c \u7aef\u53e3<\/font><\/p>\n<p>\/\/ \u5b9a\u4e49\u4e24\u4e2a\u5e38\u91cf&#xff0c;\u63cf\u8ff0\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3<br \/>\nconst QString&amp; SERVER_IP &#061; &#034;127.0.0.1&#034;;<br \/>\nconst quint16 SERVER_PORT &#061; 9090;<\/p>\n<h3>3.3 QUdpClient \u6210\u5458<\/h3>\n<p>\u8fd9\u4e2a\u90e8\u5206\u76f8\u5bf9\u670d\u52a1\u7aef\u7b80\u5355\u4e00\u4e9b\u3002<\/p>\n<ul>\n<li>\u670d\u52a1\u7aef \u9700\u8981<font color=\"#F09B59\">\u5148\u8fde\u63a5\u5904\u7406\u4fe1\u53f7\u69fd<\/font> &#xff0c;<font color=\"#7E84F7\">\u518d\u7ed1\u5b9a\u7aef\u53e3\u53f7\u548c\u6307\u5b9aip<\/font><\/li>\n<li>\u5ba2\u6237\u7aef \u53ea\u9700\u8981<font color=\"#7E84F7\">\u5efa\u7acb\u597d\u4e0e\u5bf9 \u670d\u52a1\u7aef\u54cd\u5e94\u5185\u5bb9 \u4e0e \u76f8\u5e94\u7684\u5904\u7406\u51fd\u6570 \u7684\u8fde\u63a5\u5c31\u884c\u4e86<\/font><\/li>\n<\/ul>\n<p>Widget::Widget(QWidget *parent)<br \/>\n    : QWidget(parent)<br \/>\n    , ui(new Ui::Widget)<br \/>\n{<br \/>\n    ui-&gt;setupUi(this);<\/p>\n<p>    socket &#061; new QUdpSocket(this);<\/p>\n<p>    \/\/ \u4fee\u6539\u7a97\u53e3\u6807\u9898<br \/>\n    this-&gt;setWindowTitle(&#034;\u5ba2\u6237\u7aef&#034;);<\/p>\n<p>    \/\/ \u8fde\u63a5\u670d\u52a1\u7aef\u76f8\u5e94\u5185\u5bb9 \u548c \u5bf9\u5e94\u5904\u7406\u51fd\u6570<br \/>\n    connect(socket, &amp;QUdpSocket::readyRead, this, &amp;Widget::processResponse);<br \/>\n}<\/p>\n<p>Widget::~Widget()<br \/>\n{<br \/>\n    delete ui;<br \/>\n}<\/p>\n<h3>3.3 on_pushButton_clicked \u53d1\u9001\u4fe1\u53f7\u69fd<\/h3>\n<p>\u5728\u8fd9\u91cc&#xff0c;\u6211\u4eec\u7684\u9700\u8981\u5b9e\u73b0\u7684\u529f\u80fd\u53ea\u662f \u56de\u663e &#xff0c;\u6240\u4ee5\u53ea\u9700\u8981&#xff0c;<font color=\"#7E84F7\">\u5c06 lineedit \u4e2d\u7684\u5185\u5bb9&#xff0c;\u5e8f\u5217\u5316&#xff0c;\u4e0e\u76ee\u6807\u670d\u52a1\u7aef\u7684ip\u3001\u7aef\u53e3\u53f7\u7ed1\u5b9a\u8d77\u6765\u3002<\/font><font color=\"#8F5019\">\u7136\u540e\u5c06\u4e00\u6574\u4e2a\u8bf7\u6c42\u4f7f\u7528 writeDatagram \u53d1\u9001\u51fa\u53bb<\/font><\/p>\n<p>void Widget::on_pushButton_clicked()<br \/>\n{<br \/>\n    \/\/ 1. \u83b7\u53d6\u5230\u8f93\u5165\u6846\u7684\u5185\u5bb9<br \/>\n    const QString&amp; text &#061; ui-&gt;lineEdit-&gt;text();<br \/>\n    \/\/ 2. \u6784\u9020 UDP \u7684\u8bf7\u6c42\u6570\u636e<br \/>\n    QNetworkDatagram requestDatagram(text.toUtf8(), QHostAddress(SERVER_IP), SERVER_PORT);<br \/>\n    \/\/ 3. \u53d1\u9001\u8bf7\u6c42\u6570\u636e<br \/>\n    socket-&gt;writeDatagram(requestDatagram);<br \/>\n    \/\/ 4. \u628a\u53d1\u9001\u7684\u6570\u636e\u4e5f\u6dfb\u52a0\u5230\u5217\u8868\u6846\u4e2d<br \/>\n    ui-&gt;listWidget-&gt;addItem(&#034;\u5ba2\u6237\u7aef\u53d1\u9001&#xff1a;&#034; &#043; text);<br \/>\n    \/\/ 5. \u628a\u8f93\u5165\u6846\u7684\u5185\u5bb9\u4e5f\u6e05\u7a7a\u4e00\u4e9b<br \/>\n    ui-&gt;lineEdit-&gt;setText(text);<br \/>\n}<\/p>\n<h3>3.4 processResponse \u54cd\u5e94\u62a5\u6587\u5904\u7406\u69fd<\/h3>\n<p><font color=\"#7E84F7\">\u7b80\u5355\u56de\u663e\u5373\u53ef<\/font><\/p>\n<p>void Widget::processResponse()<br \/>\n{<br \/>\n    \/\/ \u901a\u8fc7\u8fd9\u4e2a\u51fd\u6570\u6765\u5904\u7406\u6536\u5230\u7684\u54cd\u5e94<br \/>\n    \/\/ 1. \u8bfb\u53d6\u5230\u54cd\u5e94\u6570\u636e<br \/>\n    const QNetworkDatagram&amp; responseDatagram &#061; socket-&gt;receiveDatagram();<br \/>\n    QString response &#061; responseDatagram.data();<br \/>\n    \/\/ 2. \u628a\u54cd\u5e94\u6570\u636e\u663e\u793a\u5230\u754c\u9762\u4e0a<br \/>\n    ui-&gt;listWidget-&gt;addItem(&#034;\u670d\u52a1\u5668\u54cd\u5e94&#xff1a; &#034; &#043; response);<br \/>\n}<\/p>\n<h3>3.5 \u6574\u4f53\u4ee3\u7801<\/h3>\n<p>#include &#034;widget.h&#034;<br \/>\n#include &#034;ui_widget.h&#034;<\/p>\n<p>\/\/ \u5b9a\u4e49\u4e24\u4e2a\u5e38\u91cf&#xff0c;\u63cf\u8ff0\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3<br \/>\nconst QString&amp; SERVER_IP &#061; &#034;127.0.0.1&#034;;<br \/>\nconst quint16 SERVER_PORT &#061; 9090;<\/p>\n<p>Widget::Widget(QWidget *parent)<br \/>\n    : QWidget(parent)<br \/>\n    , ui(new Ui::Widget)<br \/>\n{<br \/>\n    ui-&gt;setupUi(this);<\/p>\n<p>    socket &#061; new QUdpSocket(this);<\/p>\n<p>    \/\/ \u4fee\u6539\u7a97\u53e3\u6807\u9898<br \/>\n    this-&gt;setWindowTitle(&#034;\u5ba2\u6237\u7aef&#034;);<\/p>\n<p>    \/\/ \u8fde\u63a5\u670d\u52a1\u7aef\u76f8\u5e94\u5185\u5bb9 \u548c \u5bf9\u5e94\u5904\u7406\u51fd\u6570<br \/>\n    connect(socket, &amp;QUdpSocket::readyRead, this, &amp;Widget::processResponse);<br \/>\n}<\/p>\n<p>Widget::~Widget()<br \/>\n{<br \/>\n    delete ui;<br \/>\n}<\/p>\n<p>void Widget::on_pushButton_clicked()<br \/>\n{<br \/>\n    \/\/ 1. \u83b7\u53d6\u5230\u8f93\u5165\u6846\u7684\u5185\u5bb9<br \/>\n    const QString&amp; text &#061; ui-&gt;lineEdit-&gt;text();<br \/>\n    \/\/ 2. \u6784\u9020 UDP \u7684\u8bf7\u6c42\u6570\u636e<br \/>\n    QNetworkDatagram requestDatagram(text.toUtf8(), QHostAddress(SERVER_IP), SERVER_PORT);<br \/>\n    \/\/ 3. \u53d1\u9001\u8bf7\u6c42\u6570\u636e<br \/>\n    socket-&gt;writeDatagram(requestDatagram);<br \/>\n    \/\/ 4. \u628a\u53d1\u9001\u7684\u6570\u636e\u4e5f\u6dfb\u52a0\u5230\u5217\u8868\u6846\u4e2d<br \/>\n    ui-&gt;listWidget-&gt;addItem(&#034;\u5ba2\u6237\u7aef\u53d1\u9001&#xff1a;&#034; &#043; text);<br \/>\n    \/\/ 5. \u628a\u8f93\u5165\u6846\u7684\u5185\u5bb9\u4e5f\u6e05\u7a7a\u4e00\u4e9b<br \/>\n    ui-&gt;lineEdit-&gt;setText(text);<br \/>\n}<\/p>\n<p>void Widget::processResponse()<br \/>\n{<br \/>\n    \/\/ \u901a\u8fc7\u8fd9\u4e2a\u51fd\u6570\u6765\u5904\u7406\u6536\u5230\u7684\u54cd\u5e94<br \/>\n    \/\/ 1. \u8bfb\u53d6\u5230\u54cd\u5e94\u6570\u636e<br \/>\n    const QNetworkDatagram&amp; responseDatagram &#061; socket-&gt;receiveDatagram();<br \/>\n    QString response &#061; responseDatagram.data();<br \/>\n    \/\/ 2. \u628a\u54cd\u5e94\u6570\u636e\u663e\u793a\u5230\u754c\u9762\u4e0a<br \/>\n    ui-&gt;listWidget-&gt;addItem(&#034;\u670d\u52a1\u5668\u54cd\u5e94&#xff1a; &#034; &#043; response);<br \/>\n}<\/p>\n<h2>&#x1f3f3;\ufe0f\u200d&#x1f308;\u56db\u3001\u6d4b\u8bd5<\/h2>\n<p>\u53ef\u4ee5\u770b\u5230\u6210\u529f\u56de\u663e\u4e86<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250426170531-680d125b5a938.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><font 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