{"id":90506,"date":"2026-08-05T12:17:28","date_gmt":"2026-08-05T04:17:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/90506.html"},"modified":"2026-08-05T12:17:28","modified_gmt":"2026-08-05T04:17:28","slug":"%e3%80%90%e7%ac%ac%e4%ba%8c%e7%ab%a011%e3%80%91mqtt%e4%bf%9d%e7%95%99%e6%b6%88%e6%81%af%e8%bf%87%e6%9c%9f%e6%97%b6%e9%97%b4","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/90506.html","title":{"rendered":"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4"},"content":{"rendered":"

\u524d\u8a00<\/p>\n

MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u80fd\u81ea\u52a8\u6e05\u7406\u670d\u52a1\u7aef\u8fc7\u65f6\u6570\u636e，\u786e\u4fdd\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u6709\u6548\u6700\u65b0\u72b6\u6001\u3002<\/p>\n

\u4e00\u3001MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u7b80\u4ecb<\/h3>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u4fdd\u7559\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u662fMQTT 5.0\u534f\u8bae\u4e2d\u7528\u4e8e\u63a7\u5236\u670d\u52a1\u7aef\u4fdd\u7559\u6d88\u606f\u751f\u547d\u5468\u671f\u7684\u6838\u5fc3\u7279\u6027，\u5b83\u53ef\u4ee5\u907f\u514d\u8fc7\u65f6\u7684\u5386\u53f2\u6570\u636e\u957f\u671f\u5360\u7528\u670d\u52a1\u7aef\u5b58\u50a8\u8d44\u6e90，\u540c\u65f6\u4fdd\u969c\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u5230\u7684\u59cb\u7ec8\u662f\u6709\u6548\u7684\u6700\u65b0\u6570\u636e\u3002<\/p>\n

🔍 \u6838\u5fc3\u673a\u5236\u8bf4\u660e
\n\u200c\u57fa\u7840\u5b9a\u4e49\u200c
\n\u8be5\u7279\u6027\u901a\u8fc7message-expiry-interval\u5b57\u6bb5\u5b9e\u73b0，\u4ee5\u79d2\u4e3a\u5355\u4f4d\u5b9a\u4e49\u6d88\u606f\u5728\u670d\u52a1\u7aef\u7684\u6700\u5927\u7559\u5b58\u65f6\u957f\u3002\u5f53\u4fdd\u7559\u6d88\u606f\u8d85\u8fc7\u8bbe\u5b9a\u7684\u8fc7\u671f\u65f6\u95f4\u540e，\u670d\u52a1\u7aef\u4f1a\u81ea\u52a8\u5c06\u5176\u6e05\u7406\u4e22\u5f03，\u4e0d\u4f1a\u7ee7\u7eed\u5411\u540e\u7eed\u65b0\u8ba2\u9605\u7684\u5ba2\u6237\u7aef\u63a8\u9001\u8fd9\u6761\u5df2\u5931\u6548\u7684\u6d88\u606f\u3002
\n\u200c\u4f18\u5148\u7ea7\u89c4\u5219\u200c
\n\u5ba2\u6237\u7aef\u5728\u53d1\u5e03\u6d88\u606f\u65f6\u81ea\u5b9a\u4e49\u7684\u5355\u6761\u6d88\u606f\u8fc7\u671f\u65f6\u95f4，\u4f18\u5148\u7ea7\u9ad8\u4e8e\u670d\u52a1\u7aef\u914d\u7f6e\u7684\u5168\u5c40\u9ed8\u8ba4\u8fc7\u671f\u89c4\u5219\u3002\u5982\u679c\u5ba2\u6237\u7aef\u6ca1\u6709\u5355\u72ec\u8bbe\u7f6e\u8be5\u5b57\u6bb5，\u8fd9\u6761\u4fdd\u7559\u6d88\u606f\u5c31\u4f1a\u81ea\u52a8\u6cbf\u7528\u670d\u52a1\u7aef\u914d\u7f6e\u7684\u5168\u5c40\u6709\u6548\u671f\u3002
\n\u200c\u8fc7\u671f\u5904\u7406\u903b\u8f91\u200c
\n\u90e8\u5206\u652f\u6301\u6b7b\u4fe1\u961f\u5217\u7684MQTT\u670d\u52a1（\u6bd4\u5982RabbitMQ），\u8fd8\u53ef\u4ee5\u5c06\u8fc7\u671f\u7684\u4fdd\u7559\u6d88\u606f\u8f6c\u53d1\u81f3\u9884\u5148\u914d\u7f6e\u7684\u6b7b\u4fe1\u4ea4\u6362\u5668，\u8fdb\u5165\u5bf9\u5e94\u7684\u6b7b\u4fe1\u961f\u5217，\u65b9\u4fbf\u540e\u7eed\u5bf9\u8fc7\u671f\u6570\u636e\u505a\u5ba1\u8ba1\u3001\u56de\u6eaf\u7b49\u4e8c\u6b21\u5904\u7406\u3002
\n\u2699\ufe0f \u4e3b\u6d41\u670d\u52a1\u7aef\u914d\u7f6e\u65b9\u5f0f
\n\u4ee5\u5e38\u7528\u7684EMQX\u670d\u52a1\u4e3a\u4f8b，\u4f60\u53ef\u4ee5\u76f4\u63a5\u5728\u53ef\u89c6\u5316\u540e\u53f0\u5b8c\u6210\u5168\u5c40\u8fc7\u671f\u89c4\u5219\u914d\u7f6e：<\/p>\n

\u6253\u5f00EMQX Dashboard，\u8fdb\u5165\u300c\u76d1\u63a7 -> \u4fdd\u7559\u6d88\u606f\u300d\u9875\u9762
\n\u5728\u8bbe\u7f6e\u680f\u627e\u5230\u300c\u6709\u6548\u671f\u300d\u914d\u7f6e\u9879，\u8bbe\u7f6e\u5bf9\u5e94\u65f6\u957f，0\u4ee3\u8868\u5168\u5c40\u9ed8\u8ba4\u6c38\u4e0d\u8fc7\u671f
\n\u540c\u65f6\u914d\u7f6e\u300c\u5b9a\u65f6\u6e05\u7406\u300d\u95f4\u9694，\u8ba9\u670d\u52a1\u7aef\u6309\u7167\u8bbe\u5b9a\u5468\u671f\u81ea\u52a8\u626b\u63cf\u56de\u6536\u6240\u6709\u8fc7\u671f\u7684\u4fdd\u7559\u6d88\u606f，\u907f\u514d\u65e0\u6548\u5360\u7528\u5b58\u50a8\u3002
\n💡 \u5b9e\u9645\u4f7f\u7528\u6ce8\u610f\u4e8b\u9879
\n\u8fc7\u671f\u65f6\u95f4\u9700\u8981\u7ed3\u5408\u4e1a\u52a1\u573a\u666f\u7075\u6d3b\u8c03\u6574：\u4f4e\u9891\u6b21\u4e0a\u62a5\u7684\u4f20\u611f\u5668\u6570\u636e\u53ef\u4ee5\u8bbe\u7f6e\u8f83\u957f\u7684\u6709\u6548\u671f，\u800c\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u8bbe\u5907\u72b6\u6001\u6570\u636e，\u5efa\u8bae\u8bbe\u7f6e\u8f83\u77ed\u7684\u8fc7\u671f\u65f6\u95f4，\u907f\u514d\u65b0\u8ba2\u9605\u8005\u62ff\u5230\u8fc7\u65f6\u7684\u72b6\u6001\u4fe1\u606f\u3002
\n\u4e0d\u8981\u5728\u670d\u52a1\u7aef\u65e0\u9650\u5236\u7559\u5b58\u5927\u91cf\u6c38\u4e45\u6709\u6548\u7684\u4fdd\u7559\u6d88\u606f，\u8fd9\u4f1a\u6301\u7eed\u5360\u7528\u670d\u52a1\u7aef\u5185\u5b58\u548c\u78c1\u76d8\u8d44\u6e90，\u5f71\u54cd\u96c6\u7fa4\u6574\u4f53\u6027\u80fd\u3002
\n\u5bf9\u4e8e\u9700\u8981\u957f\u671f\u6301\u4e45\u5316\u5b58\u50a8\u7684\u5173\u952e\u6570\u636e，\u4e0d\u5efa\u8bae\u4f9d\u8d56MQTT\u670d\u52a1\u7684\u4fdd\u7559\u6d88\u606f\u80fd\u529b，\u6700\u597d\u5c06\u6570\u636e\u540c\u6b65\u81f3\u6570\u636e\u5e93\u505a\u72ec\u7acb\u6301\u4e45\u5316\u3002<\/p>\n

\u4e8c\u3001\u4e3a\u4ec0\u4e48\u4fdd\u7559\u6d88\u606f\u9700\u8981\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4<\/h3>\n

\u7ed9MQTT\u4fdd\u7559\u6d88\u606f\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4，\u6838\u5fc3\u662f\u4e3a\u4e86\u89c4\u907f\u65e0\u671f\u9650\u7559\u5b58\u5e26\u6765\u7684\u5404\u7c7b\u8d44\u6e90\u6d6a\u8d39\u548c\u4e1a\u52a1\u903b\u8f91\u5f02\u5e38，\u5177\u4f53\u4f5c\u7528\u4f53\u73b0\u5728\u8fd9\u51e0\u4e2a\u65b9\u9762：<\/p>\n

📦 \u81ea\u52a8\u91ca\u653e\u670d\u52a1\u7aef\u5b58\u50a8\u8d44\u6e90
\n\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4fdd\u7559\u6d88\u606f\u4e0d\u4f1a\u81ea\u52a8\u8fc7\u671f，\u5373\u4fbf\u53d1\u5e03\u8be5\u6d88\u606f\u7684\u5ba2\u6237\u7aef\u65e9\u5df2\u79bb\u7ebf\u3001\u5bf9\u5e94\u7684\u4e1a\u52a1\u72b6\u6001\u65e9\u5df2\u5931\u6548，\u8fd9\u6761\u6d88\u606f\u4f9d\u7136\u4f1a\u957f\u671f\u5360\u7528\u670d\u52a1\u7aef\u7684\u5185\u5b58\u6216\u78c1\u76d8\u7a7a\u95f4\u3002\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u540e，\u670d\u52a1\u7aef\u4f1a\u5728\u6d88\u606f\u5230\u671f\u540e\u81ea\u52a8\u6e05\u7406，\u65e0\u9700\u624b\u52a8\u53d1\u9001\u7a7a\u6d88\u606f\u6765\u5220\u9664\u65e7\u7684\u4fdd\u7559\u6d88\u606f，\u907f\u514d\u5927\u91cf\u65e0\u6548\u5386\u53f2\u6570\u636e\u5806\u79ef\u62d6\u6162\u670d\u52a1\u6027\u80fd\u3002<\/p>\n

\u26a1 \u4fdd\u969c\u6570\u636e\u65f6\u6548\u6027，\u907f\u514d\u4f20\u9012\u65e0\u6548\u4fe1\u606f
\n\u4fdd\u7559\u6d88\u606f\u662f\u670d\u52a1\u7aef\u4e3a\u6bcf\u4e2a\u4e3b\u9898\u7559\u5b58\u7684\u201c\u6700\u65b0\u72b6\u6001\u5feb\u7167\u201d，\u5982\u679c\u6ca1\u6709\u8fc7\u671f\u673a\u5236，\u65b0\u8ba2\u9605\u8be5\u4e3b\u9898\u7684\u5ba2\u6237\u7aef\u53ef\u80fd\u4f1a\u62ff\u5230\u65e9\u5df2\u8fc7\u65f6\u7684\u5386\u53f2\u6570\u636e，\u6bd4\u5982\u8fc7\u671f\u7684\u4f20\u611f\u5668\u8bfb\u6570\u3001\u5931\u6548\u7684\u8bbe\u5907\u63a7\u5236\u6307\u4ee4，\u8fd9\u7c7b\u65e0\u610f\u4e49\u7684\u65e7\u6570\u636e\u4e0d\u4ec5\u6ca1\u6709\u4e1a\u52a1\u4ef7\u503c，\u751a\u81f3\u53ef\u80fd\u5f15\u53d1\u9519\u8bef\u7684\u4e1a\u52a1\u5224\u65ad\u3002\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u540e，\u5ba2\u6237\u7aef\u53ea\u4f1a\u83b7\u53d6\u5230\u5728\u6709\u6548\u671f\u5185\u7684\u6709\u6548\u72b6\u6001\u6570\u636e\u3002<\/p>\n

🔗 \u9002\u914d\u96c6\u7fa4\u4e0e\u8de8\u6865\u63a5\u573a\u666f\u7684\u65f6\u6548\u6027\u4f20\u9012
\n\u5728MQTT\u96c6\u7fa4\u6216\u8005\u8de8\u8282\u70b9\u6865\u63a5\u8f6c\u53d1\u7684\u573a\u666f\u4e2d，\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f，\u4f1a\u5728\u8f6c\u53d1\u8fc7\u7a0b\u4e2d\u81ea\u52a8\u66f4\u65b0\u5269\u4f59\u8fc7\u671f\u95f4\u9694，\u8ba9\u6574\u6761\u4f20\u8f93\u94fe\u8def\u90fd\u80fd\u611f\u77e5\u5230\u6d88\u606f\u7684\u5269\u4f59\u6709\u6548\u671f，\u907f\u514d\u8fc7\u671f\u7684\u4fdd\u7559\u6d88\u606f\u5728\u591a\u4e2a\u8282\u70b9\u4e4b\u95f4\u53cd\u590d\u6d41\u8f6c，\u6d6a\u8d39\u7f51\u7edc\u5e26\u5bbd\u548c\u8282\u70b9\u5904\u7406\u8d44\u6e90\u3002<\/p>\n

🛡\ufe0f \u964d\u4f4e\u5f02\u5e38\u573a\u666f\u4e0b\u7684\u4e1a\u52a1\u98ce\u9669
\n\u5bf9\u4e8e\u8fdc\u7a0b\u63a7\u5236\u6307\u4ee4\u3001\u9650\u65f6\u901a\u77e5\u8fd9\u7c7b\u5f3a\u65f6\u6548\u6027\u7684\u4e1a\u52a1\u573a\u666f，\u4e00\u65e6\u6d88\u606f\u56e0\u4e3a\u7f51\u7edc\u5ef6\u8fdf\u7b49\u539f\u56e0\u957f\u65f6\u95f4\u6ede\u7559\u5728\u670d\u52a1\u7aef，\u8fc7\u671f\u540e\u4f1a\u88ab\u81ea\u52a8\u4e22\u5f03，\u4e0d\u4f1a\u5728\u5ef6\u8fdf\u5f88\u4e45\u4e4b\u540e\u624d\u63a8\u9001\u7ed9\u5ba2\u6237\u7aef\u6267\u884c，\u907f\u514d\u56e0\u6307\u4ee4\u5931\u6548\u5f15\u53d1\u8bbe\u5907\u8bef\u64cd\u4f5c\u7b49\u5b89\u5168\u95ee\u9898\u3002<\/p>\n

\u4e09\u3001\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e<\/h3>\n

\u5728MQTT 5.0\u534f\u8bae\u4e2d，\u4fdd\u7559\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u53ef\u4ee5\u901a\u8fc7\u200c\u5ba2\u6237\u7aef\u53d1\u5e03\u914d\u7f6e\u200c\u548c\u200c\u670d\u52a1\u7aef\u5168\u5c40\u914d\u7f6e\u200c\u4e24\u79cd\u65b9\u5f0f\u7075\u6d3b\u8bbe\u7f6e，\u4f18\u5148\u7ea7\u4e0a\u5ba2\u6237\u7aef\u5355\u6761\u6d88\u606f\u7684\u914d\u7f6e\u4f1a\u9ad8\u4e8e\u670d\u52a1\u7aef\u5168\u5c40\u914d\u7f6e：
\n📌 \u5ba2\u6237\u7aef\u5355\u6761\u6d88\u606f\u8bbe\u7f6e（\u4f18\u5148\u7ea7\u66f4\u9ad8）
\n\u5728\u53d1\u5e03\u4fdd\u7559\u6d88\u606f\u65f6，\u76f4\u63a5\u5728PUBLISH\u62a5\u6587\u4e2d\u8bbe\u7f6e\u6d88\u606f\u8fc7\u671f\u95f4\u9694（message-expiry-interval）\u5b57\u6bb5，\u5355\u4f4d\u4e3a\u79d2\u3002\u8fd9\u6761\u6d88\u606f\u5c31\u4f1a\u5728\u8bbe\u5b9a\u7684\u65f6\u957f\u5230\u671f\u540e，\u88ab\u670d\u52a1\u7aef\u81ea\u52a8\u6e05\u7406\u4e22\u5f03\u3002
\n\u6bd4\u5982\u4f60\u53ef\u4ee5\u6307\u5b9a\u67d0\u6761\u4f20\u611f\u5668\u5c5e\u6027\u7684\u4fdd\u7559\u6d88\u606f\u4ec5\u5728\u670d\u52a1\u7aef\u7559\u5b583600\u79d2，\u5230\u671f\u540e\u81ea\u52a8\u5931
\n📝 \u4ee3\u7801\u793a\u4f8b：\u5ba2\u6237\u7aef\u8bbe\u7f6e\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4<\/p>\n

\u4e0b\u9762\u5206\u522b\u5c55\u793a\u5982\u4f55\u4f7f\u7528 Paho MQTT Python \u5ba2\u6237\u7aef\u548c MQTT.js JavaScript \u5ba2\u6237\u7aef\u53d1\u5e03\u5e26\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f：<\/p>\n

Python (Paho MQTT) \u793a\u4f8b：<\/p>\n

import<\/span> paho.<\/span>mqtt.<\/span>client as<\/span> mqtt
\nimport<\/span> time<\/p>\n

# \u521b\u5efa MQTT \u5ba2\u6237\u7aef（\u9700\u652f\u6301 MQTT 5.0）<\/span>
\nclient =<\/span> mqtt.<\/span>Client(<\/span>protocol=<\/span>mqtt.<\/span>MQTTv5)<\/span><\/p>\n

# \u8bbe\u7f6e\u8fde\u63a5\u53c2\u6570<\/span>
\nclient.<\/span>connect(<\/span>"broker.example.com"<\/span>,<\/span> 1883<\/span>,<\/span> 60<\/span>)<\/span><\/p>\n

# \u51c6\u5907\u6d88\u606f\u5c5e\u6027（MQTT 5.0 \u7279\u6027）<\/span>
\nproperties =<\/span> mqtt.<\/span>Properties(<\/span>mqtt.<\/span>PacketTypes.<\/span>PUBLISH)<\/span>
\nproperties.<\/span>MessageExpiryInterval =<\/span> 3600<\/span> # \u8bbe\u7f6e\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u4e3a 3600 \u79d2（1\u5c0f\u65f6）<\/span><\/p>\n

# \u53d1\u5e03\u5e26\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f<\/span>
\ntopic =<\/span> "sensors\/temperature"<\/span>
\npayload =<\/span> '{"value": 25.5, "unit": "celsius"}'<\/span>
\nclient.<\/span>publish(<\/span>topic,<\/span> payload,<\/span> qos=<\/span>1<\/span>,<\/span> retain=<\/span>True<\/span>,<\/span> properties=<\/span>properties)<\/span><\/p>\n

print<\/span>(<\/span>"\u5df2\u53d1\u5e03\u5e26 1 \u5c0f\u65f6\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f"<\/span>)<\/span>
\nclient.<\/span>disconnect(<\/span>)<\/span><\/p>\n

JavaScript (MQTT.js) \u793a\u4f8b：<\/p>\n

const<\/span> mqtt =<\/span> require<\/span>(<\/span>'mqtt'<\/span>)<\/span><\/p>\n

\/\/ \u521b\u5efa MQTT \u5ba2\u6237\u7aef（\u9700\u652f\u6301 MQTT 5.0）<\/span>
\nconst<\/span> client =<\/span> mqtt.<\/span>connect<\/span>(<\/span>'mqtt:\/\/broker.example.com'<\/span>,<\/span> {<\/span>
\n protocolVersion<\/span>:<\/span> 5<\/span> \/\/ \u4f7f\u7528 MQTT 5.0<\/span>
\n}<\/span>)<\/span><\/p>\n

client.<\/span>on<\/span>(<\/span>'connect'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
\n \/\/ \u51c6\u5907\u6d88\u606f\u5c5e\u6027<\/span>
\n const<\/span> properties =<\/span> {<\/span>
\n messageExpiryInterval<\/span>:<\/span> 3600<\/span> \/\/ \u8bbe\u7f6e\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u4e3a 3600 \u79d2（1\u5c0f\u65f6）<\/span>
\n }<\/span><\/p>\n

\/\/ \u53d1\u5e03\u5e26\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f<\/span>
\n const<\/span> topic =<\/span> 'sensors\/temperature'<\/span>
\n const<\/span> payload =<\/span> JSON<\/span>.<\/span>stringify<\/span>(<\/span>{<\/span> value<\/span>:<\/span> 25.5<\/span>,<\/span> unit<\/span>:<\/span> 'celsius'<\/span> }<\/span>)<\/span><\/p>\n

client.<\/span>publish<\/span>(<\/span>topic,<\/span> payload,<\/span> {<\/span>
\n qos<\/span>:<\/span> 1<\/span>,<\/span>
\n retain<\/span>:<\/span> true<\/span>,<\/span>
\n properties<\/span>:<\/span> properties
\n }<\/span>,<\/span> (<\/span>err<\/span>)<\/span> =><\/span> {<\/span>
\n if<\/span> (<\/span>!<\/span>err)<\/span> {<\/span>
\n console.<\/span>log<\/span>(<\/span>'\u5df2\u53d1\u5e03\u5e26 1 \u5c0f\u65f6\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f'<\/span>)<\/span>
\n }<\/span>
\n client.<\/span>end<\/span>(<\/span>)<\/span>
\n }<\/span>)<\/span>
\n}<\/span>
\n)<\/span><\/p>\n

Java (MQTT Paho) \u793a\u4f8b：<\/p>\n

import<\/span> org.<\/span>eclipse.<\/span>paho.<\/span>mqttv5.<\/span>client.<\/span><\/span>MqttClient<\/span><\/span>;<\/span>
\nimport<\/span> org.<\/span>eclipse.<\/span>paho.<\/span>mqttv5.<\/span>client.<\/span><\/span>MqttConnectionOptions<\/span><\/span>;<\/span>
\nimport<\/span> org.<\/span>eclipse.<\/span>paho.<\/span>mqttv5.<\/span>client.<\/span>persist.<\/span><\/span>MemoryPersistence<\/span><\/span>;<\/span>
\nimport<\/span> org.<\/span>eclipse.<\/span>paho.<\/span>mqttv5.<\/span>common.<\/span><\/span>MqttException<\/span><\/span>;<\/span>
\nimport<\/span> org.<\/span>eclipse.<\/span>paho.<\/span>mqttv5.<\/span>common.<\/span><\/span>MqttMessage<\/span><\/span>;<\/span>
\nimport<\/span> org.<\/span>eclipse.<\/span>paho.<\/span>mqttv5.<\/span>common.<\/span>packet.<\/span><\/span>MqttProperties<\/span><\/span>;<\/span><\/p>\n

public<\/span> class<\/span> MqttRetainWithExpiry<\/span> {<\/span>
\n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
\n String<\/span> broker =<\/span> "tcp:\/\/broker.example.com:1883"<\/span>;<\/span>
\n String<\/span> clientId =<\/span> "JavaRetainClient"<\/span>;<\/span>
\n MemoryPersistence<\/span> persistence =<\/span> new<\/span> MemoryPersistence<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

try<\/span> {<\/span>
\n \/\/ \u521b\u5efa MQTT 5.0 \u5ba2\u6237\u7aef<\/span>
\n MqttClient<\/span> client =<\/span> new<\/span> MqttClient<\/span>(<\/span>broker,<\/span> clientId,<\/span> persistence)<\/span>;<\/span><\/p>\n

\/\/ \u8bbe\u7f6e\u8fde\u63a5\u9009\u9879<\/span>
\n MqttConnectionOptions<\/span> connOpts =<\/span> new<\/span> MqttConnectionOptions<\/span>(<\/span>)<\/span>;<\/span>
\n connOpts.<\/span>setCleanStart<\/span>(<\/span>true<\/span>)<\/span>;<\/span><\/p>\n

\/\/ \u8fde\u63a5\u5230\u4ee3\u7406<\/span>
\n client.<\/span>connect<\/span>(<\/span>connOpts)<\/span>;<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5df2\u8fde\u63a5\u5230 MQTT \u4ee3\u7406"<\/span>)<\/span>;<\/span><\/p>\n

\/\/ \u51c6\u5907\u6d88\u606f\u5c5e\u6027（\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4）<\/span>
\n MqttProperties<\/span> properties =<\/span> new<\/span> MqttProperties<\/span>(<\/span>)<\/span>;<\/span>
\n properties.<\/span>setMessageExpiryInterval<\/span>(<\/span>3600L<\/span>)<\/span>;<\/span> \/\/ \u8bbe\u7f6e\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u4e3a 3600 \u79d2（1\u5c0f\u65f6）<\/span><\/p>\n

\/\/ \u521b\u5efa\u6d88\u606f\u5e76\u8bbe\u7f6e\u4fdd\u7559\u6807\u5fd7<\/span>
\n String<\/span> content =<\/span> "{\\\\"value\\\\": 25.5, \\\\"unit\\\\": \\\\"celsius\\\\"}"<\/span>;<\/span>
\n MqttMessage<\/span> message =<\/span> new<\/span> MqttMessage<\/span>(<\/span>content.<\/span>getBytes<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n message.<\/span>setQos<\/span>(<\/span>1<\/span>)<\/span>;<\/span>
\n message.<\/span>setRetained<\/span>(<\/span>true<\/span>)<\/span>;<\/span> \/\/ \u8bbe\u7f6e\u4e3a\u4fdd\u7559\u6d88\u606f<\/span>
\n message.<\/span>setProperties<\/span>(<\/span>properties)<\/span>;<\/span> \/\/ \u8bbe\u7f6e\u6d88\u606f\u5c5e\u6027<\/span><\/p>\n

\/\/ \u53d1\u5e03\u5e26\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f<\/span>
\n String<\/span> topic =<\/span> "sensors\/temperature"<\/span>;<\/span>
\n client.<\/span>publish<\/span>(<\/span>topic,<\/span> message)<\/span>;<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5df2\u53d1\u5e03\u5e26 1 \u5c0f\u65f6\u8fc7\u671f\u65f6\u95f4\u7684\u4fdd\u7559\u6d88\u606f\u5230\u4e3b\u9898: "<\/span> +<\/span> topic)<\/span>;<\/span><\/p>\n

\/\/ \u65ad\u5f00\u8fde\u63a5<\/span>
\n client.<\/span>disconnect<\/span>(<\/span>)<\/span>;<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5df2\u65ad\u5f00\u8fde\u63a5"<\/span>)<\/span>;<\/span><\/p>\n

}<\/span> catch<\/span> (<\/span>MqttException<\/span> e)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u53d1\u5e03\u5931\u8d25: "<\/span> +<\/span> e.<\/span>getMessage<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n e.<\/span>printStackTrace<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u5173\u952e\u70b9\u8bf4\u660e：<\/p>\n

  • \u534f\u8bae\u7248\u672c：\u5fc5\u987b\u4f7f\u7528 MQTT 5.0 \u534f\u8bae（protocol=mqtt.MQTTv5 \u6216 protocolVersion: 5）<\/li>\n
  • \u6d88\u606f\u5c5e\u6027：\u901a\u8fc7 messageExpiryInterval（\u6216 MessageExpiryInterval）\u5b57\u6bb5\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4（\u5355\u4f4d：\u79d2）<\/li>\n
  • \u4fdd\u7559\u6807\u5fd7：\u8bbe\u7f6e retain=True（\u6216 retain: true）\u4f7f\u6d88\u606f\u6210\u4e3a\u4fdd\u7559\u6d88\u606f<\/li>\n
  • \u4f18\u5148\u7ea7：\u5ba2\u6237\u7aef\u8bbe\u7f6e\u7684\u8fc7\u671f\u65f6\u95f4\u4f18\u5148\u7ea7\u9ad8\u4e8e\u670d\u52a1\u7aef\u5168\u5c40\u914d\u7f6e<\/li>\n

    \u6548\u5220\u9664\u3002<\/p>\n

    \u2699\ufe0f \u670d\u52a1\u7aef\u5168\u5c40\u9ed8\u8ba4\u914d\u7f6e
    \n\u4ee5\u4e3b\u6d41\u7684EMQX MQTT 5.0\u670d\u52a1\u5668\u4e3a\u4f8b，\u53ef\u4ee5\u5728\u670d\u52a1\u7aef\u540e\u53f0\u7edf\u4e00\u914d\u7f6e\u4fdd\u7559\u6d88\u606f\u7684\u9ed8\u8ba4\u8fc7\u671f\u89c4\u5219：<\/p>\n

    \u6253\u5f00EMQX Dashboard，\u8fdb\u5165\u300c\u76d1\u63a7 -> \u4fdd\u7559\u6d88\u606f\u300d\u9875\u9762，\u627e\u5230\u8bbe\u7f6e\u680f
    \n\u627e\u5230\u300c\u6709\u6548\u671f\u300d\u914d\u7f6e\u9879，\u8bbe\u7f6e\u4e3a\u5bf9\u5e94\u7684\u65f6\u957f，0\u4ee3\u8868\u6c38\u4e0d\u8fc7\u671f
    \n\u540c\u65f6\u53ef\u4ee5\u914d\u7f6e\u300c\u5b9a\u65f6\u6e05\u7406\u300d\u95f4\u9694，\u8ba9\u670d\u52a1\u7aef\u6309\u7167\u8bbe\u5b9a\u7684\u5468\u671f\u81ea\u52a8\u626b\u63cf\u56de\u6536\u6240\u6709\u8fc7\u671f\u7684\u4fdd\u7559\u6d88\u606f，\u907f\u514d\u65e0\u6548\u5360\u7528\u5b58\u50a8\u8d44\u6e90
    \n\u5982\u679c\u5ba2\u6237\u7aef\u53d1\u5e03\u7684\u4fdd\u7559\u6d88\u606f\u6ca1\u6709\u5355\u72ec\u8bbe\u7f6e\u6d88\u606f\u8fc7\u671f\u95f4\u9694，\u5c31\u4f1a\u81ea\u52a8\u6cbf\u7528\u670d\u52a1\u7aef\u914d\u7f6e\u7684\u5168\u5c40\u9ed8\u8ba4\u6709\u6548\u671f\u3002<\/p>\n

    \u56db\u3001\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u5bf9\u5ba2\u6237\u7aef\u7684\u5f71\u54cd<\/h3>\n

    MQTT\u4fdd\u7559\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u5bf9\u5ba2\u6237\u7aef\u7684\u5f71\u54cd\u6574\u4f53\u504f\u5411\u95f4\u63a5，\u4e0d\u4f1a\u76f4\u63a5\u6539\u53d8\u5ba2\u6237\u7aef\u7684\u6838\u5fc3\u8fd0\u884c\u903b\u8f91，\u4e3b\u8981\u4f53\u73b0\u5728\u6d88\u606f\u83b7\u53d6\u3001\u4f20\u8f93\u6548\u7387\u548c\u4e1a\u52a1\u6570\u636e\u6709\u6548\u6027\u4e09\u4e2a\u7ef4\u5ea6：<\/p>\n

    📩 \u6d88\u606f\u83b7\u53d6\u884c\u4e3a\u53d8\u5316
    \n\u8fc7\u671f\u7684\u4fdd\u7559\u6d88\u606f\u4f1a\u88ab\u670d\u52a1\u7aef\u81ea\u52a8\u6e05\u7406，\u65b0\u8ba2\u9605\u8be5\u4e3b\u9898\u7684\u5ba2\u6237\u7aef\u5c06\u65e0\u6cd5\u6536\u5230\u8fd9\u6761\u5df2\u5931\u6548\u7684\u5386\u53f2\u6d88\u606f，\u4e0d\u4f1a\u50cf\u672a\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u65f6\u90a3\u6837，\u59cb\u7ec8\u80fd\u62ff\u5230\u8be5\u4e3b\u9898\u7684\u6700\u540e\u4e00\u6761\u7559\u5b58\u6570\u636e\u3002
    \n\u5ba2\u6237\u7aef\u6536\u5230\u4fdd\u7559\u6d88\u606f\u65f6，\u6d88\u606f\u91cc\u7684\u5269\u4f59\u8fc7\u671f\u95f4\u9694\u4f1a\u88ab\u670d\u52a1\u7aef\u81ea\u52a8\u66f4\u65b0\u4e3a\u201c\u539f\u59cb\u8fc7\u671f\u65f6\u957f\u51cf\u53bb\u5728\u670d\u52a1\u7aef\u5df2\u505c\u7559\u7684\u65f6\u95f4\u201d，\u5ba2\u6237\u7aef\u53ef\u4ee5\u76f4\u63a5\u8bfb\u53d6\u8fd9\u4e2a\u5b57\u6bb5，\u5224\u65ad\u8fd9\u6761\u4fdd\u7559\u6d88\u606f\u7684\u5269\u4f59\u6709\u6548\u65f6\u957f\u3002
    \n🚀 \u4f20\u8f93\u4e0e\u8d44\u6e90\u4f18\u5316
    \n\u907f\u514d\u5ba2\u6237\u7aef\u4e0a\u7ebf\u540e\u6536\u5230\u5927\u91cf\u65e9\u5df2\u5931\u6548\u7684\u5386\u53f2\u4fdd\u7559\u6d88\u606f，\u51cf\u5c11\u65e0\u6548\u6570\u636e\u7684\u5e26\u5bbd\u5360\u7528，\u4e5f\u80fd\u964d\u4f4e\u5ba2\u6237\u7aef\u672c\u5730\u5904\u7406\u8fc7\u65f6\u6570\u636e\u7684\u6027\u80fd\u5f00\u9500\u3002
    \n\u5728MQTT\u96c6\u7fa4\u6216\u8de8\u6865\u63a5\u573a\u666f\u4e0b，\u5269\u4f59\u8fc7\u671f\u95f4\u9694\u4f1a\u968f\u6d88\u606f\u540c\u6b65\u4f20\u9012，\u4fdd\u8bc1\u6574\u6761\u94fe\u8def\u91cc\u7684\u6240\u6709\u5ba2\u6237\u7aef\u90fd\u80fd\u611f\u77e5\u5230\u6d88\u606f\u7684\u65f6\u6548\u6027，\u4e0d\u4f1a\u51fa\u73b0\u8de8\u8282\u70b9\u8f6c\u53d1\u8fc7\u671f\u6570\u636e\u7684\u95ee\u9898\u3002
    \n\u2699\ufe0f \u8ba2\u9605\u903b\u8f91\u9002\u914d\u5f71\u54cd
    \n\u90e8\u5206\u652f\u6301MQTT 5.0\u7279\u6027\u7684\u5ba2\u6237\u7aef，\u53ef\u4ee5\u5728\u8ba2\u9605\u65f6\u901a\u8fc7\u914d\u7f6eRetain Handling\u53c2\u6570，\u7075\u6d3b\u63a7\u5236\u4e0d\u540c\u573a\u666f\u4e0b\u4fdd\u7559\u6d88\u606f\u7684\u63a8\u9001\u89c4\u5219，\u7ed3\u5408\u8fc7\u671f\u65f6\u95f4\u5b9e\u73b0\u66f4\u7cbe\u7ec6\u5316\u7684\u8ba2\u9605\u7b56\u7565\u3002
    \n\u5982\u679c\u670d\u52a1\u7aef\u914d\u7f6e\u4e86\u6b7b\u4fe1\u8f6c\u53d1，\u8fc7\u671f\u7684\u4fdd\u7559\u6d88\u606f\u4f1a\u88ab\u8def\u7531\u5230\u9884\u8bbe\u7684\u6b7b\u4fe1\u961f\u5217，\u8ba2\u9605\u6b7b\u4fe1\u4e3b\u9898\u7684\u5ba2\u6237\u7aef\u53ef\u4ee5\u6536\u5230\u8fd9\u4e9b\u8fc7\u671f\u6d88\u606f，\u7528\u4e8e\u6570\u636e\u5ba1\u8ba1\u3001\u5f02\u5e38\u56de\u6eaf\u7b49\u4e8c\u6b21\u5904\u7406\u3002<\/p>\n

    \u4e94\u3001\u8fc7\u671f\u65f6\u95f4\u6548\u679c\u6f14\u793a<\/h3>\n

    1，\u53d1\u5e03\u8005\u5ba2\u6237\u7aef\u548cbroker\u5efa\u7acb\u94fe\u63a5
    \n2，\u8ba2\u9605\u8005\u5ba2\u6237\u7aef\u548cbroker\u5efa\u7acb\u94fe\u63a5\u4e4b\u524d，\u5148\u9700\u8981\u628a\u6211\u4eec\u7684\u4f1a\u8bdd\u65f6\u95f4\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u6210300\u79d2
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    3，\u5efa\u7acb\u94fe\u63a5
    \n4，\u8ba2\u9605\u4e00\u4e2atest\/c\u4e3b\u9898
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    5，\u8ba2\u9605\u5ba2\u6237\u7aef\u65ad\u5f00\u94fe\u63a5，\u79bb\u7ebf\u5ba2\u6237\u7aef
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    6，\u53d1\u5e03\u5ba2\u6237\u7aef，\u5411test\/c\u4e3b\u9898\u53d1\u5e03\u6d88\u606f
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n7，\u8ba2\u9605\u5ba2\u6237\u7aef\u9700\u8981\u4f7f\u7528\u4e4b\u524d\u7684\u4f1a\u8bdd，\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u6c38\u4e0d\u8fc7\u671f
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n8，\u8ba2\u9605\u8005\u5ba2\u6237\u7aef\u6536\u5230\u4e86\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\u8fd8\u526942\u79d2\u7684\u6d88\u606f（\u8fc7\u671f\u65f6\u95f45\u79d2\u7684\u5df2\u7ecf\u8fc7\u671f）
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u516d\u3001MQTT\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u548c\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u6709\u5565\u533a\u522b<\/h3>\n

    🔍 \u6838\u5fc3\u5b9a\u4e49\u5dee\u5f02
    \n\u200c\u666e\u901aMQTT\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u200c：\u662fMQTT 5.0\u6807\u51c6\u5b9a\u4e49\u7684\u901a\u7528\u5c5e\u6027，\u4f5c\u7528\u4e8e\u6240\u6709\u7c7b\u578b\u7684\u666e\u901a\u5e94\u7528\u6d88\u606f，\u7528\u6765\u6307\u5b9a\u5355\u6761\u6d88\u606f\u5728\u670d\u52a1\u7aef\u7684\u6700\u5927\u7b49\u5f85\u5b58\u6d3b\u65f6\u957f，\u8d85\u65f6\u540e\u5982\u679c\u8fd8\u672a\u6210\u529f\u63a8\u9001\u7ed9\u8ba2\u9605\u8005\u5c31\u4f1a\u88ab\u76f4\u63a5\u5220\u9664\u3002
    \n\u200c\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u200c：\u662fMQTT\u670d\u52a1\u7aef\u9488\u5bf9\u7279\u6b8a\u7684Retain\u6807\u5fd7\u6d88\u606f\u5355\u72ec\u914d\u7f6e\u7684\u4e13\u5c5e\u8fc7\u671f\u89c4\u5219，\u4e13\u95e8\u7ba1\u63a7\u8fd9\u7c7b\u88ab\u670d\u52a1\u7aef\u6301\u4e45\u7559\u5b58\u3001\u7528\u4e8e\u7ed9\u65b0\u8ba2\u9605\u8005\u63a8\u9001\u4e3b\u9898\u6700\u65b0\u72b6\u6001\u7684\u6d88\u606f\u7684\u5b58\u50a8\u751f\u547d\u5468\u671f\u3002
    \n📋 \u7ba1\u63a7\u5bf9\u8c61\u4e0d\u540c
    \n\u666e\u901a\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u8986\u76d6\u6240\u6709\u666e\u901a\u53d1\u5e03\u6d88\u606f，\u6700\u5178\u578b\u7684\u7ba1\u63a7\u573a\u666f\u662fQoS 1\/2\u7ea7\u522b\u7684\u79bb\u7ebf\u6d88\u606f：\u5f53\u8ba2\u9605\u8005\u957f\u65f6\u95f4\u79bb\u7ebf\u65f6，\u670d\u52a1\u7aef\u4e3a\u5176\u6682\u5b58\u7684\u672a\u9001\u8fbe\u6d88\u606f，\u8d85\u65f6\u540e\u4f1a\u81ea\u52a8\u6e05\u7406，\u907f\u514d\u8ba2\u9605\u8005\u4e0a\u7ebf\u540e\u6536\u5230\u5927\u91cf\u8fc7\u65f6\u6570\u636e\u3002
    \n\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u4ec5\u4f5c\u7528\u4e8e\u8bbe\u7f6e\u4e86Retain=1\u7684\u7279\u6b8a\u6d88\u606f，\u8fd9\u7c7b\u6d88\u606f\u4e0d\u4f1a\u968f\u53d1\u5e03\u8005\u7684\u4f1a\u8bdd\u7ed3\u675f\u800c\u6d88\u5931，\u4f1a\u88ab\u670d\u52a1\u7aef\u5355\u72ec\u5b58\u50a8\u5728\u5bf9\u5e94\u4e3b\u9898\u4e0b，\u76f4\u5230\u89e6\u53d1\u8fc7\u671f\u89c4\u5219\u624d\u4f1a\u88ab\u79fb\u9664\u3002<\/p>\n

    \u2699\ufe0f \u914d\u7f6e\u4f18\u5148\u7ea7\u4e0d\u540c
    \n\u5982\u679c\u4e00\u6761\u4fdd\u7559\u6d88\u606f\u5728\u53d1\u5e03\u65f6\u540c\u65f6\u8bbe\u7f6e\u4e86\u666e\u901a\u6d88\u606f\u8fc7\u671f\u65f6\u95f4，\u90a3\u4e48\u53d1\u5e03\u62a5\u6587\u91cc\u7684\u5355\u6761\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u4f18\u5148\u7ea7\u66f4\u9ad8，\u4f1a\u8986\u76d6\u670d\u52a1\u7aef\u5168\u5c40\u914d\u7f6e\u7684\u4fdd\u7559\u6d88\u606f\u9ed8\u8ba4\u8fc7\u671f\u65f6\u95f4，\u4ee5\u53d1\u5e03\u8005\u6307\u5b9a\u7684\u65f6\u957f\u4e3a\u51c6\u6267\u884c\u8fc7\u671f\u6e05\u7406\u3002<\/p>\n

    🎯 \u4e1a\u52a1\u4f5c\u7528\u4e0d\u540c
    \n\u666e\u901a\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u4e3b\u8981\u7528\u6765\u8fc7\u6ee4\u666e\u901a\u6d41\u8f6c\u6d88\u606f\u91cc\u7684\u65e0\u6548\u6570\u636e，\u907f\u514d\u8fc7\u671f\u7684\u901a\u77e5\u3001\u6307\u4ee4\u88ab\u9519\u8bef\u6295\u9012；\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u5219\u662f\u4e13\u95e8\u7528\u6765\u81ea\u52a8\u6e05\u7406\u4e3b\u9898\u4e0b\u7684\u5386\u53f2\u72b6\u6001\u5feb\u7167，\u65e0\u9700\u624b\u52a8\u53d1\u9001\u7a7a\u6d88\u606f\u5220\u9664\u65e7\u4fdd\u7559\u6d88\u606f，\u9632\u6b62\u670d\u52a1\u7aef\u5b58\u50a8\u88ab\u5927\u91cf\u8fc7\u65f6\u7684\u4e3b\u9898<\/p>\n

    \u4e03\u3001\u603b\u7ed3<\/h3>\n

    MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u662f MQTT 5.0 \u534f\u8bae\u7684\u91cd\u8981\u7279\u6027，\u5408\u7406\u4f7f\u7528\u80fd\u663e\u8457\u63d0\u5347\u7cfb\u7edf\u53ef\u9760\u6027\u548c\u8d44\u6e90\u5229\u7528\u7387：<\/p>\n

    📌 \u6838\u5fc3\u4ef7\u503c<\/p>\n

      \n
    • \u81ea\u52a8\u8d44\u6e90\u7ba1\u7406：\u907f\u514d\u8fc7\u65f6\u6570\u636e\u957f\u671f\u5360\u7528\u670d\u52a1\u7aef\u5b58\u50a8，\u81ea\u52a8\u91ca\u653e\u5185\u5b58\u548c\u78c1\u76d8\u7a7a\u95f4<\/li>\n
    • \u6570\u636e\u65f6\u6548\u4fdd\u969c：\u786e\u4fdd\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u7684\u90fd\u662f\u6709\u6548\u7684\u6700\u65b0\u72b6\u6001\u6570\u636e，\u907f\u514d\u4f20\u9012\u65e0\u6548\u5386\u53f2\u4fe1\u606f<\/li>\n
    • \u4e1a\u52a1\u98ce\u9669\u63a7\u5236：\u9632\u6b62\u5931\u6548\u6307\u4ee4\u5ef6\u8fdf\u6267\u884c，\u964d\u4f4e\u8bbe\u5907\u8bef\u64cd\u4f5c\u7b49\u5b89\u5168\u98ce\u9669<\/li>\n<\/ul>\n

      \u2699\ufe0f \u914d\u7f6e\u8981\u70b9<\/p>\n

        \n
      • \u5ba2\u6237\u7aef\u4f18\u5148：\u5ba2\u6237\u7aef\u5355\u6761\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u4f18\u5148\u7ea7\u9ad8\u4e8e\u670d\u52a1\u7aef\u5168\u5c40\u914d\u7f6e<\/li>\n
      • \u7075\u6d3b\u914d\u7f6e：\u53ef\u901a\u8fc7 PUBLISH \u62a5\u6587\u7684 message-expiry-interval \u5b57\u6bb5\u6216\u670d\u52a1\u7aef\u540e\u53f0\u8fdb\u884c\u8bbe\u7f6e<\/li>\n
      • \u65f6\u6548\u4f20\u9012：\u5728\u96c6\u7fa4\u548c\u6865\u63a5\u573a\u666f\u4e2d，\u5269\u4f59\u8fc7\u671f\u95f4\u9694\u4f1a\u968f\u6d88\u606f\u540c\u6b65\u4f20\u9012，\u4fdd\u8bc1\u6574\u6761\u94fe\u8def\u611f\u77e5\u65f6\u6548\u6027<\/li>\n<\/ul>\n

        💡 \u4f7f\u7528\u5efa\u8bae<\/p>\n

          \n
        • \u6309\u4e1a\u52a1\u8c03\u6574：\u4f4e\u9891\u6570\u636e\u53ef\u8bbe\u8f83\u957f\u6709\u6548\u671f，\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u6570\u636e\u5e94\u8bbe\u8f83\u77ed\u8fc7\u671f\u65f6\u95f4<\/li>\n
        • \u907f\u514d\u65e0\u9650\u7559\u5b58：\u4e0d\u8981\u65e0\u9650\u5236\u7559\u5b58\u5927\u91cf\u6c38\u4e45\u6709\u6548\u7684\u4fdd\u7559\u6d88\u606f，\u4ee5\u514d\u5f71\u54cd\u96c6\u7fa4\u6027\u80fd<\/li>\n
        • \u7ed3\u5408\u6301\u4e45\u5316：\u9700\u8981\u957f\u671f\u5b58\u50a8\u7684\u5173\u952e\u6570\u636e\u5e94\u540c\u6b65\u81f3\u6570\u636e\u5e93，\u800c\u975e\u4f9d\u8d56 MQTT \u4fdd\u7559\u6d88\u606f<\/li>\n
        • \u76d1\u63a7\u4e0e\u6e05\u7406：\u5b9a\u671f\u68c0\u67e5\u4fdd\u7559\u6d88\u606f\u4f7f\u7528\u60c5\u51b5，\u5408\u7406\u914d\u7f6e\u5b9a\u65f6\u6e05\u7406\u673a\u5236<\/li>\n<\/ul>\n

          \u901a\u8fc7\u5408\u7406\u914d\u7f6e\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4，\u53ef\u4ee5\u5728\u4fdd\u969c\u6570\u636e\u65f6\u6548\u6027\u7684\u540c\u65f6，\u4f18\u5316\u7cfb\u7edf\u8d44\u6e90\u4f7f\u7528，\u6784\u5efa\u66f4\u5065\u58ee\u7684 MQTT \u7269\u8054\u7f51\u5e94\u7528\u67b6\u6784\u3002
          \n\u72b6\u6001\u6570\u636e\u5360\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

          \u524d\u8a00
          \nMQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u80fd\u81ea\u52a8\u6e05\u7406\u670d\u52a1\u7aef\u8fc7\u65f6\u6570\u636e，\u786e\u4fdd\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u6709\u6548\u6700\u65b0\u72b6\u6001\u3002
          \n\u4e00\u3001MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u7b80\u4ecb\u4fdd\u7559\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u662fMQTT 5.0\u534f\u8bae\u4e2d\u7528\u4e8e\u63a7\u5236\u670d\u52a1\u7aef\u4fdd\u7559\u6d88\u606f\u751f\u547d\u5468\u671f\u7684\u6838\u5fc3\u7279\u6027，\u5b83\u53ef\u4ee5\u907f\u514d\u8fc7\u65f6\u7684\u5386\u53f2\u6570\u636e\u957f\u671f\u5360\u7528\u670d\u52a1\u7aef\u5b58\u50a8\u8d44\u6e90，\u540c\u65f6\u4fdd\u969c\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u5230\u7684\u59cb\u7ec8\u662f\u6709\u6548\u7684\u6700\u65b0\u6570\u636e\u3002
          \n🔍 \u6838\u5fc3\u673a\u5236\u8bf4\u660e
          \n\u200c\u57fa\u7840\u5b9a\u4e49\u200c
          \n\u8be5\u7279\u6027\u901a\u8fc7message-expiry-interval\u5b57\u6bb5\u5b9e\u73b0，\u4ee5\u79d2\u4e3a<\/p>\n","protected":false},"author":2,"featured_media":90496,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[320],"topic":[],"class_list":["post-90506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-mqtt"],"yoast_head":"\n\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/90506.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u524d\u8a00 MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u80fd\u81ea\u52a8\u6e05\u7406\u670d\u52a1\u7aef\u8fc7\u65f6\u6570\u636e，\u786e\u4fdd\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u6709\u6548\u6700\u65b0\u72b6\u6001\u3002 \u4e00\u3001MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u7b80\u4ecb\u4fdd\u7559\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u662fMQTT 5.0\u534f\u8bae\u4e2d\u7528\u4e8e\u63a7\u5236\u670d\u52a1\u7aef\u4fdd\u7559\u6d88\u606f\u751f\u547d\u5468\u671f\u7684\u6838\u5fc3\u7279\u6027，\u5b83\u53ef\u4ee5\u907f\u514d\u8fc7\u65f6\u7684\u5386\u53f2\u6570\u636e\u957f\u671f\u5360\u7528\u670d\u52a1\u7aef\u5b58\u50a8\u8d44\u6e90，\u540c\u65f6\u4fdd\u969c\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u5230\u7684\u59cb\u7ec8\u662f\u6709\u6548\u7684\u6700\u65b0\u6570\u636e\u3002 🔍 \u6838\u5fc3\u673a\u5236\u8bf4\u660e \u200c\u57fa\u7840\u5b9a\u4e49\u200c \u8be5\u7279\u6027\u901a\u8fc7message-expiry-interval\u5b57\u6bb5\u5b9e\u73b0，\u4ee5\u79d2\u4e3a\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/90506.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T04:17:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260805041720-6a72b9504ff4d.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/90506.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/90506.html\",\"name\":\"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-08-05T04:17:28+00:00\",\"dateModified\":\"2026-08-05T04:17:28+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/90506.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/90506.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/90506.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/90506.html","og_locale":"zh_CN","og_type":"article","og_title":"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u524d\u8a00 MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u80fd\u81ea\u52a8\u6e05\u7406\u670d\u52a1\u7aef\u8fc7\u65f6\u6570\u636e，\u786e\u4fdd\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u6709\u6548\u6700\u65b0\u72b6\u6001\u3002 \u4e00\u3001MQTT \u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4\u7b80\u4ecb\u4fdd\u7559\u6d88\u606f\u7684\u8fc7\u671f\u65f6\u95f4\u662fMQTT 5.0\u534f\u8bae\u4e2d\u7528\u4e8e\u63a7\u5236\u670d\u52a1\u7aef\u4fdd\u7559\u6d88\u606f\u751f\u547d\u5468\u671f\u7684\u6838\u5fc3\u7279\u6027，\u5b83\u53ef\u4ee5\u907f\u514d\u8fc7\u65f6\u7684\u5386\u53f2\u6570\u636e\u957f\u671f\u5360\u7528\u670d\u52a1\u7aef\u5b58\u50a8\u8d44\u6e90，\u540c\u65f6\u4fdd\u969c\u65b0\u8ba2\u9605\u8005\u83b7\u53d6\u5230\u7684\u59cb\u7ec8\u662f\u6709\u6548\u7684\u6700\u65b0\u6570\u636e\u3002 🔍 \u6838\u5fc3\u673a\u5236\u8bf4\u660e \u200c\u57fa\u7840\u5b9a\u4e49\u200c \u8be5\u7279\u6027\u901a\u8fc7message-expiry-interval\u5b57\u6bb5\u5b9e\u73b0，\u4ee5\u79d2\u4e3a","og_url":"https:\/\/www.wsisp.com\/helps\/90506.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-08-05T04:17:28+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260805041720-6a72b9504ff4d.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"3 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/90506.html","url":"https:\/\/www.wsisp.com\/helps\/90506.html","name":"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-08-05T04:17:28+00:00","dateModified":"2026-08-05T04:17:28+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/90506.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/90506.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/90506.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u3010\u7b2c\u4e8c\u7ae011\u3011MQTT\u4fdd\u7559\u6d88\u606f\u8fc7\u671f\u65f6\u95f4"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/90506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=90506"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/90506\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/90496"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=90506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=90506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=90506"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=90506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}