{"id":31259,"date":"2022-12-11T11:51:27","date_gmt":"2023-10-31T00:48:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e7%9a%84-mqtt-%e5%ae%a2%e6%88%b7%e7%ab%af\/"},"modified":"2025-08-12T23:06:40","modified_gmt":"2025-08-12T15:06:40","slug":"java-%e7%9a%84-mqtt-%e5%ae%a2%e6%88%b7%e7%ab%af","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e7%9a%84-mqtt-%e5%ae%a2%e6%88%b7%e7%ab%af\/","title":{"rendered":"Java \u7684 MQTT \u5ba2\u6237\u7aef"},"content":{"rendered":"

\u8fd9\u662f\u4e00\u4e2aJava MQTT\u5ba2\u6237\u7aef\u7684\u793a\u4f8b\u3002<\/p>\n

\u7ecf\u7eaa\u4eba\uff1aexample.com
\n\u4e3b\u9898\uff1aM5Stack<\/p><\/blockquote>\n

\u4e0b\u8f7d jar \u6587\u4ef6<\/p>\n
wget https:\/\/repo1.maven.org\/maven2\/org\/eclipse\/paho\/org.eclipse.paho.client.mqttv3\/1.2.5\/org.eclipse.paho.client.mqttv3-1.2.5.jar\r\n<\/code><\/pre>\n
\u51fa\u7248\u7684\u4f8b\u5b50<\/p>\n
\/\/ -----------------------------------------------------------------------<\/span>\r\n\/*\r\n\tMqttPublishSample.java\r\n\r\n\t\t\t\t\t\tFeb\/10\/2023\r\n*\/<\/span>\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttClient<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttConnectOptions<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttException<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttMessage<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.persist.MemoryPersistence<\/span>;<\/span>\r\n\r\nimport<\/span>  java.util.Date<\/span>;<\/span>\r\nimport<\/span>  java.text.DateFormat<\/span>;<\/span>\r\nimport<\/span>  java.text.SimpleDateFormat<\/span>;<\/span>\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\npublic<\/span> class<\/span> MqttPublishSample<\/span>\r\n{<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span>\r\n{<\/span>\r\n\tString<\/span> topic<\/span>\t\t=<\/span> \"M5Stack\"<\/span>;<\/span>\r\n\tString<\/span> content<\/span>\t  =<\/span> \"\u3053\u3093\u306b\u3061\u306f from MqttPublishSample\\n\"<\/span>;<\/span>\r\n\r\n\tDate<\/span> ddx<\/span> =<\/span> new<\/span> Date<\/span> ();<\/span>\r\n\tDateFormat<\/span> dfm<\/span> =<\/span> new<\/span> SimpleDateFormat<\/span> (<\/span>\"yyyy-MM-dd\"<\/span>);<\/span>\r\n\tString<\/span>  str_ddx<\/span> =<\/span> dfm<\/span>.<\/span>format<\/span> (<\/span>ddx<\/span>);<\/span>\r\n\r\n\tcontent<\/span> +=<\/span> str_ddx<\/span>;<\/span>\r\n\r\n\tint<\/span> qos<\/span>\t\t\t =<\/span> 2<\/span>;<\/span>\r\n\tString<\/span> broker<\/span>\t   =<\/span> \"tcp:\/\/example.com:1883\"<\/span>;<\/span>\r\n\tString<\/span> clientId<\/span>\t =<\/span> \"JavaSample\"<\/span>;<\/span>\r\n\tMemoryPersistence<\/span> persistence<\/span> =<\/span> new<\/span> MemoryPersistence<\/span>();<\/span>\r\n\r\n\tSystem<\/span>.<\/span>err<\/span>.<\/span>println<\/span> (<\/span>\"*** \u958b\u59cb ***\"<\/span>);<\/span>\r\n\r\n\ttry<\/span> {<\/span>\r\n\t\tMqttClient<\/span> sampleClient<\/span> =<\/span> new<\/span> MqttClient<\/span>(<\/span>broker<\/span>,<\/span> clientId<\/span>,<\/span> persistence<\/span>);<\/span>\r\n\t\tMqttConnectOptions<\/span> connOpts<\/span> =<\/span> new<\/span> MqttConnectOptions<\/span>();<\/span>\r\n\t\tconnOpts<\/span>.<\/span>setCleanSession<\/span>(<\/span>true<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Connecting to broker: \"<\/span>+<\/span>broker<\/span>);<\/span>\r\n\t\tsampleClient<\/span>.<\/span>connect<\/span>(<\/span>connOpts<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Connected\"<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Publishing message: \"<\/span>+<\/span>content<\/span>);<\/span>\r\n\t\tMqttMessage<\/span> message<\/span> =<\/span> new<\/span> MqttMessage<\/span>(<\/span>content<\/span>.<\/span>getBytes<\/span>());<\/span>\r\n\t\tmessage<\/span>.<\/span>setQos<\/span>(<\/span>qos<\/span>);<\/span>\r\n\t\tsampleClient<\/span>.<\/span>publish<\/span>(<\/span>topic<\/span>,<\/span> message<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Message published\"<\/span>);<\/span>\r\n\t\tsampleClient<\/span>.<\/span>disconnect<\/span>();<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Disconnected\"<\/span>);<\/span>\r\n\/\/\t  System.exit(0);<\/span>\r\n\t\t}<\/span> catch<\/span>(<\/span>MqttException<\/span> me<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"reason \"<\/span>+<\/span>me<\/span>.<\/span>getReasonCode<\/span>());<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"msg \"<\/span>+<\/span>me<\/span>.<\/span>getMessage<\/span>());<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"loc \"<\/span>+<\/span>me<\/span>.<\/span>getLocalizedMessage<\/span>());<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"cause \"<\/span>+<\/span>me<\/span>.<\/span>getCause<\/span>());<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"excep \"<\/span>+<\/span>me<\/span>);<\/span>\r\n\t\tme<\/span>.<\/span>printStackTrace<\/span>();<\/span>\r\n\t\t}<\/span>\r\n\r\n\tSystem<\/span>.<\/span>err<\/span>.<\/span>println<\/span> (<\/span>\"*** \u7d42\u4e86 ***\"<\/span>);<\/span>\r\n}<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\n}<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\n<\/code><\/pre>\n
export JAR=..\/jar\r\nMqttPublishSample.class: MqttPublishSample.java\r\n\tjavac -cp $(JAR)\/org.eclipse.paho.client.mqttv3-1.2.5.jar MqttPublishSample.java\r\nclean:\r\n\trm -f *.class\r\n<\/code><\/pre>\n
\u7f16\u8bd1<\/p>\n
make\r\n<\/code><\/pre>\n
\u8fd0\u884c\u811a\u672c<\/p>\n
export <\/span>JAR<\/span>=<\/span>..\/jar\r\nexport <\/span>CLASSPATH<\/span>=<\/span>.:$JAR<\/span>\/org.eclipse.paho.client.mqttv3-1.2.5.jar\r\njava MqttPublishSample\r\n<\/code><\/pre>\n
\u8ba2\u9605\u7684\u4f8b\u5b50<\/p>\n
\/\/ -----------------------------------------------------------------------<\/span>\r\n\/*\r\n\tPahoSubscribe.java\r\n\r\n\t\t\t\t\t\tFeb\/10\/2023\r\n*\/<\/span>\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.IMqttDeliveryToken<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttCallback<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttClient<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttException<\/span>;<\/span>\r\nimport<\/span> org.eclipse.paho.client.mqttv3.MqttMessage<\/span>;<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\npublic<\/span> class<\/span> PahoSubscribe<\/span> implements<\/span> MqttCallback<\/span> {<\/span>\r\n\r\nMqttClient<\/span> client<\/span>;<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\npublic<\/span> PahoSubscribe<\/span>()<\/span> {<\/span>\r\n}<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span>\r\n{<\/span>\r\n\tSystem<\/span>.<\/span>err<\/span>.<\/span>println<\/span> (<\/span>\"*** \u958b\u59cb ***\"<\/span>);<\/span>\r\n\tnew<\/span> PahoSubscribe<\/span>().<\/span>doDemo<\/span>();<\/span>\r\n}<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\npublic<\/span> void<\/span> doDemo<\/span>()<\/span> {<\/span>\r\n    try<\/span> {<\/span>\r\n\tString<\/span> broker<\/span> =<\/span> \"tcp:\/\/example.com:1883\"<\/span>;<\/span>\r\n\tString<\/span> topic<\/span> =<\/span> \"M5Stack\"<\/span>;<\/span>\r\n\tclient<\/span> =<\/span> new<\/span> MqttClient<\/span>(<\/span>broker<\/span>,<\/span> \"Sending\"<\/span>);<\/span>\r\n\tclient<\/span>.<\/span>connect<\/span>();<\/span>\r\n\tclient<\/span>.<\/span>setCallback<\/span>(<\/span>this<\/span>);<\/span>\r\n\tclient<\/span>.<\/span>subscribe<\/span>(<\/span>topic<\/span>);<\/span>\r\n\t}<\/span> catch<\/span> (<\/span>MqttException<\/span> ee<\/span>)<\/span> {<\/span>\r\n\t\tee<\/span>.<\/span>printStackTrace<\/span>();<\/span>\r\n\t\tSystem<\/span>.<\/span>err<\/span>.<\/span>println<\/span> (<\/span>\"*** error ***\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\n@Override<\/span>\r\npublic<\/span> void<\/span> connectionLost<\/span>(<\/span>Throwable<\/span> cause<\/span>)<\/span> {<\/span>\r\n    \/\/ TODO Auto-generated method stub<\/span>\r\n\r\n}<\/span>\r\n\r\n@Override<\/span>\r\npublic<\/span> void<\/span> messageArrived<\/span>(<\/span>String<\/span> topic<\/span>,<\/span> MqttMessage<\/span> message<\/span>)<\/span>\r\n        throws<\/span> Exception<\/span> {<\/span>\r\n\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>message<\/span>);<\/span>   \r\n}<\/span>\r\n\r\n@Override<\/span>\r\npublic<\/span> void<\/span> deliveryComplete<\/span>(<\/span>IMqttDeliveryToken<\/span> token<\/span>)<\/span> {<\/span>\r\n    \/\/ TODO Auto-generated method stub<\/span>\r\n\r\n}<\/span>\r\n\r\n}<\/span>\r\n\/\/ -----------------------------------------------------------------------<\/span>\r\n<\/code><\/pre>\n
export JAR=..\/jar\r\nPahoSubscribe.class: PahoSubscribe.java\r\n\tjavac -cp $(JAR)\/org.eclipse.paho.client.mqttv3-1.2.5.jar PahoSubscribe.java\r\nclean:\r\n\trm -f *.class\r\n<\/code><\/pre>\n
\u7f16\u8bd1<\/p>\n
make\r\n<\/code><\/pre>\n
\u6267\u884c\u811a\u672c (sh\u00ed su\u012b p\u01d0)<\/p>\n
export <\/span>JAR<\/span>=<\/span>..\/jar\r\nexport <\/span>CLASSPATH<\/span>=<\/span>.:$JAR<\/span>\/org.eclipse.paho.client.mqttv3-1.2.5.jar\r\njava PahoSubscribe\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u8fd9\u662f\u4e00\u4e2aJava MQTT\u5ba2\u6237\u7aef\u7684\u793a\u4f8b\u3002 \u7ecf\u7eaa\u4eba\uff1aexample.com \u4e3b\u9898\uff1aM5Stack \u4e0b\u8f7d jar  […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31259","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\nJava \u7684 MQTT \u5ba2\u6237\u7aef - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8eJava \u7684 MQTT \u5ba2\u6237\u7aef\u7684\u6280\u672f\u6587\u7ae0\" \/>\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.silicloud.com\/zh\/blog\/java-\u7684-mqtt-\u5ba2\u6237\u7aef\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java \u7684 MQTT \u5ba2\u6237\u7aef\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8eJava \u7684 MQTT \u5ba2\u6237\u7aef\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java-\u7684-mqtt-\u5ba2\u6237\u7aef\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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