MQTT 3 ——MQTT与Spring Mvc整合

本篇记录一下MQTT客户端与Spring Mvc整合

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  网络上已经有很多的MQTT客户端与SpringBoot整合的技术文档，但是与Spring Mvc框架的整合文档似乎并不太多，可能是因为SpringMvc框架已经逐渐被淘汰了。但很幸运，我这次JAVA后端项目就是用的SpringMvc,所以在整理了网上很多资料后，也为了方便其他后来人，把我这次的整合开发过程用文字记录一下。

POM引入依赖
  千万注意引入依赖的版本，一定要保持3个依赖的版本一致，不同的版本可能造成各种问题。
我在开发过程中碰到因为3个版本不一致，导致Class找不到的情况，所以对版本间区别不清楚的朋友们，就不要改版本。

<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-stream</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-core</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-mqtt</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>

resource目录下添加mqtt.properties配置文件

#用户名
mqtt.username=mqttPubClient
#密码
mqtt.password=123456
#是否清除会话
mqtt.cleanSession=false
#服务端url
mqtt.serverURI1=tcp://127.0.0.1:1883

mqtt.async=true
#超时时间
mqtt.completionTimeout=20000
#心跳
mqtt.keepAliveInterval=30
#客户端id
mqtt.clientId=mqttPubClient
#默认的消息服务质量
mqtt.defaultQos=1
#MQTT-监听的主题
mqtt.topic=hello

写Spring Mqtt 的配置XML
在resource目录下添加spring-mqtt.xml,要确保这个XML能被Spring启动时加载进去。

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4 xmlns:int="http://www.springframework.org/schema/integration"
 5 xmlns:context="http://www.springframework.org/schema/context"
 6 xmlns:int-mqtt="http://www.springframework.org/schema/integration/mqtt"
 7 xsi:schemaLocation="
 8 http://www.springframework.org/schema/integration
 9 http://www.springframework.org/schema/integration/spring-integration-4.1.xsd
10 http://www.springframework.org/schema/beans
11 http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
12 http://www.springframework.org/schema/integration/mqtt
13 http://www.springframework.org/schema/integration/mqtt/spring-integration-mqtt-4.1.xsd
14 http://www.springframework.org/schema/context
15 http://www.springframework.org/schema/context/spring-context-3.1.xsd ">
16
17 <context:property-placeholder location="classpath:mqtt.properties" ignore-unresolvable="true"/>
18
19 <!--MQTT配置-->
20 <bean id="clientFactory"
21 class="org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory">
22 <property name="userName" value="${mqtt.username}"/>
23 <property name="password" value="${mqtt.password}"/>
24 <property name="cleanSession" value="${mqtt.cleanSession}"/>
25 <property name="keepAliveInterval" value="${mqtt.keepAliveInterval}"/>
26 <property name="serverURIs">
27 <array>
28 <value>${mqtt.serverURI1}</value>
29 </array>
30 </property>
31 </bean>
32
33 <bean id="mqttHandler" class="org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler">
34 <constructor-arg name="clientId" value="${mqtt.clientId}"/>
35 <constructor-arg name="clientFactory" ref="clientFactory"/>
36 <property name="async" value="${mqtt.async}"/>
37 <property name="defaultQos" value="${mqtt.defaultQos}"/>
38 <property name="completionTimeout" value="${mqtt.completionTimeout}"/>
39 </bean>
40
41 <!-- 消息适配器 -->
42 <int-mqtt:message-driven-channel-adapter
43 id="mqttInbound" client-id="${mqtt.clientId}" url="${mqtt.serverURI1}"
44 topics="${mqtt.topic}" qos="${mqtt.defaultQos}" client-factory="clientFactory" auto-startup="true"
45 send-timeout="${mqtt.completionTimeout}" channel="startCase" />
46 <int:channel id="startCase" />
47 <!-- 消息处理类 -->
48 <int:service-activator id="handlerService"
49 input-channel="startCase" ref="mqttCaseService" method="handler" />
50
51 <!-- 消息处理 -->
52 <bean id="mqttCaseService" class="com.loong.mqtt.service.impl.MqttServiceImpl" />
53
54 </beans>

MQTT Service 接口

1 public interface MqttService {
2
3 public void send(String topic,String content) throws Exception;
4
5 public void handler(String message) throws Exception;
6 }

MQTT Service 实现

 1 import com.mqtt.service.MqttService;
 2 import lombok.extern.slf4j.Slf4j;
 3 import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
 4 import org.springframework.integration.mqtt.support.MqttHeaders;
 5 import org.springframework.integration.support.MessageBuilder;
 6 import org.springframework.messaging.Message;
 7 import org.springframework.stereotype.Service;
 8
 9 import javax.annotation.Resource;
10
11 @Service("MqttService")
12 @Slf4j
13 public class MqttServiceImpl implements MqttService {
14
15 @Resource
16 private MqttPahoMessageHandler mqttHandler;
17
18 @Override
19 public void send(String topic, String content) throws Exception {
20 // 构建消息
21 Message<String> messages =
22 MessageBuilder.withPayload(content).setHeader(MqttHeaders.TOPIC, topic).build();
23 // 发送消息
24 mqttHandler.handleMessage(messages);
25 }
26
27
28 @Override
29 public void handler(String message) throws Exception {
30 log.info("收到消息:"+message);
31 }
32 }
33 

MQTT Controller

 1 package com.loong.mqtt.controller;
 2
 3 import com.loong.api.model.ApiQueryOrderModel;
 4 import com.loong.kuaizhi.service.KuaizhiService;
 5 import com.loong.mqtt.service.MqttService;
 6 import com.loong.ysf.dto.Protocol;
 7 import com.loong.ysf.model.OrderInfo;
 8 import lombok.extern.slf4j.Slf4j;
 9 import org.jeecgframework.core.common.service.impl.RedisService;
10 import org.jeecgframework.core.util.ResourceUtil;
11 import org.springframework.beans.factory.annotation.Autowired;
12 import org.springframework.web.bind.annotation.*;
13
14 import javax.annotation.Resource;
15 import javax.servlet.http.HttpServletRequest;
16 import javax.servlet.http.HttpServletResponse;
17
18 /**
19  */
20 @RestController
21 @RequestMapping("/mqttController")
22 @Slf4j
23 public class MqttController {
24
25     @Resource(name = "MqttService")
26     private MqttService mqttService;
27
28     @RequestMapping(params = "testSend", method = RequestMethod.POST)
29     @ResponseBody
30     public String testSend(HttpServletRequest request, HttpServletResponse response) {
31         try {
32             String topic = ResourceUtil.getParameter("topic");
33             String content = ResourceUtil.getParameter("content");
34             this.mqttService.send(topic,content);
35         } catch (Exception ex) {
36             ex.printStackTrace();
37             log.error("发送失败", ex);
38         }
39
40         return "发送成功";
41     }
42 }

发送消息测试

• MQTTBOX先连上MQTT服务器，并订阅topic为hello的消息
• POSTMAN向mqttController.testSend接口发送请求，topic为hello,内容为{"hello":"200315"}
• MQTTBOX里面的订阅者收到消息
  

接收消息测试

• MQTTBOX创建一个消息发布者，发MQTT服务器发送topic为hello,内容为{"hello":"513002"}
  
  

   

• 项目后台日志输出订阅到的内容
  

作者：admin
原文地址：www.jiansword.com