springboot整合mqtt的步骤示例详解_Java

使用场景：
mqtt可用于消息发送接收，一方面完成系统解耦，一方面可用于物联网设备的数据采集和指令控制
话不多说，下面直接干货

1、引入依赖包

        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-integration</artifactid>
        </dependency>
        <dependency>
            <groupid>org.springframework.integration</groupid>
            <artifactid>spring-integration-stream</artifactid>
        </dependency>
        <dependency>
            <groupid>org.springframework.integration</groupid>
            <artifactid>spring-integration-mqtt</artifactid>
        </dependency>
        <dependency>
            <groupid>com.fasterxml.jackson.core</groupid>
            <artifactid>jackson-databind</artifactid>
        </dependency>

2、yml配置

若需要搭建mqtt服务教程，留言我下期出哦！

spring:
  application:
    name: device-control
  profiles:
    active: local
device:
  mqtt:
    enable: true
    username: admin
    password: 123456
    host-url: tcp://192.168.1.12:1883         # mqtt服务连接tcp地址
    in-client-id: ${random.value}              # 随机值，使出入站 client id 不同
    out-client-id: ${random.value}
    client-id: ${random.int}                   # 客户端id，不能相同，采用随机数 ${random.value}
    default-topic: pubdevice                      # 默认主题
    timeout: 60                                # 超时时间
    keepalive: 60                              # 保持连接
    clearsession: true                         # 清除会话(设置为false,断开连接，重连后使用原来的会话 保留订阅的主题，能接收离线期间的消息)

3、创建配置

创建mqttautoconfiguration

import org.eclipse.paho.client.mqttv3.mqttconnectoptions;
import org.springframework.boot.autoconfigure.autoconfiguration;
import org.springframework.boot.autoconfigure.condition.conditionalonproperty;
import org.springframework.context.annotation.bean;
import org.springframework.integration.annotation.integrationcomponentscan;
import org.springframework.integration.channel.executorchannel;
import org.springframework.integration.dsl.integrationflow;
import org.springframework.integration.dsl.integrationflows;
import org.springframework.integration.mqtt.core.defaultmqttpahoclientfactory;
import org.springframework.integration.mqtt.core.mqttpahoclientfactory;
import org.springframework.integration.mqtt.inbound.mqttpahomessagedrivenchanneladapter;
import org.springframework.integration.mqtt.outbound.mqttpahomessagehandler;
import org.springframework.integration.mqtt.support.defaultpahomessageconverter;
import org.springframework.scheduling.concurrent.threadpooltaskexecutor;
import javax.annotation.resource;
import java.util.concurrent.threadpoolexecutor;
@autoconfiguration
@conditionalonproperty(value = "device.mqtt.enable", havingvalue = "true")
@integrationcomponentscan
public class mqttautoconfiguration {
    @resource
    mqttproperties mqttproperties;
    @resource
    mqttmessagehandle mqttmessagehandle;
    /**
     * mqtt 客户端工厂 所有客户端从这里产生
     * @return
     */
    @bean
    public mqttpahoclientfactory mqttpahoclientfactory(){
        defaultmqttpahoclientfactory factory = new defaultmqttpahoclientfactory();
        mqttconnectoptions options = new mqttconnectoptions();
        options.setserveruris(mqttproperties.gethosturl().split(","));
        options.setusername(mqttproperties.getusername());
        options.setpassword(mqttproperties.getpassword().tochararray());
        factory.setconnectionoptions(options);
        return factory;
    }
    /**
     * mqtt 管道适配器
     * @param factory
     * @return
     */
    @bean
    public mqttpahomessagedrivenchanneladapter adapter(mqttpahoclientfactory factory){
        return new mqttpahomessagedrivenchanneladapter(mqttproperties.getinclientid(),factory,mqttproperties.getdefaulttopic().split(","));
    }
    /**
     * 消息生产者 (接收,处理来自mqtt的消息)
     * @param adapter
     * @return
     */
    @bean
    public integrationflow mqttinbound(mqttpahomessagedrivenchanneladapter adapter) {
        adapter.setcompletiontimeout(5000);
        adapter.setqos(1);
        return integrationflows.from( adapter)
                .channel(new executorchannel(mqttthreadpooltaskexecutor()))
                .handle(mqttmessagehandle)
                .get();
    }
    @bean
    public threadpooltaskexecutor mqttthreadpooltaskexecutor() {
        threadpooltaskexecutor executor = new threadpooltaskexecutor();
        // 最大可创建的线程数
        int maxpoolsize = 200;
        executor.setmaxpoolsize(maxpoolsize);
        // 核心线程池大小
        int corepoolsize = 50;
        executor.setcorepoolsize(corepoolsize);
        // 队列最大长度
        int queuecapacity = 1000;
        executor.setqueuecapacity(queuecapacity);
        // 线程池维护线程所允许的空闲时间
        int keepaliveseconds = 300;
        executor.setkeepaliveseconds(keepaliveseconds);
        // 线程池对拒绝任务(无线程可用)的处理策略
        executor.setrejectedexecutionhandler(new threadpoolexecutor.callerrunspolicy());
        executor.initialize();
        return executor;
    }
    /**
     * 出站处理器 (向 mqtt 发送消息)
     * @param factory
     * @return
     */
    @bean
    public integrationflow mqttoutboundflow(mqttpahoclientfactory factory) {
        mqttpahomessagehandler handler = new mqttpahomessagehandler(mqttproperties.getoutclientid(),factory);
        handler.setasync(true);
        handler.setconverter(new defaultpahomessageconverter());
        handler.setdefaulttopic(mqttproperties.getdefaulttopic().split(",")[0]);
        return integrationflows.from( "mqttoutboundchannel").handle(handler).get();
    }
}

创建mqttgateway

import org.springframework.boot.autoconfigure.condition.conditionalonproperty;
import org.springframework.context.annotation.lazy;
import org.springframework.integration.annotation.messaginggateway;
import org.springframework.integration.mqtt.support.mqttheaders;
import org.springframework.messaging.handler.annotation.header;
import org.springframework.stereotype.component;
@component
@lazy
@conditionalonproperty(value = "device.mqtt.enable", havingvalue = "true")
@messaginggateway(defaultrequestchannel = "mqttoutboundchannel")
public interface mqttgateway {
    /**
     * @param topic string
     * @param data  string
     * @return void
     * @throws
     * @description <description you method purpose>
     * @author lwt
     * @time 2024/1/24 09:29
     */
    void sendtomqtt(@header(mqttheaders.topic) string topic, string data);
    /**
     * @param topic string
     * @param qos   integer
     * @param data  string
     * @return void
     * @throws
     * @description <description you method purpose>
     * @author lwt
     * @time 2024/1/24 09:31
     */
    void sendtomqtt(@header(mqttheaders.topic) string topic, @header(mqttheaders.qos) integer qos, string data);
}

创建mqttmessagehandle

import cn.hutool.extra.spring.springutil;
import lombok.extern.slf4j.slf4j;
import org.springframework.boot.autoconfigure.autoconfiguration;
import org.springframework.messaging.message;
import org.springframework.messaging.messagehandler;
import org.springframework.messaging.messagingexception;
import java.lang.reflect.invocationtargetexception;
import java.lang.reflect.method;
import java.util.map;
@slf4j
@autoconfiguration
public class mqttmessagehandle implements messagehandler {
    public static map<string, object> mqttservices;
    @override
    public void handlemessage(message<?> message) throws messagingexception {
        getmqtttopicservice(message);
    }
    public map<string, object> getmqttservices() {
        if (mqttservices == null) {
            mqttservices = springutil.getconfigurablebeanfactory().getbeanswithannotation(mqttservice.class);
        }
        return mqttservices;
    }
    public void getmqtttopicservice(message<?> message) {
        // 在这里 我们根据不同的 主题 分发不同的消息
        string receivedtopic = message.getheaders().get("mqtt_receivedtopic", string.class);
        if (receivedtopic == null || "".equals(receivedtopic)) {
            return;
        }
        //updatetopicstatus(receivedtopic);
        for (map.entry<string, object> entry : getmqttservices().entryset()) {
            // 把所有带有 @mqttservice 的类遍历
            class<?> clazz = entry.getvalue().getclass();
            // 获取他所有方法
            method[] methods = clazz.getsuperclass().getdeclaredmethods();
            for (method method : methods) {
                if (method.isannotationpresent(mqtttopic.class)) {
                    // 如果这个方法有 这个注解
                    mqtttopic handletopic = method.getannotation(mqtttopic.class);
                    if (ismatch(receivedtopic, handletopic.value())) {
                        // 并且 这个 topic 匹配成功
                        try {
                            method.invoke(springutil.getbean(clazz),receivedtopic, message);
                            return;
                        } catch (illegalaccessexception e) {
                            e.printstacktrace();
                            log.error("代理炸了");
                        } catch (invocationtargetexception e) {
                            log.error("执行 {} 方法出现错误", handletopic.value(), e);
                        }
                    }
                }
            }
        }
    }
    /**
     * mqtt 订阅的主题与我实际的主题是否匹配
     * @param topic   是实际的主题
     * @param pattern 是我订阅的主题 可以是通配符模式
     * @return 是否匹配
     */
    public static boolean ismatch(string topic, string pattern) {
        if ((topic == null) || (pattern == null)) {
            return false;
        }
        if (topic.equals(pattern)) {
            // 完全相等是肯定匹配的
            return true;
        }
        if ("#".equals(pattern)) {
            // # 号代表所有主题  肯定匹配的
            return true;
        }
        string[] splittopic = topic.split("_");
        string[] splitpattern = pattern.split("_");
        boolean match = true;
        // 如果包含 # 则只需要判断 # 前面的
        for (int i = 0; i < splitpattern.length; i++) {
            if (!"#".equals(splitpattern[i])) {
                // 不是# 号 正常判断
                if (i >= splittopic.length) {
                    // 此时长度不相等 不匹配
                    match = false;
                    break;
                }
                if (!splittopic[i].equals(splitpattern[i]) && !"+".equals(splitpattern[i])) {
                    // 不相等 且不等于 +
                    match = false;
                    break;
                }
            } else {
                // 是# 号  肯定匹配的
                break;
            }
        }
        return match;
    }
}

创建mqttproperties

import lombok.data;
import org.springframework.boot.autoconfigure.autoconfiguration;
import org.springframework.boot.context.properties.configurationproperties;
@configurationproperties(prefix = "device.mqtt")
@data
@autoconfiguration
public class mqttproperties {
    /**
     * 用户名
     */
    private string username;
    /**
     * 密码
     */
    private string password;
    /**
     * 连接地址
     */
    private string hosturl;
    /**
     * 进-客户id
     */
    private string inclientid;
    /**
     * 出-客户id
     */
    private string outclientid;
    /**
     * 客户id
     */
    private string clientid;
    /**
     * 默认连接话题
     */
    private string defaulttopic;
    /**
     * 超时时间
     */
    private int timeout;
    /**
     * 保持连接数
     */
    private int keepalive;
    /**是否清除session*/
    private boolean clearsession;
}

创建mqttconstants

public class mqttconstants {
    public static final string mqtt_device_info = "mqtt:device:info";
    public static final string topic_pub_device = "pubdevice";
    public static final string topic_sub_device = "subdevice";
}

创建初始化

import lombok.extern.slf4j.slf4j;
import org.springframework.boot.autoconfigure.condition.conditionalonproperty;
import org.springframework.stereotype.component;
import javax.annotation.postconstruct;
import javax.annotation.resource;
@slf4j
@component
@conditionalonproperty(value = "device.mqtt.enable", havingvalue = "true")
public class initmqttsubscribertopic {
    @resource
    mqttsubscriberservice mqttsubscriberservice;
    @postconstruct
    public void initsubscriber() {
        try {
            mqttsubscriberservice.addtopic(mqttconstants.topic_pub_device);
        } catch (exception e) {
            e.printstacktrace();
            throw new runtimeexception(e);
        }
    }
}

4、自定义注解

创建mqttservice

import org.springframework.core.annotation.aliasfor;
import org.springframework.stereotype.component;
import java.lang.annotation.*;
@documented
@target({elementtype.type})
@retention(retentionpolicy.runtime)
@component
public @interface mqttservice {
    @aliasfor(annotation = component.class)
    string value() default "";
}

创建mqtttopic

import java.lang.annotation.elementtype;
import java.lang.annotation.retention;
import java.lang.annotation.retentionpolicy;
import java.lang.annotation.target;
@target(elementtype.method)
@retention(retentionpolicy.runtime)
public @interface mqtttopic {
    /**
     * 主题名字
     */
    string value() default "";
}

创建如图：

6、使用示例

import cn.hutool.extra.spring.springutil;
import lombok.sneakythrows;
import lombok.extern.slf4j.slf4j;
import org.springframework.messaging.message;
import org.springframework.transaction.annotation.transactional;
@slf4j
@mqttservice
public class mqtttopichandle {
    /**
     * 监听到指定主题的消息
     * @param topic
     * @param message
     */
    @sneakythrows
    @mqtttopic("pubdevice")
    @transactional(rollbackfor = exception.class)
    public void receive(string topic, message<?> message) {
        log.info("message:{}", message.getpayload());
        string value = message.getpayload().tostring();
        // 进行逻辑处理
    }
    /**
     * 发送消息到指定主题
     * @param topic
     * @param message
     */
    @transactional(rollbackfor = exception.class)
    public boolean send(string topic, string message) {
        try {
            mqttgateway mqttgateway = springutil.getbean(mqttgateway.class);
            mqttgateway.sendtomqtt(topic,message);
        } catch (exception e){
            return false;
        }
        return true;
    }
}

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