判断mqtt客户端是否在线

iot-access/access-boot/src/main/java/com/njcn/access/utils/MqttUtil.java

@@ -0,0 +1,53 @@
+package com.njcn.access.utils;
+
+import com.alibaba.nacos.shaded.com.google.common.reflect.TypeToken;
+import com.alibaba.nacos.shaded.com.google.gson.Gson;
+import com.njcn.access.config.MqttInfo;
+import com.njcn.access.pojo.dto.mqtt.MqttClientDto;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import okhttp3.Credentials;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
+
+import java.io.IOException;
+import java.util.Objects;
+
+/**
+ * 类的介绍：
+ *
+ * @author xuyang
+ * @version 1.0.0
+ * @createTime 2023/7/14 14:44
+ */
+@Data
+@Order(100)
+@Configuration
+@AllArgsConstructor
+public class MqttUtil {
+
+    private final MqttInfo mqttInfo;
+
+    public boolean judgeClientOnline(String id) {
+        boolean result = false;
+        try {
+            Gson gson = new Gson();
+            OkHttpClient client = new OkHttpClient();
+            Request request = new Request.Builder()
+                    .url(mqttInfo.getUrl() + "/api/v5/clients/" + id)
+                    .header("Content-Type", "application/json")
+                    .header("Authorization", Credentials.basic(mqttInfo.getUserName(), mqttInfo.getPassword()))
+                    .build();
+            Response response = client.newCall(request).execute();
+            response.body();
+            MqttClientDto mqttClientDto = gson.fromJson(Objects.requireNonNull(response.body()).string(), new TypeToken<MqttClientDto>(){}.getType());
+            result = mqttClientDto.isConnected();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return result;
+    }
+}