优化部分代码

src/main/java/com/lion/sns/service/CommunicateService.java

@@ -431,11 +431,14 @@ public class CommunicateService {
                 DynamicConfigMessage dynamicConfigMessage = new DynamicConfigMessage();
                 dynamicConfigMessage.removeIp(id.get());
                 dynamicConfigNotify(dynamicConfigMessage);
+                ips.remove(id.get());
 
                 Site site = siteMapper.selectSiteById(id.get());
+                //删除服务器后，服务器下线的场景，这时已从mapper删除
+                if(site == null)
+                    return;
                 webSocketService.statusAlter(site.getHostname(), false);
                 siteMapper.updateLastOnlineTime(id.get(), new Date());
-                ips.remove(id.get());
             }
         }
     }

src/main/java/com/lion/sns/util/IoUtil.java

@@ -59,16 +59,13 @@ public class IoUtil {
         globalMemory = OshiUtil.getMemory();
 
         for (NetworkIF nif : networkIFs)
-            if(SystemUtil.getOsInfo().isLinux()) {
-                if (nif.getName().equals("eth0") || nif.getName().equals("ens3"))
-                    networkIF = nif;
+            if (nif.getName().startsWith("eth") || nif.getName().startsWith("ens")) {
+                networkIF = nif;
+                break;
             }
-            else
-                if(nif.getName().equals("ethernet_32769"))
-                    networkIF = nif;
 
         if(networkIF == null)
-            log.error("网卡 eth0 不存在");
+            log.error("网卡 不存在");
         else{
             send = networkIF.getBytesSent();
             receive = networkIF.getBytesRecv();