多网IP探测-过滤无网关网卡

src/main/java/com/tongran/agent/client/utils/AgentUtil.java

@@ -251,6 +251,9 @@ public class AgentUtil {
         return swapped;
     }
 
+    // 存储网关信息：接口名 -> 网关IP
+    private static Map<String, String> gatewayMap = new HashMap<>();
+
     // 正则表达式匹配：当前 IP：xxx.xxx.xxx.xxx 来自于：中国 江苏省 南京市 电信
     private static final String REGEX = "来自于：(\\S+)\\s+(\\S+)\\s+(\\S+)\\s+(\\S+)";
     /**
@@ -280,6 +283,12 @@ public class AgentUtil {
             String name = ni.getName();
             if (!isEthernetInterface(name)) continue;
 
+            // 检查是否“已连接”（物理链路状态）
+            if (!isInterfaceConnected(name)) continue;
+
+            // 检查IP4信息
+            if (getIPv4Address(ni).equals("N/A")) continue;
+
             NetworkInterfaceInfo info = NetworkInterfaceInfo.builder()
                     .name(name)
                     .type("Ethernet")
@@ -390,6 +399,42 @@ public class AgentUtil {
         return "N/A";
     }
 
+    // 检查接口是否“已连接”（物理链路状态）
+    private static boolean isInterfaceConnected(String interfaceName) {
+        try {
+            String os = System.getProperty("os.name").toLowerCase();
+            Process process;
+
+            if (os.contains("win")) {
+                // Windows: 使用 wmic 检查网卡是否启用
+                process = Runtime.getRuntime().exec(
+                        "wmic nic where \"NetEnabled=true\" get Name");
+            } else {
+                // Linux: 检查 operstate
+                process = Runtime.getRuntime().exec(
+                        "cat /sys/class/net/" + interfaceName + "/operstate");
+            }
+
+            BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream()));
+            String line;
+            while ((line = reader.readLine()) != null) {
+                if (os.contains("win")) {
+                    if (line.trim().equalsIgnoreCase(interfaceName)) {
+                        return true;
+                    }
+                } else {
+                    return "up".equals(line.trim());
+                }
+            }
+            reader.close();
+            return false;
+        } catch (Exception e) {
+            System.err.println("无法检查接口状态: " + interfaceName);
+            return false; // 保守处理
+        }
+    }
+
     /**
      * 获取公网 IP
      */