【7.1.1】【rule】更新mac地址获取工具类

kernel-a-rule/src/main/java/cn/stylefeng/roses/kernel/rule/util/MacAddressUtil.java

@@ -0,0 +1,58 @@
+package cn.stylefeng.roses.kernel.rule.util;
+
+import java.net.InetAddress;
+import java.net.InterfaceAddress;
+import java.net.NetworkInterface;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * 获取mac地址的工具类
+ *
+ * @author fengshuonan
+ * @date 2020/11/13 12:59
+ */
+public class MacAddressUtil {
+
+    /**
+     * 获取mac的地址信息列表
+     * <p>
+     * 一台机器不一定有多个网卡，所以返回的是数组
+     *
+     * @author fengshuonan
+     * @date 2020/11/13 13:00
+     */
+    public static List<String> getMacList() throws Exception {
+        java.util.Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
+        StringBuilder sb = new StringBuilder();
+        ArrayList<String> tmpMacList = new ArrayList<>();
+        while (en.hasMoreElements()) {
+            NetworkInterface iface = en.nextElement();
+            List<InterfaceAddress> addrs = iface.getInterfaceAddresses();
+            for (InterfaceAddress addr : addrs) {
+                InetAddress ip = addr.getAddress();
+                NetworkInterface network = NetworkInterface.getByInetAddress(ip);
+                if (network == null) {
+                    continue;
+                }
+                byte[] mac = network.getHardwareAddress();
+                if (mac == null) {
+                    continue;
+                }
+                sb.delete(0, sb.length());
+                for (int i = 0; i < mac.length; i++) {
+                    sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
+                }
+                tmpMacList.add(sb.toString());
+            }
+        }
+        if (tmpMacList.size() <= 0) {
+            return tmpMacList;
+        }
+
+        // 去重，同一个网卡的ipv4,ipv6得到的mac都是一样的
+        return tmpMacList.stream().distinct().collect(Collectors.toList());
+    }
+
+}