新增获取网卡IP地址方法

hutool-system/src/main/java/cn/hutool/system/HostInfo.java

@@ -1,75 +1,123 @@
 package cn.hutool.system;
 
 import java.io.Serializable;
+import java.net.Inet4Address;
 import java.net.InetAddress;
+import java.net.NetworkInterface;
 import java.net.UnknownHostException;
+import java.util.Enumeration;
 
 /**
  * 代表当前主机的信息。
  */
-public class HostInfo implements Serializable{
-	private static final long serialVersionUID = 1L;
+public class HostInfo implements Serializable {
+    private static final long serialVersionUID = 1L;
 
-	private final String HOST_NAME;
-	private final String HOST_ADDRESS;
+    private final String HOST_NAME;
+    private final String HOST_ADDRESS;
+    private final String HOST_NETWORK_CARD_ADDRESS;
 
-	public HostInfo() {
-		String hostName;
-		String hostAddress;
+    public HostInfo() {
+        String hostName;
+        String hostAddress;
+        String hostNetworkCardAddress;
 
-		try {
-			InetAddress localhost = InetAddress.getLocalHost();
+        try {
+            InetAddress localhost = InetAddress.getLocalHost();
 
-			hostName = localhost.getHostName();
-			hostAddress = localhost.getHostAddress();
-		} catch (UnknownHostException e) {
-			hostName = "localhost";
-			hostAddress = "127.0.0.1";
-		}
+            hostName = localhost.getHostName();
+            hostAddress = localhost.getHostAddress();
+            hostNetworkCardAddress = getInternetIp();
+        } catch (UnknownHostException e) {
+            hostName = "localhost";
+            hostAddress = "127.0.0.1";
+            hostNetworkCardAddress = "127.0.0.1";
+        }
 
-		HOST_NAME = hostName;
-		HOST_ADDRESS = hostAddress;
-	}
+        HOST_NAME = hostName;
+        HOST_ADDRESS = hostAddress;
+        HOST_NETWORK_CARD_ADDRESS = hostNetworkCardAddress;
+    }
 
-	/**
-	 * 取得当前主机的名称。
-	 * 
-	 * <p>
-	 * 例如：<code>"webserver1"</code>
-	 * </p>
-	 * 
-	 * @return 主机名
-	 */
-	public final String getName() {
-		return HOST_NAME;
-	}
+    /**
+     * 取得当前主机的名称。
+     *
+     * <p>
+     * 例如：<code>"webserver1"</code>
+     * </p>
+     *
+     * @return 主机名
+     */
+    public final String getName() {
+        return HOST_NAME;
+    }
 
-	/**
-	 * 取得当前主机的地址。
-	 * 
-	 * <p>
-	 * 例如：<code>"192.168.0.1"</code>
-	 * </p>
-	 * 
-	 * @return 主机地址
-	 */
-	public final String getAddress() {
-		return HOST_ADDRESS;
-	}
+    /**
+     * 取得当前主机的地址。
+     *
+     * <p>
+     * 例如：<code>"192.168.0.1"</code>
+     * </p>
+     *
+     * @return 主机地址
+     */
+    public final String getAddress() {
+        return HOST_ADDRESS;
+    }
 
-	/**
-	 * 将当前主机的信息转换成字符串。
-	 * 
-	 * @return 主机信息的字符串表示
-	 */
-	@Override
-	public final String toString() {
-		StringBuilder builder = new StringBuilder();
+    /**
+     * 取得当前主机的网卡IP地址。
+     * <p>
+     * 例如：<code>"192.168.0.1"</code>
+     * </p>
+     *
+     * @return 网卡IP地址
+     */
+    public final String getNetworkCardAddress() {
+        return HOST_NETWORK_CARD_ADDRESS;
+    }
 
-		SystemUtil.append(builder, "Host Name:    ", getName());
-		SystemUtil.append(builder, "Host Address: ", getAddress());
+    /**
+     * 获得网卡IP
+     *
+     * @return 网卡IP
+     */
+    public static String getInternetIp() {
+        String INTRANET_IP = null;
+        try {
+            Enumeration<NetworkInterface> networks = NetworkInterface.getNetworkInterfaces();
+            InetAddress ip = null;
+            Enumeration<InetAddress> addrs;
+            while (networks.hasMoreElements()) {
+                addrs = networks.nextElement().getInetAddresses();
+                while (addrs.hasMoreElements()) {
+                    ip = addrs.nextElement();
+                    if (ip != null && ip instanceof Inet4Address && ip.isSiteLocalAddress() && !ip.getHostAddress().equals(INTRANET_IP)) {
+                        return ip.getHostAddress();
+                    }
+                }
+            }
+            // 如果没有网卡IP，就返回/etc/hosts IP
+            return INTRANET_IP;
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
 
-		return builder.toString();
-	}
+    /**
+     * 将当前主机的信息转换成字符串。
+     *
+     * @return 主机信息的字符串表示
+     */
+    @Override
+    public final String toString() {
+        StringBuilder builder = new StringBuilder();
+
+        SystemUtil.append(builder, "Host Name:    ", getName());
+        SystemUtil.append(builder, "Host Address: ", getAddress());
+        SystemUtil.append(builder, "Host NETWORK CARD ADDRESS: ", getNetworkCardAddress());
+
+        return builder.toString();
+    }
 
 }