Java：获取本机所有IP地址，内网IP

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获取IP地址

Java代码如下：
import java.net.Inet4Address;import java.net.InetAddress;import java.net.NetworkInterface;import java.net.SocketException;import java.net.UnknownHostException;import java.util.Enumeration;public class TestGetIP {    public static void main(String[] args) {        TestGetIP testGetIP = new TestGetIP();        testGetIP.printAddresses();        System.out.println("\n\n\n\n");        System.out.println(testGetIP.getIP());    }    // 找一个合理的ipv4    public String getIP() {        try {            // 根据hostname找ip            InetAddress address = InetAddress.getLocalHost();            if (address.isLoopbackAddress()) {                Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();                while (allNetInterfaces.hasMoreElements()) {                    NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();                     Enumeration<InetAddress> addresses = netInterface.getInetAddresses();                    while (addresses.hasMoreElements()) {                        InetAddress ip = addresses.nextElement();                        if (!ip.isLinkLocalAddress() && !ip.isLoopbackAddress() && ip instanceof Inet4Address) {                            return ip.getHostAddress();                        }                    }                }            }            return address.getHostAddress();        } catch (UnknownHostException e) {            e.printStackTrace();            return null;        } catch (SocketException e) {            e.printStackTrace();            return null;        }    }    // 所有网络接口    public void printAddresses() {          try {              Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();              while (allNetInterfaces.hasMoreElements()) {                  NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();                  // 去除回环接口，子接口，未运行和接口                if (netInterface.isLoopback() || netInterface.isVirtual() || !netInterface.isUp()) {                      continue;                  }                Enumeration<InetAddress> addresses = netInterface.getInetAddresses();                while (addresses.hasMoreElements()) {                      InetAddress ip = addresses.nextElement();                     if (ip != null) {                        System.out.println("ip = " + ip.getHostAddress());                        // ipv4                        if (ip instanceof Inet4Address) {                            System.out.println("ipv4 = " + ip.getHostAddress());                            if (ip.getHostAddress().startsWith("192") || ip.getHostAddress().startsWith("10")                                      || ip.getHostAddress().startsWith("172") || ip.getHostAddress().startsWith("169")) {                                  // 内网                             }                        }                    }                }            }        } catch (SocketException e) {            System.err.println("Error when getting host ip address"+ e.getMessage());        }      }}
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