使用Java获取当前计算机的IP地址

291

我正在尝试开发一个系统，其中有不同的节点在不同的系统或同一系统的不同端口上运行。

现在，所有节点都使用目标IP创建一个套接字，该目标IP是称为自举节点的特殊节点的IP。然后，节点创建自己的节点ServerSocket并开始侦听连接。

引导节点维护节点列表，并在查询时返回它们。

现在，我需要的是该节点必须将其IP注册到引导节点。cli.getInetAddress()一旦客户端连接到ServerSocket引导节点的节点，我就尝试使用该方法，但这没有用。

  1. 我需要客户端注册其PPP IP（如果有）；
  2. 否则，LAN IP（如果有）；
  3. 否则，它必须使用相同的计算机注册127.0.0.1。

使用代码：

System.out.println(Inet4Address.getLocalHost().getHostAddress());

要么

System.out.println(InetAddress.getLocalHost().getHostAddress());

我的PPP连接IP地址是：117.204.44.192但以上返回我192.168.1.2

编辑

我正在使用以下代码：

Enumeration e = NetworkInterface.getNetworkInterfaces();
while(e.hasMoreElements())
{
    NetworkInterface n = (NetworkInterface) e.nextElement();
    Enumeration ee = n.getInetAddresses();
    while (ee.hasMoreElements())
    {
        InetAddress i = (InetAddress) ee.nextElement();
        System.out.println(i.getHostAddress());
    }
}

我可以获取所有与all关联的IP地址NetworkInterface，但是如何区分它们呢？这是我得到的输出：

127.0.0.1
192.168.1.2
192.168.56.1
117.204.44.19
java  sockets  ip 
— 萨西达
source
Inet4Address.getLocalHost（）应该正常吗？
— 西尔斯印度
3
在循环中，如果我添加n.isPointToPoint（）会起作用吗？我的想法是，如果找不到“点对点”网络，则返回“ 127.0.0.1”。那行得通吗？
— sasidhar '02
3
@sasidhar：请不要发布您的真实IP地址。可以为私有IP写117.xxx.xxx.xxx。
— nICE COW
@GagandeepBali感谢您的建议，但是我的IP是动态IP，每次断开连接并连接到Internet时，我都会获得一个新IP。我想这应该不成问题。
— sasidhar '02
2
— AlikElzin-kilaka

Answers:

115 
import java.net.DatagramSocket;
import java.net.InetAddress;

try(final DatagramSocket socket = new DatagramSocket()){
  socket.connect(InetAddress.getByName("8.8.8.8"), 10002);
  ip = socket.getLocalAddress().getHostAddress();
}

当存在多个网络接口时，此方法效果很好。它总是返回首选的出站IP。目的地8.8.8.8不需要是可到达的。

Connect在UDP套接字上具有以下效果：它设置发送/接收的目的地，丢弃来自其他地址的所有数据包，并且-这就是我们所使用的-将套接字转换为“已连接”状态，并设置其适当的字段。这包括根据系统的路由表检查到目的地的路由是否存在，并相应地设置本地端点。最后一部分似乎没有正式记载，但看起来像Berkeley套接字API的一个完整特征（UDP“已连接”状态的副作用）可以在Windows和Linux的各个版本和发行版中可靠地运行。

因此，此方法将提供用于连接到指定远程主机的本地地址。没有建立真正的连接，因此指定的远程IP可能无法访问。

编辑：

正如@macomgil所说，对于MacOS，您可以执行以下操作：

Socket socket = new Socket();
socket.connect(new InetSocketAddress("google.com", 80));
System.out.println(socket.getLocalAddress());
— 隔壁的王先生
source
7
它在Linux上对我有用，但在OsX上我却得到：“ 0.0.0.0”
— Radu Toader
@Jeef，答案已更新。如果它在OsX上不起作用，则需要选择另一种方法。
— 王先生，来自隔壁
1
辉煌！仅供参考，在处理封闭的内部网络时，只需将8.8.8.8替换为每个主机都可以到达的位置
— 吴墨菲（Murphy Ng）
在Windows上工作；我们可以确认OSX是否仍然存在问题吗？
— 三部曲
4
@trilogy我仍然在OSX上获得0.0.0.0
— Peter Tutervai
273

在最一般的情况下，这可能会有些棘手。

表面上，InetAddress.getLocalHost()应该给你这个主机的IP地址。问题在于主机可能具有许多网络接口，并且一个接口可能绑定到多个IP地址。最重要的是，并非所有IP地址都可以在您的计算机或LAN外部访问。例如，它们可以是虚拟网络设备的IP地址，专用网络IP地址等等。

这意味着，返回的IP地址InetAddress.getLocalHost()可能不是正确的使用地址。

你怎么处理呢？

  • 一种方法是使用 NetworkInterface.getNetworkInterfaces()获取主机上所有已知的网络接口，然后遍历每个NI的地址。
  • 另一种方法是（以某种方式）获取主机的外部广告FQDN，并使用 InetAddress.getByName()查找主IP地址。（但是，如何获得它，以及如何处理基于DNS的负载平衡器？）
  • 先前版本的一种变化是从配置文件或命令行参数中获取首选的FQDN。
  • 另一个变化是从配置文件或命令行参数获取首选的IP地址。

总而言之，InetAddress.getLocalHost()通常可以使用，但是对于在具有“复杂”网络的环境中运行代码的情况，您可能需要提供一种替代方法。

我能够获得与所有网络接口相关的所有IP地址，但是如何区分它们呢？

  • 127.xxx.xxx.xxx范围内的任何地址都是“回送”地址。仅对“此”主机可见。
  • 192.168.xxx.xxx范围内的任何地址都是私有（也称为本地站点）IP地址。这些保留供组织内部使用。这同样适用于10.xxx.xxx.xxx地址以及172.16.xxx.xxx至172.31.xxx.xxx。
  • 范围为169.254.xxx.xxx的地址是链接本地IP地址。这些保留供单个网段使用。
  • 范围从224.xxx.xxx.xxx到239.xxx.xxx.xxx的地址是多播地址。
  • 地址255.255.255.255是广播地址。
  • 其他任何内容都应该是有效的公共点对点IPv4地址。

实际上，InetAddress API提供了用于测试回送，链接本地，站点本地，多播和广播地址的方法。您可以使用它们来找出最合适的IP地址。

— 斯蒂芬·C
source
3
万一有人好奇，getLocalHost本质上是在服务器的主机名上进行DNS查找。如果它从该查找中获得IP地址，则它将搜索可用的接口以查看哪个接口具有该IP地址，并返回该接口。这意味着getLocalHost将倾向于在“服务器”环境中工作，在该环境中，传出IP是映射到服务器主机名的IP。
— Pace
1
在Ubuntu 14.04上，即使ifconfig仅报告两个接口（我想要的一个接口（可公开访问的IP地址）和回送接口（127.0.0.1）），该api仍返回127.0.1.1。奇怪的是它返回了不同的回送别名。
— ctpenrose
我还要补充一点，如果您use getLocalHost().getHostAddress()要发布内容，0.0.0.0则从网络上的其他计算机查看时可能会看到。这是在这里解释的这是我在两台计算机上使用凉亭时发生的事情
— Peter Mitrano
57

从https://issues.apache.org/jira/browse/JCS-40（在Linux系统上，InetAddress.getLocalHost（）模棱两可）发布此处经过测试的IP歧义解决方法代码：

/**
 * Returns an <code>InetAddress</code> object encapsulating what is most likely the machine's LAN IP address.
 * <p/>
 * This method is intended for use as a replacement of JDK method <code>InetAddress.getLocalHost</code>, because
 * that method is ambiguous on Linux systems. Linux systems enumerate the loopback network interface the same
 * way as regular LAN network interfaces, but the JDK <code>InetAddress.getLocalHost</code> method does not
 * specify the algorithm used to select the address returned under such circumstances, and will often return the
 * loopback address, which is not valid for network communication. Details
 * <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4665037">here</a>.
 * <p/>
 * This method will scan all IP addresses on all network interfaces on the host machine to determine the IP address
 * most likely to be the machine's LAN address. If the machine has multiple IP addresses, this method will prefer
 * a site-local IP address (e.g. 192.168.x.x or 10.10.x.x, usually IPv4) if the machine has one (and will return the
 * first site-local address if the machine has more than one), but if the machine does not hold a site-local
 * address, this method will return simply the first non-loopback address found (IPv4 or IPv6).
 * <p/>
 * If this method cannot find a non-loopback address using this selection algorithm, it will fall back to
 * calling and returning the result of JDK method <code>InetAddress.getLocalHost</code>.
 * <p/>
 *
 * @throws UnknownHostException If the LAN address of the machine cannot be found.
 */
private static InetAddress getLocalHostLANAddress() throws UnknownHostException {
    try {
        InetAddress candidateAddress = null;
        // Iterate all NICs (network interface cards)...
        for (Enumeration ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements();) {
            NetworkInterface iface = (NetworkInterface) ifaces.nextElement();
            // Iterate all IP addresses assigned to each card...
            for (Enumeration inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements();) {
                InetAddress inetAddr = (InetAddress) inetAddrs.nextElement();
                if (!inetAddr.isLoopbackAddress()) {

                    if (inetAddr.isSiteLocalAddress()) {
                        // Found non-loopback site-local address. Return it immediately...
                        return inetAddr;
                    }
                    else if (candidateAddress == null) {
                        // Found non-loopback address, but not necessarily site-local.
                        // Store it as a candidate to be returned if site-local address is not subsequently found...
                        candidateAddress = inetAddr;
                        // Note that we don't repeatedly assign non-loopback non-site-local addresses as candidates,
                        // only the first. For subsequent iterations, candidate will be non-null.
                    }
                }
            }
        }
        if (candidateAddress != null) {
            // We did not find a site-local address, but we found some other non-loopback address.
            // Server might have a non-site-local address assigned to its NIC (or it might be running
            // IPv6 which deprecates the "site-local" concept).
            // Return this non-loopback candidate address...
            return candidateAddress;
        }
        // At this point, we did not find a non-loopback address.
        // Fall back to returning whatever InetAddress.getLocalHost() returns...
        InetAddress jdkSuppliedAddress = InetAddress.getLocalHost();
        if (jdkSuppliedAddress == null) {
            throw new UnknownHostException("The JDK InetAddress.getLocalHost() method unexpectedly returned null.");
        }
        return jdkSuppliedAddress;
    }
    catch (Exception e) {
        UnknownHostException unknownHostException = new UnknownHostException("Failed to determine LAN address: " + e);
        unknownHostException.initCause(e);
        throw unknownHostException;
    }
}
— 瓦济姆
source
6
必须注意的是，如果主机具有多个相似的神经网络接口，这仍然不能解决不确定性。
— Vadzim
1
波纹管的答案是更好- stackoverflow.com/questions/9481865/... 获取用作Src在默认Gatway本地IP地址
— 拉杜Toader
为什么IP地址加上斜杠..？像/10.39.0.17 ..？，是否总是应该这样修剪..？
— 卡纳加维卢·苏古玛
51

为此，您可以使用Java的InetAddress类。

InetAddress IP=InetAddress.getLocalHost();
System.out.println("IP of my system is := "+IP.getHostAddress());

我的系统的输出= IP of my system is := 10.100.98.228

getHostAddress（）返回

以文本形式返回IP地址字符串。

或者你也可以 

InetAddress IP=InetAddress.getLocalHost();
System.out.println(IP.toString());

输出= IP of my system is := RanRag-PC/10.100.98.228

— 冉拉格
source
9
请注意，10.xxx是专用地址，表明您的系统位于NAT网络上。与外界联系时，它将显示为其他地址。如果您确实需要外部IP地址，则必须联系许多站点之一，这些站点将回显您所来自的IP地址。这可能对您没有用处。无论如何，几乎肯定无法从外部访问您的系统。
— 爱德华·福尔克
19

在寻找“本地”地址时，应注意，每台计算机不仅具有单个网络接口，而且每个接口都可以具有自己的本地地址。这意味着您的计算机始终拥有多个“本地”地址。

当您连接到不同的端点时，将自动选择使用不同的“本地”地址。例如，当您连接到时google.com，您使用的是“外部”本地地址。但是，当您连接到时localhost，您的本地地址始终是localhost其自身，因为localhost只是一个环回。

下面显示了与您通信时如何查找您的本地地址google.com：

Socket socket = new Socket();
socket.connect(new InetSocketAddress("google.com", 80));
System.out.println(socket.getLocalAddress());
— 马可吉尔
source
太棒了!! -如此简单:)
— smilyface '17
4
最后添加socket.close（）:)
— MC
11

scala中的示例（在sbt文件中有用）：

  import collection.JavaConverters._
  import java.net._

  def getIpAddress: String = {

    val enumeration = NetworkInterface.getNetworkInterfaces.asScala.toSeq

    val ipAddresses = enumeration.flatMap(p =>
      p.getInetAddresses.asScala.toSeq
    )

    val address = ipAddresses.find { address =>
      val host = address.getHostAddress
      host.contains(".") && !address.isLoopbackAddress
    }.getOrElse(InetAddress.getLocalHost)

    address.getHostAddress
  }
— 安德烈·乔兹维克
source
10

编辑1：由于上一个链接，更新的代码已不存在

import java.io.*;
import java.net.*;

public class GetMyIP {
    public static void main(String[] args) {
        URL url = null;
        BufferedReader in = null;
        String ipAddress = "";
        try {
            url = new URL("http://bot.whatismyipaddress.com");
            in = new BufferedReader(new InputStreamReader(url.openStream()));
            ipAddress = in.readLine().trim();
            /* IF not connected to internet, then
             * the above code will return one empty
             * String, we can check it's length and
             * if length is not greater than zero, 
             * then we can go for LAN IP or Local IP
             * or PRIVATE IP
             */
            if (!(ipAddress.length() > 0)) {
                try {
                    InetAddress ip = InetAddress.getLocalHost();
                    System.out.println((ip.getHostAddress()).trim());
                    ipAddress = (ip.getHostAddress()).trim();
                } catch(Exception exp) {
                    ipAddress = "ERROR";
                }
            }
        } catch (Exception ex) {
            // This try will give the Private IP of the Host.
            try {
                InetAddress ip = InetAddress.getLocalHost();
                System.out.println((ip.getHostAddress()).trim());
                ipAddress = (ip.getHostAddress()).trim();
            } catch(Exception exp) {
                ipAddress = "ERROR";
            }
            //ex.printStackTrace();
        }
        System.out.println("IP Address: " + ipAddress);
    }
}

实际版本：此操作停止了

希望此代码段可以帮助您实现以下目标： 

// Method to get the IP Address of the Host.
private String getIP()
{
    // This try will give the Public IP Address of the Host.
    try
    {
        URL url = new URL("http://automation.whatismyip.com/n09230945.asp");
        BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
        String ipAddress = new String();
        ipAddress = (in.readLine()).trim();
        /* IF not connected to internet, then
         * the above code will return one empty
         * String, we can check it's length and
         * if length is not greater than zero, 
         * then we can go for LAN IP or Local IP
         * or PRIVATE IP
         */
        if (!(ipAddress.length() > 0))
        {
            try
            {
                InetAddress ip = InetAddress.getLocalHost();
                System.out.println((ip.getHostAddress()).trim());
                return ((ip.getHostAddress()).trim());
            }
            catch(Exception ex)
            {
                return "ERROR";
            }
        }
        System.out.println("IP Address is : " + ipAddress);

        return (ipAddress);
    }
    catch(Exception e)
    {
        // This try will give the Private IP of the Host.
        try
        {
            InetAddress ip = InetAddress.getLocalHost();
            System.out.println((ip.getHostAddress()).trim());
            return ((ip.getHostAddress()).trim());
        }
        catch(Exception ex)
        {
            return "ERROR";
        }
    }
}
— 细线
source
2
如果我总是连接到互联网，则该解决方案将起作用，但我不能保证。此外，如果系统未连接到Internet，则需要返回系统的LAN IP地址（如果有），否则返回本地主机。所以对我来说不是一个可行的选择。还有其他办法吗？
— sasidhar '02
@sasidhar：当您连接到Internet时，我想只有您拥有公用IP，如果没有连接，则此方法将为您提供本地IP或LAN IP，并提供您指定的最后一种条件您可以返回“ 127.0.0.1”，而不是返回Error。
— nICE COW
1
我喜欢您的方法，但是该链接似乎不再起作用！我可以在我自己的系统上放置一个控制器来代替该外部链接来工作，以便更可靠吗？
— azerafati 2014年
1
@Bludream：非常感谢您，据我所知，该链接不再起作用。我已经更新了帖子，并添加了一些新内容。希望它适用于您的用户案例。关于您的问题，我真的不知道如何在自己的系统上设置控制器以使其正常工作。因此，我将无法对这个话题（MY BAD）给出见解。再次感谢您，并保持
— 微笑
1
尽管这是一个很酷的解决方案，但它绝对不可靠。如果您要阻止主线程（让我们说），并且由于某种原因whatismyip.com关闭了一段时间，您的应用程序也将关闭:(。否则它将返回垃圾数据并导致意外行为。此外，这还会返回外部多数IP地址可由whatismyip.com，但不一定是您所用计算机的IP地址检测到
— 解码时间为
6

首先导入课程

import java.net.InetAddress;

在班上

  InetAddress iAddress = InetAddress.getLocalHost();
  String currentIp = iAddress.getHostAddress();
  System.out.println("Current IP address : " +currentIp); //gives only host address
— 高塔姆
source
2
即使没有使用，它也只给出第一个IP地址！
— Yahya
6

您可以使用java.net.InetAddressAPI。尝试这个 ：

InetAddress.getLocalHost().getHostAddress();
— Ved
source
5
它只会返回127.0.0.1
— HCarrasko'1
5 
private static InetAddress getLocalAddress(){
        try {
            Enumeration<NetworkInterface> b = NetworkInterface.getNetworkInterfaces();
            while( b.hasMoreElements()){
                for ( InterfaceAddress f : b.nextElement().getInterfaceAddresses())
                    if ( f.getAddress().isSiteLocalAddress())
                        return f.getAddress();
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
        return null;
    }
— JR
source
1
请考虑添加一些有关代码功能的解释。
— HCarrasko '16
4

这是上面“已接受”答案的有效示例！该NetIdentity类将存储内部主机ip以及本地环回。如上所述，如果您使用的是基于DNS的服务器，则可能需要添加更多检查，或者可能需要执行“配置文件路由”。

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;

/**
 * Class that allows a device to identify itself on the INTRANET.
 * 
 * @author Decoded4620 2016
 */
public class NetIdentity {

    private String loopbackHost = "";
    private String host = "";

    private String loopbackIp = "";
    private String ip = "";
    public NetIdentity(){

        try{
            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();

            while(interfaces.hasMoreElements()){
                NetworkInterface i = interfaces.nextElement();
                if(i != null){
                    Enumeration<InetAddress> addresses = i.getInetAddresses();
                    System.out.println(i.getDisplayName());
                    while(addresses.hasMoreElements()){
                        InetAddress address = addresses.nextElement();
                        String hostAddr = address.getHostAddress();

                        // local loopback
                        if(hostAddr.indexOf("127.") == 0 ){
                            this.loopbackIp = address.getHostAddress();
                            this.loopbackHost = address.getHostName();
                        }

                        // internal ip addresses (behind this router)
                        if( hostAddr.indexOf("192.168") == 0 || 
                                hostAddr.indexOf("10.") == 0 || 
                                hostAddr.indexOf("172.16") == 0 ){
                            this.host = address.getHostName();
                            this.ip = address.getHostAddress();
                        }


                        System.out.println("\t\t-" + address.getHostName() + ":" + address.getHostAddress() + " - "+ address.getAddress());
                    }
                }
            }
        }
        catch(SocketException e){

        }
        try{
            InetAddress loopbackIpAddress = InetAddress.getLocalHost();
            this.loopbackIp = loopbackIpAddress.getHostName();
            System.out.println("LOCALHOST: " + loopbackIp);
        }
        catch(UnknownHostException e){
            System.err.println("ERR: " + e.toString());
        }
    }

    public String getLoopbackHost(){
        return loopbackHost;
    }

    public String getHost(){
        return host;
    }
    public String getIp(){
        return ip;
    }
    public String getLoopbackIp(){
        return loopbackIp;
    }
}

当我运行此代码时，实际上是这样打印出来的：

    Software Loopback Interface 1
        -127.0.0.1:127.0.0.1 - [B@19e1023e
        -0:0:0:0:0:0:0:1:0:0:0:0:0:0:0:1 - [B@7cef4e59
Broadcom 802.11ac Network Adapter
        -VIKING.yourisp.com:192.168.1.142 - [B@64b8f8f4
        -fe80:0:0:0:81fa:31d:21c9:85cd%wlan0:fe80:0:0:0:81fa:31d:21c9:85cd%wlan0 - [B@2db0f6b2
Microsoft Kernel Debug Network Adapter
Intel Edison USB RNDIS Device
Driver for user-mode network applications
Cisco Systems VPN Adapter for 64-bit Windows
VirtualBox Host-Only Ethernet Adapter
        -VIKING:192.168.56.1 - [B@3cd1f1c8
        -VIKING:fe80:0:0:0:d599:3cf0:5462:cb7%eth4 - [B@3a4afd8d
LogMeIn Hamachi Virtual Ethernet Adapter
        -VIKING:25.113.118.39 - [B@1996cd68
        -VIKING:2620:9b:0:0:0:0:1971:7627 - [B@3339ad8e
        -VIKING:fe80:0:0:0:51bf:994d:4656:8486%eth5 - [B@555590
Bluetooth Device (Personal Area Network)
        -fe80:0:0:0:4c56:8009:2bca:e16b%eth6:fe80:0:0:0:4c56:8009:2bca:e16b%eth6 - [B@3c679bde
Bluetooth Device (RFCOMM Protocol TDI)
Intel(R) Ethernet Connection (2) I218-V
        -fe80:0:0:0:4093:d169:536c:7c7c%eth7:fe80:0:0:0:4093:d169:536c:7c7c%eth7 - [B@16b4a017
Microsoft Wi-Fi Direct Virtual Adapter
        -fe80:0:0:0:103e:cdf0:c0ac:1751%wlan1:fe80:0:0:0:103e:cdf0:c0ac:1751%wlan1 - [B@8807e25
VirtualBox Host-Only Ethernet Adapter-HHD Software NDIS 6.0 Filter Driver-0000
VirtualBox Host-Only Ethernet Adapter-WFP Native MAC Layer LightWeight Filter-0000
VirtualBox Host-Only Ethernet Adapter-HHD Software NDIS 6.0 Filter Driver-0001
VirtualBox Host-Only Ethernet Adapter-HHD Software NDIS 6.0 Filter Driver-0002
VirtualBox Host-Only Ethernet Adapter-VirtualBox NDIS Light-Weight Filter-0000
VirtualBox Host-Only Ethernet Adapter-HHD Software NDIS 6.0 Filter Driver-0003
VirtualBox Host-Only Ethernet Adapter-QoS Packet Scheduler-0000
VirtualBox Host-Only Ethernet Adapter-HHD Software NDIS 6.0 Filter Driver-0004
VirtualBox Host-Only Ethernet Adapter-WFP 802.3 MAC Layer LightWeight Filter-0000
VirtualBox Host-Only Ethernet Adapter-HHD Software NDIS 6.0 Filter Driver-0005
Intel(R) Ethernet Connection (2) I218-V-HHD Software NDIS 6.0 Filter Driver-0000
Intel(R) Ethernet Connection (2) I218-V-WFP Native MAC Layer LightWeight Filter-0000
Intel(R) Ethernet Connection (2) I218-V-HHD Software NDIS 6.0 Filter Driver-0001
Intel(R) Ethernet Connection (2) I218-V-Shrew Soft Lightweight Filter-0000
Intel(R) Ethernet Connection (2) I218-V-HHD Software NDIS 6.0 Filter Driver-0002
Intel(R) Ethernet Connection (2) I218-V-VirtualBox NDIS Light-Weight Filter-0000
Intel(R) Ethernet Connection (2) I218-V-HHD Software NDIS 6.0 Filter Driver-0003
Intel(R) Ethernet Connection (2) I218-V-QoS Packet Scheduler-0000
Intel(R) Ethernet Connection (2) I218-V-HHD Software NDIS 6.0 Filter Driver-0004
Intel(R) Ethernet Connection (2) I218-V-WFP 802.3 MAC Layer LightWeight Filter-0000
Intel(R) Ethernet Connection (2) I218-V-HHD Software NDIS 6.0 Filter Driver-0005
Broadcom 802.11ac Network Adapter-WFP Native MAC Layer LightWeight Filter-0000
Broadcom 802.11ac Network Adapter-Virtual WiFi Filter Driver-0000
Broadcom 802.11ac Network Adapter-Native WiFi Filter Driver-0000
Broadcom 802.11ac Network Adapter-HHD Software NDIS 6.0 Filter Driver-0003
Broadcom 802.11ac Network Adapter-Shrew Soft Lightweight Filter-0000
Broadcom 802.11ac Network Adapter-HHD Software NDIS 6.0 Filter Driver-0004
Broadcom 802.11ac Network Adapter-VirtualBox NDIS Light-Weight Filter-0000
Broadcom 802.11ac Network Adapter-HHD Software NDIS 6.0 Filter Driver-0005
Broadcom 802.11ac Network Adapter-QoS Packet Scheduler-0000
Broadcom 802.11ac Network Adapter-HHD Software NDIS 6.0 Filter Driver-0006
Broadcom 802.11ac Network Adapter-WFP 802.3 MAC Layer LightWeight Filter-0000
Broadcom 802.11ac Network Adapter-HHD Software NDIS 6.0 Filter Driver-0007
Microsoft Wi-Fi Direct Virtual Adapter-WFP Native MAC Layer LightWeight Filter-0000
Microsoft Wi-Fi Direct Virtual Adapter-Native WiFi Filter Driver-0000
Microsoft Wi-Fi Direct Virtual Adapter-HHD Software NDIS 6.0 Filter Driver-0002
Microsoft Wi-Fi Direct Virtual Adapter-Shrew Soft Lightweight Filter-0000
Microsoft Wi-Fi Direct Virtual Adapter-HHD Software NDIS 6.0 Filter Driver-0003
Microsoft Wi-Fi Direct Virtual Adapter-VirtualBox NDIS Light-Weight Filter-0000
Microsoft Wi-Fi Direct Virtual Adapter-HHD Software NDIS 6.0 Filter Driver-0004
Microsoft Wi-Fi Direct Virtual Adapter-QoS Packet Scheduler-0000
Microsoft Wi-Fi Direct Virtual Adapter-HHD Software NDIS 6.0 Filter Driver-0005
Microsoft Wi-Fi Direct Virtual Adapter-WFP 802.3 MAC Layer LightWeight Filter-0000
Microsoft Wi-Fi Direct Virtual Adapter-HHD Software NDIS 6.0 Filter Driver-0006

对于我的使用，我正在安装Upnp服务器，它有助于了解我正在寻找的“模式”。返回的一些对象是以太网适配器，网络适配器，虚拟网络适配器，驱动程序和VPN客户端适配器。并非所有内容都具有地址。因此，您将希望跳过那些不需要的接口对象。

您也可以将其添加到当前的循环中 NetworkInterface i

while(interfaces.hasMoreElements()){
    Enumeration<InetAddress> addresses = i.getInetAddresses();
    System.out.println(i.getDisplayName());
    System.out.println("\t- name:" + i.getName());
    System.out.println("\t- idx:" + i.getIndex());
    System.out.println("\t- max trans unit (MTU):" + i.getMTU());
    System.out.println("\t- is loopback:" + i.isLoopback());
    System.out.println("\t- is PPP:" + i.isPointToPoint());
    System.out.println("\t- isUp:" + i.isUp());
    System.out.println("\t- isVirtual:" + i.isVirtual());
    System.out.println("\t- supportsMulticast:" + i.supportsMulticast());
}

您将在输出中看到如下信息：

Software Loopback Interface 1
    - name:lo
    - idx:1
    - max trans unit (MTU):-1
    - is loopback:true
    - is PPP:false
    - isUp:true
    - isVirtual:false
    - supportsMulticast:true
        -ADRESS: [127.0.0.1(VIKING-192.168.56.1)]127.0.0.1:127.0.0.1 - [B@19e1023e
        -ADRESS: [0:0:0:0:0:0:0:1(VIKING-192.168.56.1)]0:0:0:0:0:0:0:1:0:0:0:0:0:0:0:1 - [B@7cef4e59
Broadcom 802.11ac Network Adapter
    - name:wlan0
    - idx:2
    - max trans unit (MTU):1500
    - is loopback:false
    - is PPP:false
    - isUp:true
    - isVirtual:false
    - supportsMulticast:true
        -ADRESS: [VIKING.monkeybrains.net(VIKING-192.168.56.1)]VIKING.monkeybrains.net:192.168.1.142 - [B@64b8f8f4
        -ADRESS: [fe80:0:0:0:81fa:31d:21c9:85cd%wlan0(VIKING-192.168.56.1)]fe80:0:0:0:81fa:31d:21c9:85cd%wlan0:fe80:0:0:0:81fa:31d:21c9:85cd%wlan0 - [B@2db0f6b2
Microsoft Kernel Debug Network Adapter
    - name:eth0
    - idx:3
    - max trans unit (MTU):-1
    - is loopback:false
    - is PPP:false
    - isUp:false
    - isVirtual:false
    - supportsMulticast:true
— 解码后
source
3

使用InetAddress.getLocalHost（）获取本地地址

import java.net.InetAddress;

try {
  InetAddress addr = InetAddress.getLocalHost();            
  System.out.println(addr.getHostAddress());
} catch (UnknownHostException e) {
}
— Vdeantoni
source
我的PPP连接IP地址为：117.204.44.192但以上返回我192.168.1.2
— sasidhar 2012年
您需要对所有可用的InetAddress实例进行爬网，并找出哪一个是合适的。
— 解码
1 
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class IpAddress {

NetworkInterface ifcfg;
Enumeration<InetAddress> addresses;
String address;

public String getIpAddress(String host) {
    try {
        ifcfg = NetworkInterface.getByName(host);
        addresses = ifcfg.getInetAddresses();
        while (addresses.hasMoreElements()) {
            address = addresses.nextElement().toString();
            address = address.replace("/", "");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return ifcfg.toString();
}
}
— twatson0990
source
1

一种相当简单的方法似乎正在起作用...

String getPublicIPv4() throws UnknownHostException, SocketException{
    Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
    String ipToReturn = null;
    while(e.hasMoreElements())
    {
        NetworkInterface n = (NetworkInterface) e.nextElement();
        Enumeration<InetAddress> ee = n.getInetAddresses();
        while (ee.hasMoreElements())
        {
            InetAddress i = (InetAddress) ee.nextElement();
            String currentAddress = i.getHostAddress();
            logger.trace("IP address "+currentAddress+ " found");
            if(!i.isSiteLocalAddress()&&!i.isLoopbackAddress() && validate(currentAddress)){
                ipToReturn = currentAddress;    
            }else{
                System.out.println("Address not validated as public IPv4");
            }

        }
    }

    return ipToReturn;
}

private static final Pattern IPv4RegexPattern = Pattern.compile(
        "^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$");

public static boolean validate(final String ip) {
    return IPv4RegexPattern.matcher(ip).matches();
}
— Pantelis Natsiavas
source
1

如果您的计算机是网络的一部分，则将获取网络的IP地址

try {
    System.out.println(InetAddress.getLocalHost().getHostAddress());
} catch (UnknownHostException e) {
    e.printStackTrace();
}
— 代码511788465541441
source
0

通常，当我尝试找到我的公共IP地址（例如cmyip.com或www.iplocation.net）时，我会使用以下方式：

public static String myPublicIp() {

    /*nslookup myip.opendns.com resolver1.opendns.com*/
    String ipAdressDns  = "";
    try {
        String command = "nslookup myip.opendns.com resolver1.opendns.com";
        Process proc = Runtime.getRuntime().exec(command);

        BufferedReader stdInput = new BufferedReader(new InputStreamReader(proc.getInputStream()));

        String s;
        while ((s = stdInput.readLine()) != null) {
            ipAdressDns  += s + "\n";
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

    return ipAdressDns ;
}
— YCF_L
source
0

由于我的系统（像许多其他系统一样）具有各种网络接口。InetAddress.getLocalHost()或Inet4Address.getLocalHost()干脆退回了我不想要的那个。因此，我不得不使用这种幼稚的方法。

InetAddress[] allAddresses = Inet4Address.getAllByName("YourComputerHostName");
        InetAddress desiredAddress;
        //In order to find the desired Ip to be routed by other modules (WiFi adapter)
        for (InetAddress address :
                allAddresses) {
            if (address.getHostAddress().startsWith("192.168.2")) {
                desiredAddress = address;
            }
        }
// Use the desired address for whatever purpose.

请注意，通过这种方法，我已经知道我想要的IP地址在192.168.2子网中。

— SepJaPro2.4
source
-1 
public static String getIpAddress() {

    String ipAddress = null;

    try {
        Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();

        while (networkInterfaces.hasMoreElements()) {

            NetworkInterface networkInterface = networkInterfaces.nextElement();

            byte[] hardwareAddress = networkInterface.getHardwareAddress();
            if (null == hardwareAddress || 0 == hardwareAddress.length || (0 == hardwareAddress[0] && 0 == hardwareAddress[1] && 0 == hardwareAddress[2])) continue;

            Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();

            if (inetAddresses.hasMoreElements()) ipAddress = inetAddresses.nextElement().toString();

            break;
        }
    } catch (SocketException e) {
        e.printStackTrace();
    }

    return ipAddress;
}
— 最大
source
请添加一些有关代码功能的解释。
— HCarrasko '16
By using our site, you acknowledge that you have read and understand our Cookie Policy and Privacy Policy.
Licensed under cc by-sa 3.0 with attribution required.