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上的不同端口上运行。
现在所有节点都创建一个Socket，其目标IP作为称为自举节点的特殊节点的IP。然后，节点创建自己的ServerSocket并开始侦听连接。
bootstrapping节点维护一个节点列表，并在被查询时返回它们。
现在我需要的是节点必须将其IP注册到自举节点。一旦客户端连接到引导节点的cli.getInetAddress()但我没有工作，我尝试使用ServerSocket。
使用代码：
System.out.println(Inet4Address.getLocalHost().getHostAddress());
或
System.out.println(InetAddress.getLocalHost().getHostAddress());
我的PPP连接IP地址是：117.204.44.192，但上面的回报是192.168.1.2
修改
我使用以下代码：
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());
}
}
我能够获得与所有NetworkInterface相关联的所有IP地址，但我如何区分它们？这是我得到的输出：
127.0.0.1
192.168.1.2
192.168.56.1
117.204.44.19
答案 0 :(得分：256)
在最常见的情况下，这可能有点棘手。
从表面上看，InetAddress.getLocalHost()应该为您提供该主机的IP地址。问题是主机可能有很多网络接口，接口可能绑定到多个IP地址。最重要的是，并非所有IP地址都可以在您的机器或LAN之外访问。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。
这意味着InetAddress.getLocalHost()返回的IP地址可能不适合使用。
你怎么处理这个？
NetworkInterface.getNetworkInterfaces()获取主机上的所有已知网络接口，然后遍历每个NI的地址。InetAddress.getByName()查找主IP地址。 （但是你如何得到它，以及如何处理基于DNS的负载均衡器？）总之，InetAddress.getLocalHost()通常会起作用，但您可能需要为在“复杂”网络环境中运行代码的情况提供替代方法。
我能够获得与所有网络接口相关联的所有IP地址，但我如何区分它们？
实际上，InetAddress API提供了测试环回，链接本地，站点本地，多播和广播地址的方法。您可以使用它们来排序您最合适的IP地址。
答案 1 :(得分：79)
import java.net.DatagramSocket;
try(final DatagramSocket socket = new DatagramSocket()){
socket.connect(InetAddress.getByName("8.8.8.8"), 10002);
ip = socket.getLocalAddress().getHostAddress();
}
当有多个网络接口时，这种方式很有效。它始终返回首选的出站IP。无需访问目标8.8.8.8。
Connect具有以下效果：它设置Send / Recv的目的地，丢弃来自其他地址的所有数据包，以及 - 我们使用的 - 将套接字转移到“已连接”状态，设置适当的字段。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的文档，但它看起来像是Berkeley套接字API（UDP“连接”状态的副作用）的一个完整特征，它可以在Windows和Linux中跨版本和发行版可靠地工作。
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无法访问。
答案 2 :(得分：53)
在此处发布来自https://issues.apache.org/jira/browse/JCS-40的测试IP模糊解决方法代码（Linux系统上模糊不清的InetAddress.getLocalHost（））：
/**
* 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;
}
}
答案 3 :(得分：47)
您可以使用java的InetAddress类来实现此目的。
InetAddress IP=InetAddress.getLocalHost();
System.out.println("IP of my system is := "+IP.getHostAddress());
我系统的输出= IP of my system is := 10.100.98.228
以文本表示形式返回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
答案 4 :(得分：13)
当您正在寻找您的＆＃34;当地＆＃34;地址，您应该注意每台机器不仅有一个网络接口，而且每个接口都有自己的本地地址。这意味着您的机器始终拥有多个本地＆＃34;地址。
不同的＆＃34;本地＆＃34;当您连接到不同的端点时，将自动选择要使用的地址。例如，当您连接到google.com时，您正在使用＆＃34;外部＆＃34;当地地址;但是当你连接到localhost时，你的本地地址总是localhost本身，因为localhost只是一个环回。
下面显示了在与google.com：
Socket socket = new Socket();
socket.connect(new InetSocketAddress("google.com", 80));
System.out.println(socket.getLocalAddress());
答案 5 :(得分：10)
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
}
答案 6 :(得分：8)
编辑1：由于上一个链接，更新的代码不再存在
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：停止工作
希望这段代码可以帮助您实现这一目标：
// 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";
}
}
}
答案 7 :(得分：6)
首先导入类
import java.net.InetAddress;
在班级
InetAddress iAddress = InetAddress.getLocalHost();
String currentIp = iAddress.getHostAddress();
System.out.println("Current IP address : " +currentIp); //gives only host address
答案 8 :(得分：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;
}
答案 9 :(得分：5)
您可以使用java.net.InetAddress API。
试试这个：
InetAddress.getLocalHost().getHostAddress();
答案 10 :(得分：4)
这是上面接受的ACCEPTED答案的一个工作示例！ 此NetIdentity类将存储内部主机ip以及本地环回。如果您使用的是基于DNS的服务器，如上所述，您可能需要添加更多检查，或者可以使用配置文件路径。
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，我实际上得到了这样的打印输出：
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设置一个Upnp Server，它有助于理解我正在寻找的'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。并非一切都有地址。所以你要跳过没有的接口对象。
您也可以将其添加到当前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());
}
你会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
答案 11 :(得分：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) {
}
答案 12 :(得分：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();
}
答案 13 :(得分：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();
}
}
答案 14 :(得分：0)
通常当我尝试查找cmyip.com或www.iplocation.net的公共IP地址时，我会这样使用：
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 ;
}
答案 15 :(得分：0)
如果您的计算机是网络的一部分，它将获取网络的IP地址
try {
System.out.println(InetAddress.getLocalHost().getHostAddress());
} catch (UnknownHostException e) {
e.printStackTrace();
}
答案 16 :(得分：0)
由于我的系统（与许多其他系统一样）具有各种网络接口。InetAddress.getLocalHost()或Inet4Address.getLocalHost()只是返回了我不想要的接口。
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.
请小心，以这种方式，我已经知道我想要的IP地址在192.168.2子网中。
答案 17 :(得分：-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;
}