① 如何用java获取本地ip地址

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

/**
* @author Becolette
* @description TODO
* @date 2015-11-5 下午01:58:46
*/
public class IpAddress {
public static String find() {
List<String> ips = new ArrayList<String>();
// 返回所有网络接口的一个枚举实例
Enumeration<?> allNetInterfaces = null;
try {
allNetInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
e.printStackTrace();
}
InetAddress ip = null;
while (allNetInterfaces.hasMoreElements()) {
NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
while (addresses.hasMoreElements()) {
// 获得当前网络接口
ip = (InetAddress) addresses.nextElement();
if (ip != null && ip instanceof Inet4Address && ip.getHostAddress().indexOf(".") != -1) {
ips.add(ip.getHostAddress());
}
}
}
if (ips.size() == 1) {
return ips.get(0);
} else {
for (String ipa : ips) {
if (!"127.0.0.1".equals(ipa)) {
return ipa;
}
}
}
return MacAddress.find();
}
}

② java如何获取当前登录ip

为适应不同的网络情况，提供这个类：看下面的代码吧，Copy过去就能用。
import javax.servlet.http.HttpServletRequest;

public class HttpUtil {

public static String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
}

③ 如何利用JAVA获得本机实际IP

import <a href="https://www..com/s?wd=java.net&tn=44039180_cpr&fenlei=-4Bmy-bIi4WUvYETgN-TLwGUv3En1c3nW6vPWDz" target="_blank" class="-highlight">java.net</a>.*;

public class Test6 {

public static void main(String[] args) {
// TODO Auto-generated method stub
InetAddress ia=null;
try {
ia=ia.getLocalHost();

String localname=ia.getHostName();
String localip=ia.getHostAddress();
System.out.println("本机名称是："+ localname);
System.out.println("本机的ip是 ："+localip);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

④ java通过域名怎么获取本机ip

import java.net.InetAddress;
import java.net.UnknownHostException;
public class NsLookup {
static public void main(String[] args) {
try {
System.out.println("try");
InetAddress address = InetAddress.getByName(args[0]);
System.out.println(args[0]+" : "+address.getHostAddress());

}catch(UnknownHostException uhe) {
System.out.println("catch");
System.err.println("Unable to find: "+args[0]);

}
}

}

⑤ java编程如何获取本地ip并显示在文本框中

jsp中：
request方法
客户端IP: request.getRemoteAddr()
输出：192.168.0.106
客户端主机名：request.getRemoteHost()
输出：abc
request.getHeader("Host")
输出：192.168.0.1：8080
Web服务器名字：request.getServerName()
输出：192.168.0.1
服务器监听的端口：request.getServerPort()
输出：8080
在JSP里，获取客户端的IP地址的方法是：request.getRemoteAddr（），这种方法在大部分情况下都是有效的。但是在通过了 Apache，Squid等反向代理软件就不能获取到客户端的真实IP地址了。如果使用了反向代理软件，用 request.getRemoteAddr（）方法获取的IP地址是：127.0.0.1或 192.168.1.110，而并不是客户端的真实IP。

经过代理以后，由于在客户端和服务之间增加了中间层，因此服务器无法直接拿到客户端的 IP，服务器端应用也无法直接通过转发请求的地址返回给客户端。但是在转发请求的HTTP头信息中，增加了X－FORWARDED－FOR信息。用以跟踪 原有的客户端IP地址和原来客户端请求的服务器地址。当我们访问index.jsp/时，其实并不是我们浏览器真正访问到了服务器上的index.jsp 文件，而是先由代理服务器去访问index.jsp ，代理服务器再将访问到的结果返回给我们的浏览器，因为是代理服务器去访问index.jsp的，所以index.jsp中通过 request.getRemoteAddr（）的方法获取的IP实际上是代理服务器的地址，并不是客户端的IP地址。

于是可得出获得客户端真实IP地址的方法一：

public String getRemortIP(HttpServletRequest request) {

if (request.getHeader("x-forwarded-for") == null) {

return request.getRemoteAddr();

}

return request.getHeader("x-forwarded-for");

}

获得客户端真实IP地址的方法二：

public String getIpAddr(HttpServletRequest request) {

String ip = request.getHeader("x-forwarded-for");

if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("Proxy-Client-IP");

}

if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("WL-Proxy-Client-IP");

}

if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

ip = request.getRemoteAddr();

}

return ip;

}

可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？

答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。如：

X-Forwarded-For：192.168.1.110， 192.168.1.120， 192.168.1.130， 192.168.1.100
用户真实IP为： 192.168.1.110

⑥ 怎样用JAVA程序获取本机ip

import java.net.InetAddress;
import java.net.UnknownHostException;

public class Test
{
public static void main(String[] args) throws UnknownHostException
{
InetAddress inet = InetAddress.getLocalHost();
System.out.println("本机的ip=" + inet.getHostAddress());

}
}

⑦ java中获取本地IP地址

方法如下：
方法一，使用CMD命令：
public static String getLocalIPForCMD(){
StringBuilder sb = new StringBuilder();
String command = "cmd.exe /c ipconfig | findstr IPv4";
try {
Process p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while((line = br.readLine()) != null){
line = line.substring(line.lastIndexOf(":")+2,line.length());
sb.append(line);
}
br.close();
p.destroy();
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
方法二，使用Java方法：
public static String getLocalIPForJava(){
StringBuilder sb = new StringBuilder();
try {
Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
while (en.hasMoreElements()) {
NetworkInterface intf = (NetworkInterface) en.nextElement();
Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();
while (enumIpAddr.hasMoreElements()) {
InetAddress inetAddress = (InetAddress) enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress()
&& inetAddress.isSiteLocalAddress()) {
sb.append(inetAddress.getHostAddress().toString()+"\n");
}
}
}
} catch (SocketException e) { }
return sb.toString();
}

⑧ java 如何获得本机ip

Enumeration<NetworkInterface> netInterfaces = null;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
while (netInterfaces.hasMoreElements()) {
NetworkInterface ni = netInterfaces.nextElement();
System.out.println("DisplayName:" + ni.getDisplayName());
System.out.println("Name:" + ni.getName());
Enumeration<InetAddress> ips = ni.getInetAddresses();
while (ips.hasMoreElements()) {
System.out.println("IP:"
+ ips.nextElement().getHostAddress());
}
}
} catch (Exception e) {
e.printStackTrace();
}
Enumeration<NetworkInterface> netInterfaces = null;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
while (netInterfaces.hasMoreElements()) {
NetworkInterface ni = netInterfaces.nextElement();
System.out.println("DisplayName:" + ni.getDisplayName());
System.out.println("Name:" + ni.getName());
Enumeration<InetAddress> ips = ni.getInetAddresses();
while (ips.hasMoreElements()) {
System.out.println("IP:"
+ ips.nextElement().getHostAddress());
}
}
} catch (Exception e) {
e.printStackTrace();
}
看看上面的代码，能否帮到你？