关于Java获取本地服务器IP的问题
Java获取本地服务器IP，我们最简单的写法：
import java.net.InetAddress;
public class CatchIp{
public static void main(String[] args)
{
try
{
// 获取IP地址
String ip = InetAddress.getLocalHost().getHostAddress();
System.out.println("IP地址："+ip);
}
catch (Exception e)
{
System.out.println("异常：" + e);
e.printStackTrace();
}
}
}但是这样有个问题，我们在windows系统，我们可以获取正确的IP
但是放在linux，可能是获取的IP地址为：127.0.0.1
而且在生产系统中，一台服务器可能有很多张网卡，这样获取ip比较麻烦，具体要了解生产系统服务器的IP地址我们可以参考这个网址：
http://blog.163.com/abkiss@126/blog/static/3259410020117493943770/?suggestedreading
代码如下：
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package org.lib.com;
/**
*
* @author Administrator
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
public class TestAddr {
/**
* 获取本机所有IP
*/
private static String[] getAllLocalHostIP() {
List res = new ArrayList();
Enumeration netInterfaces;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;
while (netInterfaces.hasMoreElements()) {
NetworkInterface ni = (NetworkInterface) netInterfaces
.nextElement();
System.out.println("---Name---:" + ni.getName());
Enumeration nii = ni.getInetAddresses();
while (nii.hasMoreElements()) {
ip = (InetAddress) nii.nextElement();
if (ip.getHostAddress().indexOf(":") == -1) {
res.add(ip.getHostAddress());
System.out.println("本机的ip=" + ip.getHostAddress());
}
}
}
} catch (SocketException e) {
e.printStackTrace();
}
return (String[]) res.toArray(new String[0]);
}
public static String getLocalIP() {
String ip = "";
try {
Enumeration e1 = (Enumeration) NetworkInterface.getNetworkInterfaces();
while (e1.hasMoreElements()) {
NetworkInterface ni = (NetworkInterface) e1.nextElement();
System.out.println ("getLocalIP--nic.getDisplayName ():" + ni.getDisplayName ());
System.out.println ("getLocalIP--nic.getName ():" + ni.getName ());
if (!ni.getName().equals("eth0")) {
continue;
} else {
Enumeration e2 = ni.getInetAddresses();
while (e2.hasMoreElements()) {
InetAddress ia = (InetAddress) e2.nextElement();
if (ia instanceof Inet6Address)
continue;
ip = ia.getHostAddress();
}
break;
}
}
} catch (SocketException e) {
e.printStackTrace();
System.exit(-1);
}
return ip;
}
public static String getWinLocalIP ()
{
String ip = "";
try
{
Enumeration e1 = (Enumeration ) NetworkInterface.getNetworkInterfaces ();
while (e1.hasMoreElements ())
{
NetworkInterface ni = (NetworkInterface) e1.nextElement ();
System.out.println ("getWinLocalIP--nic.getDisplayName ():" + ni.getDisplayName ());
System.out.println ("getWinLocalIP--nic.getName ():" + ni.getName ());
Enumeration e2 = ni.getInetAddresses ();
while (e2.hasMoreElements ())
{
InetAddress ia = (InetAddress) e2.nextElement ();
ip = ia.getHostAddress ();
}
}
}
catch (SocketException e)
{
e.printStackTrace ();
System.exit (-1);
}
return ip;
}
/**
* 获取本机所有物理地址
*
* @return
*/
public static String getMacAddress() {
String mac = "";
String line = "";
String os = System.getProperty("os.name");
if (os != null && os.startsWith("Windows")) {
try {
String command = "cmd.exe /c ipconfig /all";
Process p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(new InputStreamReader(p
.getInputStream()));
while ((line = br.readLine()) != null) {
if (line.indexOf("Physical Address") > 0) {
int index = line.indexOf(":") + 2;
mac = line.substring(index);
break;
}
}
br.close();
} catch (IOException e) {
}
}
return mac;
}
public String getMacAddress(String host) {
String mac = "";
StringBuffer sb = new StringBuffer();
try {
NetworkInterface ni = NetworkInterface.getByInetAddress(InetAddress
.getByName(host));
// byte[] macs = ni.getHardwareAddress();
// for (int i = 0; i < macs.length; i++) {
// mac = Integer.toHexString(macs[i] & 0xFF);
//
// if (mac.length() == 1) {
// mac = '0' + mac;
// }
//
// sb.append(mac + "-");
// }
} catch (SocketException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
e.printStackTrace();
}
mac = sb.toString();
mac = mac.substring(0, mac.length() - 1);
return mac;
}
/**
* @param args
*/
public static void main(String[] args) {
TestAddr.getAllLocalHostIP();
System.out.println("LocalIP:"+TestAddr.getLocalIP());
System.out.println("getWinLocalIP:"+TestAddr.getWinLocalIP());
System.out.println(TestAddr.getMacAddress());
}
} import java.net.InetAddress;
public class CatchHostname{
public static void main(String[] args)
{
try
{
// 获取计算机名
String name = InetAddress.getLocalHost().getHostName();
System.out.println("计算机名："+name);
}
catch (Exception e)
{
System.out.println("异常：" + e);
e.printStackTrace();
}
}
}