java获得IP地址

下面有一篇文章，介绍若何读取物理网卡的地址 ，同样的

你可以用这个方法读取你所需要的本机IP地址

=======================================================

J2SE50新特性之ProcessBuilder

这个例子使用了J2SE50的ProcessBuilder类执行外部的程序，相对于 Runtimeexec ,它更方便，可以设置环境变量等。这里使用它在windows下读取物理网卡的地址

package comkuaffjdk5package;

import javaioIOException;

import javaioInputStream;

import javautilArrayList;

import javautilList;

public class ProcessBuilderShow

{

public static List getPhysicalAddress()

{

Process p = null;

//物理网卡列表

List address = new ArrayList();

try

{

//执行ipconfig /all命令

p = new ProcessBuilder("ipconfig", "/all")start();

}

catch (IOException e)

{

return address;

}

byte[] b = new byte[1024];

StringBuffer sb = new StringBuffer();

//读取进程输出值

InputStream in = pgetInputStream();

try

{

while (inread(b)>0)

{

sbappend(new String(b));

}

}

catch (IOException e1)

{

}

finally

{

try

{

inclose();

}

catch (IOException e2)

{

}

}

//以下分析输出值，得到物理网卡

String rtValue = sbsubstring(0);

int i = rtValueindexOf("Physical Address :");

while(i>0)

{

rtValue = rtValuesubstring(i + "Physical Address :"length());

addressadd(rtValuesubstring(0,18));

i = rtValueindexOf("Physical Address :");

}

return address;

}

public static void main(String[] args)

{

List address = ProcessBuilderShowgetPhysicalAddress();

for(String add:address)

{

Systemoutprintf("物理网卡地址:%s%n", add);

}

}

}

import javanet;

public class Test {

public static void main(String[] args) throws Exception {

String ip = InetAddressgetLocalHost()getHostAddress();

Systemoutprintln(ip);

}

}

import javanetInet4Address;

import javanetInetAddress;

import javanetNetworkInterface;

import javanetSocketException;

import javautilArrayList;

import javautilEnumeration;

import javautilList;

/

@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 = NetworkInterfacegetNetworkInterfaces();

} catch (SocketException e) {

eprintStackTrace();

}

InetAddress ip = null;

while (allNetInterfaceshasMoreElements()) {

NetworkInterface netInterface = (NetworkInterface) allNetInterfacesnextElement();

Enumeration<InetAddress> addresses = netInterfacegetInetAddresses();

while (addresseshasMoreElements()) {

// 获得当前网络接口

ip = (InetAddress) addressesnextElement();

if (ip != null && ip instanceof Inet4Address && ipgetHostAddress()indexOf("") != -1) {

ipsadd(ipgetHostAddress());

}

}

}

if (ipssize() == 1) {

return ipsget(0);

} else {

for (String ipa : ips) {

if (!"127001"equals(ipa)) {

return ipa;

}

}

}

return MacAddressfind();

}

}

public static void main(String[] args) {

try {

Systemoutprintln("当前时间:"+new Date());

Systemoutprintln("IP地址 : " + InetAddressgetLocalHost());

} catch (UnknownHostException e) {

eprintStackTrace();

}

}

import javanetInetAddress;

import javanetUnknownHostException;

public class Test

{

public static void main(String[] args) throws UnknownHostException

{

InetAddress inet = InetAddressgetLocalHost();

Systemoutprintln("本机的ip=" + inetgetHostAddress());

}

}

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