JAVA怎么获取服务器IP

首先IP为一个字符串,例如：

class test{

static void Split(string ip,out string str1)

{

int i=iplength;

while(i>0)

{

char ch=ip[i-1];

if(ch==':')

break;

i--;

}

str1=ipSubstring(0,i);

}

static void Main()

{

string str1;

Split("1921680255:8080",out str1)

ConsoleWriteLine("{0}",str1);

}

}

str1中保存的就是你的ip,1921680255

public static String getHostIpAddress() {

String hostIp = "";

InetAddress netAddress = getInetAddress();

hostIp = getHostIp(netAddress);

return hostIp;

}

public static InetAddress getInetAddress() {

try {

return InetAddressgetLocalHost();

} catch (UnknownHostException e) {

Systemoutprintln("unknown host!");

}

return null;

}

public static String getHostIp(InetAddress netAddress) {

if (null == netAddress) {

return null;

}

String ip = netAddressgetHostAddress(); // get the ip address

return ip;

}

public static String getHostName(InetAddress netAddress) {

if (null == netAddress) {

return null;

}

String name = netAddressgetHostName(); // get the host address

return name;

}

获取本机ip地址

InetAddress addr = InetAddressgetLocalHost();

ip=addrgetHostAddress()toString;

给你个小例子希望对你有用

import javanetDatagramPacket;

import javanetDatagramSocket;

import javanetInetAddress;

public class UDPClient

{

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

{

DatagramSocket ds=new DatagramSocket();

String s="你好！";

DatagramPacket dp=new DatagramPacket(sgetBytes(),sgetBytes()length,

InetAddressgetByName("192168098"),8888);

dssend(dp);

dsclose();

}

}

import javanetDatagramPacket;

import javanetDatagramSocket;

public class UDPServet

{

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

{

DatagramSocket ds=new DatagramSocket(8888);

byte[] buf=new byte[1024];

DatagramPacket dp=new DatagramPacket(buf,buflength);

dsreceive(dp);

String str=new String(dpgetData(),0,dpgetLength())+"from"+

dpgetAddress()getHostAddress()+":"+dpgetPort();

Systemoutprintln(str);

dsclose();

}

}

import javaio;

import javautil;

import javanetInetAddress;

public class Ip{

static public HashMap ping; //ping 后的结果集

public HashMap getPing(){ //用来得到ping后的结果集

return ping;

}

//当前线程的数量, 防止过多线程摧毁电脑

static int threadCount = 0;

public Ip() {

ping = new HashMap();

}

public void Ping(String ip) throws Exception{

//最多30个线程

while(threadCount>30)

Threadsleep(50);

threadCount +=1;

PingIp p = new PingIp(ip);

pstart();

}

public void PingAll() throws Exception{

//首先得到本机的IP，得到网段

InetAddress host = InetAddressgetLocalHost();

String hostAddress = hostgetHostAddress();

int k=0;

k=hostAddresslastIndexOf("");

String ss = hostAddresssubstring(0,k+1);

for(int i=1;i <=255;i++){ //对所有局域网Ip

String iip=ss+i;

Ping(iip);

}

//等着所有Ping结束

while(threadCount>0)

Threadsleep(50);

}

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

Ip ip= new Ip();

ipPingAll();

javautilSet entries = pingentrySet();

Iterator iter=entriesiterator();

String k;

while(iterhasNext()){

MapEntry entry=(MapEntry)iternext();

String key=(String)entrygetKey();

String value=(String)entrygetValue();

if(valueequals("true"))

Systemoutprintln(key+"-->"+value);

}

}

class PingIp extends Thread{

public String ip; // IP

public PingIp(String ip){

thisip=ip;

}

public void run(){

try{

Process p= RuntimegetRuntime()exec ("ping "+ip+ " -w 300 -n 1");

InputStreamReader ir = new InputStreamReader(pgetInputStream());

LineNumberReader input = new LineNumberReader (ir);

//读取结果行

for (int i=1 ; i <7; i++)

inputreadLine();

String line= inputreadLine();

if (linelength() <17 || linesubstring(8,17)equals("timed out"))

pingput(ip,"false");

else

pingput(ip,"true");

//线程结束

threadCount -= 1;

}catch (IOException e){}

}

}

}

1得到局域网网段，可由自己机器的IP来确定 （也可以手动获取主机IP-CMD-ipconfig /all）

2根据IP类型，一次遍历局域网内IP地址

JAVA类，编译之后直接运行便可以得到局域网内所有IP,具体怎样使用你自己编写相应代码调用便可

代码如下：：

package bean;

import javaio;

import javautil;

public class Ip{

static public HashMap ping; //ping 后的结果集

public HashMap getPing(){ //用来得到ping后的结果集

return ping;

}

//当前线程的数量, 防止过多线程摧毁电脑

static int threadCount = 0;

public Ip() {

ping = new HashMap();

}

public void Ping(String ip) throws Exception{

//最多30个线程

while(threadCount>30)

Threadsleep(50);

threadCount +=1;

PingIp p = new PingIp(ip);

pstart();

}

public void PingAll() throws Exception{

//首先得到本机的IP，得到网段

InetAddress host = InetAddressgetLocalHost();

String hostAddress = hostgetHostAddress();

int k=0;

k=hostAddresslastIndexOf("");

String ss = hostAddresssubstring(0,k+1);

for(int i=1;i <=255;i++){ //对所有局域网Ip

String iip=ss+i;

Ping(iip);

}

//等着所有Ping结束

while(threadCount>0)

Threadsleep(50);

}

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

Ip ip= new Ip();

ipPingAll();

javautilSet entries = pingentrySet();

Iterator iter=entriesiterator();

String k;

while(iterhasNext()){

MapEntry entry=(MapEntry)iternext();

String key=(String)entrygetKey();

String value=(String)entrygetValue();

if(valueequals("true"))

Systemoutprintln(key+"-->"+value);

}

}

class PingIp extends Thread{

public String ip; // IP

public PingIp(String ip){

thisip=ip;

}

public void run(){

try{

Process p= RuntimegetRuntime()exec ("ping "+ip+ " -w 300 -n 1");

InputStreamReader ir = new InputStreamReader(pgetInputStream());

LineNumberReader input = new LineNumberReader (ir);

//读取结果行

for (int i=1 ; i <7; i++)

inputreadLine();

String line= inputreadLine();

if (linelength() <17 || linesubstring(8,17)equals("timed out"))

pingput(ip,"false");

else

pingput(ip,"true");

//线程结束

threadCount -= 1;

}catch (IOException e){}

}

}

}

以上就是关于JAVA怎么获取服务器IP全部的内容，包括:JAVA怎么获取服务器IP、java中怎么获取客户端的真实的ip和端口号、java里面如何获取服务器的ip地址，帮帮忙等相关内容解答，如果想了解更多相关内容，可以关注我们，你们的支持是我们更新的动力！