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javaip代码,java ip
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求java获取手机ip或者平板ip的代码
//获取ip地址
public String getLocalIpAddress()
{
try {
String ipv4;
ArrayListNetworkInterface nilist = Collections.list(NetworkInterface.getNetworkInterfaces());
for (NetworkInterface ni: nilist)
{
ArrayListInetAddress ialist = Collections.list(ni.getInetAddresses());
for (InetAddress address: ialist)
{
if (!address.isLoopbackAddress() InetAddressUtils.isIPv4Address(ipv4=address.getHostAddress()))
{
return ipv4;
}
}
}
} catch (SocketException ex)
{
//Log.e(LOG_TAG, ex.toString());
}
return null;
}
相关问答
Q1: 谁清楚java代码获取ip地址方法是什么
1、如果服务器如果没有采用反向代理，而且客户端没有用正向代理的话，那么可以获取客户端的真实IP地址request.getRemoteAddr()
2、如果服务器如果没有采用反向代理，而且客户端有用正向代理的话，那么通过request.getRemoteAddr()获取客户端的IP地址是客户端 的代理服务器的地址，并不是客户端的真实地址
3、如果客户端使用的是多层代理的话，服务器获得的客户端地址是客户端的最外围代理服务器的地址如果服务器如果采用反向代理服务器，不管客户端采用的是何种方式访问服务器
Q2: java获取局域网ip地址 具体代码
import java.io.*;
import java.util.*;
import java.net.InetAddress;
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(threadCount30)
Thread.sleep(50);
threadCount +=1;
PingIp p = new PingIp(ip);
p.start();
}
public void PingAll() throws Exception{
//首先得到本机的IP，得到网段
InetAddress host = InetAddress.getLocalHost();
String hostAddress = host.getHostAddress();
int k=0;
k=hostAddress.lastIndexOf(".");
String ss = hostAddress.substring(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(threadCount0)
Thread.sleep(50);
}
public static void main(String[] args) throws Exception{
Ip ip= new Ip();
ip.PingAll();
java.util.Set entries = ping.entrySet();
Iterator iter=entries.iterator();
String k;
while(iter.hasNext()){
Map.Entry entry=(Map.Entry)iter.next();
String key=(String)entry.getKey();
String value=(String)entry.getValue();
if(value.equals("true"))
System.out.println(key+"--"+value);
}
}
class PingIp extends Thread{
public String ip; // IP
public PingIp(String ip){
this.ip=ip;
}
public void run(){
try{
Process p= Runtime.getRuntime().exec ("ping "+ip+ " -w 300 -n 1");
InputStreamReader ir = new InputStreamReader(p.getInputStream());
LineNumberReader input = new LineNumberReader (ir);
//读取结果行
for (int i=1 ; i 7; i++)
input.readLine();
String line= input.readLine();
if (line.length() 17 || line.substring(8,17).equals("timed out"))
ping.put(ip,"false");
else
ping.put(ip,"true");
//线程结束
threadCount -= 1;
}catch (IOException e){}
}
}
}
Q3: 用java语言，写一段代码，比较两个ip地址的大小
你好，可以把IP去掉‘.’,然后再比较
private bool validateIP(string startIP,string endIP)
{
// 分离出ip中的四个数字位
string[] startIPArray = startIP.Split('.');
string[] endIPArray = endIP.Split('.');
// 取得各个数字
long[] startIPNum = new long[4];
long[] endIPNum = new long[4];
for (int i = 0; i 4; i++)
{
startIPNum[i] = long.Parse(startIPArray[i].Trim());
endIPNum[i] = long.Parse(endIPArray[i].Trim());
}
// 各个数字乘以相应的数量级
long startIPNumTotal = startIPNum[0] * 256 * 256 * 256 + startIPNum[1] * 256 * 256 + startIPNum[2] * 256 + startIPNum[3];
long endIPNumTotal = endIPNum[0] * 256 * 256 * 256 + endIPNum[1] * 256 * 256 + endIPNum[2] * 256 + endIPNum[3];
if (startIPNumTotal endIPNumTotal)
{
return false;
}
else
{
return true;
}
}
Q4: 局域网中的电脑如何用java代码取得出口IP?
public class GetRealIp {
public static void main(String[] args) throws SocketException {
System.out.println(GetRealIp.getRealIp());
}
public static String getRealIp() throws SocketException {
String localip = null;// 本地IP，如果没有配置外网IP则返回它
String netip = null;// 外网IP
EnumerationNetworkInterface netInterfaces =
NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;
boolean finded = false;// 是否找到外网IP
while (netInterfaces.hasMoreElements() !finded) {
NetworkInterface ni = netInterfaces.nextElement();
EnumerationInetAddress address = ni.getInetAddresses();
while (address.hasMoreElements()) {
ip = address.nextElement();
if (!ip.isSiteLocalAddress()
!ip.isLoopbackAddress()
ip.getHostAddress().indexOf(":") == -1) {// 外网IP
netip = ip.getHostAddress();
finded = true;
break;
} else if (ip.isSiteLocalAddress()
!ip.isLoopbackAddress()
ip.getHostAddress().indexOf(":") == -1) {// 内网IP
localip = ip.getHostAddress();
}
}
}
if (netip != null !"".equals(netip)) {
return netip;
} else {
return localip;
}
}
}
自己写了一个帮你实现，希望对你有帮助
