java外網ip
『壹』 java如何獲得外網IP地址
java獲取外網ip地址方法：
public class Main {
public static void main(String[] args) throws SocketException {
System.out.println(Main.getRealIp());
}
public static String getRealIp() throws SocketException {
String localip = null;// 本地IP，如果沒有配置外網IP則返回它
String netip = null;// 外網IP
Enumeration<NetworkInterface> netInterfaces =
NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;
boolean finded = false;// 是否找到外網IP
while (netInterfaces.hasMoreElements() && !finded) {
NetworkInterface ni = netInterfaces.nextElement();
Enumeration<InetAddress> address = ni.getInetAddresses();
while (address.hasMoreElements()) {
ip = address.nextElement();
if (!ip.isSiteLocalAddress()
&& !ip.isLoopbackAddress()
&& ip.getHostAddress().indexOf(":") == -1) {// 外網IP
netip = ip.getHostAddress();
finded = true;
break;
} else if (ip.isSiteLocalAddress()
&& !ip.isLoopbackAddress()
&& ip.getHostAddress().indexOf(":") == -1) {// 內網IP
localip = ip.getHostAddress();
}
}
}
if (netip != null && !"".equals(netip)) {
return netip;
} else {
return localip;
}
}
}
『貳』 Java編程 怎樣獲得自己在外網的真實ip
指定IP的MAC 代碼如下:
System.out.println("192.168.1.187對應網卡的MAC是:");NetworkInterface ne=NetworkInterface.getByInetAddress(InetAddress.getByName("192.168.1.187"));byte[]mac=ne.getHardwareAddress();String mac_s=hexByte(mac[0])+":"+hexByte(mac[1])+":"+ hexByte(mac[2])+":"+hexByte(mac[3])+":"+ hexByte(mac[4])+":"+hexByte(mac[5]);System.out.println(mac_s); 程序運行結果: 192.168.1.187對應網卡的MAC是: 00:0c:f1:20:75:58
工作組和計算機名字類似，可以到庫里找
『叄』 JAVA獲取外網IP
請參考以下代碼，可以獲得任意給定網卡的ip地址：
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
public class InternetTest {
public static void main(String[] args) {
String netCard = "lo";
try {
Enumeration<NetworkInterface> netInterfaces = NetworkInterface
.getNetworkInterfaces();
if (netInterfaces.hasMoreElements()) {
NetworkInterface netInterface = netInterfaces.nextElement();
if (netCard.equals(netInterface.getName())) {
// 子介面，linux下會取到父介面？？
Enumeration<NetworkInterface> subnetInterfaces = netInterface
.getSubInterfaces();
while (subnetInterfaces.hasMoreElements()) {
NetworkInterface subnetInterface = subnetInterfaces
.nextElement();
System.out.println(subnetInterface.getName());
Enumeration<InetAddress> subaddresses = netInterface
.getInetAddresses();
while (subaddresses.hasMoreElements()) {
InetAddress subaddress = subaddresses.nextElement();
System.out.println(subaddress.getHostAddress());
}
}
// 列印介面下所有IP
System.out.println(netInterface.getName());
Enumeration<InetAddress> addresses = netInterface
.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress address = addresses.nextElement();
System.out.println(address.getHostAddress());
}
}
}
} catch (SocketException e) {
e.printStackTrace();
}
}
}
『肆』 java如何獲取公網ip
在外網上放一個Servlet來顯示訪問者IP
你的程序來訪問這個servlet
『伍』 我在本機上，想寫一個java程序獲取我本機的外網ip地址，如何搞
import java.net.*;
public class Test {
public static void main(String[] args) throws UnknownHostException {
String IP = null;
String host = null;
InetAddress ia;
ia = InetAddress.getLocalHost();
host = ia.getHostName();// 獲取計算機名字
IP = ia.getHostAddress();// 獲取IP
System.out.println(host);
System.out.println(IP);
}
}
『陸』 java中，serversocket如何綁定雲伺服器外網IP
Client端直接創建socket的時候指定伺服器IP和埠號public class Client {private Socket socket;private BufferedReader input ;public void getConnect() throws Exception{//獲得伺服器鏈接，第一個參數是IP地址，第二個參數是埠號socket = new Socket("127.0.0.1", 8080);//獲得輸入流，這里會拋出異常input = new BufferedReader(new InputStreamReader(socket.getInputStream()));/* * 這里是你自己寫獲得數據即可 * */input.close();//可以選擇是否關閉鏈接socket.close();}}
『柒』 java中如何獲取到本機的外網ip地址
java獲取本機的外網ip示例：
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 獲取本機外網IP地址
* 思想是訪問網站http://checkip.dyndns.org/，得到返回的文本後解析出本機在外網的IP地址
* @author pieryon
*
*/
public class ExternalIpAddressFetcher {
// 外網IP提供者的網址
private String externalIpProviderUrl;
// 本機外網IP地址
private String myExternalIpAddress;
public ExternalIpAddressFetcher(String externalIpProviderUrl) {
this.externalIpProviderUrl = externalIpProviderUrl;
String returnedhtml = fetchExternalIpProviderHTML(externalIpProviderUrl);
parse(returnedhtml);
}
/**
* 從外網提供者處獲得包含本機外網地址的字元串
* 從http://checkip.dyndns.org返回的字元串如下
* <html><head><title>Current IP Check</title></head><body>Current IP Address: 123.147.226.222</body></html>
* @param externalIpProviderUrl
* @return
*/
private String fetchExternalIpProviderHTML(String externalIpProviderUrl) {
// 輸入流
InputStream in = null;
// 到外網提供者的Http連接
HttpURLConnection httpConn = null;
try {
// 打開連接
URL url = new URL(externalIpProviderUrl);
httpConn = (HttpURLConnection) url.openConnection();
// 連接設置
HttpURLConnection.setFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("User-Agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");
// 獲取連接的輸入流
in = httpConn.getInputStream();
byte[] bytes=new byte[1024];// 此大小可根據實際情況調整
// 讀取到數組中
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead=in.read(bytes, offset, bytes.length-offset)) >= 0) {
offset += numRead;
}
// 將位元組轉化為為UTF-8的字元串
String receivedString=new String(bytes,"UTF-8");
// 返回
return receivedString;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
in.close();
httpConn.disconnect();
} catch (Exception ex) {
ex.printStackTrace();
}
}
// 出現異常則返回空
return null;
}
/**
* 使用正則表達式解析返回的HTML文本,得到本機外網地址
* @param html
*/
private void parse(String html){
Pattern pattern=Pattern.compile("(\\d{1,3})[.](\\d{1,3})[.](\\d{1,3})[.](\\d{1,3})", Pattern.CASE_INSENSITIVE);
Matcher matcher=pattern.matcher(html);
while(matcher.find()){
myExternalIpAddress=matcher.group(0);
}
}
/**
* 得到本機外網地址,得不到則為空
* @return
*/
public String getMyExternalIpAddress() {
return myExternalIpAddress;
}
public static void main(String[] args){
ExternalIpAddressFetcher fetcher=new ExternalIpAddressFetcher("http://checkip.dyndns.org/");
System.out.println(fetcher.getMyExternalIpAddress());
}
}
『捌』 Java怎樣獲取當前機器外網IP
java獲取本機的外網ip示例：
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
『玖』 java如何獲取公網ip，有通過路由
如果要通過路由器，不同的路由器的獲取方法不一樣。通用的做法是通過 HttpClient 在網路上搜索關鍵字 ip, 然後提取出公網ip。
importjava.io.BufferedReader;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.InputStreamReader;
importjava.net.URL;
importjava.net.URLConnection;
importjava.util.regex.Matcher;
importjava.util.regex.Pattern;
publicclassApp{
//獲取網頁源碼
staticStringhttpGet(Stringurl){
StringBufferbuffer=newStringBuffer();
try{
URLConnectionconn=newURL(url).openConnection();
conn.addRequestProperty("User-Agent","Mozilla/5.0(WindowsNT10.0;Win64;x64)AppleWebKit/537.36(KHTML,likeGecko)Chrome/67.0.3396.99Safari/537.36");
try(InputStreaminputStream=conn.getInputStream();
InputStreamReaderstreamReader=newInputStreamReader(inputStream);
BufferedReaderreader=newBufferedReader(streamReader);){
Stringline=null;
while((line=reader.readLine())!=null){
buffer.append(line).append(System.lineSeparator());
}
}
}catch(IOExceptione){
e.printStackTrace();
}
returnbuffer.toString();
}
publicstaticvoidmain(String[]args){
Stringhtml=httpGet("https://www..com/s?wd=ip");
//提出IP
Patternpattern=Pattern.compile("<span\sclass="c-gap-right">本機IP: ([^<]+)</span>");
Matchermatcher=pattern.matcher(html);
if(matcher.find()){
Stringip=matcher.group(1);
System.out.println(ip);
}
}
}