Ⅰ 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;
/**
* 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());
}
}
Ⅱ java如何不使用HttpServletRequest獲取電腦客戶端ip地址與Mac地址。
import java.net.InetAddress;
import java.net.NetworkInterface;
/**
*@author:
*@version:
*@description:
*/
public class Ipconfig {
public static void main(String[] args) throws Exception {
try {
InetAddress ia=InetAddress.getLocalHost();
String localname=ia.getHostName();
String localip=ia.getHostAddress();
System.out.println("本機名稱是："+ localname);
System.out.println("本機的ip是 ："+localip);
System.out.println("MAC ......... "+getMACAddress(ia));
} catch (Exception e) {
e.printStackTrace();
}
}
//獲取MAC地址的方法
private static String getMACAddress(InetAddress ia)throws Exception{
//獲得網路介面對象（即網卡），並得到mac地址，mac地址存在於一個byte數組中。
byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
//下面代碼是把mac地址拼裝成String
StringBuffer sb = new StringBuffer();
for(int i=0;i<mac.length;i++){
if(i!=0){
sb.append("-");
}
//mac[i] & 0xFF 是為了把byte轉化為正整數
String s = Integer.toHexString(mac[i] & 0xFF);
sb.append(s.length()==1?0+s:s);
}
//把字元串所有小寫字母改為大寫成為正規的mac地址並返回
return sb.toString().toUpperCase();
}
}
Ⅲ java如何獲取當前登錄ip
第一種：獲取本機的IP
Enumeration<NetworkInterface> netInterfaces = null;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
while (netInterfaces.hasMoreElements()) {
NetworkInterface ni = netInterfaces.nextElement();
System.out.println("DisplayName:" + ni.getDisplayName());
System.out.println("Name:" + ni.getName());
Enumeration<InetAddress> ips = ni.getInetAddresses();
while (ips.hasMoreElements()) {
System.out.println("IP:" + ips.nextElement().getHostAddress());
ipTemp= ni.getInetAddresses().nextElement().getHostAddress();
if(ipTemp!="127.0.0.1" && !"127.0.0.1".equals(ipTemp))
{
ip=ipTemp;
}
}
}
}catch(Exception ee)
{
ee.printStackTrace();
}
第二種：也是本機的：
InetAddress addr = InetAddress.getLocalHost();
ip=addr.getHostAddress().toString();//獲得本機IP
Ⅳ java IP查詢方法
Java編程查詢IP地址歸屬地，可以調用淘寶提供的service查詢，並且解析http請求返回的json串，代碼如下：
packagegetAddressByIp;
importjava.io.ByteArrayOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.net.HttpURLConnection;
importjava.net.MalformedURLException;
importjava.net.URL;
importnet.sf.json.JSONObject;
publicclassGetAddressByIp
{
/**
*
*@paramIP
*@return
*/
(StringIP){
Stringresout="";
try{
Stringstr=getJsonContent("http://ip.taobao.com/service/getIpInfo.php?ip="+IP);
System.out.println(str);
JSONObjectobj=JSONObject.fromObject(str);
JSONObjectobj2=(JSONObject)obj.get("data");
Stringcode=(String)obj.get("code");
if(code.equals("0")){
resout=obj2.get("country")+"--"+obj2.get("area")+"--"+obj2.get("city")+"--"+obj2.get("isp");
}else{
resout="IP地址有誤";
}
}catch(Exceptione){
e.printStackTrace();
resout="獲取IP地址異常："+e.getMessage();
}
returnresout;
}
(StringurlStr)
{
try
{//獲取HttpURLConnection連接對象
URLurl=newURL(urlStr);
HttpURLConnectionhttpConn=(HttpURLConnection)url.openConnection();
//設置連接屬性
httpConn.setConnectTimeout(3000);
httpConn.setDoInput(true);
httpConn.setRequestMethod("GET");
//獲取相應碼
intrespCode=httpConn.getResponseCode();
if(respCode==200)
{
returnConvertStream2Json(httpConn.getInputStream());
}
}
catch(MalformedURLExceptione)
{
e.printStackTrace();
}
catch(IOExceptione)
{
e.printStackTrace();
}
return"";
}
(InputStreaminputStream)
{
StringjsonStr="";
//ByteArrayOutputStream相當於內存輸出流
ByteArrayOutputStreamout=newByteArrayOutputStream();
byte[]buffer=newbyte[1024];
intlen=0;
//將輸入流轉移到內存輸出流中
try
{
while((len=inputStream.read(buffer,0,buffer.length))!=-1)
{
out.write(buffer,0,len);
}
//將內存流轉換為字元串
jsonStr=newString(out.toByteArray());
}
catch(IOExceptione)
{
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
returnjsonStr;
}
}