Ⅰ java怎样获取当前机器外网IP
java获取本机的外网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;
/**
* 获取本机外网IP地址
* 思想是访问网站http://checkip.dyndns.org/，得到返回的文本后解析出本机在外网的IP地址
* @author pieryon
*
*/
public class ExternalIpAddressFetcher {
// 外网IP提供者的网址
private String externalIpProviderUrl;
// 本机外网IP地址
private String myExternalIpAddress;
public ExternalIpAddressFetcher(String externalIpProviderUrl) {
this.externalIpProviderUrl = externalIpProviderUrl;
String returnedhtml = fetchExternalIpProviderHTML(externalIpProviderUrl);
parse(returnedhtml);
}
/**
* 从外网提供者处获得包含本机外网地址的字符串
* 从http://checkip.dyndns.org返回的字符串如下
* <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) {
// 输入流
InputStream in = null;
// 到外网提供者的Http连接
HttpURLConnection httpConn = null;
try {
// 打开连接
URL url = new URL(externalIpProviderUrl);
httpConn = (HttpURLConnection) url.openConnection();
// 连接设置
HttpURLConnection.setFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("User-Agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");
// 获取连接的输入流
in = httpConn.getInputStream();
byte[] bytes=new byte[1024];// 此大小可根据实际情况调整
// 读取到数组中
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead=in.read(bytes, offset, bytes.length-offset)) >= 0) {
offset += numRead;
}
// 将字节转化为为UTF-8的字符串
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();
}
}
// 出现异常则返回空
return null;
}
/**
* 使用正则表达式解析返回的HTML文本,得到本机外网地址
* @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);
}
}
/**
* 得到本机外网地址,得不到则为空
* @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获取电脑客户端ip地址与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("本机名称是："+ localname);
System.out.println("本机的ip是 ："+localip);
System.out.println("MAC ......... "+getMACAddress(ia));
} catch (Exception e) {
e.printStackTrace();
}
}
//获取MAC地址的方法
private static String getMACAddress(InetAddress ia)throws Exception{
//获得网络接口对象（即网卡），并得到mac地址，mac地址存在于一个byte数组中。
byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
//下面代码是把mac地址拼装成String
StringBuffer sb = new StringBuffer();
for(int i=0;i<mac.length;i++){
if(i!=0){
sb.append("-");
}
//mac[i] & 0xFF 是为了把byte转化为正整数
String s = Integer.toHexString(mac[i] & 0xFF);
sb.append(s.length()==1?0+s:s);
}
//把字符串所有小写字母改为大写成为正规的mac地址并返回
return sb.toString().toUpperCase();
}
}
Ⅲ java如何获取当前登录ip
第一种：获取本机的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();
}
第二种：也是本机的：
InetAddress addr = InetAddress.getLocalHost();
ip=addr.getHostAddress().toString();//获得本机IP
Ⅳ java IP查询方法
Java编程查询IP地址归属地，可以调用淘宝提供的service查询，并且解析http请求返回的json串，代码如下：
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地址有误";
}
}catch(Exceptione){
e.printStackTrace();
resout="获取IP地址异常："+e.getMessage();
}
returnresout;
}
(StringurlStr)
{
try
{//获取HttpURLConnection连接对象
URLurl=newURL(urlStr);
HttpURLConnectionhttpConn=(HttpURLConnection)url.openConnection();
//设置连接属性
httpConn.setConnectTimeout(3000);
httpConn.setDoInput(true);
httpConn.setRequestMethod("GET");
//获取相应码
intrespCode=httpConn.getResponseCode();
if(respCode==200)
{
returnConvertStream2Json(httpConn.getInputStream());
}
}
catch(MalformedURLExceptione)
{
e.printStackTrace();
}
catch(IOExceptione)
{
e.printStackTrace();
}
return"";
}
(InputStreaminputStream)
{
StringjsonStr="";
//ByteArrayOutputStream相当于内存输出流
ByteArrayOutputStreamout=newByteArrayOutputStream();
byte[]buffer=newbyte[1024];
intlen=0;
//将输入流转移到内存输出流中
try
{
while((len=inputStream.read(buffer,0,buffer.length))!=-1)
{
out.write(buffer,0,len);
}
//将内存流转换为字符串
jsonStr=newString(out.toByteArray());
}
catch(IOExceptione)
{
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
returnjsonStr;
}
}