Java获取本机名称 ip 外网ip - yiyixiaozhi/readingNotes GitHub Wiki

package com.vito.test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {

public static void main(String[] args) {
// TODO Auto-generated method stub
// InetAddress ia=null;
// try {
// ia=ia.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);
// } catch (Exception e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
try {
String ip1 = getV4IP();
System.out.println("myIP:" + ip1);
String ip2 = getMyIPLocal();
System.out.println("myLocalIP:" + ip2);
} catch (IOException e1) {
e1.printStackTrace();
}
}

public static String getV4IP(){
String ip = "";
String chinaz = "http://ip.chinaz.com";

StringBuilder inputLine = new StringBuilder();
String read = "";
URL url = null;
HttpURLConnection urlConnection = null;
BufferedReader in = null;
try {
url = new URL(chinaz);
urlConnection = (HttpURLConnection) url.openConnection();
in = new BufferedReader( new InputStreamReader(urlConnection.getInputStream(),"UTF-8"));
while((read=in.readLine())!=null){
inputLine.append(read+"\r\n");
}
//System.out.println(inputLine.toString());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
if(in!=null){
try {
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

Pattern p = Pattern.compile("\\<dd class\\=\"fz24\">(.*?)\\<\\/dd>");
Matcher m = p.matcher(inputLine.toString());
if(m.find()){
String ipstr = m.group(1);
ip = ipstr;
//System.out.println(ipstr);
}
return ip;
}

private static String getMyIPLocal() throws IOException {
InetAddress ia = InetAddress.getLocalHost();
return ia.getHostAddress();
}
}