java获取公网ip以及物理地址和代理商

 package ipconfig;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;

 public class gainInformation {
     public static void main(String args[]) {
         String publicip = getip.publicip();
         int ipindex1 = publicip.indexOf("[");
         int ipindex2 = publicip.indexOf("]");
         String ip = publicip.substring(ipindex1+1, ipindex2);
         System.out.println(ip);
         int address1 = publicip.indexOf("来自：");
         int address2 = publicip.indexOf("</center>");
         String substring = publicip.substring(address1+3,address2);
         String[] split = substring.split(" ");
         for (int i = 0; i < split.length; i++) {
             System.out.println(split[i]);
         }
     }
 }
     class getip{
     public static String publicip() {
         BufferedReader br = null;
         try {
             URL url = new URL("http://20019.ip138.com/ic.asp");
             URLConnection urlconn = url.openConnection();
             br = new BufferedReader(new InputStreamReader(urlconn.getInputStream()));
             String buf,get = null;
             while ((buf = br.readLine()) != null) {
                 get+=buf;
             }
             return get;
         } catch (MalformedURLException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         } finally {
             try {
                 br.close();
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
         return null;
     }
 }