package com.lovo.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class PublicInterIp {
	/**
	 * @param args
	 * @throws Exception
	 */
	public String getPublicIp() {
		try {
			String path = "http://iframe.ip138.com/ic.asp";// 要获得html页面内容的地址

			URL url = new URL(path);// 创建url对象

			HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 打开连接

			conn.setRequestProperty("contentType", "GBK"); // 设置url中文参数编码

			conn.setConnectTimeout(5 * 1000);// 请求的时间

			conn.setRequestMethod("GET");// 请求方式

			InputStream inStream = conn.getInputStream();
			// readLesoSysXML(inStream);

			BufferedReader in = new BufferedReader(new InputStreamReader(
					inStream, "GBK"));
			StringBuffer buffer = new StringBuffer();
			String line = "";
			// 读取获取到内容的最后一行,写入
			while ((line = in.readLine()) != null) {
				buffer.append(line);
			}
			String str = buffer.toString();
			String ipString1 = str.substring(str.indexOf("[")); 
			// 获取你的IP是中间的[182.149.82.50]内容
			String ipsString2 = ipString1.substring(ipString1.indexOf("[") + 1,
					ipString1.lastIndexOf("]"));
			//获取当前IP地址所在地址
		/*	String ipsString3=ipString1.substring(ipString1.indexOf(": "),ipString1.lastIndexOf("</center>"));
			System.err.println(ipsString3);*/
			
			// 返回公网IP值
			return ipsString2;

		} catch (Exception e) {
			System.out.println("获取公网IP连接超时");
			return "连接超时";
		}
	}
	public static void main(String[] args)  { 
		PublicInterIp interIp=new PublicInterIp();
		System.err.println(interIp.getPublicIp());
	}
}

java 获取公网(外网IP）很实用！,布布扣,bubuko.com

java 获取公网(外网IP）很实用！