Android 获取本地外网IP、内网IP、计算机名等信息

一、获取本地外网IP
 

public static String GetNetIp()
	{
	    URL infoUrl = null;
	    InputStream inStream = null;
	    try
	    {
	    	//http://iframe.ip138.com/ic.asp
	        //infoUrl = new URL("http://city.ip138.com/city0.asp");
	        infoUrl = new URL("http://iframe.ip138.com/ic.asp");
	        URLConnection connection = infoUrl.openConnection();
	        HttpURLConnection httpConnection = (HttpURLConnection)connection;
	        int responseCode = httpConnection.getResponseCode();
	        if(responseCode == HttpURLConnection.HTTP_OK)
	        { 
	            inStream = httpConnection.getInputStream(); 
	            BufferedReader reader = new BufferedReader(new InputStreamReader(inStream,"utf-8"));
	            StringBuilder strber = new StringBuilder();
	            String line = null;
	            while ((line = reader.readLine()) != null) 
	                strber.append(line + "\n");
	            inStream.close();
	            //从反馈的结果中提取出IP地址
	            int start = strber.indexOf("[");
	            int end = strber.indexOf("]", start + 1);
	            line = strber.substring(start + 1, end);
	            return line; 
	        }
	    }
	    catch(MalformedURLException e) {
	        e.printStackTrace();
	    }
	    catch (IOException e) {
	        e.printStackTrace();
	    }
	    return null;
	}

 

二、 获取本地内网IP

 

// 获取本地IP函数
		public static String getLocalIPAddress() {
			try {
				for (Enumeration<NetworkInterface> mEnumeration = NetworkInterface
						.getNetworkInterfaces(); mEnumeration.hasMoreElements();) {
					NetworkInterface intf = mEnumeration.nextElement();
					for (Enumeration<InetAddress> enumIPAddr = intf
							.getInetAddresses(); enumIPAddr.hasMoreElements();) {
						InetAddress inetAddress = enumIPAddr.nextElement();
						// 如果不是回环地址
						if (!inetAddress.isLoopbackAddress()) {
							// 直接返回本地IP地址
							return inetAddress.getHostAddress().toString();
						}
					}
				}
			} catch (SocketException ex) {
				System.err.print("error");
			}
			return null;
		}

 三、 获取本地外网IP、内网IP、计算机名等信息

/**
 *功能: 获取外网IP，内网IP，计算机名等信息;
 * 
 *作者: jef
 * 
 *时间: 20100714
 * 
 *版本: v1.0.0
 * 
 * 
 *程序说明:
 *  	通过纯真网络来获取IP，因为ip138网站有时不准。
 *  
 *  	运行程序时命令行参数请输入http://www.cz88.net/ip/viewip778.aspx
 *  	等待程序运行完毕(执行时间视网络情况而定)，会在程序目录下生成一个GETIP.sys文件来输出各参数。
 *  
 *  	运行时如果不输入命令行参数，则默认使用http://www.cz88.net/ip/viewip778.aspx来获取IP。
 *  
 *  	注意,
 *  	不输入命令行参数时获取的信息会输出到命令行，不会输出到文件。
 *  	输入命令行参数时获取的信息则会输出到文件，不管获取IP成功与否。
 *  
 *  	输出信息部分内容的含义如下,
 *  	sucess
 *  	hostName is:MyPC
 *  	hostAddr is:192.168.1.114
 * 		Foreign IP is:210.72.100.9
 *  	Location is:江苏省苏州 长城宽带
 *  	......
 *  
 *  	第一行表示全部过程成功与否。成功输出"sucess"，否则"fail",
 *  	第二行表示计算机名,
 *  	第三行表示内网IP,
 *  	第四行表示外网IP,
 *  	第五行表示外网IP所有的可能地理位置(可信度依赖于查询的网站)。
 *  	......
 *  
 *  
 *使用举例:
 *   	拷贝 \cn\mail\sendback\GetIP.class 文件到C:\Documents and Settings下。注意要保留包名的目录。
 *   	打开命令提示行窗口,输入:
 *   
 *   	c:
 *   	cd C:\Documents and Settings
 *   	java cn.mail.sendback.GetIP http://www.cz88.net/ip/viewip778.aspx
 *   
 *   	等待C:\Documents and Settings目录下出现GETIP.sys文件则表示执行完毕，
 *   	用记事本打开该文件。含义见说明部分。
 *   
 */


package com.soai.test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.URL;
import java.net.UnknownHostException;
import java.util.Date;

public class GetIP {

	/**
	 * @param args
	 */
	public static void main(String[] args){
		// 通过纯真网络来获取IP，因为ip138网站有时不准。
		// 运行程序时命令行输入:http://www.cz88.net/ip/viewip778.aspx

		boolean bHasNoArgs =false;
		if(args.length<=0) bHasNoArgs =true;

		StringBuffer sbFileContent =new StringBuffer();
		boolean bGetSuccess =true;
		
		try {
			InetAddress host =InetAddress.getLocalHost();
			
			String hostName =host.getHostName();
			String hostAddr=host.getHostAddress();
			String tCanonicalHostName =host.getCanonicalHostName();

			Date da =new Date();
			String osname =System.getProperty("os.name");
			String osversion =System.getProperty("os.version");
			String username =System.getProperty("user.name");
			String userhome =System.getProperty("user.home");
			String userdir =System.getProperty("user.dir");
			
			if(bHasNoArgs){
				System.out.println("hostName is:"+hostName);
				System.out.println("hostAddr is:"+hostAddr);

				System.out.println("Current Date is:"+da.toString());
				System.out.println("osname is:"+osname);
				System.out.println("osversion is:"+osversion);
				System.out.println("username is:"+username);
				System.out.println("userhome is:"+userhome);
				System.out.println("userdir is:"+userdir);
			}
			else{
				sbFileContent.append("hostName is:"+hostName+"\n");
				sbFileContent.append("hostAddr is:"+hostAddr+"\n");
				
				sbFileContent.append("Current Date is:"+da.toString()+"\n");
				sbFileContent.append("osname is:"+osname+"\n");
				sbFileContent.append("osversion is:"+osversion+"\n");
				sbFileContent.append("username is:"+username+"\n");
				sbFileContent.append("userhome is:"+userhome+"\n");
				sbFileContent.append("userdir is:"+userdir+"\n");
			}
			
			StringBuffer url =new StringBuffer();
			if(bHasNoArgs||args[0].equals(null)||args[0].equals("")){
				url.append("http://www.cz88.net/ip/viewip778.aspx");
			}
			else
				url.append(args[0]);
			StringBuffer strForeignIP =new StringBuffer("strForeignIPUnkown");
			StringBuffer strLocation =new StringBuffer("strLocationUnkown");
			
			
			if(GetIP.getWebIp(url.toString(),strForeignIP,strLocation)){
				if(bHasNoArgs){
					System.out.println("Foreign IP is:"+strForeignIP);
					System.out.println("Location is:"+strLocation);
				}
				else{
					sbFileContent.append("Foreign IP is:"+strForeignIP+"\n");
					sbFileContent.append("Location is:"+strLocation+"\n");
				}
			}
			else{
				if(bHasNoArgs){
					System.out.println("Failed to connect:"+url);
				}
				else{
					bGetSuccess =false;
					sbFileContent.append("Failed to connect:"+url+"\n");
				}
			}
			
			
		} catch (UnknownHostException e) {
			if(bHasNoArgs){
				e.printStackTrace();
			}
			else{
				bGetSuccess =false;
				sbFileContent.append(e.getStackTrace()+"\n");
			}
		}
		
		
		if(bGetSuccess)
			sbFileContent.insert(0,"sucess"+"\n");
		else
			sbFileContent.insert(0,"fail"+"\n");
			
		if(!bHasNoArgs) write2file(sbFileContent);
		
	}

	
	 public static boolean getWebIp(String strUrl,
			 StringBuffer strForeignIP,StringBuffer strLocation) {
		  try {

		   URL url = new URL(strUrl);

		   BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));

		   String s = "";
		   StringBuffer sb = new StringBuffer("");
		   while ((s = br.readLine()) != null) {
		    sb.append(s + "\r\n");
		   }
		   br.close();
		   
		   String webContent = "";
		   webContent = sb.toString();
		   
		   if( webContent.equals(null)|| webContent.equals("") ) return false;
		  
		   
		   
		   String flagofForeignIPString ="IPMessage";
		   int startIP = webContent.indexOf(flagofForeignIPString)+flagofForeignIPString.length()+2;
		   int endIP = webContent.indexOf("</span>",startIP);
		   strForeignIP.delete(0, webContent.length());
		   strForeignIP.append(webContent.substring(startIP,endIP));

		   String flagofLocationString ="AddrMessage";
		   int startLoc = webContent.indexOf(flagofLocationString)+flagofLocationString.length()+2;
		   int endLoc = webContent.indexOf("</span>",startLoc);
		   strLocation.delete(0, webContent.length());
		   strLocation.append(webContent.substring(startLoc,endLoc));		   
		   
		   return true;

		  } catch (Exception e) {
		   //e.printStackTrace();
		   return false;
		  }
		 }	
	 

	 public static void  write2file(StringBuffer content){

		 if(content.length()<=0) return;
		 
			try {
				FileOutputStream fos = new FileOutputStream("GETIP.sys");
				OutputStreamWriter osr =new OutputStreamWriter(fos);
				BufferedWriter bw =new BufferedWriter(osr);	
				
				try {
					int index =0;
					while(index>=0){
						int preIndex =index;
						index =content.indexOf("\n", preIndex+2);
						
						if(index>0){
							String str =new String(content.substring(preIndex, index));
							bw.write(str);
							bw.newLine();
						}
						else{
							String str =new String(content.substring(preIndex, content.length()-1));
							bw.write(str);
							break;
						}
					}
					
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					//e1.printStackTrace();
				}
				
				try {
					bw.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					//e.printStackTrace();
				}
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				//e.printStackTrace();
			}
	 }
}