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();
}
}
}

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Android 获取本地外网IP、内网IP、计算机名等信息

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