Atitit.獲取某個服務 網路鄰居列表 解決方案

原理，帶入某個ip掃描從0---255

很快，多線程幾秒就可以出來。

使用CountDownLatch來join線程..

返回  [{

"ip":"192.168.2.114",

"url":"http://@ip@:8080/cms/list_detail.html"

}]

作者::  ★(attilax)>>>   綽號:老哇的爪子 （ 全名：：Attilax Akbar Al Rapanui 阿提拉克斯 阿克巴 阿爾 拉帕努伊 ） 漢字名：艾龍，  EMAIL:[email protected]

轉載請註明來源： http://www.cnblogs.com/attilax/

package com.attilax.net;

import java.net.InetAddress;

import java.net.UnknownHostException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.concurrent.CountDownLatch;

import javax.management.RuntimeErrorException;

import com.attilax.core;

import com.attilax.json.AtiJson;

import com.attilax.lang.text.strUtil;

import com.csmy.my.center.util.zto.HttpUtil;

public class IPUtil {

public  List<Map> urls=new ArrayList<Map>();

public static void main(String[] args) throws UnknownHostException {

// System.out.println( getIp());

String url = "http://@ip@:8080/cms/list_detail.html";

IPUtil ipx=new IPUtil();

 List<Map> urls2 =  ipx.getActIp(url);

 System.out.println(  AtiJson.toJson(urls2));

////////

}

public    List<Map> getActIp(final String url)  {

//String a = subnet_url("http://192.168.0.111/lime/aa.jsp");

//System.out.println(a);

// 192.168.2.114

String ip;

try {

ip = InetAddress.getLocalHost().getHostAddress();

} catch (UnknownHostException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

throw new RuntimeException(e1);

}

System.out.println(ip);

String subnet = subnet(ip);

System.out.println(subnet);

//String okIp = "";

        CountDownLatch end = new CountDownLatch(254);

for (int i = 1; i < 255; i++) {

final int tmp_i=i;

Runnable runnable = new Runnable() {

@Override

public void run() {

try {

String ip_item = subnet + "." + String.valueOf(tmp_i);

Stringurl2 = url.replace("@ip@", ip_item);

System.out.println(url2);

HttpUtil.sendGet(url2);

//okIp = url;

Map  m=new HashMap();

m.put("ip", ip_item);

m.put("url", url);

 urls.add(m);

} catch (Exception e) {

// e.printStackTrace();

String ip_item = subnet + "." + String.valueOf(tmp_i);

System.out.println( ip_item+ "err:"+e.getMessage() );

}

 end.countDown();

}

};

core.execMeth_Ays(runnable, "threadName"+String.valueOf(i));

}

        try{

            end.await();            //等待end狀態變為0，即為比賽結束

        }catch (InterruptedException e) {

         throw new RuntimeException(e);

        }finally{

            System.out.println("Race ends!");

        }

      //  exe.shutdown();

return  this.urls;

}

/**

 * ret subnet from url

 * @param url

 * @return

 */

public static String  subnet_url(String url) {

String[] a=strUtil.splitByMultiChar(url, "//,/");

String host_port=a[1];

return subnet(host_port);

}

public static String subnet(String host_port) {

int lastIdx=host_port.lastIndexOf(".");

return host_port.substring(0,lastIdx);

}

public static boolean isInternalIp(String ipAddress){    

        boolean isInnerIp = false;    

        long ipNum = getIpNum(ipAddress);    

        /**   

        私有IP：

               A類  10.0.0.0-10.255.255.255   

               B類  172.16.0.0-172.31.255.255   

               C類  192.168.0.0-192.168.255.255   

        **/   

        long aBegin = getIpNum("10.0.0.0");    

        long aEnd = getIpNum("10.255.255.255");    

        long bBegin = getIpNum("172.16.0.0");    

        long bEnd = getIpNum("172.31.255.255");    

        long cBegin = getIpNum("192.168.0.0");    

        long cEnd = getIpNum("192.168.255.255");    

        isInnerIp = isInnerIp(ipNum,aBegin,aEnd) || isInnerIp(ipNum,bBegin,bEnd) || isInnerIp(ipNum,cBegin,cEnd) || ipAddress.equals("127.0.0.1");   //訪問本地localhost獲取為127.0.0.1

        return isInnerIp;               

}  

private static long getIpNum(String ipAddress) {    

     String [] ip = ipAddress.split("\\.");    

     long a = Integer.parseInt(ip[0]);    

     long b = Integer.parseInt(ip[1]);    

     long c = Integer.parseInt(ip[2]);    

     long d = Integer.parseInt(ip[3]);    

     long ipNum = a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d;    

     return ipNum;    

}  

private static boolean isInnerIp(long userIp,long begin,long end){    

      return (userIp>=begin) && (userIp<=end);    

}

public static String getIp()

{

InetAddress ia = null;

try {

ia = InetAddress.getLocalHost();

} catch (UnknownHostException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

//System.out.println();

return ia.getHostAddress();

}

public static String subnet()

{

String ip=getIp();

int lastIdx=ip.lastIndexOf(".");

return ip.substring(0,lastIdx);

}

}