扫描500个IP10秒钟左右, 一个IP等待0.3秒 说来惭愧, 我觉得是用java写的过程编程, 少贴一点仅供参考: package steeven; import java.sql.*; import java.io.*; import java.util.*; import java.text.*; import javax.servlet.http.*; public class Ip extends Common implements Runnable{ public String ip; // IP, 用户名, 主机名 ResultSet list; // 分页显示的记录集 public Ip cur; // 分页显示的当前记录 static public Hashtable ping = new Hashtable(); //ping 后的结果集 static int threadCount = 0; //当前线程的数量, 防止过多线程摧毁电脑 public Ip() {} public Ip(String ip){ this.ip=ip; Thread r = new Thread(this); r.start(); } public static void Ping(String ip) throws Exception{ //最多30个线程 while(threadCount>30) Thread.sleep(50); threadCount +=1; Ip p = new Ip(ip); } public void PingAll() throws Exception{ threadCount =0; ping = new Hashtable(); while(next()) //next()对所有局域网Ip放到cur Ping(cur.ip); //等着所有Ping结束 while(threadCount>0) Thread.sleep(50); } public void run(){ try{ Process p= Runtime.getRuntime().exec ("ping "+ip+ " -w 300 -n 1"); InputStreamReader ir = new InputStreamReader(p.getInputStream()); LineNumberReader input = new LineNumberReader (ir); //读取结果行 for (int i=1 ; i<7; i++) input.readLine(); String line= input.readLine(); if (line.length()<17 || line.substring(8,17).equals("timed out")) ping.put(ip,new Boolean(false)); else ping.put(ip,new Boolean(true)); //线程结束 threadCount -= 1; }catch (IOException e){} } public static void main(String[] args) throws Exception{ Ip ip= new Ip(); ip.PingAll(); java.util.Enumeration key = ping.keys(); String k; while((k = (String)key.nextElement()) != null) System.out.println(k+": "+ping.get(k)); } } 1. 利用Ping比较愚蠢, 但是相对简单些 2. 如果Ping 成功后, 用nbtstat还可以得到主机名, 当前用户名, MAC地址...一切尽在掌握中 :) |