2.根據IP類型，壹次遍歷局域網內IP地址
JAVA類，編譯之後直接運行便可以得到局域網內所有IP,具體怎樣使用妳自己編寫相應代碼調用便可
代碼如下：：
package bean;
import java.io.*;
import java.util.*;
public class Ip{
static public HashMap ping; //ping 後的結果集
public HashMap getPing(){ //用來得到ping後的結果集
return ping;
}
//當前線程的數量, 防止過多線程摧毀電腦
static int threadCount = 0;
public Ip() {
ping = new HashMap();
}
public void Ping(String ip) throws Exception{
//最多30個線程
while(threadCount>30)
Thread.sleep(50);
threadCount +=1;
PingIp p = new PingIp(ip);
p.start();
}
public void PingAll() throws Exception{
//首先得到本機的IP，得到網段
InetAddress host = InetAddress.getLocalHost();
String hostAddress = host.getHostAddress();
int k=0;
k=hostAddress.lastIndexOf(".");
String ss = hostAddress.substring(0,k+1);
for(int i=1;i <=255;i++){ //對所有局域網Ip
String iip=ss+i;
Ping(iip);
}
//等著所有Ping結束
while(threadCount>0)
Thread.sleep(50);
}
public static void main(String[] args) throws Exception{
Ip ip= new Ip();
ip.PingAll();
java.util.Set entries = ping.entrySet();
Iterator iter=entries.iterator();
String k;
while(iter.hasNext()){
Map.Entry entry=(Map.Entry)iter.next();
String key=(String)entry.getKey();
String value=(String)entry.getValue();
if(value.equals("true"))
System.out.println(key+"-->"+value);
}
}
class PingIp extends Thread{
public String ip; // IP
public PingIp(String ip){
this.ip=ip;
}
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);
//讀取結果行
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,"false");
else
ping.put(ip,"true");
//線程結束
threadCount -= 1;
}catch (IOException e){}
}
}
}