主要是 使用ping，然后ip范围是192.168.0.1-----192.168.0.255
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class LanPing {
private int corePoolSize;//线程池的线程个数
private int maximumPoolSize;
private ThreadPoolExecutor threadPool;
private List devices; //用于保存每次ping线程执行通过的的结果ip+hostName;
public LanPing() {
corePoolSize=5;
maximumPoolSize=100;
threadPool=new ThreadPoolExecutor(corePoolSize, maximumPoolSize, 3,
TimeUnit.SECONDS, new ArrayBlockingQueue(10),
new ThreadPoolExecutor.CallerRunsPolicy());
devices=new ArrayList();
}
public List search() throws UnknownHostException, InterruptedException{
InetAddress host = InetAddress.getLocalHost();
String hostName=host.getHostName();
String hostAddress = host.getHostAddress();
System.out.println(hostName+":"+hostAddress);
int k=0;
k=hostAddress.lastIndexOf(".");
String ss = hostAddress.substring(0,k+1);
for(int i=1;i <255;i++){ //对所有局域网Ip
String iip=ss+i;
threadPool.execute(new PingIP(iip));
Thread.sleep(100);
}
return devices;
}
class PingIP implements Runnable{
private String ip;
public PingIP(String ip) {
this.ip=ip;
}
synchronized public void run(){
try{
String ping="ping -n 1 -w 5 "+ip;
System.out.println(ping);
Process process=Runtime.getRuntime().exec(ping);
InputStreamReader inputStream = new InputStreamReader(process.getInputStream(),"GBK");
BufferedReader reader=new BufferedReader(inputStream);
StringBuffer buf=new StringBuffer();
String s;
while((s=reader.readLine())!=null){
buf.append(s+"\n");
}
if(buf.toString().indexOf("请求超时")!=-1){
}else{
InetAddress host = InetAddress.getByName(ip);
String hostName=host.getHostName();
DeviceInfo deviceInfo=new DeviceInfo(hostName, ip);
devices.add(deviceInfo);
System.out.println(hostName+":"+ip);
}
//System.out.println(buf.toString());
}catch(IOException e){
e.printStackTrace();
}
}
}
class DeviceInfo{
private String name;
private String ip;
public DeviceInfo(String name,String ip) {
this.name=name;
this.ip=ip;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getIp() {
return ip;
}
public void setIp(String ip) {
this.ip = ip;
}
}
}
public class Test {
/**
* @param args
*/
public static void main(String[] args) {
LanPing lanPing=new LanPing();
try {
List infos=lanPing.search();
for(LanPing.DeviceInfo info:infos){
System.out.println(info.getName()+":"+info.getIp());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}