Java，如何获取局域网内所有的ip呢？
如何扫描局域网内的所有ip呢？
代码如下：
Java代码
- package com.jn.lan;
- import java.io.BufferedReader;
- import java.io.InputStreamReader;
- import java.net.InetAddress;
- import java.util.StringTokenizer;
- import java.util.Vector;
- import com.common.util.SystemHWUtil;
- import com.string.widget.util.ValueWidget;
- public class LANIP {
- public static InetAddress[] getAllOnline() {
- // TODO Auto-generated method stub
- Vector v = new Vector(50);
- try {
- // Process process1 =
- // Runtime.getRuntime().exec("ping -w 2 -n 1 192.168.1.%i");
- // process1.destroy();
- Process process = Runtime.getRuntime().exec("arp -a");
- InputStreamReader inputStr = new InputStreamReader(
- process.getInputStream(), "GBK");
- BufferedReader br = new BufferedReader(inputStr);
- String temp = "";
- br.readLine();
- br.readLine();
- br.readLine();// 此后开始读取IP地址，之前为描述信息，忽略。
- while ((temp = br.readLine()) != null) {
- System.out.println(temp);
- if (!ValueWidget.isNullOrEmpty(temp)) {
- StringTokenizer tokens = new StringTokenizer(temp);
- String x;
- InetAddress add=null;
- try {
- add = InetAddress.getByName(x = tokens
- .nextToken());
- } catch (java.net.UnknownHostException e) {
- continue;
- }
- // System.out.println(x);
- v.add(add);
- // System.out.println(add);
- }
- }
- System.out.println(SystemHWUtil.DIVIDING_LINE);
- v.add(InetAddress.getLocalHost());
- process.destroy();
- br.close();
- inputStr.close();
- } catch (Exception e) {
- System.out.println("可能是网络不可用。");
- e.printStackTrace();
- }
- int cap = v.size();
- InetAddress[] addrs = new InetAddress[cap];
- for (int i = 0; i < cap; i++) {
- addrs[i] = (InetAddress) v.elementAt(i);
- System.out.println(addrs[i]);
- }
- return addrs;
- }
- public static void main(String args[]) {
- InetAddress[] i = new LANIP().getAllOnline();
- }
- }
运行结果：
Java代码
- 169.254.255.255 ff-ff-ff-ff-ff-ff 静态
- 224.0.0.2 01-00-5e-00-00-02 静态
- 224.0.0.22 01-00-5e-00-00-16 静态
- 224.0.0.252 01-00-5e-00-00-fc 静态
- 226.81.9.8 01-00-5e-51-09-08 静态
- 239.255.255.250 01-00-5e-7f-ff-fa 静态
- 255.255.255.255 ff-ff-ff-ff-ff-ff 静态
- 接口: 169.254.190.162 --- 0xd
- Internet 地址 物理地址 类型
- 169.254.255.255 ff-ff-ff-ff-ff-ff 静态
- 224.0.0.2 01-00-5e-00-00-02 静态
- 224.0.0.22 01-00-5e-00-00-16 静态
- 224.0.0.252 01-00-5e-00-00-fc 静态
- 226.81.9.8 01-00-5e-51-09-08 静态
- 239.255.255.250 01-00-5e-7f-ff-fa 静态
- 255.255.255.255 ff-ff-ff-ff-ff-ff 静态
- 接口: 192.168.1.105 --- 0x14
- Internet 地址 物理地址 类型
- 192.168.1.1 00-21-5d-3c-79-16 动态
- 192.168.1.106 b8-76-3f-a6-a8-e9 动态
- 192.168.1.109 60-d8-19-14-6c-55 动态
- 192.168.1.110 00-21-5d-3c-79-16 动态
- 192.168.1.255 ff-ff-ff-ff-ff-ff 静态
- 224.0.0.2 01-00-5e-00-00-02 静态
- 224.0.0.22 01-00-5e-00-00-16 静态
- 224.0.0.252 01-00-5e-00-00-fc 静态
- 239.255.255.250 01-00-5e-7f-ff-fa 静态
- 255.255.255.255 ff-ff-ff-ff-ff-ff 静态
- 接口: 192.168.137.1 --- 0x15
- Internet 地址 物理地址 类型
- 192.168.137.182 84-7a-88-cf-87-35 动态
- 192.168.137.255 ff-ff-ff-ff-ff-ff 静态
- 224.0.0.2 01-00-5e-00-00-02 静态
- 224.0.0.22 01-00-5e-00-00-16 静态
- 224.0.0.252 01-00-5e-00-00-fc 静态
- 239.255.255.250 01-00-5e-7f-ff-fa 静态
- 255.255.255.255 ff-ff-ff-ff-ff-ff 静态
- ---------------------------------------
- /169.254.255.255
- /224.0.0.2
- /224.0.0.22
- /224.0.0.252
- /226.81.9.8
- /239.255.255.250
- /255.255.255.255
- /169.254.255.255
- /224.0.0.2
- /224.0.0.22
- /224.0.0.252
- /226.81.9.8
- /239.255.255.250
- /255.255.255.255
- /192.168.1.1
- /192.168.1.106
- /192.168.1.109
- /192.168.1.110
- /192.168.1.255
- /224.0.0.2
- /224.0.0.22
- /224.0.0.252
- /239.255.255.250
- /255.255.255.255
- /192.168.137.182
- /192.168.137.255
- /224.0.0.2
- /224.0.0.22
- /224.0.0.252
- /239.255.255.250
- /255.255.255.255
- wh-THINK/169.254.86.27
