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JAVA获取本地,远程macAddress

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来源:http://www.2cto.com/kf/201108/101403.html

获取本地macAddress
 Java代码 
import java.io.InputStreamReader; 
 import java.io.LineNumberReader; 
  
  
 public class LocalMacAddr 
 { 
     public String getMACAddr() 
     { 
         String mac = ""; 
         try 
         { 
             Process process = Runtime.getRuntime().exec("ipconfig /all"); 
             InputStreamReader ir = new InputStreamReader(process.getInputStream()); 
             LineNumberReader input = new LineNumberReader(ir); 
             String line = null; 
             while ((line = input.readLine()) != null) 
             { 
                 if (line.indexOf("Physical Address") > 0) 
                 { 
                     mac = line.substring(line.indexOf("-") - 2); 
                 } 
             } 
         } 
         catch (Exception e) 
         { 
             e.printStackTrace(); 
         } 
         return mac; 
     } 
      
     public static void main(String[] args) 
     { 
         LocalMacAddr ma = new LocalMacAddr(); 
         System.out.println(ma.getMACAddr()); 
     } 
  
 } 
  
获取远程macAddress
 Java代码 
import java.io.IOException; 
 import java.net.DatagramPacket; 
 import java.net.DatagramSocket; 
 import java.net.InetAddress; 
  
 public class RemoteMacAddr 
 { 
     private String sRemoteAddr; 
     private int iRemotePort = 137; 
     private byte[] buffer = new byte[1024]; 
     private DatagramSocket ds = null; 
  
     public RemoteMacAddr(String strAddr) throws Exception 
     { 
         this.sRemoteAddr = strAddr; 
         this.ds = new DatagramSocket(); 
     } 
  
     private DatagramPacket send(byte[] b) throws IOException 
     { 
         DatagramPacket dp = new DatagramPacket(b, b.length, InetAddress.getByName(sRemoteAddr), iRemotePort); 
         ds.send(dp); 
         return dp; 
     } 
  
     private DatagramPacket receive() throws Exception 
     { 
         DatagramPacket dp = new DatagramPacket(buffer, buffer.length); 
         ds.receive(dp); 
         return dp; 
     } 
  
     // 询问包结构: 
     // Transaction ID 两字节(16位) 0x00 0x00 
     // Flags 两字节(16位) 0x00 0x10 
     // Questions 两字节(16位) 0x00 0x01 
     // AnswerRRs 两字节(16位) 0x00 0x00 
     // AuthorityRRs 两字节(16位) 0x00 0x00 
     // AdditionalRRs 两字节(16位) 0x00 0x00 
     // Name:array [1..34] 0x20 0x43 0x4B 0x41(30个) 0x00 ; 
     // Type:NBSTAT 两字节 0x00 0x21 
     // Class:INET 两字节(16位)0x00 0x01 
     private byte[] GetQueryCmd() throws Exception 
     { 
         byte[] t_ns = new byte[50]; 
         t_ns[0] = 0x00; 
         t_ns[1] = 0x00; 
         t_ns[2] = 0x00; 
         t_ns[3] = 0x10; 
         t_ns[4] = 0x00; 
         t_ns[5] = 0x01; 
         t_ns[6] = 0x00; 
         t_ns[7] = 0x00; 
         t_ns[8] = 0x00; 
         t_ns[9] = 0x00; 
         t_ns[10] = 0x00; 
         t_ns[11] = 0x00; 
         t_ns[12] = 0x20; 
         t_ns[13] = 0x43; 
         t_ns[14] = 0x4B; 
         for (int i = 15; i < 45; i++) 
         { 
             t_ns[i] = 0x41; 
         } 
         t_ns[45] = 0x00; 
         t_ns[46] = 0x00; 
         t_ns[47] = 0x21; 
         t_ns[48] = 0x00; 
         t_ns[49] = 0x01; 
         return t_ns; 
     } 
  
     // 表1 “UDP-NetBIOS-NS”应答包的结构及主要字段一览表 
     // 序号 字段名 长度 
     // 1 Transaction ID 两字节(16位) 
     // 2 Flags 两字节(16位) 
     // 3 Questions 两字节(16位) 
     // 4 AnswerRRs 两字节(16位) 
     // 5 AuthorityRRs 两字节(16位) 
     // 6 AdditionalRRs 两字节(16位) 
     // 7 Name<Workstation/Redirector> 34字节(272位) 
     // 8 Type:NBSTAT 两字节(16位) 
     // 9 Class:INET 两字节(16位) 
     // 10 Time To Live 四字节(32位) 
     // 11 Length 两字节(16位) 
     // 12 Number of name 一个字节(8位) 
     // NetBIOS Name Info 18×Number Of Name字节 
     // Unit ID 6字节(48位 
     private String GetMacAddr(byte[] b) throws Exception 
     { 
         // 获取计算机名 
         //System.out.println(new String(b, 57, 18)); 
         //System.out.println(new String(b, 75, 18)); 
         //System.out.println(new String(b, 93, 18)); 
         int i = b[56] * 18 + 56; 
         String sAddr = ""; 
         StringBuffer sb = new StringBuffer(17); 
         // 先从第56字节位置,读出Number Of Names(NetBIOS名字的个数,其中每个NetBIOS Names 
         // Info部分占18个字节) 
         // 然后可计算出“Unit ID”字段的位置=56+Number Of 
         // Names×18,最后从该位置起连续读取6个字节,就是目的主机的MAC地址。 
         for (int j = 1; j < 7; j++) 
         { 
             sAddr = Integer.toHexString(0xFF & b[i + j]); 
             if (sAddr.length() < 2) 
             { 
                 sb.append(0); 
             } 
             sb.append(sAddr.toUpperCase()); 
             if (j < 6) 
                 sb.append('-'); 
         } 
         return sb.toString(); 
     } 
  
     private void close() 
     { 
         try 
         { 
             ds.close(); 
         } 
         catch (Exception ex) 
         { 
             ex.printStackTrace(); 
         } 
     } 
  
     public String GetRemoteMacAddr() throws Exception 
     { 
         byte[] bqcmd = GetQueryCmd(); 
         this.send(bqcmd); 
         DatagramPacket dp = this.receive(); 
         String smac = GetMacAddr(dp.getData()); 
         this.close(); 
         return smac; 
     } 
  
     public static void main(String[] args) throws Exception 
     { 
         RemoteMacAddr addr = new RemoteMacAddr("192.168.1.119"); 
         System.out.println(addr.GetRemoteMacAddr()); 
     } 
 } 








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