monospace;"> 转载自： import?java.io.IOException;?? import?java.net.DatagramPacket;?? import?java.net.DatagramSocket;?? import?java.net.InetAddress;?? ?? public?class?UdpGetClientMacAddr?{?? ????private?String?sRemoteAddr;?? ????private?int?iRemotePort?=?137;?? ????private?byte[]?buffer?=?new?byte[1024];?? ????private?DatagramSocket?ds?=?null;?? ?? ????public?static?void?main(String[]?args)?{?? ????????try?{?? ????????????UdpGetClientMacAddr?mac?=?new?UdpGetClientMacAddr("10.0.150.207");?? ????????????String?ma?=?mac.GetRemoteMacAddr();?? ????????????System.out.println(ma);?? ????????}?catch?(Exception?e)?{?? ????????????e.printStackTrace();?? ????????}?? ????}?? ?? ????public?UdpGetClientMacAddr(String?strAddr)?throws?Exception?{?? ????????sRemoteAddr?=?strAddr;?? ????????ds?=?new?DatagramSocket();?? ????}?? ?? ????protected?final?DatagramPacket?send(final?byte[]?bytes)?throws?IOException?{?? ????????DatagramPacket?dp?=?new?DatagramPacket(bytes,?bytes.length,?InetAddress?? ????????????????.getByName(sRemoteAddr),?iRemotePort);?? ????????ds.send(dp);?? ????????return?dp;?? ????}?? ?? ????protected?final?DatagramPacket?receive()?throws?Exception?{?? ????????DatagramPacket?dp?=?new?DatagramPacket(buffer,?buffer.length);?? ????????ds.receive(dp);?? ????????return?dp;?? ????}?? ?? ????protected?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;?? ????}?? ?? ????protected?final?String?GetMacAddr(byte[]?brevdata)?throws?Exception?{?? ?? ????????int?i?=?brevdata[56]?*?18?+?56;?? ????????String?sAddr?=?"";?? ????????StringBuffer?sb?=?new?StringBuffer(17);?? ?? ????????for?(int?j?=?1;?j?<?7;?j++)?{?? ????????????sAddr?=?Integer.toHexString(0xFF?&?brevdata[i?+?j]);?? ????????????if?(sAddr.length()?<?2)?{?? ????????????????sb.append(0);?? ????????????}?? ????????????sb.append(sAddr.toUpperCase());?? ????????????if?(j?<?6)?? ????????????????sb.append(':');?? ????????}?? ????????return?sb.toString();?? ????}?? ?? ????public?final?void?close()?{?? ????????try?{?? ????????????ds.close();?? ????????}?catch?(Exception?ex)?{?? ????????????ex.printStackTrace();?? ????????}?? ????}?? ?? ????public?final?String?GetRemoteMacAddr()?throws?Exception?{?? ????????byte[]?bqcmd?=?GetQueryCmd();?? ????????send(bqcmd);?? ????????DatagramPacket?dp?=?receive();?? ????????String?smac?=?GetMacAddr(dp.getData());?? ????????close();?? ?? ????????return?smac;?? ????}?? } ?
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