java或jsp获取客户端mac、计算机名、ip等信息
想获取客户端的mac、计算机名、ip等信息,除了在jsp页面里面使用activex的办法外,还有没有其它办法了? 不要经过客户端用户的同意,就想把那些信息保存到数据库里
[解决办法]
import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;/** * 主机A向主机B发送“UDP-NetBIOS-NS”询问包,即向主机B的137端口,发Query包来询问主机B的NetBIOS Names信息。 * 其次,主机B接收到“UDP-NetBIOS-NS”询问包,假设主机B正确安装了NetBIOS服务........... 而且137端口开放,则主机B会向主机A发送一个“UDP-NetBIOS-NS”应答包,即发Answer包给主机A。 * 并利用UDP(NetBIOS Name Service)来快速获取远程主机MAC地址的方法 * * @author WINDY */public class UdpGetClientMacAddr { private String sRemoteAddr; private int iRemotePort = 137; private byte[] buffer = new byte[1024]; private DatagramSocket ds = null; 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; } // 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 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; } // 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 protected final String GetMacAddr(byte[] brevdata) throws Exception { // 获取计算机名 System.out.println(new String(brevdata, 57, 18)); System.out.println(new String(brevdata, 75, 18)); System.out.println(new String(brevdata, 93, 18)); int i = brevdata[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 & 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; } public static void main(String[] args) throws Exception { UdpGetClientMacAddr addr = new UdpGetClientMacAddr("192.168.0.150"); System.out.println(addr.GetRemoteMacAddr()); }} // 获取真实IP的方法()public String getIpAddr(HttpServletRequest request) { String ip = request.getHeader("x-forwarded-for"); if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); } if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); } if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); } return ip; }