gfsyy0 2010-11-04
需要对用户的 ip 和 mac 地址进行验证,这里用到获取客户端ip和mac地址的两个方法,留存。
1.获取客户端ip地址(这个必须从客户端传到后台):
jsp页面下,很简单,request.getRemoteAddr();
因为系统的VIew层是用JSF来实现的,因此页面上没法直接获得类似request,在bean里做了个强制转换
public String getMyIP() { try { FacesContext fc = FacesContext.getCurrentInstance(); HttpServletRequest request = (HttpServletRequest)fc.getExternalContext().getRequest(); return request.getRemoteAddr(); } catch (Exception e) { e.printStackTrace(); } return ""; }
2.获取客户端mac地址
调用window的命令,在后台Bean里实现 通过ip来获取mac地址。方法如下:public String getMACAddress(String ip){ String str = ""; String macAddress = ""; try { Process p = Runtime.getRuntime().exec("nbtstat -A " + ip); InputStreamReader ir = new InputStreamReader(p.getInputStream()); LineNumberReader input = new LineNumberReader(ir); for (int i = 1; i < 100; i++) { str = input.readLine(); if (str != null) { if (str.indexOf("MAC Address") > 1) { macAddress = str.substring(str.indexOf("MAC Address") + 14, str.length()); break; } } } } catch (IOException e) { e.printStackTrace(System.out); } return macAddress; }
完整代码:
import java.io.IOException; import java.io.InputStreamReader; import java.io.LineNumberReader; public class GetMACAddress { public String getMACAddress(String ipAddress) { String str = "", strMAC = "", macAddress = ""; try { Process pp = Runtime.getRuntime().exec("nbtstat -a " + ipAddress); InputStreamReader ir = new InputStreamReader(pp.getInputStream()); LineNumberReader input = new LineNumberReader(ir); for (int i = 1; i < 100; i++) { str = input.readLine(); if (str != null) { if (str.indexOf("MAC Address") > 1) { strMAC = str.substring(str.indexOf("MAC Address") + 14, str.length()); break; } } } } catch (IOException ex) { return "Can't Get MAC Address!"; } // if (strMAC.length() < 17) { return "Error!"; } macAddress = strMAC.substring(0, 2) + ":" + strMAC.substring(3, 5) + ":" + strMAC.substring(6, 8) + ":" + strMAC.substring(9, 11) + ":" + strMAC.substring(12, 14) + ":" + strMAC.substring(15, 17); // return macAddress; } public static void main(String[] args) { GetMACAddress getMACAddress = new GetMACAddress(); System.out.println(getMACAddress.getMACAddress("59.78.63.38")); //获得该ip地址的mac地址 } public static String procAll(String str) { return procStringEnd(procFirstMac(procAddress(str))); } public static String procAddress(String str) { int indexof = str.indexOf("Physical Address"); if (indexof > 0) { return str.substring(indexof, str.length()); } return str; } public static String procFirstMac(String str) { int indexof = str.indexOf(":"); if (indexof > 0) { return str.substring(indexof + 1, str.length()).trim(); } return str; } public static String procStringEnd(String str) { int indexof = str.indexOf("\r"); if (indexof > 0) { return str.substring(0, indexof).trim(); } return str; } }
只要写一个servlet来调用这个类的getMACAddress(Stringnetip)方法就可以获得客户端的mac地址了,相信你会写jsp应该对servlet也不陌生吧,在jsp中调用servlet通过session传递返回的mac地址,加以判断就可以了
mac地址是可以通过注册表修改的,不建议以此来作为限制依据~补充:
关于获取IP地址的方式,最近在linux下有一个教训,如果单纯通过InetAddress来获取IP地址,就会出现在不同的机器上IP地址不同的问题。
InetAddress.getLocalHost().getAddress()实际上是根据hostname来获取IP地址的。linux系统在刚刚装完默认的hostname是localhost,所以通过上面代码获取到的本机ip就是127.0.0.1,相对应,比如我的hostname就是rjlin.atsig.com返回的ip地址确是atsig.com的地址。暂时采用下面代码来处理,当然还不够灵活:
publicstaticbyte[]getIp()throwsUnknownHostException{
byte[]b=InetAddress.getLocalHost().getAddress();
EnumerationallNetInterfaces=null;
try{
allNetInterfaces=NetworkInterface.getNetworkInterfaces();
}catch(SocketExceptione){
e.printStackTrace();
}
InetAddressip=null;
NetworkInterfacenetInterface=null;
while(allNetInterfaces.hasMoreElements()){
netInterface=(NetworkInterface)allNetInterfaces.nextElement();
if(netInterface.getName().trim().equals("eth0")){
Enumerationaddresses=netInterface.getInetAddresses();
while(addresses.hasMoreElements()){
ip=(InetAddress)addresses.nextElement();
}
break;
}
}
if(ip!=null&&ipinstanceofInet4Address){
returnb=ip.getAddress();
}
returnb;
}补充:
// 获取真实IP的方法().
public String getIpAddr(HttpServletRequest request) {
Stringip=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();
}
returnip;
}