package util;

import java.net.InetAddress;

import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

public class CusAccessObjectUtil {

/**

* 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,

* 参考文章： http://developer.51cto.com/art/201111/305181.htm

*

* 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？

* 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。

*

* 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,

* 192.168.1.100

*

* 用户真实IP为： 192.168.1.110

*

* @param request

* @return

*/

public static String getIpAddress(HttpServletRequest request) {

String ipAddress = request.getHeader("x-forwarded-for");

if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {

ipAddress = request.getHeader("Proxy-Client-IP");

}

if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {

ipAddress = request.getHeader("WL-Proxy-Client-IP");

}

if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {

ipAddress = request.getRemoteAddr();

if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){

//根据网卡取本机配置的IP

InetAddress inet=null;

try {

inet = InetAddress.getLocalHost();

} catch (UnknownHostException e) {

e.printStackTrace();

}

ipAddress= inet.getHostAddress();

}

}

//对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割

if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15

if(ipAddress.indexOf(",")>0){

ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));

}

}

return ipAddress;

}

public static String getLocalIP() throws UnknownHostException {

String localIP = "";

InetAddress addr = (InetAddress) InetAddress.getLocalHost();

localIP = addr.getHostAddress().toString();

return localIP;

}

}