页面获取IP地址

获取IP的方法
/**
* 获取IP地址
* @param request
* @return
*/
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;  
}