/**
	 * @Title: getIpAddr 
	 * @author kaka  
	 * @Description: 获取客户端IP地址  
	 * @param @return    
	 * @return String   
	 * @throws
	 */
	public static 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(); 
	           if(ip.equals("127.0.0.1")){   
	        	   //根据网卡取本机配置的IP   
	        	   InetAddress inet=null;   
		           try {   
		        	   inet = InetAddress.getLocalHost();   
		           } catch (UnknownHostException e) {   
		        	   e.printStackTrace();   
		           }   
		           ip= 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(ip != null && ip.length() > 15){  
	           if(ip.indexOf(",")>0){   
	               ip = ip.substring(0,ip.indexOf(","));   
	           }   
	       }   
	       return ip; 
	}