ip工具类

public class IpUtil {
	/** 
     * @Description: 获取客户端IP地址   
     */  
    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 (Exception e) {     
                       e.printStackTrace();     
                   }     
                   ip= inet.getHostAddress();     
               }  
               if(ip.equals("localhost")){     
                   //根据网卡取本机配置的IP     
                   InetAddress inet=null;     
                   try {     
                       inet = InetAddress.getLocalHost();     
                   } catch (Exception e) {     
                       e.printStackTrace();     
                   }     
                   ip= inet.getHostAddress();     
               }  
           }   
           // 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;   
    }  

}