1 import javax.servlet.http.HttpServletRequest;   2    3 /**  4  * 自定义访问对象工具类  5  *   6  * 获取对象的IP地址等信息  7  * @author X-rapido  8  *  9  */  10 public class CusAccessObjectUtil {  11   12     /** 13      * 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, 14 *  16      * 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？ 17      * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。 18      *  19      * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130, 20      * 192.168.1.100 21      *  22      * 用户真实IP为： 192.168.1.110 23      *  24      * @param request 25      * @return 26      */  27     public static String getIpAddress(HttpServletRequest request) {  28         String ip = request.getHeader("x-forwarded-for");  29         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  30             ip = request.getHeader("Proxy-Client-IP");  31         }  32         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  33             ip = request.getHeader("WL-Proxy-Client-IP");  34         }  35         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  36             ip = request.getHeader("HTTP_CLIENT_IP");  37         }  38         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  39             ip = request.getHeader("HTTP_X_FORWARDED_FOR");  40         }  41         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  42             ip = request.getRemoteAddr();  43         }  44         return ip;  45     }  46       47 }