content: package org.superboot.utils;
  
  import javax.servlet.http.HttpServletRequest;
  
  /**
   * <b> IP校验 </b>
   * <p>
   * 功能描述:
   * </p>
   */
  public class IPUtils {
  
      public static String getClientAddress(HttpServletRequest request) {
          if (request == null) {
              return "unknown";
          }
          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("X-Forwarded-For");
          }
          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.getHeader("X-Real-IP");
          }
  
          if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
              ip = request.getRemoteAddr();
          }
          return ip;
      }
  
  }
  