Java获取客户端IP地址

﹏ヽ暗。殇╰゛Y 2023-09-23 22:02 8阅读 0赞

/**
     *  获取客户端登录的 IP 地址
     **/
    public class IPUtil {
        
      public static String getIPAddress(HttpServletRequest request) {
        
        String ip = null;
        // X-Forwarded-For：Squid 服务代理
        String ipAddresses = request.getHeader("X-Forwarded-For");
        if (ipAddresses == null || ipAddresses.length() == 0
                || "unknown".equalsIgnoreCase(ipAddresses)) {
        
          //Proxy-Client-IP：apache 服务代理
          ipAddresses = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddresses == null || ipAddresses.length() == 0
                || "unknown".equalsIgnoreCase(ipAddresses)) {
        
          // WL-Proxy-Client-IP：weblogic 服务代理
          ipAddresses = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddresses == null || ipAddresses.length() == 0
                || "unknown".equalsIgnoreCase(ipAddresses)) {
        
          // HTTP_CLIENT_IP：有些代理服务器
          ipAddresses = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ipAddresses == null || ipAddresses.length() == 0
                || "unknown".equalsIgnoreCase(ipAddresses)) {
        
          // X-Real-IP：nginx服务代理
          ipAddresses = request.getHeader("X-Real-IP");
        }
        
        // 有些网络通过多层代理，那么获取到的ip就会有多个，一般都是通过逗号（,）分割开来，
        // 并且第一个ip为客户端的真实IP
        if (ipAddresses != null && ipAddresses.length() != 0) {
        
          ip = ipAddresses.split(",")[0];
        }
        
        // 还是不能获取到，最后再通过request.getRemoteAddr();获取
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
        
          ip = request.getRemoteAddr();
        }
        
        return ip.equals("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ip;
      }
    }