JAVA获取客户端IP地址

Bertha 。 2024-03-25 22:11 22阅读 0赞

*  ### 场景：需要服务端获取到客户端得ip，然后塞到请求参数中。 ###

*  ### 自己整理了下这两种获取客户端IP得方法。目前自己在使用得是第二种。 ###

1.  ## 第一种方法 ##

public static String getIp2(HttpServletRequest request) {
            String ip = request.getHeader("X-Forwarded-For");
            if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){
                //多次反向代理后会有多个ip值，第一个ip才是真实ip
                int index = ip.indexOf(",");
                if(index != -1){
                    return ip.substring(0,index);
                }else{
                    return ip;
                }
            }
            ip = request.getHeader("X-Real-IP");
            if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){
                return ip;
            }
            return request.getRemoteAddr();
        }

1.  ### 第二种方法 ###

public static String getClinetIP(HttpServletRequest request){
            String ip = null;
            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("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.getHeader("entrust-client-ip");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
                ip = request.getRemoteAddr();
                if ("127.0.0.1".equals(ip) || "0:0:0:0:0:0:0:1".equals(ip.trim())){
                    InetAddress inetAddress = null;
                    try{
                        inetAddress =InetAddress.getLocalHost();
                    }catch (UnknownHostException e){
                        System.out.println("获取IP地址失败");
                    }
                    ip = inetAddress.getHostAddress();
                }
            }
            //多级 方向代理
            if (ip.indexOf(",")>0){
                ip = ip.substring(0,ip.indexOf(",")).trim();
            }
            
            return ip;
        }