java获取IP为0:0:0:0:0:0:0:1的情况

「爱情、让人受尽委屈。」 2022-12-29 12:47 301阅读 0赞

0:0:0:0:0:0:0:1是ipv6的表现形式，对应ipv4来说相当于127.0.0.1，也就是本机

访问时是通过 localhost 来访问，用java获取ip地址可能会出现该问题，这时获取的ip将是 0:0:0:0:0:0:0:1

要是机器在局域网中，访问时使用自己的ip访问，如 我的ip是 ：192.168.2.177  
访问url：http://192.168.2.177:8080

这时候请求会经过路由器转发，所以服务器获取的就是本机的局域网内ip，在java中获取的ip就是 192.168.2.177了

获取ip的方法工具类

package pers.adlered.voter.limit;
    
    import javax.servlet.http.HttpServletRequest;
    import java.net.InetAddress;
    import java.net.UnknownHostException;
    
    public class IpUtil { 
        public static String getIpAddr(HttpServletRequest request) { 
            String ipAddress = null;
            try { 
                ipAddress = request.getHeader("x-forwarded-for");
                if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { 
                    ipAddress = request.getHeader("Proxy-Client-IP");
                }
                if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { 
                    ipAddress = request.getHeader("WL-Proxy-Client-IP");
                }
                if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { 
                    ipAddress = request.getRemoteAddr();
                    if (ipAddress.equals("127.0.0.1")) { 
                        InetAddress inet = null;
                        try { 
                            inet = InetAddress.getLocalHost();
                        } catch (UnknownHostException e) { 
                            e.printStackTrace();
                        }
                        ipAddress = inet.getHostAddress();
                    }
                }
                if (ipAddress != null && ipAddress.length() > 15) { 
                    if (ipAddress.indexOf(",") > 0) { 
                        ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                    }
                }
            } catch (Exception e) { 
                ipAddress = "";
            }
            return ipAddress;
        }
    }

HttpServletRequest request;
    //ipAddr就是获取的ip
    String ipAddr = IpUtil.getIpAddr(request);