JAVA使用InetAddress.getLocalHost().getHostAddress()获取到的IP地址为127.0.0.1，解决措施。

桃扇骨 2023-10-04 12:11 1阅读 0赞

使用InetAddress.getLocalHost().getHostAddress()读取hosts文件，在linux中获取ip时将获取127.0.0.1  
**解决措施**：使用NetworkInterface.getNetworkInterfaces()从网卡中获取IP。  
**代码如下**：

/**
         * 根据网卡获取IP地址
         *
         * @return
         */
        private String findHostIP() {
        
            try {
        
                Enumeration<NetworkInterface> networks = NetworkInterface.getNetworkInterfaces();
                Enumeration<InetAddress> addresses;
                while (networks.hasMoreElements()) {
        
                    addresses = networks.nextElement().getInetAddresses();
                    while (addresses.hasMoreElements()) {
        
                        InetAddress inetAddress = addresses.nextElement();
                        // 由于线上一台机器可能在多个网段，此处只取以10开头的网段。
                        if (inetAddress instanceof Inet4Address
                                && inetAddress.isSiteLocalAddress()
                                && StringUtils.startsWith(inetAddress.getHostAddress(), "10.")) {
        
                            return inetAddress.getHostAddress();
                        }
                    }
                }
            } catch (Exception e) {
        
                // ignore;
            }
            // 兜底
            String tempIP = "127.0.0.1";
            try {
        
                tempIP = InetAddress.getLocalHost().getHostAddress();
            } catch (UnknownHostException e1) {
        
                // ignore
            }
            return tempIP;
        }