src/main/java/com/alipay/remoting/util/RemotingUtil.java
public static String parseSocketAddressToHostIp(SocketAddress socketAddress) {
        final InetSocketAddress addrs = (InetSocketAddress) socketAddress;
        if (addrs != null) {
            InetAddress addr = addrs.getAddress();
            if (null != addr) {
                return addr.getHostAddress();
            }
        }
        return StringUtils.EMPTY;
    }
public static String parseSocketAddressToHostIp(SocketAddress socketAddress) {
        final InetSocketAddress addrs = (InetSocketAddress) socketAddress;
        if (addrs != null) {
            InetAddress addr = addrs.getAddress();
            if (null != addr) {
                return addr.getHostAddress();
            }
        }
        return StringUtils.EMPTY;
    }
Parse the host ip of socket address.

e.g. /127.0.0.1:1234 -> 127.0.0.1

@param socketAddress
@return String