j通过本地dns解析获得域名的iP 悟寰轩

InetAddress[] arr = InetAddress.getAllByName("www.qq.com");
for(InetAddress addr :arr) {
    if(addr instanceof Inet4Address) {
        System.out.println("ipv4 : "+addr.getHostAddress());
    } else if(addr instanceof Inet6Address){
        System.out.println("ipv6 : "+addr.getHostAddress());
    }
}