package cn.outofmemory.snippets.core; import java.util.regex.Pattern; /** * A collection of utilities relating to InetAddresses. */ public class InetAddressUtils { public static void main(String[] args){ String addr="192.168.1.2"; System.out.println(isIPv4Address(addr)); } private InetAddressUtils() { } private static final Pattern IPV4_PATTERN = Pattern.compile( "^(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}$"); private static final Pattern IPV6_STD_PATTERN = Pattern.compile( "^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$"); private static final Pattern IPV6_HEX_COMPRESSED_PATTERN = Pattern.compile( "^((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)$"); public static boolean isIPv4Address(final String input) { return IPV4_PATTERN.matcher(input).matches(); } public static boolean isIPv6StdAddress(final String input) { return IPV6_STD_PATTERN.matcher(input).matches(); } public static boolean isIPv6HexCompressedAddress(final String input) { return IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches(); } public static boolean isIPv6Address(final String input) { return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input); } }
本文轉自：http://outofmemory.cn/code-snippet/1197/java-usage-regular-expression-yanzheng-IP-v4-IP-v6-address