java使用正则表达式验证IP V4、 IP V6

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); 
    }

}

 本文转自：http://outofmemory.cn/code-snippet/1197/java-usage-regular-expression-yanzheng-IP-v4-IP-v6-address