Common class for judge IPV6 or IPV4
2024-09-25 02:45:12
import java.util.regex.Pattern; import org.apache.http.annotation.Immutable; /**
* A collection of utilities relating to InetAddresses.
*
* @since 4.0
*/
@Immutable
public class InetAddressUtils { private InetAddressUtils() {
} private static final String IPV4_BASIC_PATTERN_STRING =
"(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}" + // initial 3 fields, 0-255 followed by .
"([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])"; // final field, 0-255 private static final Pattern IPV4_PATTERN =
Pattern.compile("^" + IPV4_BASIC_PATTERN_STRING + "$"); private static final Pattern IPV4_MAPPED_IPV6_PATTERN = // TODO does not allow for redundant leading zeros
Pattern.compile("^::[fF]{4}:" + IPV4_BASIC_PATTERN_STRING + "$"); private static final Pattern IPV6_STD_PATTERN =
Pattern.compile(
"^[0-9a-fA-F]{1,4}(:[0-9a-fA-F]{1,4}){7}$"); private static final Pattern IPV6_HEX_COMPRESSED_PATTERN =
Pattern.compile(
"^(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)" + // 0-6 hex fields
"::" +
"(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)$"); // 0-6 hex fields /*
* The above pattern is not totally rigorous as it allows for more than 7 hex fields in total
*/
private static final char COLON_CHAR = ':'; // Must not have more than 7 colons (i.e. 8 fields)
private static final int MAX_COLON_COUNT = 7; /**
* Checks whether the parameter is a valid IPv4 address
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid IPv4 address
*/
public static boolean isIPv4Address(final String input) {
return IPV4_PATTERN.matcher(input).matches();
} public static boolean isIPv4MappedIPv64Address(final String input) {
return IPV4_MAPPED_IPV6_PATTERN.matcher(input).matches();
} /**
* Checks whether the parameter is a valid standard (non-compressed) IPv6 address
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid standard (non-compressed) IPv6 address
*/
public static boolean isIPv6StdAddress(final String input) {
return IPV6_STD_PATTERN.matcher(input).matches();
} /**
* Checks whether the parameter is a valid compressed IPv6 address
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid compressed IPv6 address
*/
public static boolean isIPv6HexCompressedAddress(final String input) {
int colonCount = 0;
for(int i = 0; i < input.length(); i++) {
if (input.charAt(i) == COLON_CHAR) {
colonCount++;
}
}
return colonCount <= MAX_COLON_COUNT && IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
} /**
* Checks whether the parameter is a valid IPv6 address (including compressed).
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid standard or compressed IPv6 address
*/
public static boolean isIPv6Address(final String input) {
return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
} }
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
最新文章
- 懒加载插件- jquery.lazyload.js
- DELL灵越15R5521安装黑苹果
- java 基本数据类型
- Memcached 分布式缓存实现原理
- iOS 学习资料整理
- shell脚本中获取本机ip地址的方法
- 利用Scanner键盘输入
- Solr多核的配置
- ionic2 干货
- android 中Log - 简单使用
- centos 6.5 服务器安装 （LNMP ntfs文件支持 PHP-RPM CHROOT沙盒）
- hdu 4419 Colourful Rectangle
- convert用法（数据库中原本储存的格式是Nvarchar，如何修改成datetime格式）
- SpringMVC获取页面数据乱码的解决get/post
- Python之面向对象四
- Flash与EEPROM
- 目标检测(一) R-CNN
- zabbix疑难之时区问题
- BZOJ1299[LLH邀请赛]巧克力棒——Nim游戏+搜索
- 【Tomcat】Servlet 工作原理解析