com.vip.vjtools.vjkit.net

Class IPUtil

java.lang.Object

com.vip.vjtools.vjkit.net.IPUtil

public class IPUtil
extends Object

InetAddress工具类，基于Guava的InetAddresses. 主要包含int, String/IPV4String, InetAdress/Inet4Address之间的互相转换 先将字符串传换为byte[]再用InetAddress.getByAddress(byte[])，避免了InetAddress.getByName(ip)可能引起的DNS访问. InetAddress与String的转换其实消耗不小，如果是有限的地址，建议进行缓存.

Constructor Summary

Constructors

Constructor and Description
IPUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static Inet4Address	fromInt(int address) 从int转换为Inet4Address(仅支持IPV4)
static InetAddress	fromIpString(String address) 从String转换为InetAddress.
static Inet4Address	fromIpv4String(String address) 从IPv4String转换为InetAddress.
static String	intToIpv4String(int i) int转换到IPV4 String, from Netty NetUtil
static int	ipv4StringToInt(String ipv4Str) Ipv4 String 转换到int
static int	toInt(InetAddress address) 从InetAddress转化到int, 传输和存储时, 用int代表InetAddress是最小的开销.
static String	toIpString(InetAddress address) InetAddress转换为String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IPUtil

public IPUtil()

Method Detail

toInt

public static int toInt(InetAddress address)

从InetAddress转化到int, 传输和存储时, 用int代表InetAddress是最小的开销. InetAddress可以是IPV4或IPV6，都会转成IPV4.

See Also:

InetAddresses.coerceToInteger(InetAddress)

toIpString

public static String toIpString(InetAddress address)

InetAddress转换为String. InetAddress可以是IPV4或IPV6. 其中IPV4直接调用getHostAddress()

See Also:

InetAddresses.toAddrString(InetAddress)

fromInt

public static Inet4Address fromInt(int address)

从int转换为Inet4Address(仅支持IPV4)

fromIpString

public static InetAddress fromIpString(String address)

从String转换为InetAddress. IpString可以是ipv4 或 ipv6 string, 但不可以是域名. 先字符串传换为byte[]再调getByAddress(byte[])，避免了调用getByName(ip)可能引起的DNS访问.

fromIpv4String

public static Inet4Address fromIpv4String(String address)

从IPv4String转换为InetAddress. IpString如果确定ipv4, 使用本方法减少字符分析消耗 . 先字符串传换为byte[]再调getByAddress(byte[])，避免了调用getByName(ip)可能引起的DNS访问.

intToIpv4String

public static String intToIpv4String(int i)

int转换到IPV4 String, from Netty NetUtil

ipv4StringToInt

public static int ipv4StringToInt(String ipv4Str)

Ipv4 String 转换到int