cn.ponfee.disjob.common.util

类 NetUtils

java.lang.Object

cn.ponfee.disjob.common.util.NetUtils

public final class NetUtils
extends Object

IP and Port Helper for RPC

  isAnyLocalAddress  通配符地址        IPv4的通配符地址是0.0.0.0
  isLoopbackAddress  回环地址          IPv4的的范围是127.0.0.0 ~ 127.255.255.255    IPv6的是0:0:0:0:0:0:0:1,也可以简写成::1
  isLinkLocalAddress 本地连接地址       IPv4的的范围是169.254.0.0 ~ 169.254.255.255  IPv6的前12位是FE8，其他的位可以是任意取值
  isSiteLocalAddress 地区本地地址       IPv4的分为三段:10.0.0.0 ~ 10.255.255.255等   IPv6的地区本地地址的前12位是FEC，其他的位可以是任意取值
  isMulticastAddress 广播地址          IPv4的范围是224.0.0.0 ~ 239.255.255.255     IPv6的第一个字节是FF，其他的字节可以是任意值
  isMCGlobal         全球范围的广播地址
  isMCLinkLocal      子网广播地址
  isMCNodeLocal      本地接口广播地址
  isMCOrgLocal       组织范围的广播地址
  isMCSiteLocal      站点范围的广播地址

  host address：host name、ip address
 

作者:

Ponfee

字段概要

字段

限定符和类型	字段和说明
static String	IGNORED_NETWORK_INTERFACE
static String	LOCAL_HOST_NAME
static String	LOCAL_IP_ADDRESS
static String	PREFERRED_NETWORK_INTERFACE

构造器概要

构造器

构造器和说明
NetUtils()

方法概要

限定符和类型	方法和说明
static int	findAvailablePort()
static int	findAvailablePort(int startPort) Returns this server available port
static NetworkInterface	findValidNetworkInterface() Get the suitable NetworkInterface
static String	getHostAddress(String hostName) Gets host address by host name
static String	getHostName(String hostAddress) Gets host name by host address
static String	getLocalHost() Find first valid IP from local network card
static boolean	isAnyHost(String host)
static boolean	isAvailablePort(int port) Check the port is available
static boolean	isConnectableHostPort(String host, int port, int timeout) Returns the hostname port is connectable.
static boolean	isReachableHost(String host)
static boolean	isValidIpAddress(String ip)
static boolean	isValidIpv4Address(InetAddress address)
static boolean	isValidLocalHost(String host)

从类继承的方法 java.lang.Object

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

字段详细资料

IGNORED_NETWORK_INTERFACE

public static final String IGNORED_NETWORK_INTERFACE

另请参阅:

常量字段值

PREFERRED_NETWORK_INTERFACE

public static final String PREFERRED_NETWORK_INTERFACE

另请参阅:

常量字段值

LOCAL_HOST_NAME

public static final String LOCAL_HOST_NAME

另请参阅:

常量字段值

LOCAL_IP_ADDRESS

public static final String LOCAL_IP_ADDRESS

另请参阅:

常量字段值

构造器详细资料

NetUtils

public NetUtils()

方法详细资料

isConnectableHostPort

public static boolean isConnectableHostPort(String host,
                                            int port,
                                            int timeout)

Returns the hostname port is connectable.

参数:

host - the host

port - the port

timeout - the timeout value to be used in milliseconds.

返回:

true if connectable

isAvailablePort

public static boolean isAvailablePort(int port)

Check the port is available

参数:

port - 待测试端口

返回:

if @{code true} is available, else unavailable

isValidIpAddress

public static boolean isValidIpAddress(String ip)

isValidLocalHost

public static boolean isValidLocalHost(String host)

isReachableHost

public static boolean isReachableHost(String host)

isAnyHost

public static boolean isAnyHost(String host)

getLocalHost

public static String getLocalHost()

Find first valid IP from local network card

返回:

first valid local IP

getHostName

public static String getHostName(String hostAddress)

Gets host name by host address

参数:

hostAddress - the host address

返回:

host name

getHostAddress

public static String getHostAddress(String hostName)

Gets host address by host name

参数:

hostName - the host name

返回:

ip address or hostName if UnknownHostException

findAvailablePort

public static int findAvailablePort()

findAvailablePort

public static int findAvailablePort(int startPort)
                             throws IllegalStateException

Returns this server available port

参数:

startPort - the start port

返回:

available port

抛出:

IllegalStateException - if not found

isValidIpv4Address

public static boolean isValidIpv4Address(InetAddress address)

findValidNetworkInterface

public static NetworkInterface findValidNetworkInterface()

Get the suitable NetworkInterface

返回:

If no NetworkInterface is available , return null