jexx.io

类 NetUtil

java.lang.Object

jexx.io.NetUtil

public class NetUtil
extends java.lang.Object

Network utilities.

字段概要

字段

限定符和类型	字段和说明
static java.lang.String	DEFAULT_MASK
static int	INT_VALUE_127_0_0_1
static java.lang.String	LOCAL_HOST
static java.lang.String	LOCAL_IP

构造器概要

构造器

构造器和说明
NetUtil()

方法概要

限定符和类型	方法和说明
static byte[]	downloadBytes(java.lang.String url) Downloads resource as byte array.
static void	downloadFile(java.lang.String url, java.io.File file) Downloads resource to a file, potentially very efficiently.
static java.lang.String	downloadString(java.lang.String url) Downloads resource as String.
static java.lang.String	downloadString(java.lang.String url, java.nio.charset.Charset charset) Downloads resource as String.
static int	getIpAsInt(java.lang.String ipAddress) Returns IP address as integer.
static int	getMaskAsInt(java.lang.String mask)
static boolean	isSocketAccessAllowed(int localIp, int socketIp, int mask)
static java.lang.String	resolveHostName(byte[] ip) Resolves host name from IP address bytes.
static java.lang.String	resolveIpAddress(java.lang.String hostname) Resolves IP address from a hostname.
static boolean	validateAgaintIPAdressV4Format(java.lang.String input) Checks given string against IP address v4 format.

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

LOCAL_HOST

public static final java.lang.String LOCAL_HOST

另请参阅:

常量字段值

LOCAL_IP

public static final java.lang.String LOCAL_IP

另请参阅:

常量字段值

DEFAULT_MASK

public static final java.lang.String DEFAULT_MASK

另请参阅:

常量字段值

INT_VALUE_127_0_0_1

public static final int INT_VALUE_127_0_0_1

另请参阅:

常量字段值

构造器详细资料

NetUtil

public NetUtil()

方法详细资料

resolveIpAddress

public static java.lang.String resolveIpAddress(java.lang.String hostname)

Resolves IP address from a hostname.

getIpAsInt

public static int getIpAsInt(java.lang.String ipAddress)

Returns IP address as integer.

getMaskAsInt

public static int getMaskAsInt(java.lang.String mask)

isSocketAccessAllowed

public static boolean isSocketAccessAllowed(int localIp,
                                            int socketIp,
                                            int mask)

validateAgaintIPAdressV4Format

public static boolean validateAgaintIPAdressV4Format(java.lang.String input)

Checks given string against IP address v4 format.

参数:

input - an ip address - may be null

返回:

true if param has a valid ip v4 format false otherwise

另请参阅:

ip address v4

resolveHostName

public static java.lang.String resolveHostName(byte[] ip)

Resolves host name from IP address bytes.

downloadBytes

public static byte[] downloadBytes(java.lang.String url)
                            throws java.io.IOException

Downloads resource as byte array.

抛出:

java.io.IOException

downloadString

public static java.lang.String downloadString(java.lang.String url,
                                              java.nio.charset.Charset charset)
                                       throws java.io.IOException

Downloads resource as String.

抛出:

java.io.IOException

downloadString

public static java.lang.String downloadString(java.lang.String url)
                                       throws java.io.IOException

Downloads resource as String.

抛出:

java.io.IOException

downloadFile

public static void downloadFile(java.lang.String url,
                                java.io.File file)
                         throws java.io.IOException

Downloads resource to a file, potentially very efficiently.

抛出:

java.io.IOException