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link管理  ›  Hex (Apache Commons Codec 1.17.1 API)
string each char bytebuffer
https://commons.apache.org/codec/apidocs/org/apache/commons/codec/binary/Hex.html
越狱的牛肉面
4 月前
extends Object implements BinaryEncoder , BinaryDecoder
Converts hexadecimal Strings. The Charset used for certain operation can be set, the default is set in DEFAULT_CHARSET_NAME This class is thread-safe.
Since:
Creates a new codec with the default charset name DEFAULT_CHARSET
Hex ( String charsetName)
Creates a new codec with the given charset name.
Hex ( Charset charset)
Creates a new codec with the given Charset.
decode (byte[] array)
Converts an array of character bytes representing hexadecimal values into an array of bytes of those same values.
Object
decode ( Object object)
Converts a String or an array of character bytes representing hexadecimal values into an array of bytes of those same values.
byte[]
decode ( ByteBuffer buffer)
Converts a buffer of character bytes representing hexadecimal values into an array of bytes of those same values.
static byte[]
decodeHex (char[] data)
Converts an array of characters representing hexadecimal values into an array of bytes of those same values.
static int
decodeHex (char[] data, byte[] out, int outOffset)
Converts an array of characters representing hexadecimal values into an array of bytes of those same values.
static byte[]
decodeHex ( String data)
Converts a String representing hexadecimal values into an array of bytes of those same values.
byte[]
encode (byte[] array)
Converts an array of bytes into an array of bytes for the characters representing the hexadecimal values of each byte in order.
Object
encode ( Object object)
Converts a String or an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
byte[]
encode ( ByteBuffer array)
Converts byte buffer into an array of bytes for the characters representing the hexadecimal values of each byte in order.
static char[]
encodeHex (byte[] data)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
static char[]
encodeHex (byte[] data, boolean toLowerCase)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
protected static char[]
encodeHex (byte[] data, char[] toDigits)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
static char[]
encodeHex (byte[] data, int dataOffset, int dataLen, boolean toLowerCase)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
static void
encodeHex (byte[] data, int dataOffset, int dataLen, boolean toLowerCase, char[] out, int outOffset)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
static char[]
encodeHex ( ByteBuffer data)
Converts a byte buffer into an array of characters representing the hexadecimal values of each byte in order.
static char[]
encodeHex ( ByteBuffer data, boolean toLowerCase)
Converts a byte buffer into an array of characters representing the hexadecimal values of each byte in order.
protected static char[]
encodeHex ( ByteBuffer byteBuffer, char[] toDigits)
Converts a byte buffer into an array of characters representing the hexadecimal values of each byte in order.
static String
encodeHexString (byte[] data)
Converts an array of bytes into a String representing the hexadecimal values of each byte in order.
static String
encodeHexString (byte[] data, boolean toLowerCase)
Converts an array of bytes into a String representing the hexadecimal values of each byte in order.
static String
encodeHexString ( ByteBuffer data)
Converts a byte buffer into a String representing the hexadecimal values of each byte in order.
static String
encodeHexString ( ByteBuffer data, boolean toLowerCase)
Converts a byte buffer into a String representing the hexadecimal values of each byte in order.
Charset
getCharset ()
Gets the charset.
String
getCharsetName ()
Gets the charset name.
protected static int
toDigit (char ch, int index)
Converts a hexadecimal character to an integer.
String
toString ()
Returns a string representation of the object, which includes the charset name.

DEFAULT_CHARSET

public static final Charset DEFAULT_CHARSET
Default charset is StandardCharsets.UTF_8 .
Since:

DEFAULT_CHARSET_NAME

public static final String DEFAULT_CHARSET_NAME
Default charset name is CharEncoding.UTF_8 .
Since:
charsetName - the charset name.
Throws:
UnsupportedCharsetException - If the named charset is unavailable
Since:
1.4, 1.7 throws UnsupportedCharsetException if the named charset is unavailable
public static byte[] decodeHex (char[] data) throws DecoderException
Converts an array of characters representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed array, as it takes two characters to represent any given byte. An exception is thrown if the passed char array has an odd number of elements.
Parameters:
data - An array of characters containing hexadecimal digits
Returns:
A byte array containing binary data decoded from the supplied char array.
Throws:
DecoderException - Thrown if an odd number of characters or illegal characters are supplied
int outOffset) throws DecoderException
Converts an array of characters representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed array, as it takes two characters to represent any given byte. An exception is thrown if the passed char array has an odd number of elements.
Parameters:
data - An array of characters containing hexadecimal digits
out - A byte array to contain the binary data decoded from the supplied char array.
outOffset - The position within out to start writing the decoded bytes.
Returns:
the number of bytes written to out .
Throws:
DecoderException - Thrown if an odd number of characters or illegal characters are supplied
Since:
public static byte[] decodeHex ( String data) throws DecoderException
Converts a String representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed String, as it takes two characters to represent any given byte. An exception is thrown if the passed String has an odd number of elements.
Parameters:
data - A String containing hexadecimal digits
Returns:
A byte array containing binary data decoded from the supplied char array.
Throws:
DecoderException - Thrown if an odd number of characters or illegal characters are supplied
Since:

encodeHex

public static char[] encodeHex (byte[] data)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.
Parameters:
data - a byte[] to convert to hexadecimal characters
Returns:
A char[] containing lower-case hexadecimal characters
public static char[] encodeHex (byte[] data, boolean toLowerCase)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.
Parameters:
data - a byte[] to convert to Hex characters
toLowerCase - true converts to lowercase, false to uppercase
Returns:
A char[] containing hexadecimal characters in the selected case
Since:
protected static char[] encodeHex (byte[] data, char[] toDigits)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.
Parameters:
data - a byte[] to convert to hexadecimal characters
toDigits - the output alphabet (must contain at least 16 chars)
Returns:
A char[] containing the appropriate characters from the alphabet For best results, this should be either upper- or lower-case hex.
Since:
int dataLen, boolean toLowerCase)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
Parameters:
data - a byte[] to convert to hexadecimal characters
dataOffset - the position in data to start encoding from
dataLen - the number of bytes from dataOffset to encode
toLowerCase - true converts to lowercase, false to uppercase
Returns:
A char[] containing the appropriate characters from the alphabet For best results, this should be either upper- or lower-case hex.
Since:
char[] out, int outOffset)
Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
Parameters:
data - a byte[] to convert to hexadecimal characters
dataOffset - the position in data to start encoding from
dataLen - the number of bytes from dataOffset to encode
toLowerCase - true converts to lowercase, false to uppercase
out - a char[] which will hold the resultant appropriate characters from the alphabet.
outOffset - the position within out at which to start writing the encoded characters.
Since:

encodeHex

public static char[] encodeHex ( ByteBuffer data)
Converts a byte buffer into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.

All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

Parameters:
data - a byte buffer to convert to hexadecimal characters
Returns:
A char[] containing lower-case hexadecimal characters
Since:
public static char[] encodeHex ( ByteBuffer data, boolean toLowerCase)
Converts a byte buffer into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.

All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

Parameters:
data - a byte buffer to convert to hexadecimal characters
toLowerCase - true converts to lowercase, false to uppercase
Returns:
A char[] containing hexadecimal characters in the selected case
Since:
protected static char[] encodeHex ( ByteBuffer byteBuffer, char[] toDigits)
Converts a byte buffer into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.

All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

Parameters:
byteBuffer - a byte buffer to convert to hexadecimal characters
toDigits - the output alphabet (must be at least 16 characters)
Returns:
A char[] containing the appropriate characters from the alphabet For best results, this should be either upper- or lower-case hex.
Since:

encodeHexString

public static String encodeHexString (byte[] data)
Converts an array of bytes into a String representing the hexadecimal values of each byte in order. The returned String will be double the length of the passed array, as it takes two characters to represent any given byte.
Parameters:
data - a byte[] to convert to hexadecimal characters
Returns:
A String containing lower-case hexadecimal characters
Since:

encodeHexString

public static String encodeHexString (byte[] data, boolean toLowerCase)
Converts an array of bytes into a String representing the hexadecimal values of each byte in order. The returned String will be double the length of the passed array, as it takes two characters to represent any given byte.
Parameters:
data - a byte[] to convert to hexadecimal characters
toLowerCase - true converts to lowercase, false to uppercase
Returns:
A String containing lower-case hexadecimal characters
Since:

encodeHexString

public static String encodeHexString ( ByteBuffer data)
Converts a byte buffer into a String representing the hexadecimal values of each byte in order. The returned String will be double the length of the passed array, as it takes two characters to represent any given byte.

All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

Parameters:
data - a byte buffer to convert to hexadecimal characters
Returns:
A String containing lower-case hexadecimal characters
Since:

encodeHexString

public static String encodeHexString ( ByteBuffer data, boolean toLowerCase)
Converts a byte buffer into a String representing the hexadecimal values of each byte in order. The returned String will be double the length of the passed array, as it takes two characters to represent any given byte.

All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

Parameters:
data - a byte buffer to convert to hexadecimal characters
toLowerCase - true converts to lowercase, false to uppercase
Returns:
A String containing lower-case hexadecimal characters
Since:
Parameters:
ch - A character to convert to an integer digit
index - The index of the character in the source
Returns:
An integer
Throws:
DecoderException - Thrown if ch is an illegal hexadecimal character
public byte[] decode (byte[] array) throws DecoderException
Converts an array of character bytes representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed array, as it takes two characters to represent any given byte. An exception is thrown if the passed char array has an odd number of elements.
Specified by:
decode in interface BinaryDecoder
Parameters:
array - An array of character bytes containing hexadecimal digits
Returns:
A byte array containing binary data decoded from the supplied byte array (representing characters).
Throws:
DecoderException - Thrown if an odd number of characters is supplied to this function
See Also:
  • decodeHex(char[])
    • public byte[] decode ( ByteBuffer buffer) throws DecoderException
    Converts a buffer of character bytes representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed array, as it takes two characters to represent any given byte. An exception is thrown if the passed char array has an odd number of elements.

    All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

    Parameters:
    buffer - An array of character bytes containing hexadecimal digits
    Returns:
    A byte array containing binary data decoded from the supplied byte array (representing characters).
    Throws:
    DecoderException - Thrown if an odd number of characters is supplied to this function
    Since:
    See Also:
  • decodeHex(char[])
    • public Object decode ( Object object) throws DecoderException
    Converts a String or an array of character bytes representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed String or array, as it takes two characters to represent any given byte. An exception is thrown if the passed char array has an odd number of elements.
    Specified by:
    decode in interface Decoder
    Parameters:
    object - A String, ByteBuffer, byte[], or an array of character bytes containing hexadecimal digits
    Returns:
    A byte array containing binary data decoded from the supplied byte array (representing characters).
    Throws:
    DecoderException - Thrown if an odd number of characters is supplied to this function or the object is not a String or char[]
    See Also:
  • decodeHex(char[])

    • encode

    public byte[] encode (byte[] array)
    Converts an array of bytes into an array of bytes for the characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte. The conversion from hexadecimal characters to the returned bytes is performed with the charset named by getCharset() .
    Specified by:
    encode in interface BinaryEncoder
    Parameters:
    array - a byte[] to convert to hexadecimal characters
    Returns:
    A byte[] containing the bytes of the lower-case hexadecimal characters
    Since:
    1.7 No longer throws IllegalStateException if the charsetName is invalid.
    See Also:
  • encodeHex(byte[])

    • encode

    public byte[] encode ( ByteBuffer array)
    Converts byte buffer into an array of bytes for the characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.

    The conversion from hexadecimal characters to the returned bytes is performed with the charset named by getCharset() .

    All bytes identified by Buffer.remaining() will be used; after this method the value remaining() will be zero.

    Parameters:
    array - a byte buffer to convert to hexadecimal characters
    Returns:
    A byte[] containing the bytes of the lower-case hexadecimal characters
    Since:
    See Also:
  • encodeHex(byte[])
    • public Object encode ( Object object) throws EncoderException
    Converts a String or an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed String or array, as it takes two characters to represent any given byte. The conversion from hexadecimal characters to bytes to be encoded to performed with the charset named by getCharset() .
    Specified by:
    encode in interface Encoder
    Parameters:
    object - a String, ByteBuffer, or byte[] to convert to hexadecimal characters
    Returns:
    A char[] containing lower-case hexadecimal characters
    Throws:
    EncoderException - Thrown if the given object is not a String or byte[]
    See Also:
  • encodeHex(byte[])

    • toString

    public String toString ()
    Returns a string representation of the object, which includes the charset name.
    Overrides:
    toString in class Object
    Returns:
    a string representation of the object.
     
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