com.qiniu.util

类 Hex

java.lang.Object

com.qiniu.util.Hex

public final class Hex
extends java.lang.Object

Converts hexadecimal Strings. This class is thread-safe.

从以下版本开始:

1.1

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	Hex.HexDecodeException

方法概要

限定符和类型	方法和说明
static byte[]	decodeHex(char[] data) Converts an array of characters representing hexadecimal values into an array of bytes of those same values.
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.
static java.lang.String	encodeHexString(byte[] data) Converts an array of bytes into a String representing the hexadecimal values of each byte in order.
protected static int	toDigit(char ch, int index) Converts a hexadecimal character to an integer.

从类继承的方法 java.lang.Object

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

方法详细资料

decodeHex

public static byte[] decodeHex(char[] data)
                        throws Hex.HexDecodeException

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.

参数:

data - An array of characters containing hexadecimal digits

返回:

A byte array containing binary data decoded from the supplied char array.

抛出:

Hex.HexDecodeException - Thrown if an odd number or illegal of characters is supplied

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.

参数:

data - a byte[] to convert to Hex characters

返回:

A char[] containing hexadecimal characters

encodeHex

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.

参数:

data - a byte[] to convert to Hex characters

toLowerCase - true converts to lowercase, false to uppercase

返回:

A char[] containing hexadecimal characters

从以下版本开始:

1.4

encodeHexString

public static java.lang.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.

参数:

data - a byte[] to convert to Hex characters

返回:

A String containing hexadecimal characters

从以下版本开始:

1.4

toDigit

protected static int toDigit(char ch,
                             int index)
                      throws Hex.HexDecodeException

Converts a hexadecimal character to an integer.

参数:

ch - A character to convert to an integer digit

index - The index of the character in the source

返回:

An integer

抛出:

Hex.HexDecodeException - Thrown if ch is an illegal hex character