cn.ponfee.commons.util

类 Bytes

java.lang.Object

cn.ponfee.commons.util.Bytes

public final class Bytes
extends Object

byte[]

 转hex：new BigInteger(1, bytes).toString(16);
 Padding4位：(4 - (length & 0x03)) & 0x03

 左移<<:      该数对应的二进制码整体左移，左边超出的部分舍弃，右边补0
 右移>>:      该数对应的二进制码整体右移，左边部分以原有标志位填充，右边超出的部分舍弃
 无符号右移>>>: 该数对应的二进制码整体右移，左边部分以0填充，右边超出的部分舍弃
 

作者:

Ponfee

构造器概要

构造器

构造器和说明
Bytes()

方法概要

限定符和类型	方法和说明
static byte[]	concat(byte[] first, byte[]... rest) merge byte arrays
static long	crc32(byte[] bytes)
static void	headCopy(byte[] src, byte[] dest) copy src to dest 从首部开始拷贝src到dest： 若src数据不足则在dest后面补tailing 若src数据有多则舍去src后面的数据
static void	headCopy(byte[] src, int srcFrom, int srcLen, byte[] dest, int destFrom, int destLen, byte tailing)
static byte[]	hexDecode(String hex) decode the hex string to byte array
static String	hexDump(byte[] data)
static String	hexDump(byte[] data, int chunk, int block) Dump byte array, like as these HexDump.dump(byte[], long, java.io.OutputStream, int), CharacterEncoder.encode(byte[], java.io.OutputStream);
static String	hexEncode(byte[] bytes)
static String	hexEncode(byte[] bytes, boolean lowercase) encode the byte array the hex string
static String	hexEncode(byte b, boolean lowercase)
static void	hexEncode(char[] charArray, int i, byte b)
static int	putInt(int val, byte[] bytes, int offset) Puts a int number to byte array
static void	tailCopy(byte[] src, byte[] dest)
static void	tailCopy(byte[] src, int destLen)
static void	tailCopy(byte[] src, int srcFrom, int srcLen, byte[] dest, int destFrom, int destLen) copy src to dest 从尾部开始拷贝src到dest： 若src数据不足则在dest前面补0 若src数据有多则舍去src前面的数据
static void	tailCopy(byte[] src, int srcFrom, int srcLen, byte[] dest, int destFrom, int destLen, byte heading) copy src to dest 从尾部开始拷贝src到dest： 若src数据不足则在dest前面补heading 若src数据有多则舍去src前面的数据
static BigDecimal	toBigDecimal(byte[] bytes) Converts a byte array to a BigDecimal
static BigDecimal	toBigDecimal(byte[] bytes, int offset, int length) Converts a byte array to a BigDecimal value
static BigInteger	toBigInteger(byte[] bytes) Converts byte array to positive BigInteger
static String	toBinary(byte... array) convert the byte array to binary string byte: -1: 11111111 0: 00000000 127: 01111111 -128: 10000000
static byte[]	toBytes(BigDecimal val) Convert a BigDecimal value to a byte array
static byte[]	toBytes(char value)
static byte[]	toBytes(char[] chars) Converts char array to byte array
static byte[]	toBytes(char[] chars, Charset charset) Converts char array to byte array
static byte[]	toBytes(double value)
static byte[]	toBytes(float value)
static byte[]	toBytes(int value)
static byte[]	toBytes(long value) convert long value to byte array
static byte[]	toBytes(short value)
static byte[]	toBytes(String value) Converts String to byte array
static byte[]	toBytes(String value, Charset charset) Converts string to byte array
static char	toChar(byte[] bytes)
static char	toChar(byte[] bytes, int fromIdx)
static char[]	toCharArray(byte[] bytes) Converts byte array to char array
static char[]	toCharArray(byte[] bytes, Charset charset) Converts byte array to char array
static double	toDouble(byte[] bytes)
static double	toDouble(byte[] bytes, int fromIdx)
static float	toFloat(byte[] bytes)
static float	toFloat(byte[] bytes, int fromIdx)
static String	toHex(long value) Long value to hex string
static String	toHex(long value, boolean lowercase) Long value to hex string
static int	toInt(byte[] bytes)
static int	toInt(byte[] bytes, int fromIdx)
static long	toLong(byte[] bytes) convert byte array to long number
static long	toLong(byte[] bytes, int fromIdx) convert byte array to long number
static short	toShort(byte[] bytes)
static short	toShort(byte[] bytes, int fromIdx)
static String	toString(byte[] bytes) Converts byte array to String
static String	toString(byte[] bytes, Charset charset) Converts byte array to String

从类继承的方法 java.lang.Object

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

构造器详细资料

Bytes

public Bytes()

方法详细资料

hexDump

public static String hexDump(byte[] data,
                             int chunk,
                             int block)

Dump byte array, like as these HexDump.dump(byte[], long, java.io.OutputStream, int), CharacterEncoder.encode(byte[], java.io.OutputStream);

参数:

data - 字节数组

chunk - 每行块数

block - 每块大小

返回:

Dump the byte array as hex string

hexDump

public static String hexDump(byte[] data)

toBinary

public static String toBinary(byte... array)

convert the byte array to binary string byte: -1: 11111111 0: 00000000 127: 01111111 -128: 10000000

参数:

array -

返回:

hexEncode

public static void hexEncode(char[] charArray,
                             int i,
                             byte b)

hexEncode

public static String hexEncode(byte b,
                               boolean lowercase)

hexEncode

public static String hexEncode(byte[] bytes)

hexEncode

public static String hexEncode(byte[] bytes,
                               boolean lowercase)

encode the byte array the hex string

参数:

bytes -

lowercase -

返回:

hexDecode

public static byte[] hexDecode(String hex)

decode the hex string to byte array

参数:

hex -

返回:

toString

public static String toString(byte[] bytes)

Converts byte array to String

参数:

bytes - the byte array

返回:

a string

toString

public static String toString(byte[] bytes,
                              Charset charset)

Converts byte array to String

参数:

bytes - the byte array

charset - the Charset

返回:

a string

toBytes

public static byte[] toBytes(String value)

Converts String to byte array

参数:

value - the string value

返回:

a byte array

toBytes

public static byte[] toBytes(String value,
                             Charset charset)

Converts string to byte array

参数:

value - the string value

charset - the charset

返回:

a byte array

toCharArray

public static char[] toCharArray(byte[] bytes)

Converts byte array to char array

参数:

bytes - the byte array

返回:

a char array

toCharArray

public static char[] toCharArray(byte[] bytes,
                                 Charset charset)

Converts byte array to char array

参数:

bytes - the byte array

charset - the charset

返回:

a char array

toBytes

public static byte[] toBytes(char[] chars)

Converts char array to byte array

参数:

chars - the char array

返回:

a byte array

toBytes

public static byte[] toBytes(char[] chars,
                             Charset charset)

Converts char array to byte array

参数:

chars - the char array

charset - the charset

返回:

a byte array

toBytes

public static byte[] toBytes(short value)

toShort

public static short toShort(byte[] bytes)

toShort

public static short toShort(byte[] bytes,
                            int fromIdx)

toBytes

public static byte[] toBytes(char value)

toChar

public static char toChar(byte[] bytes)

toChar

public static char toChar(byte[] bytes,
                          int fromIdx)

toBytes

public static byte[] toBytes(int value)

toInt

public static int toInt(byte[] bytes)

toInt

public static int toInt(byte[] bytes,
                        int fromIdx)

toBytes

public static byte[] toBytes(long value)

convert long value to byte array

参数:

value - the long number

返回:

byte array

toLong

public static long toLong(byte[] bytes,
                          int fromIdx)

convert byte array to long number

参数:

bytes - the byte array

fromIdx - the byte array offset

返回:

long number

toLong

public static long toLong(byte[] bytes)

convert byte array to long number

参数:

bytes - the byte array

返回:

toHex

public static String toHex(long value)

Long value to hex string

参数:

value - the long value

返回:

String of long value hex string

toHex

public static String toHex(long value,
                           boolean lowercase)

Long value to hex string

参数:

value - the long value

lowercase - true if lowercase hex string, else uppercase

返回:

String of long value hex string

toBytes

public static byte[] toBytes(float value)

toFloat

public static float toFloat(byte[] bytes)

toFloat

public static float toFloat(byte[] bytes,
                            int fromIdx)

toBytes

public static byte[] toBytes(double value)

toDouble

public static double toDouble(byte[] bytes)

toDouble

public static double toDouble(byte[] bytes,
                              int fromIdx)

toBytes

public static byte[] toBytes(BigDecimal val)

Convert a BigDecimal value to a byte array

参数:

val -

返回:

the byte array

putInt

public static int putInt(int val,
                         byte[] bytes,
                         int offset)

Puts a int number to byte array

参数:

val - the int value

bytes - the byte array

offset - the byte array start offset

返回:

a int of next offset

toBigDecimal

public static BigDecimal toBigDecimal(byte[] bytes)

Converts a byte array to a BigDecimal

参数:

bytes -

返回:

the char value

toBigDecimal

public static BigDecimal toBigDecimal(byte[] bytes,
                                      int offset,
                                      int length)

Converts a byte array to a BigDecimal value

参数:

bytes -

offset -

length -

返回:

the char value

toBigInteger

public static BigInteger toBigInteger(byte[] bytes)

Converts byte array to positive BigInteger

参数:

bytes - the byte array

返回:

a positive BigInteger number

concat

public static byte[] concat(byte[] first,
                            byte[]... rest)

merge byte arrays

参数:

first - first byte array of args

rest - others byte array

返回:

a new byte array of them

tailCopy

public static void tailCopy(byte[] src,
                            int destLen)

tailCopy

public static void tailCopy(byte[] src,
                            byte[] dest)

tailCopy

public static void tailCopy(byte[] src,
                            int srcFrom,
                            int srcLen,
                            byte[] dest,
                            int destFrom,
                            int destLen)

copy src to dest 从尾部开始拷贝src到dest： 若src数据不足则在dest前面补0 若src数据有多则舍去src前面的数据

参数:

src -

srcFrom -

srcLen -

dest -

destFrom -

destLen -

tailCopy

public static void tailCopy(byte[] src,
                            int srcFrom,
                            int srcLen,
                            byte[] dest,
                            int destFrom,
                            int destLen,
                            byte heading)

copy src to dest 从尾部开始拷贝src到dest： 若src数据不足则在dest前面补heading 若src数据有多则舍去src前面的数据

参数:

src -

srcFrom -

srcLen -

dest -

destFrom -

destLen -

heading -

headCopy

public static void headCopy(byte[] src,
                            byte[] dest)

copy src to dest 从首部开始拷贝src到dest： 若src数据不足则在dest后面补tailing 若src数据有多则舍去src后面的数据

参数:

src -

dest -

headCopy

public static void headCopy(byte[] src,
                            int srcFrom,
                            int srcLen,
                            byte[] dest,
                            int destFrom,
                            int destLen,
                            byte tailing)

crc32

public static long crc32(byte[] bytes)