ByteUtil (hutool 5.8.41 API)

java.lang.Object
- cn.hutool.core.util.ByteUtil

```
public class ByteUtil
extends Object
```
对数字和字节进行转换。
假设数据存储是以大端模式存储的：
- byte: 字节类型占8位二进制 00000000
- char: 字符类型占2个字节 16位二进制 byte[0] byte[1]
- int : 整数类型占4个字节 32位二进制 byte[0] byte[1] byte[2] byte[3]
- long: 长整数类型占8个字节 64位二进制 byte[0] byte[1] byte[2] byte[3] byte[4] byte[5]
- long: 长整数类型占8个字节 64位二进制 byte[0] byte[1] byte[2] byte[3] byte[4] byte[5] byte[6] byte[7]
- float: 浮点数(小数) 占4个字节 32位二进制 byte[0] byte[1] byte[2] byte[3]
- double: 双精度浮点数(小数) 占8个字节 64位二进制 byte[0] byte[1] byte[2] byte[3] byte[4]byte[5] byte[6] byte[7]
注：注释来自Hanlp，代码提供来自pr#1492@Github
Since:

5.6.3

Author:

looly, hanlp, FULaBUla

Field Summary

Fields
Modifier and Type Field and Description

static ByteOrder CPU_ENDIAN
CPU的字节序

static ByteOrder DEFAULT_ORDER

Fields
Modifier and Type	Field and Description
`static ByteOrder`	`CPU_ENDIAN` CPU的字节序
`static ByteOrder`	`DEFAULT_ORDER`

Constructor Summary

Constructors
Constructor and Description

ByteUtil()

Constructors
Constructor and Description
`ByteUtil()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static double`	`bytesToDouble(byte[] bytes)` byte数组转Double 默认以小端序转换
`static double`	`bytesToDouble(byte[] bytes, ByteOrder byteOrder)` byte数组转double 自定义端序
`static float`	`bytesToFloat(byte[] bytes)` byte数组转float 默认以小端序转换
`static float`	`bytesToFloat(byte[] bytes, ByteOrder byteOrder)` byte数组转float 自定义端序
`static int`	`bytesToInt(byte[] bytes)` byte[]转int值默认以小端序转换
`static int`	`bytesToInt(byte[] bytes, ByteOrder byteOrder)` byte[]转int值自定义端序
`static int`	`bytesToInt(byte[] bytes, int start, ByteOrder byteOrder)` byte[]转int值自定义端序
`static long`	`bytesToLong(byte[] bytes)` byte数组转long 默认以小端序转换 from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
`static long`	`bytesToLong(byte[] bytes, ByteOrder byteOrder)` byte数组转long 自定义端序 from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
`static long`	`bytesToLong(byte[] bytes, int start, ByteOrder byteOrder)` byte数组转long 自定义端序 from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
`static <T extends Number> T`	`bytesToNumber(byte[] bytes, Class<T> targetClass, ByteOrder byteOrder)` byte数组转换为指定类型数字
`static short`	`bytesToShort(byte[] bytes)` byte数组转short 默认以小端序转换
`static short`	`bytesToShort(byte[] bytes, ByteOrder byteOrder)` byte数组转short 自定义端序
`static short`	`bytesToShort(byte[] bytes, int start, ByteOrder byteOrder)` byte数组转short 自定义端序
`static int`	`byteToUnsignedInt(byte byteValue)` byte转无符号int
`static byte[]`	`doubleToBytes(double doubleValue)` double转byte数组默认以小端序转换
`static byte[]`	`doubleToBytes(double doubleValue, ByteOrder byteOrder)` double转byte数组自定义端序 from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
`static byte[]`	`floatToBytes(float floatValue)` float转byte数组，默认以小端序转换
`static byte[]`	`floatToBytes(float floatValue, ByteOrder byteOrder)` float转byte数组，自定义端序
`static byte`	`intToByte(int intValue)` int转byte
`static byte[]`	`intToBytes(int intValue)` int转byte数组默认以小端序转换
`static byte[]`	`intToBytes(int intValue, ByteOrder byteOrder)` int转byte数组自定义端序
`static byte[]`	`longToBytes(long longValue)` long转byte数组默认以小端序转换 from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
`static byte[]`	`longToBytes(long longValue, ByteOrder byteOrder)` long转byte数组自定义端序 from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
`static byte[]`	`numberToBytes(Number number)` 将`Number`转换为
`static byte[]`	`numberToBytes(Number number, ByteOrder byteOrder)` 将`Number`转换为
`static byte[]`	`shortToBytes(short shortValue)` short转byte数组默认以小端序转换
`static byte[]`	`shortToBytes(short shortValue, ByteOrder byteOrder)` short转byte数组自定义端序

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_ORDER
```
public static final ByteOrder DEFAULT_ORDER
```
  - CPU_ENDIAN
```
public static final ByteOrder CPU_ENDIAN
```
    CPU的字节序
- Constructor Detail
  - ByteUtil
```
public ByteUtil()
```
- Method Detail
  - intToByte
```
public static byte intToByte(int intValue)
```
    int转byte
    
    Parameters:
    
    intValue - int值
    
    Returns:
    
    byte值
  - byteToUnsignedInt
```
public static int byteToUnsignedInt(byte byteValue)
```
    byte转无符号int
    
    Parameters:
    
    byteValue - byte值
    
    Returns:
    
    无符号int值
    
    Since:
    
    3.2.0
  - bytesToShort
```
public static short bytesToShort(byte[] bytes)
```
    byte数组转short
    默认以小端序转换
    
    Parameters:
    
    bytes - byte数组
    
    Returns:
    
    short值
  - bytesToShort
```
public static short bytesToShort(byte[] bytes,
                                 ByteOrder byteOrder)
```
    byte数组转short
    自定义端序
    
    Parameters:
    
    bytes - byte数组，长度必须为2
    
    byteOrder - 端序
    
    Returns:
    
    short值
  - bytesToShort
```
public static short bytesToShort(byte[] bytes,
                                 int start,
                                 ByteOrder byteOrder)
```
    byte数组转short
    自定义端序
    
    Parameters:
    
    bytes - byte数组，长度必须大于2
    
    start - 开始位置
    
    byteOrder - 端序
    
    Returns:
    
    short值
  - shortToBytes
```
public static byte[] shortToBytes(short shortValue)
```
    short转byte数组
    默认以小端序转换
    
    Parameters:
    
    shortValue - short值
    
    Returns:
    
    byte数组
  - shortToBytes
```
public static byte[] shortToBytes(short shortValue,
                                  ByteOrder byteOrder)
```
    short转byte数组
    自定义端序
    
    Parameters:
    
    shortValue - short值
    
    byteOrder - 端序
    
    Returns:
    
    byte数组
  - bytesToInt
```
public static int bytesToInt(byte[] bytes)
```
    byte[]转int值
    默认以小端序转换
    
    Parameters:
    
    bytes - byte数组
    
    Returns:
    
    int值
  - bytesToInt
```
public static int bytesToInt(byte[] bytes,
                             ByteOrder byteOrder)
```
    byte[]转int值
    自定义端序
    
    Parameters:
    
    bytes - byte数组
    
    byteOrder - 端序
    
    Returns:
    
    int值
  - bytesToInt
```
public static int bytesToInt(byte[] bytes,
                             int start,
                             ByteOrder byteOrder)
```
    byte[]转int值
    自定义端序
    
    Parameters:
    
    bytes - byte数组
    
    start - 开始位置（包含）
    
    byteOrder - 端序
    
    Returns:
    
    int值
    
    Since:
    
    5.7.21
  - intToBytes
```
public static byte[] intToBytes(int intValue)
```
    int转byte数组
    默认以小端序转换
    
    Parameters:
    
    intValue - int值
    
    Returns:
    
    byte数组
  - intToBytes
```
public static byte[] intToBytes(int intValue,
                                ByteOrder byteOrder)
```
    int转byte数组
    自定义端序
    
    Parameters:
    
    intValue - int值
    
    byteOrder - 端序
    
    Returns:
    
    byte数组
  - longToBytes
```
public static byte[] longToBytes(long longValue)
```
    long转byte数组
    默认以小端序转换
    from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
    
    Parameters:
    
    longValue - long值
    
    Returns:
    
    byte数组
  - longToBytes
```
public static byte[] longToBytes(long longValue,
                                 ByteOrder byteOrder)
```
    long转byte数组
    自定义端序
    from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
    
    Parameters:
    
    longValue - long值
    
    byteOrder - 端序
    
    Returns:
    
    byte数组
  - bytesToLong
```
public static long bytesToLong(byte[] bytes)
```
    byte数组转long
    默认以小端序转换
    from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
    
    Parameters:
    
    bytes - byte数组
    
    Returns:
    
    long值
  - bytesToLong
```
public static long bytesToLong(byte[] bytes,
                               ByteOrder byteOrder)
```
    byte数组转long
    自定义端序
    from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
    
    Parameters:
    
    bytes - byte数组
    
    byteOrder - 端序
    
    Returns:
    
    long值
  - bytesToLong
```
public static long bytesToLong(byte[] bytes,
                               int start,
                               ByteOrder byteOrder)
```
    byte数组转long
    自定义端序
    from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
    
    Parameters:
    
    bytes - byte数组
    
    start - 计算数组开始位置
    
    byteOrder - 端序
    
    Returns:
    
    long值
    
    Since:
    
    5.7.21
  - floatToBytes
```
public static byte[] floatToBytes(float floatValue)
```
    float转byte数组，默认以小端序转换
    
    Parameters:
    
    floatValue - float值
    
    Returns:
    
    byte数组
    
    Since:
    
    5.7.18
  - floatToBytes
```
public static byte[] floatToBytes(float floatValue,
                                  ByteOrder byteOrder)
```
    float转byte数组，自定义端序
    
    Parameters:
    
    floatValue - float值
    
    byteOrder - 端序
    
    Returns:
    
    byte数组
    
    Since:
    
    5.7.18
  - bytesToFloat
```
public static float bytesToFloat(byte[] bytes)
```
    byte数组转float
    默认以小端序转换
    
    Parameters:
    
    bytes - byte数组
    
    Returns:
    
    float值
    
    Since:
    
    5.7.18
  - bytesToFloat
```
public static float bytesToFloat(byte[] bytes,
                                 ByteOrder byteOrder)
```
    byte数组转float
    自定义端序
    
    Parameters:
    
    bytes - byte数组
    
    byteOrder - 端序
    
    Returns:
    
    float值
    
    Since:
    
    5.7.18
  - doubleToBytes
```
public static byte[] doubleToBytes(double doubleValue)
```
    double转byte数组
    默认以小端序转换
    
    Parameters:
    
    doubleValue - double值
    
    Returns:
    
    byte数组
  - doubleToBytes
```
public static byte[] doubleToBytes(double doubleValue,
                                   ByteOrder byteOrder)
```
    double转byte数组
    自定义端序
    from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
    
    Parameters:
    
    doubleValue - double值
    
    byteOrder - 端序
    
    Returns:
    
    byte数组
  - bytesToDouble
```
public static double bytesToDouble(byte[] bytes)
```
    byte数组转Double
    默认以小端序转换
    
    Parameters:
    
    bytes - byte数组
    
    Returns:
    
    long值
  - bytesToDouble
```
public static double bytesToDouble(byte[] bytes,
                                   ByteOrder byteOrder)
```
    byte数组转double
    自定义端序
    
    Parameters:
    
    bytes - byte数组
    
    byteOrder - 端序
    
    Returns:
    
    long值
  - numberToBytes
```
public static byte[] numberToBytes(Number number)
```
    将Number转换为
    
    Parameters:
    
    number - 数字
    
    Returns:
    
    bytes
  - numberToBytes
```
public static byte[] numberToBytes(Number number,
                                   ByteOrder byteOrder)
```
    将Number转换为
    
    Parameters:
    
    number - 数字
    
    byteOrder - 端序
    
    Returns:
    
    bytes
  - bytesToNumber
```
public static <T extends Number> T bytesToNumber(byte[] bytes,
                                                 Class<T> targetClass,
                                                 ByteOrder byteOrder)
                                          throws IllegalArgumentException
```
    byte数组转换为指定类型数字
    
    Type Parameters:
    
    T - 数字类型
    
    Parameters:
    
    bytes - byte数组
    
    targetClass - 目标数字类型
    
    byteOrder - 端序
    
    Returns:
    
    转换后的数字
    
    Throws:
    
    IllegalArgumentException - 不支持的数字类型，如用户自定义数字类型

Class ByteUtil

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_ORDER

CPU_ENDIAN

Constructor Detail

ByteUtil

Method Detail

intToByte

byteToUnsignedInt

bytesToShort

bytesToShort

bytesToShort

shortToBytes

shortToBytes

bytesToInt

bytesToInt

bytesToInt

intToBytes

intToBytes

longToBytes

longToBytes

bytesToLong

bytesToLong

bytesToLong

floatToBytes

floatToBytes

bytesToFloat

bytesToFloat

doubleToBytes

doubleToBytes

bytesToDouble

bytesToDouble

numberToBytes

numberToBytes

bytesToNumber