org.oiue.tools.bytes

Class ByteUtil

java.lang.Object

org.oiue.tools.bytes.ByteUtil

public class ByteUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
ByteUtil()

Method Summary

Modifier and Type	Method and Description
static int	bcdBytes2Int(byte... bs) 将字节数组按BCD解码成10进制的Int类型
static String	bcdBytes2Str(byte... bs) 将字节数组按BCD解码成10进制的String类型
static String	bcdBytes2Str(byte b) 将一个字节按BCD解码成10进制的String类型
static int	bytes2Int(byte... b) 转换从字节数组中0索引开始的4个字节为Int类型
static int	bytes2Int(byte[] b, int pos) 转换从字节数组中pos索引开始的4个字节为Int类型
static int	bytes2Int(byte[] b, int pos, int len) 转换从字节数组中pos索引开始的len个字节为Int类型
static long	bytes2long(byte[] bs) 将8字节的byte数组转成一个long值
static int	charAtReverseNot0(byte[] bytes) 返回bytes数组中从后向前第一个不是0的下标值
static byte[]	double2bytes(double v, int len)
static byte[]	getBytesGBK(String src) GBK编码
static byte[]	int2bytes(int v, int len) Int转换为字节数组，如果转换的字节长度小于4，则忽略相应高位字节
static byte[]	join(byte[] s, byte[] d) 合并两个byte数组
static byte[]	long2bytes(long v) 将64位的long值放到8字节的byte数组
static byte[]	long2bytes(long v, int len)
static boolean	startsWith(byte[] src, byte[] starts) 判断部分字节内容相等
static byte[]	str2bcdBytes(String radix10Str, int len) 10进制字符串转换成BCD编码的字节
static byte[]	str2bcdBytes(String radix10Str, int len, int additional) 10进制字符串转换成BCD编码的字节
static byte[]	toBytes4HexString(String str)
static String	toHexString(byte... bytes) 将字节以16进制字符串显示
static String	toHexString(byte[] bytes, char separated, int pos, int len) 将字节以16进制字符串显示
static String	toHexString(ByteBuffer buf)
static String	toHexString(ByteBuffer buf, int pos, int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteUtil

public ByteUtil()

Method Detail

getBytesGBK

public static byte[] getBytesGBK(String src)

GBK编码

Parameters:

src - 操作源

Returns:

结果

startsWith

public static boolean startsWith(byte[] src,
                                 byte[] starts)

判断部分字节内容相等

Parameters:

src - bytes 源

starts - 对比对象

Returns:

是否相等

long2bytes

public static byte[] long2bytes(long v,
                                int len)

double2bytes

public static byte[] double2bytes(double v,
                                  int len)

long2bytes

public static byte[] long2bytes(long v)

将64位的long值放到8字节的byte数组

Parameters:

v - 数值

Returns:

返回转换后的byte数组

bytes2long

public static long bytes2long(byte[] bs)

将8字节的byte数组转成一个long值

Parameters:

bs - byteArray

Returns:

转换后的long型数值

int2bytes

public static byte[] int2bytes(int v,
                               int len)
                        throws IllegalArgumentException

Int转换为字节数组，如果转换的字节长度小于4，则忽略相应高位字节

Parameters:

v - 值

len - 转换后的字节长度

Returns:

字节由高位到低位存储在数组中索引由低到高(索引0存放最高位，索引1存放次高位...)

Throws:

IllegalArgumentException

bytes2Int

public static int bytes2Int(byte... b)
                     throws NullPointerException,
                            IllegalArgumentException

转换从字节数组中0索引开始的4个字节为Int类型

Parameters:

b - 数组

Returns:

值

Throws:

NullPointerException - 数组为空

IllegalArgumentException - 转换错误

bytes2Int

public static int bytes2Int(byte[] b,
                            int pos)
                     throws NullPointerException,
                            IllegalArgumentException

转换从字节数组中pos索引开始的4个字节为Int类型

Parameters:

b - 数组

pos - 索引

Returns:

值

Throws:

NullPointerException - 数组为空

IllegalArgumentException - 转换错误

bytes2Int

public static int bytes2Int(byte[] b,
                            int pos,
                            int len)

转换从字节数组中pos索引开始的len个字节为Int类型

Parameters:

b - 数组

pos - 索引

len - 小于等于4字节

Returns:

值

bcdBytes2Int

public static int bcdBytes2Int(byte... bs)
                        throws NullPointerException,
                               IllegalArgumentException

将字节数组按BCD解码成10进制的Int类型

Parameters:

bs - 数组

Returns:

值

Throws:

NullPointerException - 数组为空

IllegalArgumentException - 转换错误

bcdBytes2Str

public static String bcdBytes2Str(byte b)
                           throws IllegalArgumentException

将一个字节按BCD解码成10进制的String类型

Parameters:

b - 值

Returns:

值

Throws:

IllegalArgumentException - 转换错误

bcdBytes2Str

public static String bcdBytes2Str(byte... bs)
                           throws IllegalArgumentException

将字节数组按BCD解码成10进制的String类型

Parameters:

bs - 数组

Returns:

值

Throws:

IllegalArgumentException - 转换错误

str2bcdBytes

public static byte[] str2bcdBytes(String radix10Str,
                                  int len)

10进制字符串转换成BCD编码的字节

Parameters:

radix10Str - 值

len - 字节长度

Returns:

数组

str2bcdBytes

public static byte[] str2bcdBytes(String radix10Str,
                                  int len,
                                  int additional)

10进制字符串转换成BCD编码的字节

Parameters:

radix10Str - 数值

len - 字节长度

additional - 位数不足时补充的内容(前面填充)

Returns:

转换后

join

public static byte[] join(byte[] s,
                          byte[] d)

合并两个byte数组

Parameters:

s - 源

d - 源2

Returns:

合并后

charAtReverseNot0

public static int charAtReverseNot0(byte[] bytes)

返回bytes数组中从后向前第一个不是0的下标值

Parameters:

bytes - 数组

Returns:

下标

toHexString

public static String toHexString(byte... bytes)

将字节以16进制字符串显示

Parameters:

bytes - 数组

Returns:

字符串

toHexString

public static String toHexString(byte[] bytes,
                                 char separated,
                                 int pos,
                                 int len)

将字节以16进制字符串显示

Parameters:

bytes - 数组

separated - 数组

pos - 数组

len - 数组

Returns:

字符串

toHexString

public static String toHexString(ByteBuffer buf)

toHexString

public static String toHexString(ByteBuffer buf,
                                 int pos,
                                 int len)

toBytes4HexString

public static byte[] toBytes4HexString(String str)