cn.ujava.common.io.checksum.crc16

Class CRC16Checksum

java.lang.Object

cn.ujava.common.io.checksum.crc16.CRC16Checksum

All Implemented Interfaces:

Serializable, Checksum

Direct Known Subclasses:

CRC16Ansi, CRC16CCITT, CRC16CCITTFalse, CRC16DNP, CRC16IBM, CRC16Maxim, CRC16Modbus, CRC16USB, CRC16X25, CRC16XModem

public abstract class CRC16Checksum
extends Object
implements Checksum, Serializable

CRC16 Checksum，用于提供多种CRC16算法的通用实现
通过继承此类，重写update和reset完成相应算法。

Author:

ujava

Since:

5.3.10

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	wCRCin CRC16 Checksum 结果值

Constructor Summary

Constructors

Constructor and Description
CRC16Checksum()

Method Summary

Modifier and Type	Method and Description
String	getHexValue() 获取16进制的CRC16值
String	getHexValue(boolean isPadding) 获取16进制的CRC16值
long	getValue()
void	reset()
void	update(byte[] b) 计算全部字节
void	update(byte[] b, int off, int len)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.zip.Checksum

update

Field Detail

wCRCin

protected int wCRCin

CRC16 Checksum 结果值

Constructor Detail

CRC16Checksum

public CRC16Checksum()

Method Detail

getValue

public long getValue()

Specified by:

getValue in interface Checksum

getHexValue

public String getHexValue()

获取16进制的CRC16值

Returns:

16进制的CRC16值

getHexValue

public String getHexValue(boolean isPadding)

获取16进制的CRC16值

Parameters:

isPadding - 不足4位时，是否填充0以满足位数

Returns:

16进制的CRC16值，4位

reset

public void reset()

Specified by:

reset in interface Checksum

update

public void update(byte[] b)

计算全部字节

Parameters:

b - 字节

update

public void update(byte[] b,
                   int off,
                   int len)

Specified by:

update in interface Checksum