com.qiniu.android.utils

Class Crc32

java.lang.Object

com.qiniu.android.utils.Crc32

public final class Crc32
extends java.lang.Object

计算文件或二进制数据的crc32校验码

Constructor Summary

Constructors

Constructor and Description
Crc32()

Method Summary

Modifier and Type	Method and Description
static long	bytes(byte[] data) 计算二进制字节校验码
static long	bytes(byte[] data, int offset, int length) 计算二进制字节校验码
static long	file(java.io.File f) 对文件内容计算crc32校验码

Methods inherited from class java.lang.Object

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

Constructor Detail

Crc32

public Crc32()

Method Detail

bytes

public static long bytes(byte[] data,
                         int offset,
                         int length)

计算二进制字节校验码

Parameters:

data - 二进制数据

offset - 起始字节索引

length - 校验字节长度

Returns:

校验码

bytes

public static long bytes(byte[] data)

计算二进制字节校验码

Parameters:

data - 二进制数据

Returns:

校验码

file

public static long file(java.io.File f)
                 throws java.io.IOException

对文件内容计算crc32校验码

Parameters:

f - 需要计算crc32校验码的文件

Returns:

crc校验码

Throws:

java.io.IOException - 读取文件异常