cn.hutool.core.io.copy

Class IoCopier<S,T>

java.lang.Object

cn.hutool.core.io.copy.IoCopier<S,T>

Type Parameters:

S - 拷贝源类型，如InputStream、Reader等

T - 拷贝目标类型，如OutputStream、Writer等

Direct Known Subclasses:

ChannelCopier, ReaderWriterCopier, StreamCopier

public abstract class IoCopier<S,T>
extends Object

IO拷贝抽象，可自定义包括缓存、进度条等信息
此对象非线程安全

Since:

5.7.8

Author:

looly

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bufferSize
protected long	count 拷贝总数
protected boolean	flushEveryBuffer 是否每次写出一个buffer内容就执行flush
protected StreamProgress	progress 进度条

Constructor Summary

Constructors

Constructor and Description
IoCopier(int bufferSize, long count, StreamProgress progress) 构造

Method Summary

Modifier and Type	Method and Description
protected int	bufferSize(long count) 缓存大小，取默认缓存和目标长度最小值
abstract long	copy(S source, T target) 执行拷贝
IoCopier<S,T>	setFlushEveryBuffer(boolean flushEveryBuffer) 设置是否每次写出一个buffer内容就执行flush

Methods inherited from class java.lang.Object

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

Field Detail

bufferSize

protected final int bufferSize

count

protected final long count

拷贝总数

progress

protected StreamProgress progress

进度条

flushEveryBuffer

protected boolean flushEveryBuffer

是否每次写出一个buffer内容就执行flush

Constructor Detail

IoCopier

public IoCopier(int bufferSize,
                long count,
                StreamProgress progress)

构造

Parameters:

bufferSize - 缓存大小，< 0 表示默认NioUtil.DEFAULT_BUFFER_SIZE

count - 拷贝总数，-1表示无限制

progress - 进度条

Method Detail

copy

public abstract long copy(S source,
                          T target)

执行拷贝

Parameters:

source - 拷贝源，如InputStream、Reader等

target - 拷贝目标，如OutputStream、Writer等

Returns:

拷贝的实际长度

bufferSize

protected int bufferSize(long count)

缓存大小，取默认缓存和目标长度最小值

Parameters:

count - 目标长度

Returns:

缓存大小

setFlushEveryBuffer

public IoCopier<S,T> setFlushEveryBuffer(boolean flushEveryBuffer)

设置是否每次写出一个buffer内容就执行flush

Parameters:

flushEveryBuffer - 是否每次写出一个buffer内容就执行flush

Returns:

this

Since:

5.7.18