public class FileChannelCopier extends IoCopier<FileChannel,FileChannel>
FileChannel 数据拷贝封装
FileChannel#transferTo 或 FileChannel#transferFrom 的实现是平台相关的，需要确保低版本平台的兼容性
例如 android 7以下平台在使用 ZipInputStream 解压文件的过程中，
通过 FileChannel#transferFrom 传输到文件时，其返回值可能小于 totalBytes，不处理将导致文件内容缺失
// 错误写法，dstChannel.transferFrom 返回值小于 zipEntry.getSize()，导致解压后文件内容缺失
try (InputStream srcStream = zipFile.getInputStream(zipEntry);
ReadableByteChannel srcChannel = Channels.newChannel(srcStream);
FileOutputStream fos = new FileOutputStream(saveFile);
FileChannel dstChannel = fos.getChannel()) {
dstChannel.transferFrom(srcChannel, 0, zipEntry.getSize());
}
bufferSize, count, flushEveryBuffer, progress| Constructor and Description |
|---|
FileChannelCopier(long count)
构造
|
| Modifier and Type | Method and Description |
|---|---|
long |
copy(FileChannel source,
FileChannel target)
执行拷贝
|
long |
copy(FileInputStream in,
FileOutputStream out)
拷贝文件流，使用NIO
|
static FileChannelCopier |
of()
创建
FileChannel 拷贝器 |
static FileChannelCopier |
of(long count)
创建
FileChannel 拷贝器 |
bufferSize, setFlushEveryBufferpublic FileChannelCopier(long count)
count - 拷贝总数，-1表示无限制public static FileChannelCopier of()
FileChannel 拷贝器public static FileChannelCopier of(long count)
FileChannel 拷贝器count - 拷贝总数，-1表示无限制public long copy(FileInputStream in, FileOutputStream out) throws IORuntimeException
in - 输入out - 输出IORuntimeException - IO异常public long copy(FileChannel source, FileChannel target)
IoCopiercopy in class IoCopier<FileChannel,FileChannel>source - 拷贝源，如InputStream、Reader等target - 拷贝目标，如OutputStream、Writer等Copyright © 2025. All rights reserved.