cn.hutool.core.io

Class NioUtil

java.lang.Object

cn.hutool.core.io.NioUtil

Direct Known Subclasses:

IoUtil

public class NioUtil
extends Object

NIO相关工具封装，主要针对Channel读写、拷贝等封装

Since:

5.5.3

Author:

looly

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BUFFER_SIZE 默认缓存大小 8192
static int	DEFAULT_LARGE_BUFFER_SIZE 默认大缓存大小 32768
static int	DEFAULT_MIDDLE_BUFFER_SIZE 默认中等缓存大小 16384
static int	EOF 数据流末尾

Constructor Summary

Constructors

Constructor and Description
NioUtil()

Method Summary

Modifier and Type	Method and Description
static void	close(AutoCloseable closeable) 关闭 关闭失败不会抛出异常
static long	copy(FileChannel inChannel, FileChannel outChannel) 拷贝文件Channel，使用NIO，拷贝后不会关闭channel
static long	copy(ReadableByteChannel in, WritableByteChannel out) 拷贝流，使用NIO，不会关闭channel
static long	copy(ReadableByteChannel in, WritableByteChannel out, int bufferSize) 拷贝流，使用NIO，不会关闭channel
static long	copy(ReadableByteChannel in, WritableByteChannel out, int bufferSize, long count, StreamProgress streamProgress) 拷贝流，使用NIO，不会关闭channel
static long	copy(ReadableByteChannel in, WritableByteChannel out, int bufferSize, StreamProgress streamProgress) 拷贝流，使用NIO，不会关闭channel
static long	copyByNIO(InputStream in, OutputStream out, int bufferSize, long count, StreamProgress streamProgress) 拷贝流 本方法不会关闭流
static long	copyByNIO(InputStream in, OutputStream out, int bufferSize, StreamProgress streamProgress) 拷贝流 thanks to: https://github.com/venusdrogon/feilong-io/blob/master/src/main/java/com/feilong/io/IOWriteUtil.java 本方法不会关闭流
static String	read(FileChannel fileChannel, Charset charset) 从FileChannel中读取内容
static String	read(FileChannel fileChannel, String charsetName) 从FileChannel中读取内容，读取完毕后并不关闭Channel
static FastByteArrayOutputStream	read(ReadableByteChannel channel) 从流中读取内容，读到输出流中
static String	read(ReadableByteChannel channel, Charset charset) 从流中读取内容，读取完毕后并不关闭流
static String	readUtf8(FileChannel fileChannel) 从FileChannel中读取UTF-8编码内容

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

默认缓存大小 8192

See Also:

Constant Field Values

DEFAULT_MIDDLE_BUFFER_SIZE

public static final int DEFAULT_MIDDLE_BUFFER_SIZE

默认中等缓存大小 16384

See Also:

Constant Field Values

DEFAULT_LARGE_BUFFER_SIZE

public static final int DEFAULT_LARGE_BUFFER_SIZE

默认大缓存大小 32768

See Also:

Constant Field Values

EOF

public static final int EOF

数据流末尾

See Also:

Constant Field Values

Constructor Detail

NioUtil

public NioUtil()

Method Detail

copyByNIO

public static long copyByNIO(InputStream in,
                             OutputStream out,
                             int bufferSize,
                             StreamProgress streamProgress)
                      throws IORuntimeException

拷贝流 thanks to: https://github.com/venusdrogon/feilong-io/blob/master/src/main/java/com/feilong/io/IOWriteUtil.java
本方法不会关闭流

Parameters:

in - 输入流

out - 输出流

bufferSize - 缓存大小

streamProgress - 进度条

Returns:

传输的byte数

Throws:

IORuntimeException - IO异常

copyByNIO

public static long copyByNIO(InputStream in,
                             OutputStream out,
                             int bufferSize,
                             long count,
                             StreamProgress streamProgress)
                      throws IORuntimeException

拷贝流
本方法不会关闭流

Parameters:

in - 输入流

out - 输出流

bufferSize - 缓存大小

count - 最大长度

streamProgress - 进度条

Returns:

传输的byte数

Throws:

IORuntimeException - IO异常

Since:

5.7.8

copy

public static long copy(FileChannel inChannel,
                        FileChannel outChannel)
                 throws IORuntimeException

拷贝文件Channel，使用NIO，拷贝后不会关闭channel

Parameters:

inChannel - FileChannel

outChannel - FileChannel

Returns:

拷贝的字节数

Throws:

IORuntimeException - IO异常

Since:

5.5.3

copy

public static long copy(ReadableByteChannel in,
                        WritableByteChannel out)
                 throws IORuntimeException

拷贝流，使用NIO，不会关闭channel

Parameters:

in - ReadableByteChannel

out - WritableByteChannel

Returns:

拷贝的字节数

Throws:

IORuntimeException - IO异常

Since:

4.5.0

copy

public static long copy(ReadableByteChannel in,
                        WritableByteChannel out,
                        int bufferSize)
                 throws IORuntimeException

拷贝流，使用NIO，不会关闭channel

Parameters:

in - ReadableByteChannel

out - WritableByteChannel

bufferSize - 缓冲大小，如果小于等于0，使用默认

Returns:

拷贝的字节数

Throws:

IORuntimeException - IO异常

Since:

4.5.0

copy

public static long copy(ReadableByteChannel in,
                        WritableByteChannel out,
                        int bufferSize,
                        StreamProgress streamProgress)
                 throws IORuntimeException

拷贝流，使用NIO，不会关闭channel

Parameters:

in - ReadableByteChannel

out - WritableByteChannel

bufferSize - 缓冲大小，如果小于等于0，使用默认

streamProgress - StreamProgress进度处理器

Returns:

拷贝的字节数

Throws:

IORuntimeException - IO异常

copy

public static long copy(ReadableByteChannel in,
                        WritableByteChannel out,
                        int bufferSize,
                        long count,
                        StreamProgress streamProgress)
                 throws IORuntimeException

拷贝流，使用NIO，不会关闭channel

Parameters:

in - ReadableByteChannel

out - WritableByteChannel

bufferSize - 缓冲大小，如果小于等于0，使用默认

count - 读取总长度

streamProgress - StreamProgress进度处理器

Returns:

拷贝的字节数

Throws:

IORuntimeException - IO异常

Since:

5.7.8

read

public static String read(ReadableByteChannel channel,
                          Charset charset)
                   throws IORuntimeException

从流中读取内容，读取完毕后并不关闭流

Parameters:

channel - 可读通道，读取完毕后并不关闭通道

charset - 字符集

Returns:

内容

Throws:

IORuntimeException - IO异常

Since:

4.5.0

read

public static FastByteArrayOutputStream read(ReadableByteChannel channel)
                                      throws IORuntimeException

从流中读取内容，读到输出流中

Parameters:

channel - 可读通道，读取完毕后并不关闭通道

Returns:

输出流

Throws:

IORuntimeException - IO异常

readUtf8

public static String readUtf8(FileChannel fileChannel)
                       throws IORuntimeException

从FileChannel中读取UTF-8编码内容

Parameters:

fileChannel - 文件管道

Returns:

内容

Throws:

IORuntimeException - IO异常

read

public static String read(FileChannel fileChannel,
                          String charsetName)
                   throws IORuntimeException

从FileChannel中读取内容，读取完毕后并不关闭Channel

Parameters:

fileChannel - 文件管道

charsetName - 字符集

Returns:

内容

Throws:

IORuntimeException - IO异常

read

public static String read(FileChannel fileChannel,
                          Charset charset)
                   throws IORuntimeException

从FileChannel中读取内容

Parameters:

fileChannel - 文件管道

charset - 字符集

Returns:

内容

Throws:

IORuntimeException - IO异常

close

public static void close(AutoCloseable closeable)

关闭
关闭失败不会抛出异常

Parameters:

closeable - 被关闭的对象