net.iotgw.mail.util

类 QPDecoderStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

net.iotgw.mail.util.QPDecoderStream

所有已实现的接口:

Closeable, AutoCloseable

直接已知子类:

QDecoderStream

public class QPDecoderStream
extends FilterInputStream

This class implements a QP Decoder. It is implemented as a FilterInputStream, so one can just wrap this class around any input stream and read bytes from this filter. The decoding is done as the bytes are read out.

作者:

John Mani

字段概要

字段

限定符和类型	字段和说明
protected byte[]	ba
protected int	spaces

从类继承的字段 java.io.FilterInputStream

in

构造器概要

构造器

构造器和说明
QPDecoderStream(InputStream in) Create a Quoted Printable decoder that decodes the specified input stream.

方法概要

限定符和类型	方法和说明
int	available() Returns the number of bytes that can be read from this input stream without blocking.
boolean	markSupported() Tests if this input stream supports marks.
int	read() Read the next decoded byte from this input stream.
int	read(byte[] buf, int off, int len) Reads up to len decoded bytes of data from this input stream into an array of bytes.
long	skip(long n) Skips over and discards n bytes of data from this stream.

从类继承的方法 java.io.FilterInputStream

close, mark, read, reset

从类继承的方法 java.lang.Object

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

字段详细资料

ba

protected byte[] ba

spaces

protected int spaces

构造器详细资料

QPDecoderStream

public QPDecoderStream(InputStream in)

Create a Quoted Printable decoder that decodes the specified input stream.

参数:

in - the input stream

方法详细资料

read

public int read()
         throws IOException

Read the next decoded byte from this input stream. The byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

覆盖:

read 在类中 FilterInputStream

返回:

the next byte of data, or -1 if the end of the stream is reached.

抛出:

IOException - if an I/O error occurs.

read

public int read(byte[] buf,
                int off,
                int len)
         throws IOException

Reads up to len decoded bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

覆盖:

read 在类中 FilterInputStream

参数:

buf - the buffer into which the data is read.

off - the start offset of the data.

len - the maximum number of bytes read.

返回:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

抛出:

IOException - if an I/O error occurs.

skip

public long skip(long n)
          throws IOException

Skips over and discards n bytes of data from this stream.

覆盖:

skip 在类中 FilterInputStream

抛出:

IOException

markSupported

public boolean markSupported()

Tests if this input stream supports marks. Currently this class does not support marks

覆盖:

markSupported 在类中 FilterInputStream

available

public int available()
              throws IOException

Returns the number of bytes that can be read from this input stream without blocking. The QP algorithm does not permit a priori knowledge of the number of bytes after decoding, so this method just invokes the available method of the original input stream.

覆盖:

available 在类中 FilterInputStream

抛出:

IOException