com.sun.mail.util
类 BASE64EncoderStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          com.sun.mail.util.BASE64EncoderStream

所有已实现的接口：

Closeable, Flushable

直接已知子类：

BEncoderStream

public class BASE64EncoderStream
extends FilterOutputStream

This class implements a BASE64 encoder. It is implemented as a FilterOutputStream, so one can just wrap this class around any output stream and write bytes into this filter. The encoding is done as the bytes are written out.

作者：

John Mani, Bill Shannon

字段摘要

从类 java.io.FilterOutputStream 继承的字段

out

构造方法摘要

BASE64EncoderStream(OutputStream out)
Create a BASE64 encoder that encodes the specified input stream.

BASE64EncoderStream(OutputStream out, int bytesPerLine)
Create a BASE64 encoder that encodes the specified output stream.

方法摘要

void	close() Forces any buffered output bytes to be encoded out to the stream and closes this output stream
static byte[]	encode(byte[] inbuf) Base64 encode a byte array.
void	flush() Flushes this output stream and forces any buffered output bytes to be encoded out to the stream.
void	write(byte[] b) Encodes b.length bytes to this output stream.
void	write(byte[] b, int off, int len) Encodes len bytes from the specified byte array starting at offset off to this output stream.
void	write(int c) Encodes the specified byte to this output stream.

从类 java.lang.Object 继承的方法

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

构造方法详细信息

BASE64EncoderStream

public BASE64EncoderStream(OutputStream out,
                           int bytesPerLine)

Create a BASE64 encoder that encodes the specified output stream.

参数：

out - the output stream

bytesPerLine - number of bytes per line. The encoder inserts a CRLF sequence after the specified number of bytes, unless bytesPerLine is Integer.MAX_VALUE, in which case no CRLF is inserted. bytesPerLine is rounded down to a multiple of 4.

BASE64EncoderStream

public BASE64EncoderStream(OutputStream out)

Create a BASE64 encoder that encodes the specified input stream. Inserts the CRLF sequence after outputting 76 bytes.

参数：

out - the output stream

方法详细信息

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Encodes len bytes from the specified byte array starting at offset off to this output stream.

覆盖：

类 FilterOutputStream 中的 write

参数：

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

抛出：

IOException - if an I/O error occurs.

write

public void write(byte[] b)
           throws IOException

Encodes b.length bytes to this output stream.

覆盖：

类 FilterOutputStream 中的 write

参数：

b - the data to be written.

抛出：

IOException - if an I/O error occurs.

write

public void write(int c)
           throws IOException

Encodes the specified byte to this output stream.

覆盖：

类 FilterOutputStream 中的 write

参数：

c - the byte.

抛出：

IOException - if an I/O error occurs.

flush

public void flush()
           throws IOException

Flushes this output stream and forces any buffered output bytes to be encoded out to the stream.

指定者：

接口 Flushable 中的 flush

覆盖：

类 FilterOutputStream 中的 flush

抛出：

IOException - if an I/O error occurs.

close

public void close()
           throws IOException

Forces any buffered output bytes to be encoded out to the stream and closes this output stream

指定者：

接口 Closeable 中的 close

覆盖：

类 FilterOutputStream 中的 close

抛出：

IOException

encode

public static byte[] encode(byte[] inbuf)

Base64 encode a byte array. No line breaks are inserted. This method is suitable for short strings, such as those in the IMAP AUTHENTICATE protocol, but not to encode the entire content of a MIME part.