org.apache.jasper.xmlparser
类 UTF8Reader

java.lang.Object
  java.io.Reader
      org.apache.jasper.xmlparser.UTF8Reader

所有已实现的接口：

Closeable, Readable

public class UTF8Reader
extends Reader

版本：

$Id: UTF8Reader.java,v 1.1.4.2 2011/08/01 02:55:12 hmalphett Exp $

作者：

Andy Clark, IBM

字段摘要

static int	DEFAULT_BUFFER_SIZE Default byte buffer size (2048).
protected byte[]	fBuffer Byte buffer.
protected InputStream	fInputStream Input stream.
protected int	fOffset Offset into buffer.

从类 java.io.Reader 继承的字段

lock

构造方法摘要

UTF8Reader(InputStream inputStream, int size)
Constructs a UTF-8 reader from the specified input stream, buffer size and MessageFormatter.

方法摘要

void	close() Close the stream.
void	mark(int readAheadLimit) Mark the present position in the stream.
boolean	markSupported() Tell whether this stream supports the mark() operation.
int	read() Read a single character.
int	read(char[] ch, int offset, int length) Read characters into a portion of an array.
boolean	ready() Tell whether this stream is ready to be read.
void	reset() Reset the stream.
long	skip(long n) Skip characters.

从类 java.io.Reader 继承的方法

read, read

从类 java.lang.Object 继承的方法

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

字段详细信息

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

Default byte buffer size (2048).

另请参见：

常量字段值

fInputStream

protected InputStream fInputStream

Input stream.

fBuffer

protected byte[] fBuffer

Byte buffer.

fOffset

protected int fOffset

Offset into buffer.

构造方法详细信息

UTF8Reader

public UTF8Reader(InputStream inputStream,
                  int size)

Constructs a UTF-8 reader from the specified input stream, buffer size and MessageFormatter.

参数：

inputStream - The input stream.

size - The initial buffer size.

方法详细信息

read

public int read()
         throws IOException

Read a single character. This method will block until a character is available, an I/O error occurs, or the end of the stream is reached.

Subclasses that intend to support efficient single-character input should override this method.

覆盖：

类 Reader 中的 read

返回：

The character read, as an integer in the range 0 to 16383 (0x00-0xffff), or -1 if the end of the stream has been reached

抛出：

IOException - If an I/O error occurs

read

public int read(char[] ch,
                int offset,
                int length)
         throws IOException

Read characters into a portion of an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.

指定者：

类 Reader 中的 read

参数：

ch - Destination buffer

offset - Offset at which to start storing characters

length - Maximum number of characters to read

返回：

The number of characters read, or -1 if 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

Skip characters. This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached.

覆盖：

类 Reader 中的 skip

参数：

n - The number of characters to skip

返回：

The number of characters actually skipped

抛出：

IOException - If an I/O error occurs

ready

public boolean ready()
              throws IOException

Tell whether this stream is ready to be read.

覆盖：

类 Reader 中的 ready

返回：

True if the next read() is guaranteed not to block for input, false otherwise. Note that returning false does not guarantee that the next read will block.

抛出：

IOException - If an I/O error occurs

markSupported

public boolean markSupported()

Tell whether this stream supports the mark() operation.

覆盖：

类 Reader 中的 markSupported

mark

public void mark(int readAheadLimit)
          throws IOException

Mark the present position in the stream. Subsequent calls to reset() will attempt to reposition the stream to this point. Not all character-input streams support the mark() operation.

覆盖：

类 Reader 中的 mark

参数：

readAheadLimit - Limit on the number of characters that may be read while still preserving the mark. After reading this many characters, attempting to reset the stream may fail.

抛出：

IOException - If the stream does not support mark(), or if some other I/O error occurs

reset

public void reset()
           throws IOException

Reset the stream. If the stream has been marked, then attempt to reposition it at the mark. If the stream has not been marked, then attempt to reset it in some way appropriate to the particular stream, for example by repositioning it to its starting point. Not all character-input streams support the reset() operation, and some support reset() without supporting mark().

覆盖：

类 Reader 中的 reset

抛出：

IOException - If the stream has not been marked, or if the mark has been invalidated, or if the stream does not support reset(), or if some other I/O error occurs

close

public void close()
           throws IOException

Close the stream. Once a stream has been closed, further read(), ready(), mark(), or reset() invocations will throw an IOException. Closing a previously-closed stream, however, has no effect.

指定者：

接口 Closeable 中的 close

指定者：

类 Reader 中的 close

抛出：

IOException - If an I/O error occurs