com.oreilly.servlet.multipart
类 BufferedServletInputStream

java.lang.Object
  java.io.InputStream
      javax.servlet.ServletInputStream
          com.oreilly.servlet.multipart.BufferedServletInputStream

所有已实现的接口：

Closeable

public class BufferedServletInputStream
extends javax.servlet.ServletInputStream

A BufferedServletInputStream wraps a ServletInputStream in order to provide input buffering and to avoid calling the the readLine method of the wrapped ServletInputStream.

This is necessary because some servlet containers rely on the default implementation of the readLine method provided by the Servlet API classes, which is very slow. Tomcat 3.2, Tomcat 3.1, the JSWDK 1.0 web server and the JSDK2.1 web server are all known to need this class for performance reasons.

Also, it may be used to work around a bug in the Servlet API 2.0 implementation of readLine which contains a bug that causes ArrayIndexOutOfBoundsExceptions under certain conditions. Apache JServ is known to suffer from this bug.

版本：

1.1, 2001/05/21, removed block of commented out code, 1.0, 2000/10/27, initial revision

作者：

Geoff Soutter

构造方法摘要

BufferedServletInputStream(javax.servlet.ServletInputStream in)
Creates a BufferedServletInputStream that wraps the provided ServletInputStream.

方法摘要

int	read() Implement buffering on top of the read method of the wrapped ServletInputStream.
int	read(byte[] b, int off, int len) Implement buffering on top of the read method of the wrapped ServletInputStream.
int	readLine(byte[] b, int off, int len) Implement buffering on top of the readLine method of the wrapped ServletInputStream.

从类 java.io.InputStream 继承的方法

available, close, mark, markSupported, read, reset, skip

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

BufferedServletInputStream

public BufferedServletInputStream(javax.servlet.ServletInputStream in)

Creates a BufferedServletInputStream that wraps the provided ServletInputStream.

参数：

in - a servlet input stream.

方法详细信息

readLine

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

Implement buffering on top of the readLine method of the wrapped ServletInputStream.

覆盖：

类 javax.servlet.ServletInputStream 中的 readLine

参数：

b - an array of bytes into which data is read.

off - an integer specifying the character at which this method begins reading.

len - an integer specifying the maximum number of bytes to read.

返回：

an integer specifying the actual number of bytes read, or -1 if the end of the stream is reached.

抛出：

IOException - if an I/O error occurs.

read

public int read()
         throws IOException

Implement buffering on top of the read method of the wrapped ServletInputStream.

指定者：

类 InputStream 中的 read

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[] b,
                int off,
                int len)
         throws IOException

Implement buffering on top of the read method of the wrapped ServletInputStream.

覆盖：

类 InputStream 中的 read

参数：

b - 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.