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:

java.io.Closeable, java.lang.AutoCloseable

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

构造器概要

构造器

构造器和说明
BufferedServletInputStream(javax.servlet.ServletInputStream in) Creates a BufferedServletInputStream that wraps the provided ServletInputStream.

方法概要

方法

限定符和类型	方法和说明
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.

从类继承的方法 java.io.InputStream

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

从类继承的方法 java.lang.Object

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

构造器详细资料

BufferedServletInputStream

public BufferedServletInputStream(javax.servlet.ServletInputStream in)

Creates a BufferedServletInputStream that wraps the provided ServletInputStream.

参数:

in - a servlet input stream.

方法详细资料

readLine

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

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

覆盖:

readLine 在类中 javax.servlet.ServletInputStream

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:

java.io.IOException - if an I/O error occurs.

read

public int read()
         throws java.io.IOException

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

指定者:

read 在类中 java.io.InputStream

返回:

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

抛出:

java.io.IOException - if an I/O error occurs.

read

public int read(byte[] b,
       int off,
       int len)
         throws java.io.IOException

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

覆盖:

read 在类中 java.io.InputStream

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:

java.io.IOException - if an I/O error occurs.