javax.servlet
Class ServletInputStream
java.lang.Objectjava.io.InputStreamjavax.servlet.ServletInputStream
public abstract class ServletInputStream
extends java.io.InputStream
Provides an input stream for reading binary data from a client
request, including an efficient
readLine method
for reading data one line at a time. With some protocols, such
as HTTP POST and PUT, a
ServletInputStream
object can be used to read data sent from the client.
A
ServletInputStream object is normally retrieved via
the
ServletRequest.getInputStream() method.
This is an abstract class that a servlet container implements.
Subclasses of this class
must implement the
java.io.InputStream.read() method.
ServletRequest
int | readLine(byte[] b, int off, int len)-
Reads the input stream, one line at a time.
|
ServletInputStream
protected ServletInputStream()
Does nothing, because this is an abstract class.
readLine
public int readLine(byte[] b,
int off,
int len)
throws java.io.IOException
Reads the input stream, one line at a time. Starting at an
offset, reads bytes into an array, until it reads a certain number
of bytes or reaches a newline character, which it reads into the
array as well.
This method returns -1 if it reaches the end of the input
stream before reading the maximum number of bytes.
b - an array of bytes into which data is readoff - an integer specifying the character at which
this method begins readinglen - an integer specifying the maximum number of
bytes to read
- an integer specifying the actual number of bytes
read, or -1 if the end of the stream is reached
java.io.IOException - if an input or output exception has occurred