javax.servlet
类 ServletInputStream

java.lang.Object
  java.io.InputStream
      javax.servlet.ServletInputStream

所有已实现的接口：

Closeable

直接已知子类：

Ajp13Parser.Input, HttpInput

public abstract class ServletInputStream
extends 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.

作者：

Various

另请参见：

ServletRequest

构造方法摘要

protected

ServletInputStream() Does nothing, because this is an abstract class.

方法摘要

int	readLine(byte[] b, int off, int len) Reads the input stream, one line at a time.

从类 java.io.InputStream 继承的方法

available, close, mark, markSupported, read, read, 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

ServletInputStream

protected ServletInputStream()

Does nothing, because this is an abstract class.

方法详细信息

readLine

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

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 input or output exception has occurred