java的InputStream的类型
时间:2007-05-28 yycnet.yeah.net yyc译
InputStream的作用是标志那些从不同起源地产生输入的类。这些起源地包括（每个都有一个相关的InputStream子类）：(1) 字节数组(2) String对象(3) 文件(4) “管道”，它的工作原理与现实生活中的管道类似：将一些东西置入一端，它们在另一端出来。 (5) 一系列其他流，以便我们将其统一收集到单独一个流内。(6) 其他起源地，如Internet连接等（将在本书后面的部分讲述）。除此以外，FilterInputStream也属于InputStream的一种类型，用它可为“破坏器”类提供一个基础类，以便将属性或者有用的接口同输入流连接到一起。这将在以后讨论。
|
Class
|
Function
|
Constructor Arguments
|
|
How to use it
|
|
ByteArray-InputStream
|
Allows a buffer in memory to be used as an InputStream.
|
The buffer from which to extract the bytes.
|
|
As a source of data. Connect it to a FilterInputStream object to provide a useful interface.
|
|
StringBuffer-InputStream
|
Converts a String into an InputStream.
|
A String. The underlying implementation actually uses a StringBuffer.
|
|
As a source of data. Connect it to a FilterInputStream object to provide a useful interface.
|
|
File-InputStream
|
For reading information from a file.
|
A String representing the file name, or a File or FileDescriptor object.
|
|
As a source of data. Connect it to a FilterInputStream object to provide a useful interface.
|
类 功能 构建器参数／如何使用ByteArrayInputStream 允许内存中的一个缓冲区作为InputStream使用 从中提取字节的缓冲区／作为一个数据源使用。通过将其同一个FilterInputStream对象连接，可提供一个有用的接口StringBufferInputStream 将一个String转换成InputStream 一个String（字串）。基础的实施方案实际采用一个StringBuffer（字串缓冲）／作为一个数据源使用。通过将其同一个FilterInputStream对象连接，可提供一个有用的接口FileInputStream 用于从文件读取信息 代表文件名的一个String，或者一个File或FileDescriptor对象／作为一个数据源使用。通过将其同一个FilterInputStream对象连接，可提供一个有用的接口
|
Piped-InputStream
|
Produces the data that’s being written to the associated PipedOutput-Stream. Implements the “piping” concept.
|
PipedOutputStream
|
|
As a source of data in multithreading. Connect it to a FilterInputStream object to provide a useful interface.
|
|
Sequence-InputStream
|
Coverts two or more InputStream objects into a single InputStream.
|
Two InputStream objects or an Enumeration for a container of InputStream objects.
|
|
As a source of data. Connect it to a FilterInputStream object to provide a useful interface.
|
|
Filter-InputStream
|
Abstract class which is an interface for decorators that provide useful functionality to the other InputStream classes. See Table 10-3.
|
See Table 10-3.
|
|
See Table 10-3.
|
|
