java的OutputStream的类型
时间:2007-05-28 yycnet.yeah.net yyc译
这一类别包括的类决定了我们的输入往何处去:
一个字节数组(但没有String;假定我们可用字节数组创建一个);一个文件;或者一个“管道”。除此以外,FilterOutputStream为“破坏器”类提供了一个基础类,它将属性或者有用的接口同输出流连接起来。这将在以后讨论。表10.2 OutputStream的类型
Class
|
Function
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Constructor Arguments
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How to use it
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ByteArray-OutputStream
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Creates a buffer in memory. All the data that you send to the stream is placed in this buffer.
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Optional initial size of the buffer.
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To designate the destination of your data. Connect it to a FilterOutputStream object to provide a useful interface.
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File-OutputStream
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For sending information to a file.
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A String representing the file name, or a File or FileDescriptor object.
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To designate the destination of your data. Connect it to a FilterOutputStream object to provide a useful interface.
|
Piped-OutputStream
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Any information you write to this automatically ends up as input for the associated PipedInput-Stream. Implements the “piping” concept.
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PipedInputStream
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To designate the destination of your data for multithreading. Connect it to a FilterOutputStream object to provide a useful interface.
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Filter-OutputStream
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Abstract class which is an interface for decorators that provide useful functionality to the other OutputStream classes. See Table 10-4.
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See Table 10-4.
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See Table 10-4.
|
类 功能 构建器参数/如何使用ByteArrayOutputStream 在内存中创建一个缓冲区。我们发送给流的所有数据都会置入这个缓冲区。 可选缓冲区的初始大小/用于指出数据的目的地。若将其同FilterOutputStream对象连接到一起,可提供一个有用的接口FileOutputStream 将信息发给一个文件 用一个String代表文件名,或选用一个File或FileDescriptor对象/用于指出数据的目的地。若将其同FilterOutputStream对象连接到一起,可提供一个有用的接口PipedOutputStream 我们写给它的任何信息都会自动成为相关的PipedInputStream的输出。实现了“管道化”的概念 PipedInputStream/为多线程处理指出自己数据的目的地/将其同FilterOutputStream对象连接到一起 |