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IO：
java.io.OutputStream
方法：
FileOutputStream outputs data to disk
As shown in the figure below: It is the output data, and the output is a byte
As shown in the figure below, the output data is to output multiple bytes
The following figure is a file copy, one input channel, one output channel, copied from the source file to the specified file
But copying will be very slow. There are two kinds in the machine, one is solid-state hard disk and the other is mechanical hard disk. Your solid-state hard disk is faster, but every time you request a byte, it will go to the hard disk to get one. , the speed of reading one is slower, and the speed of reading more than one is faster. No matter how big, just read it in 8k mode.
Decorative design mode: Introduction: It is to process (process) on the basis of the original data to form a new product. The current file flow is byte by byte, just like a river, and the water is drawn out with a pipe. This is a The original transportation is transported through a pool for purification, and after the evolution is completed, a processing area is carried out, and then it is packaged into a bottled water, that is to say, it is processed in the original data to form a new product, and then decorated to form a new product. product, decoration is a process
For example: processing the original bytes to form a photo, this kind of processing is a kind of decoding
Beverage example: Add new condiments to form a new product on the basis of the original
As shown in the pictures below, they are all condiments, you can mix them at will
Then write a test class, you can mix and match at will
BufferedOutputStream continues to buffer in memory
ObjectOutputStream
mistake:
