用下面两个方法,先作个标记,再reset到那个位置。(int readlimit)
Marks the current position in this input stream.reset()
Repositions this stream to the position at the time the method was last called on this input stream.
Marks the current position in this input stream.reset()
Repositions this stream to the position at the time the method was last called on this input stream.
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