Should be pretty simple: I have an InputStream where I want to peek at (not read) the first two bytes, i.e. I want the "current position" of the InputStream to stil be at 0 after my peeking. What is the best and safest way to do this?Should be pretty simple: I have an InputStream
阅读背景：
如何查看InputStream中的前两个字节？
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