将字节数组转换为Java中的映像 - 不知道类型 [英] Convert Byte Array to image in Java - without knowing the type

问题描述

听起来很简单吧？使用

ImageIO.read(new ByteArrayInputStream(bytes));

这是皱纹。由于某种原因，它将jpeg检测为bmp，这是我调用时返回的第一个ImageReader

Here's the wrinkle. For some reason it is detecting a jpeg as a bmp, and that is the first ImageReader returned when I call

ImageInputStream iis = ImageIO.createImageInputStream(new ByteArrayInputStream(bytes));
Iterator<ImageReader> readers=ImageIO.getImageReaders(iis);

这会导致图像损坏。有没有办法告诉java没有直接查看标头的字节，并且失败，是否有人知道不同图像的字节标头的良好参考？

This causes the image to come out corrupted. Is there a way to tell through java short of looking directly at the bytes for the header, and failing that does anyone know of a good reference for the byte headers for the different images?

只是让你们知道我还在努力。如果/我有答案，我会通知你。到目前为止，我感谢你们所有人的回复。

Just letting you guys know I am still working on this. I'll let you know if/when I have an answer. I thank all of you for your responses so far.

推荐答案

此页面可能是魔术数字的一个很好的起点。 这里与维基百科类似。

This page might be a good starting point for magic numbers. Here is something similar from Wikipedia.

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