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Sounds simple right? Use
ImageIO.read(new ByteArrayInputStream(bytes));
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);
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?
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.
826
You can try to generate an image from the byte array and check for the ArgumentException if its not. Show activity on this post. Most other types of image files have similar magick numbers. But checking that won't actually tell you if the file is a valid image file.
Convert byte[] array to File using Java In order to convert a byte array to a file, we will be using a method named the getBytes() method of String class. Implementation: Convert a String into a byte array and write it in a file.
You can simply iterate the byte array and print the byte using System. out. println() method.
Haven't played with ImageIO in a awhile, and have not tested this, but I seem to recall something like this working. (since you say you know your file is a jpg and not a bitmap, I am using that information to help find the right loader).
String inFormat = "jpg";
Iterator inReaders = ImageIO.getImageReadersByFormatName(inFormat);
...
nextInReader.setInput( iis );
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