java - Mimetypes for ImageIO read() and write() -

i trying use mime types define output imageio. simple write() method

public static boolean write(renderedimage im,             string formatname,             outputstream output)                      throws ioexception 

uses " informal name of format." (e.g. "png"). there simple equivalent mimetypes (e.g. "image/png") or failing code achieves purpose of writing image? starting point have found is

public static iterator<imagewriter> getimagewritersbymimetype(string mimetype) 

which seems more complex, requiring imagewriter, iiostream etc. , haven't managed create solution.

update: reason using mime is formal part of image in svg, e.g.

 xlink:href="data:image/png;base64,ivborw0kggoaaaa... 

and seemed appropriate use rather converting less defined "informal" formats. managed find precise solution (in java2s.com) question , have added answer.

i printed list of imageio informal formats, using getreaderformatnames method, on windows xp, java 6 computer.

bmp, bmp, jpg, jpg, wbmp, jpeg, png, png, jpeg, wbmp, gif, gif 

here equivalent mime types

image/bmp image/jpeg image/png image/gif 

i couldn't find mime wbmp format.

seems strip off "image/" mime pass informal format imageio read or write methods.