I have a buffered image and I need to display it in a JSF page. Is there any UI component available which can display a buffered image directly? I am using JSF 2.2.
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问题:
回答1:
If you only have the buffered image, you could use the Omnifaces library to which allows you to render images by passing a byte[]
to the component
<o:graphicImage value="#{bean.image}" dataURI="true" />
If you have the buffered image you could convert to byte array like so:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write([image],[image_extension], baos);
byte[] imageToPassAsValueAttr = baos.toByteArray();
You could also create a servlet to receive the image id as a get request and from that point on you can get the parameter value, find the resource and write the image content to response.
@BalusC has a nice example here