问题描述
我有一个SQL数据库，其中包含存储为字节数组的图像。我已经做了一些搜索，并没有找到很多关于如何将这些转换为JSF页面的可用图像类型。任何帮助将不胜感激！
I have a SQL database that contains images stored as a byte array. I have done some searching and have not found much on how to convert these into a useable Image type for a JSF page. Any help would be greatly appreciated!
提前致谢！
（使用JSF 2.0）
(using JSF 2.0)
推荐答案
只需创建一个控制器，输出正确的媒体类型（image / *）并输出字节。没有必要转换任何东西。如果你想操纵图像，那么你可以使用 ImageIO.read 转换它。但是根据你的问题，听起来你只想显示图像。
Just a create a controller that output the right media type (image/*) and output the bytes. There is no need to convert anything. If you want to manipulate the images then yes you can convert it using ImageIO.read. But from your question it sounds like you just want to display the image.
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
byte[] bytes = ...
resp.setContentType(mimeType);
OutputStream out = resp.getOutputStream();
out.write(bytes);
}
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