Como exibir uma imagem fora do contexto com JSF?

Front-end
#1

bom dia, como posso exibir uma imagem com o JSF, sendo que a imagem esté em um diretório fora do projeto?
por exemplo:
c:imagens

obrigado

#2

Tá usando RichFaces?

#3

bom dia raf4ever
estou usando PrimeFaces

#4

achei esse link, mostrando como fazer com servlet

http://balusc.blogspot.com/2007/04/imageservlet.html#ImageServletServingFromAbsolutePath

#5

Não consegui…
o que estou fazendo de errado?
mew servlet está assim

[code]

@WebServlet("/ImageServlet")
public class ImageServlet extends HttpServlet
{
// Constants ----------------------------------------------------------------------------------

private static final int DEFAULT_BUFFER_SIZE = 10240; // 10KB.

// Properties ---------------------------------------------------------------------------------

private String imagePath;

// Actions ------------------------------------------------------------------------------------

public void init() throws ServletException {

    // Define base path somehow. You can define it as init-param of the servlet.
    this.imagePath = "C:/HRE-Commerce/imagens";

    // In a Windows environment with the Applicationserver running on the
    // c: volume, the above path is exactly the same as "c:\images".
    // In UNIX, it is just straightforward "/images".
    // If you have stored files in the WebContent of a WAR, for example in the
    // "/WEB-INF/images" folder, then you can retrieve the absolute path by:
    // this.imagePath = getServletContext().getRealPath("/WEB-INF/images");
}

protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
{
    // Get requested image by path info.
    String requestedImage = request.getPathInfo();

    // Check if file name is actually supplied to the request URI.
    if (requestedImage == null) {
        // Do your thing if the image is not supplied to the request URI.
        // Throw an exception, or send 404, or show default/warning image, or just ignore it.
        response.sendError(HttpServletResponse.SC_NOT_FOUND); // 404.
        return;
    }

    // Decode the file name (might contain spaces and on) and prepare file object.
    File image = new File(imagePath, URLDecoder.decode(requestedImage, "UTF-8"));

    // Check if file actually exists in filesystem.
    if (!image.exists()) {
        // Do your thing if the file appears to be non-existing.
        // Throw an exception, or send 404, or show default/warning image, or just ignore it.
        response.sendError(HttpServletResponse.SC_NOT_FOUND); // 404.
        return;
    }

    // Get content type by filename.
    String contentType = getServletContext().getMimeType(image.getName());

    // Check if file is actually an image (avoid download of other files by hackers!).
    // For all content types, see: http://www.w3schools.com/media/media_mimeref.asp
    if (contentType == null || !contentType.startsWith("image")) {
        // Do your thing if the file appears not being a real image.
        // Throw an exception, or send 404, or show default/warning image, or just ignore it.
        response.sendError(HttpServletResponse.SC_NOT_FOUND); // 404.
        return;
    }

    // Init servlet response.
    response.reset();
    response.setBufferSize(DEFAULT_BUFFER_SIZE);
    response.setContentType(contentType);
    response.setHeader("Content-Length", String.valueOf(image.length()));
    response.setHeader("Content-Disposition", "inline; filename=\"" + image.getName() + "\"");

    // Prepare streams.
    BufferedInputStream input = null;
    BufferedOutputStream output = null;

    try {
        // Open streams.
        input = new BufferedInputStream(new FileInputStream(image), DEFAULT_BUFFER_SIZE);
        output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);

        // Write file contents to response.
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        int length;
        while ((length = input.read(buffer)) > 0) {
            output.write(buffer, 0, length);
        }
    } finally {
        // Gently close streams.
        close(output);
        close(input);
    }
}

// Helpers (can be refactored to public utility class) ----------------------------------------

private static void close(Closeable resource) {
    if (resource != null) {
        try {
            resource.close();
        } catch (IOException e) {
            // Do your thing with the exception. Print it, log it or mail it.
            e.printStackTrace();
        }
    }
}

}[/code]

no web.xml adicionei;


<servlet>
	    <servlet-name>imageServlet</servlet-name>
	    <servlet-class>mypackage.ImageServlet</servlet-class>
	</servlet>
	<servlet-mapping>
	    <servlet-name>imageServlet</servlet-name>
	    <url-pattern>/image/*</url-pattern>
	</servlet-mapping>

e estou chamando assim:

					<h:graphicImage value="image/000086.jpg" />

o que está errado?

obrigado

#6

Cara, utilizando servlet então é a saída para a renderização de imagens fora do contexto da aplicação no jsf?

Andei pesquisando e encontrei muita gambiarra.
E normalmente gambiarra cedo ou tarde buga seu codigo fonte.

#7

E ai conseguiu resolver? Estou usando primefaces, mas busco direto do banco a imagem, sei que não é a melhor maneira, mas foi requisito.

#8

Então brother, ainda não resolvi mas estou olhando na api do rich
http://livedemo.exadel.com/richfaces-demo/richfaces/mediaOutput.jsf?c=mediaOutput&tab=usage

se vc está utilizando prime, com ctz tem algo parecido na api do prime

#9