How can I display image that are contained as bytes in my action

   <img src="myWebAppContext/myAction!default.action />

<xwork>
    ...

    <action name="myAction" class="...">
        <result name="myImageResult" type="stream">
            <param name="contentType">${myContentType}</param>
            <param name="contentDisposition">${myContentDisposition}</param>
            <param name="contentLength">${myContentLength}</param>
            <param name="bufferSize">${myBufferSize}</param>
        <result>
    </action>

    ...
</xwork>

public class MyAction extends ActionSupport {
   public String doDefault() {
        return "myImageResult";
    }
   public byte[] getMyImageInBytes() { .... }

   public String getMyContentType() { ... }
   public String getMyContentDisposition() { ... }
   public int getMyContentLength() { .... }
   public int getMyBufferSize() { ... }
}