Regarding image in jsp

hi all,
iam trying to display an image in a JSP page.I have written the query in a servlet and calling that servlet in the img src attribute.But the image is not been displayed.Below is the code i have written.Can anyone tell me where did i go wrong .Thanx in advance.
This is the HTML page.
<html>
<body>
<form>
<img src='DisplayImage' height='400' width='400'/>
</form>
</body>
</html>This is the servlet
public class DisplayImage extends HttpServlet
     public void service(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
          try
               Class.forName("org.gjt.mm.mysql.Driver");
               Connection con=DriverManager.getConnection("jdbc:mysql://localhost/test","root","");
               Statement st=con.createStatement();
               ResultSet rs=st.executeQuery("select image from imagetable");
               Blob blob;
               byte[] imgbytes;
               if(rs.next())
                    imgbytes=rs.getBytes("image");
                    BufferedOutputStream output = null;
                    ByteArrayInputStream input = new ByteArrayInputStream(imgbytes);
                    int contentLength = input.available();
                    output = new BufferedOutputStream(response.getOutputStream());
                    while (contentLength-- > 0)
                         output.write(input.read());
                    output.flush();
          catch(Exception e)
}

Not enough information :)
Possible reasons include (but aren't limited to):
1) your failure to set the correct content type for the output stream
2) not writing the image data to the output stream correctly (or at all)
3) writing data that's not image data
4) having the wrong URI for the servlet

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General Question Regarding Image Processing

Hi All,
I need a suggestion regarding image processing and this is the best place to get best advise.
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requirements are as described below:
we have a e commerce based application where we need to display product images which we are currently displaying successfully.
now we have to provide user with image processing functionality like user can zoom image can flip image can rotate image.
what we want like when user click on zoom we can generate a dynamic image of that region based on a single source of image and can provide zooming functionality.
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can any one point me to any open source java based library so that we can use that to provide solution or do we need some other approach.
Here is a link for a image zooming example hough this is highly professional solution using Adobe Scene7 but we want to implement something like in image zooming
[Zoom Demo|http://s7d2.scene7.com/s7ondemand/zoom/flasht_zoom.jsp?company=S7Web&sku=AnthroISwebDemo&config=S7Web/AnthroISwebDemo&zoomwidth=500&zoomheight=500&viewer=/skins/S7Web/SWFs/loaders/genericzoomLfour.swf&vc=codeRoot%3D%2Fis-viewers351%2Fflash%2F]
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It is never safe to assume that any allocation was successful, and while it's incredibly unlikely that you're running into any such situation, it's entirely possible for a formal protocol to declare that a given message send should return immediately without waiting around:
http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ch apter13_section_8.html#//appleref/doc/uid/TP30001163-CH9-BAJIGHAF
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Best way to manage images on jsp web application

Hi,
Am developing a jsp web application, in that project, the user will upload the image files, now I created an image directory in the context root and when the image is uploaded by the user it is saved in the /images directory and the image path is saved in the database. I can display this image using the <img src="images/a.jsp" > tag.
but when I rebuild the project all the images in the /images directory get deleated but the image path is remained in the database, is there any method that I make /image dir outside my project context root so that when I rebuild the project the /images dir can get changed and my project will save images outside the context root that is in the /images dir which is now outside the project context root. and is it possible to display those images using <img src""> tag. because this time my /images dir is at D:/images . what could be the best method or way to handle images with the web application.
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Well my friend as per your given case there are to two ways of approaching your problem.
Case 1:
How to save the relevant data ??
.Create a backup folder Workstation on which you are hosting your application where you can store all the uploaded files which is outside the scope of webserver(However we can write a dedicated servlet which can access that file) and make sure we pickup from any the folder path from a specfic MessageResource bundle or an context/servlet init parameter in web.xml.
.Write a Upload servlet/Backing Bean which saves all the files in the discussed folder using utility packages like Commons FileUpload,Oreilly MultipartRequest & etc and then register saved fileName in the database user specfic table specific to user.
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.Write a dedicated servlet which can pickup user related fileName specfic information from the database and the read the file from backup folder by constructing the path from the entry made as a init param in web.xml or any other custom MessageResource bundle and then stream the Image data using the ServletOutputStream.
NOTE: do not forget to pickup & setImage file ContentType & Set the content length.
.Just try to render the JSP view file where we are displaying the displaying the images by calling the dedicated ImageServlet.
<img src="ImageServlet?userid=2345" align="center"/>Try to refer below posts to get a better understading.
Dedicated Image Servlet:
http://forum.java.sun.com/thread.jspa?threadID=5208858&messageID=9840042#9840042
Uploading Files Using Servlet:
http://muimi.com/j/jakarta/commons/fileupload/
Case 2
The second method would more or less the same but here we would save the uploaded file
content is saved in the Database as a Blob and we would retrive it back using a dedicated image servlet again.
However,in terms of performance the second case implementation is very costly.
Try to refer below posts to get a better understading on the second case.
http://forum.java.sun.com/thread.jspa?threadID=5193481&tstart=50
http://forum.java.sun.com/thread.jspa?threadID=5211649&messageID=9853670#9853670
Hope this might help :)
REGARDS,
RaHuL

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Hello, this is a brief code of a simple web service I coded sometime ago, and tested using asp & jsp.
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Any body please help me.......
what I'm missing..............
Is there any other way to display an image on JSP page using backing bean
method.
Thanks
Ans

HI,
See: http://kuba.zilp.pl/?id=241
Kuba

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Regarding image in jsp

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