Re: [appengine-java] Re: How to upload pics in appengine java
Hi Friends
i try to use the below code
but i got an error at
*PhotoServlet as*
*
*
*Photo photo = PhotoDao.getInstance().getById(Long.parseLong(id));*
The method getById(long) is undefined for the type
PhotoDao
can any body help for this?
--
ThanksRegards,
Nagarjuna Ch
Hyderabad,India
Mobile:+91-9949000658 |
Whoever is happy will make others happy too.
2010/3/15 rissen risse...@gmail.com
Step1:Defining a data class named Photo
public class Photo{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;
@Persistent
private Blob photo;
...
Set Get
...
}
Step2:Defining a DAO PhotoDAO.java
public class PhotoDao {
private static PhotoDao _instance = null;
public static PhotoDao getInstance() {
if (_instance == null) {
_instance = new PhotoDao();
}
return _instance;
}
//
public String insertPhoto(Photo photo) {
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.makePersistent(photo);
} finally {
pm.close();
}
return photo.getId().toString();
}
}
Step3:UploadServlet.java
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.IOUtils;
UploadServlet.java
...
...
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = null;
try {
iterator = upload.getItemIterator(req);
} catch (FileUploadException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
while (iterator.hasNext()) {
FileItemStream item = iterator.next();
InputStream stream = item.openStream();
if (item.isFormField()) {
// Handle form field
} else {
// Handle the uploaded file
Blob bImg = new
Blob(IOUtils.toByteArray(stream));
Photo photo = new Photo(bImg);
String pid =
PhotoDao.getInstance().insertPhoto(photo);
//resp.sendRedirect(admin?type=photooption=list);
}
}
...
...
Step4: Show the photo which you upload. PhotoSerlvet.java
public class PhotoServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
String id = req.getParameter(id);
...
Photo photo =
PhotoDao.getInstance().getById(Long.parseLong(id));
...
Blob b = photo.getPhoto();
resp.setContentType(image/jpeg;charset=utf-8);
resp.getOutputStream().write(b.getBytes());
resp.getOutputStream().close();
}
}
demo: http://mimaiji.appspot.com/photo?id=4001
On 3月14日, 下午1时12分, nag nagarjuna...@gmail.com wrote:
Hi
I am trying to build online reg form
can u help me how to upload image files to app engine.
First: is there any way to upload images in app engine?
thanks
Nag
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[appengine-java] Re: How to upload pics in appengine java
Also this guy Vince has a package that not only helps with uploads but also then allowing your app to generate pages that use the photos including delta checks - really neat stuff! See GAEVFS mentioned in this thread. Please post your results so the rest of us can benefit from your experience. http://groups.google.com/group/google-appengine-java/browse_thread/thread/a4ee0a7c54453586/b1f2984b43c920a1?hl=en#b1f2984b43c920a1 On Mar 14, 12:51 am, seleronm seler...@gmail.com wrote: Hi, I think that the following links are useful.http://stackoverflow.com/questions/1513603/ Please try. thanks. AFAIK almost any file can be apart of the docs that you upload (images, css, html, js, jsp, ico). I haven't had any trouble uploading images. Are you talking about accepting images from an input form? In that case you can store them as a blob type in the datastore. Hope this helps On Sun, Mar 14, 2010 at 12:12 AM, nag nagarjuna...@gmail.com wrote: Hi I am trying to build online reg form can u help me how to upload image files to app engine. First: is there any way to upload images in app engine? thanks Nag -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java% 2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- -Pav -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+ unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/google- appengine-java?hl=en. ---html-part included links--- mailto:nagarjuna...@gmail.com mailto:google-appengine-java@googlegroups.com mailto:google-appengine-java%2bunsubscr...@googlegroups.com http://groups.google.com/group/google-appengine-java?hl=en- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: How to upload pics in appengine java
a simple demo here: http://hapeblog.appspot.com/blog.shtml?id=2002 On Mon, Mar 15, 2010 at 11:17 AM, Diana Cruise diana.l.cru...@gmail.comwrote: Also this guy Vince has a package that not only helps with uploads but also then allowing your app to generate pages that use the photos including delta checks - really neat stuff! See GAEVFS mentioned in this thread. Please post your results so the rest of us can benefit from your experience. http://groups.google.com/group/google-appengine-java/browse_thread/thread/a4ee0a7c54453586/b1f2984b43c920a1?hl=en#b1f2984b43c920a1 On Mar 14, 12:51 am, seleronm seler...@gmail.com wrote: Hi, I think that the following links are useful. http://stackoverflow.com/questions/1513603/ Please try. thanks. AFAIK almost any file can be apart of the docs that you upload (images, css, html, js, jsp, ico). I haven't had any trouble uploading images. Are you talking about accepting images from an input form? In that case you can store them as a blob type in the datastore. Hope this helps On Sun, Mar 14, 2010 at 12:12 AM, nag nagarjuna...@gmail.com wrote: Hi I am trying to build online reg form can u help me how to upload image files to app engine. First: is there any way to upload images in app engine? thanks Nag -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com google-appengine-java% 2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- -Pav -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+ unsubscr...@googlegroups.com. For more options, visit this group athttp:// groups.google.com/group/google- appengine-java?hl=en. ---html-part included links--- mailto:nagarjuna...@gmail.com mailto:google-appengine-java@googlegroups.com mailto:google-appengine-java%2bunsubscr...@googlegroups.comgoogle-appengine-java%252bunsubscr...@googlegroups.com http://groups.google.com/group/google-appengine-java?hl=en- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- dream or truth -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
