I am working on a project named as LMS (Learning management system) and the modules allocated to me are:-
The uploaded course content saved as ppt,doc ,pdf or audio/video file should be opened in the same window.The application by which file needs to be opened should be embedded in the context window itself.
The uploaded course content saved as ppt,doc ,pdf file can be converted to audio/video file.
I have to code them in JSP.
Being new to java i am not getting how to do these. Can you plz plz help me out by showing me some direction? I shall be very thankful to you.
I will be waiting for your reply desperately.
Thanks and regards
swati
First I have to ask do you already have a transformation server/code to do the conversion in point nbr2 or do you ask for guidance on that to? If that's the case maybe you can look into HTML5 for this otherwise use something like flash.
I would say use HTML5 for video and the other things I would require the users to install the correct plug in adobe reader ... I think it's reasonable to put requirements on the user when using an enterprise app.
Almost all of this could be done in HTML JavaScript inside your jsp.
Related
I'm working on a web project and I am required to write some functionality that will
allow a user to upload images/videos, then display them. The problem is that when I start doing some research for how to accomplish that task, I hear a lot of people saying that I should not
save the images in my database, but rather to an external server then just upload the file path
in the form of a string to the database.
Now this concept is completely new to me so I don't even know where to look or how to start. I am
programming in Java and I am using springboot, and hibernate. Could someone please point me in the
correct direction, as I have been googling for hours and I have found nothing that shows me how to
accomplish this.
Thank you very much.
I was wondering how Java applets work in regards to accessing data on a users PC. For example I wish to grab a file on their PC and send it to the web server hosting my webpage (basically a simple file transfer client program). Can this be done using something like a JFileChooser dialog?
Yes, this can be done. You can always try and check it with minimal code (quick and dirty). This, this and this might help.
I'm working on a FLEX which enables the user navigate through a list of images at the server (BalzeDS tomcat 4.0.0.14931). The images stored under the "WebContent/Images", and the already available/ saved images are displayed as desired.
From this app user would be able to select a file from their local directory and upload it. I have done the necessary coding related with uploading the image and it successfully creates a copy at the desired folder at the server. Once the image file is uploaded I'm trying to display the it at the FLEX end, but the image is not displayed. When check at the target folder at the server end, the file has been created successfully.
In order to make the uploaded image visible, the BlazeDS Tomcat server has to be restarted. Since this is not desired way to go ahead, I am seeking some help from you experts out there to resolved this.
I tried searching the net get this issue sorted out, but unable to come cross any solution. An identical issue was posted on another forum (Tomcat restart problem), that also still not resolved.
I this is best approach to achieve this JAVA/ BlazeDS/ TomCat/ FLEX environment or is there a better alternative. The other alternative I could achieve this is through persisting the file into the database as byte[], but I did not want accomplish in that manner since size of the database tend to shoot up.
I would really appreciate if you could help me out on this.
Thanks in advance.
If you have to restart Tomcat, that means you are storing user data in your web-apps directory. You should not be storing any user data in the webapps folder. These are considered "system files" and should not be publicly editable under any circumstance.
Store any user data in a publicly accessible folder with the correct permissions and serve them over HTTP (you should be able to view it in a web browser).
just looking for a point in the correct direction..
So I've developed a little application on the back end of our websites that allows the girls in our office to send out letter-headed PDF quotations to our potential clients via email.
I've done this using a simple HTML form, the FPDF class, and the php function mail()
It works a treat, but I'd like to take it a step further and create a desktop application so that the girls don't have to go through the login section of the website to access this functionality.
I'm thinking Java?
Would this be a difficult mission someone who has only had web-developing experience?
It would only be the smallest/simplest of applications.
Thanks for any input :)
This is just an advice.
Since you have already developed something that works over web, reuse it.
Convert the PDF converter into a service to upload and retrieve file. This service should return a token_id that can be used later to download the converted files.
Write a Java app using Swing that merely uses this web service. The logic in this application should be (a) browse file from computer, (b) Use web-service upload URL to upload the file and rec/eive appropriate response like upload_token_id and status uploaded/converted/failed, (c) the Java app, should be able to use this token to download the converted file.
You may need to look into this for help related to uploading the file
No it wouldn't be difficult job to mimic your app to java desktop app that can be Java Swing APP. you just need some practice on swing. As you are doing in php that is creating PDF and mailing it. This task can easily be done in java swing by using Java Mail API for emailing and IText for pdf generation.
For reference you can read following links:
http://www.javabeginner.com/java-swing/java-swing-tutorial
http://zetcode.com/tutorials/javaswingtutorial/
http://www.apl.jhu.edu/~hall/java/Swing-Tutorial/
http://www.oracle.com/technetwork/java/javamail/index.html
http://java.sun.com/products/javamail/javadocs/index.html
http://www.javacommerce.com/displaypage.jsp?name=javamail.sql&id=18274
http://viralpatel.net/blogs/2009/04/generate-pdf-file-in-java-using-itext-jar.html
Hope this helps.
I'm trying to find something that will let users upload multiple files to a website. The requirements are that it let them easily select multiple files (preferably with something like check boxes) and that it displays a preview of the images they select.
I'd prefer to only use Javascript or Flash if possible, but Java is also an option (this needs to work on platforms where Silverlight isn't available).
So far all I've been able to find are things that use the native file selector (which doesn't show previews on Windows, and makes it unclear that you can select multiple by holding ctrl).
I'm not sure if the preview requirement is even possible, but it's the most important.
This is a firefox solution:
It uses the FileReader javascript object to load, display and upload images.
http://hacks.mozilla.org/2011/01/how-to-develop-a-html5-image-uploader/
It still doesnt show previews in the FileSelection dialog but at least allows you to preview the images before uploading.
And here is a ready made java applet solution:
http://jumploader.com/doc_overview.html
To upload multiple files I use RichFaces rich:fileUpload component.
Concerning the preview, I've got the similar problem and the best I found after couple of days of googling is following.
Alfresco has the same problem and resolved it with :
An open office which runs in server mode (socket) and all the office documents are sent by alfresco to open office in order to convert them in PDF
Those PDF are converted to .swf viewer thanks to SWFTOOLS
This .swf is integrated in the HTML
For images, it uses ImageMagick to create small version of the file I suppose
Personnaly, I will try to implement it this way :
Converting office documents to PDF thanks to open office in socket mode
Transform the first page of the PDF into a PNG thanks to JPedal library
Diplay that PNG to the end user
For images I would perhaps use ImageMagick too ... but for now, I'm using Seam Image.scaleToFit API
I am assuming 2 things here:
1) Some kind of client/enduser will be doing the file upload
2) You get some kind of say on what the client installs on their computer to help make this happen.
If this is the case, my first suggestion would be:
Give them FTP or SFTP client software to upload files. The php page you make can have a link to Filezilla, along with instructions on how to use it. ftp and sftp are THE protocols to use for transferring files. HTTP is just not designed(well) for it, nor are browsers.
Once the user has the (S)FTP client software installed, you can give them URL's to upload files to that are specific to their user account, and you can have a backend script process and load/move files that they upload. It's pretty easy to create a local temporary directory using a server side script, have the client upload files via ftp, then go back to the web browser and click a button that says "Done uploading, please process my stuff".
The browser can even give back confirmations on everything that gets uploaded/processed.