Server
On the server side we develop our web applications in Java using Glassfish for our deployement server. You can have your standard Servlet class that catches your requests, but recently we bumped into Jersey. And I must say, I really love it. Here is for example the code to accept a file upload request.@Path("/file")
public class FileHandler {
@POST
@Path("/upload")
@Consumes("multipart/form-data")
@Produces("text/plain")
public String uploadFile(@FormParam("file") File file, @FormParam("file") FormDataContentDisposition fcdsFile) {
String fileLocation = "/files/" + fcdsFile.getFileName();
File destFile = new File(fileLocation);
// your code here to copy file to destFile
return "1";
}
}That's it. The
FormDataContentDisposition is a recent addition to Jersey which allows you to retrieve the name of the file that is being uploaded.Client
For the client side, I decided to make use of Uploadify. They basically provided a wrapper around SWFUpload using JQuery. Here is the code I used on the client side:<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>SimpleFileUpload</title>
<script type="text/javascript" src="js/swfobject.js"></script>
<script type="text/javascript" src="js/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="js/jquery.uploadify.v2.1.0.min.js"></script>
<link rel="stylesheet" href="css/uploadify.css" type="text/css" media="screen"/>
<script type="text/javascript">
$(function() {
$('#file_upload').uploadify({
'uploader' : 'swf/uploadify.swf',
'script' : 'rest/file/upload',
'fileDataName' : 'file',
'cancelImg' : 'img/cancel.png',
'multi' : true
});
});
</script>
</head>
<body>
<h1>Simple File Upload</h1>
<h3>Multiple file upload made easy</h3>
<div id="file_upload"></div>
<br/>
<input type="button" value="Clear Queue" onclick="$('#file_upload').uploadifyClearQueue();"/>
<input type="button" value="Submit Queue" onclick="$('#file_upload').uploadifyUpload();"/>
</body>
</html>
Voila, now you have a simple web application that is able to upload files to your server. You can download a sample application here.
32 comments:
Curious would this work with a multi-file upload with Uploadify?
Been looking for some easy-to-implement solutions.
Yes, if you take a look at the code for the client side, you can see that I already used "multi: true". Uploadify will call the method in the FileHandler for each file you upload.
I am having problems in using Uploadify to upload files larger than 100MB as per my requirement.
Can I use Jersey for that as I am currently using apache commons fileupload which breaks for large files. also I am not able to download jersey. is there no download access right now? Can I have the software downloaded from a different location? Any help is appreciated.
Hello Radhika. At the moment it is better to use FormDataParam instead of FormParam when parsing multipart data. And the jersey software should still be available from the same location: Jersey v1.4.
I think you are missing the web.xml sevlet definition...correct? I didn't see how the client will know what backend java app to call, so I added the servlet def to the web.xml and then the following error came back:
javax.servlet.ServletException: Servlet class: 'com.my.test.FileUploaderJersey' does not implement javax.servlet.Servlet
Maybe I am missing something, but would you know why I got that error based on the info I provided above. Note, in your client, you stated that 'rest/file/upload' is the script uploadify is to use. How do you tie that to the back end?
The FileHandler class is not a Servlet, it is actually just a class capable of handling REST calls. The actual endpoint is still a servlet of course, but this servlet is provided by Jersey. If you download my sample application (at the end of the post), you can find the web.xml. In there you will see that the ServletAdaptor is configured to listen to all calls to /rest/*. There is also an init parameter that specifies the package in which Jersey will look for classes that are annotated with @Path.
I tried the example you posted but it did not work. It does not trigger the annotated Java app, I have the web.xml same as your example. Basically, nothing happens on the backend. I commented out everything and just have a print statement to show that the uploadFile method was called, an I only get back "HTTP Error: 404" -- http://en.wikipedia.org/wiki/HTTP_404. I noticed in your example you did not have a button to select the files. Were you able to test this example?
By the way, the last post is by me. I did see you web.xml file, but still not able to get ti working.
- downloaded the sample project
- unzipped it
- opened the project with Netbeans 6.9.1
- resolved a reference problem to the jersey-bundle.jar using jersey-bundle-1.1.5.1.jar
- built the application
- deployed in glassfish: asadmin deploy dist/SimpleFileUpload.war
- pointed browser (firefox) to http://localhost:8080/SimpleFileUpload which showed the following page: screenshot
In other words, for me it worked. Maybe you deploy your the war in a different application server than glassfish?
I did it as your steps, and no error report, but nothing happen.it seems that the path 'rest/file/upload' do not work.
I just type some code like System.out.println("......called") in the method uploadNewFile(,), but when I run the code, submit, no strings in the console.
So... thanks in advance!
Yes I used WebLogic. I like the Jersey technology, but had to do it another way. You Blog was still a good one and thanks for sharing.
Beware: This example doesn't work well with multi-file uploads if you want to actually submit a form after the uploads are completed. Because Uploadify's uploadifyUpload() method is asynchronous, the form tends to submit before the uploads complete.
More importantly, with Jersey 1.5 there's a new method for handling uploads that lets you accept a stream directly. Here's an example handler class, though it'll be nigh-unreadable because of the horrid comment formatting in Blogger, so I'll reproduce it and some more info here:
http://soapyfrogs.blogspot.com/2011/02/handling-file-uploads-with-java-ee-6.html
@Path("/file")
public class FileHandler {
@POST
@Path("/upload")
@Consumes("multipart/form-data")
@Produces("text/plain")
public String uploadFile(
@FormDataParam("file") InputStream file,
@FormDataParam("file") FormDataContentDisposition fileInfo) {
// your code here to copy file to destFile
System.err.println("Received file: " + fileInfo.getFileName() + " as " + file);
return "1";
}
}
Is possible to use JSF context (FacesContext) in Jersey context ? i have tried, but is null. Any idea ? Because i must get a bean from JSF context
"Anonymous": AFAIK, JAX-RS/Jersey doesn't offer any direct access to the JSF context. However, if you're using CDI/Weld then JAX-RS beans share the same session scope, etc, and you can inject JSF beans into a JAX-RS resource class easily.
Alternately, you could store your bean references as session properties on the HttpSession, which you can access via the HttpServletRequest in both JAX-RS and in JSF. In JSF, get it via FacesContext.getExternalContext().In JAX-RS, add a new method parameter to your REST methods: "@Context HttpServletRequest request".
Gee, wouldn't it be nice to have some interface consistency in the Java world! CDI is helping a bit, and Seam Solder should make some more difference once it's stable and supported on all application servers, but for now we get to learn different ways to do different things in different parts of the Java EE stack.
Hi, Great.. Tutorial is just awesome..It is really helpful for a newbie like me.
I am a regular follower of your blog. Really very informative post you shared here. Kindly keep blogging.
If anyone wants to become a Java developer learn from Java EE Online Training from India.
or learn thru Java EE Online Training from India .
Nowadays Java has tons of job opportunities on various vertical industry.
Thank you for benefiting from time to focus on this kind of, I feel firmly about it and also really like comprehending far more with this particular subject matter. In case doable, when you get know-how, is it possible to thoughts modernizing your site together with far more details? It’s extremely useful to me.
Data Science Training in Indira nagar
Data Science Training in btm layout
Data Science Training in Kalyan nagar
Data Science training in Indira nagar
Data Science Training in Marathahalli
Data science training in bangalore
Nice Article… I love to read your articles because your writing style is too good, its is very very helpful for all of us and I never get bored while reading your article because, they are becomes a more and more interesting from the starting lines until the end.
Check out : big data training in velachery
big data hadoop training cost in chennai
big data training in chennai omr
big data training in chennai velachery
Really useful information. Thank you so much for sharing.It will help everyone.Keep Post. RPA training in chennai | RPA training in Chennai with placement | UiPath training in Chennai | UiPath certification in Chennai with cost
Really Happy to say your post is very interesting. Keep sharing your information regularly for my future reference. Thanks Again.
Check Out:
big data training in chennai chennai tamil nadu
big data training in velachery
big data hadoop training in velachery
Good job and thanks for sharing such a good blog You’re doing a great job. Keep it up !!
PMP Certification Fees | Best PMP Training in Chennai |
pmp certification cost in chennai | PMP Certification Training Institutes in Velachery |
pmp certification courses and books | PMP Certification requirements |
PMP Training Centers in Chennai | PMP Certification Requirements | PMP Interview Questions and Answers
Thanks for sharing info about Java.
Learn Digital Academy offers, Digital marketing courses in Bangalore.
In-class training program, practically on Live Projects.
Nice post! I love this blog and I got more kinds of techniques in this topic. Thanks for your sharing.
Primavera Training in Chennai
Primavera Course in Chennai
Pega Training in Chennai
Unix Training in Chennai
Tableau Training in Chennai
Power BI Training in Chennai
Excel Training in Chennai
Oracle Training in Chennai
Social Media Marketing Courses in Chennai
A good blog for the people who really needs information about this.
Good work keep it up.
TOEFL Coaching in Chennai
TOEFL Classes in Chennai
German Language Classes in Chennai
IELTS Training in Chennai
Japanese Language Course in Chennai
spanish language course in chennai
TOEFL Coaching in Porur
TOEFL Coaching in Adyar
Thanks for sharing such a Wonderful blog. This is such a exact information i am been searching for. Keep post
Check Out:
react js tutorial
it courses in chennai
react js classes near me
Thanks for sharing such a Wonderful blog. This is such a exact information i am been searching for. Keep post
Check Out:
Selenium course fees in chennai
Best Selenium training in chennai
Selenium training courses in chennai
Get the most advanced AWS Course by Professional expert. Just attend a FREE Demo session.
For further details call us @ 9884412301 | 9600112302
AWS training in chennai | AWS training in velachery
For Data Science training in Bangalore, Visit:
Data Science training in Bangalore
For Data Science training in Bangalore, Visit:
Data Science training in Bangalore
Nice information, want to know about Selenium Training In Chennai
Selenium Training In Chennai
Data Science Training In Chennai
Protractor Training in Chennai
jmeter training in chennai
Rpa Training Chennai
Rpa Course Chennai
Selenium Training institute In Chennai
Python Training In Chennai
Rpa Training in Chennai
Rpa Course in Chennai
Blue prism training in Chennai
Data Science Training In Chennai
Data Science Course In Chennai
Data Science Course In Chennai
Nice infromation
Selenium Training In Chennai
Selenium course in chennai
Selenium Training
Selenium Training institute In Chennai
Best Selenium Training in chennai
Selenium Training In Chennai
Rpa Training in Chennai
Rpa Course in Chennai
Rpa training institute in Chennai
Best Rpa Course in Chennai
uipath Training in Chennai
Blue prism training in Chennai
Data Science Training In Chennai
Data Science Course In Chennai
Data Science Training institute In Chennai
Best Data Science Training In Chennai
Python Training In Chennai
Python course In Chennai
Protractor Training in Chennai
jmeter training in chennai
Loadrunner training in chennai
Post a Comment