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I am trying to build a web application for a data management system. I have a year's experience in Java, basic knowledge of SQL, and very little knowledge of anything else.
I have done a lot of reading online and there seems to be endless different ways you can go about building a web app. My question is what is the easiest way for somebody with my sort of experience, and what else do I need to learn. I have been using Eclipse IDE however have now downloaded Netbeans as I am unsure which IDE would be best either.
I am currently reading up on Servlet's, JSP's and HTML and am just trying to understand what I need to learn and use to get started really as I need to have the web app ready in 8 weeks!
I have also read about GlassFish, Ajax, TomCat, Apache etc. but do not really understand how they fit in or which to use.
you can try some of the following approaches:
Download Apache Tomcat. Try to start it up. See if you can understand anything from its sample applications.
For Java webapp, the minimum technologies you need to know are: Servlets, JSP. If you need database access you also need to know about JDBC.
Try to google for CRUD applications (i.e. Create, Read, Update, Delete applications) that use only Servlets and JSP.
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I recently wrote a very simple apk app for a client - that runs nicely on their Android devices. They have since asked for it to be a runnable in web browser app (preferably phone and desktop). What would the best idea for this be?
As it's already in Java- perhaps a web applet? Are there any considerations here?
Or is there anything else that I can use? I've also heard to stay away from emulating the app within a web browser as it can be slow...
Sorry for asking a "unorthodox" question, but I know that SO people normally have a few suggestions that can put me on the right path...
What would the best idea for this be?
Tell the client to go pound sand.
Or, rewrite the entire app in a hybrid app framework, such as Apache Cordova/PhoneGap, so your mobile and Web implementations are similar.
Or, rework your Android app to be a (small) pure-Java JAR of business logic, wrapped in an Android app. Then, implement a server-side Java Web app (e.g., WAR) that leverages that same JAR.
perhaps a web applet?
Not all browsers support those, including roughly 0% of mobile browsers.
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I'm planning to write a simple program that displays course prerequisites for students at my university in graph form (ie as a network of vertices and edges). I'd like to embed the program in a webpage to save people the hassle of downloading an executable.
Currently I'm looking at making my program a Java applet (Java also would give me access to the handy Swing library), but I don't like the fact that applets can't be viewed on most mobile devices.
What alternatives to applets exist for a project like this? I'd like to make it compatible with as many devices as possible, and also not have to build the graphics stuff from scratch.
One final consideration is I'm doing this mostly as a learning exercise. Ideally the tools I'd be working with would be helpful to know in the future.
Please don't use applets. They have been sufficiently deprecated.
The best way to do this is by using html/js/css. A lot of useful libraries exist that can help you with this task. jQuery seems obvious, but there's also d3.js or vis.js for displaying visual representations of data, and bootstrap for responsiveness (mobile friendliness).
You may use Angularjs with angular-chart for Showing graph in Web Browser.
If your graph data is dynamic you might use Nodejs and mongoDB for backend.
angular-chart is responsive and its easy to show dynamic graph. But as it uses HTML5 canvas some mobile browsers might not show its transitions smoothly depending on the device.
I personally do not prefer using applet in web browser when the same functionality can be achieved using great frameworks like Angularjs.
why dont you try to build your project through Servlet framework
by the way cgi were removed by servlet because of the handling of the request
applet uses the same concept
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What are the open source java based frameworks that can be used to build a dynamic websites?
The dynamic website should allow users to change content in the site. I am not looking for a portal solution, but something lightweight and customizable.
I would recommend Play! Framework. I have worked with it before and it is pretty easy to learn. Extensive tutorials and documentation are on their website.
Because of Play's extensibility, there are many modules for it, one of which is a lightweight CMS module. I have not used this module, but it sounds like what you might be looking for.
Search about Spring MVC or JSF.
Really every Java web framework can be used to create dynamic sites. That's pretty much the entire point of using Java and such frameworks.
If you only needed to serve static content just Apache would be all you need,
There is a bewildering choice of web frameworks in Java. Everyone will tell you theirs is best and all others are bad.
My 2 cents; JSF is one of the most popular choices, rather easy and has lots of support and resources available for it. It's already part of the standard Java EE library, so in most cases you don't have to download or install anything to get started. Any Java EE implementation (JBoss, Glassfish, Resin, Geronimo, etc etc) will do. The only exception is Tomcat.
While there are other choices that also work, it's hard to go wrong with JSF.
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I am planning to develop a web application using GWT, but before that I need to make few clarifications. The web app what I am developing should be compatible with Mobile phone browsers considerable smart phone browsers.
I googled a lot to know this but I did not find supporting or sufficient documentations.
If GWT doesnt support what would be the other framework, which is open source java based framework?
There is no big problem with mobile websites build using GWT, it generates standard javascript + html. There is some libraries that can help you build mobile site, like http://code.google.com/p/gwt-mobile-webkit/. And you can write any widget you wish.
But keep in mind that GWT will generate very heavy target files, sometimes few megabytes long. So if you target audience uses GPRS for accessing your site, it could be problematic for them.
There is also other web-framework, that are GWT based: http://vaadin.com/home.
It have great collection of UI components, and currently authors are extending it to be more mobile friendly.
You could also try a different route with Context Framework. I think it suites better to mobile web developing because it is more lightweight solution. I have made a journey planner (in Finnish) with it and it was tailored especially to touch screen phones. You can find it here.
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My requirement is to access moodle as a backend engine and front end will be mint in Java[jsf]
now I want to know that is there any interface available to access Moodle from Java , using WebServices or any APIs or anything.
Initially I tried using Sakai which is in Java, but the problem is there is no clear API written for it.
So let me know the option for using Moodle from JAVA.
Also if it is possible than what will be the feature available through the WebServices or API. ?
Or any other LMS that is in Java and provide API or WebService to make this working.
I reviewed many LMS (dokeos, docebo, ATutor) last year and to be frank all of them sucked. Moodle was the most stable, had more plugins and a huge community.
I came across Project Sakai, I havn't tried it, but sounds promising. Something very interesting from Google is cloudcourse (in python I guess, but looks awesome demo). But not a complete LMS (compared to moodle).
You forgot to add Chamilo they have a list of available web services (SOAP) that you can use to create courses, users, add users to courses, etc
https://www.olat.org/ and https://www.openolat.com seem a good alternative to moodle.