Jsf sample projects with source code
FacesContext contains all of the per-request state information related to the processing of a single JavaServer Faces request, and the rendering of the corresponding response. It is passed to, and potentially modified by, each phase of the request processing lifecycle. A FacesContext instance is associated with a particular request at the beginning of request processing, by a call to the getFacesContext method of the FacesContextFactory instance associated with the current web application.
The instance remains active until its release method is called, after which no further references to this instance are allowed. While a FacesContext instance is active, it must not be referenced from any thread other than the one upon which the servlet container executing this web application utilizes for the processing of this request.
The Facescontext is the anchor point for connecting to framework-and container- specific services. For example, you can obtain the underlying httprequest and context objects for the page request that's accessing your backing bean by going through the Facescontext. That includes the security context a web page request is running under. The general philosophy behind JSF is that the user-provided components should be abstract enough not to depend on such details as to whether they're running in a traditional JSP environment or something more exotic, so if there's a Facescontext reference in the bean, it's a potential sign of bad design, especially since beans are expected to have things injected into them, not go out looking for stuff.
However, sometimes for one reason or another, it's convenient to reach out of the backing bean and obtain the outlying information, so it's there if you need it. Reference: What is the use of Facescontext Context Object. Quote from chapter 6.
JSF defines the javax. FacesContext abstract base class for representing all of the contextual information associated with processing an incoming request, and creating the corresponding response. A FacesContext instance is created by the JSF implementation, prior to beginning the request processing lifecycle, by a call to the getFacesContext method of FacesContextFactoryas described in Section 6. When the request processing lifecycle has been completed, the JSF implementation will call the release method, which gives JSF implementations the opportunity to release any acquired resources, as well as to pool and recycle FacesContext instances rather than creating new ones for each request.
It is specified in class javax. FacesContext and in Mojarra implemented in class com. FacesContextImpl and in MyFaces implemented in class org. What is FacesContext used for? And where exactly is it implemented?It actually has a strong ASP. The attached is a Maven project. I have tested it with Maven 3.
It actually has two examples. If you are not familiar with how to import Maven projects into Eclipse, you can check out this link. When I tried to import the project, I noticed that Eclipse showed me some error message telling me some validation errors. You can simply ignore these messages and delete the markers from Eclipse. The manage bean of the simple example is implemented in the "SimpleCrudBean" class.
If you now load the "simplecrud. But if you click the refresh button on the browser after adding a student, you will see this ugly popup message. If you click the "Continue" button and proceed with the refresh, you will notice that the student just added gets added again. This is definitely not a good behavior. In the next example, we will try to resolve this issue. The "redirectWithGet" method is to simply send a redirect request to the browser to refresh the browser with a GET request.
The "freshsafecrud. Of course the cost is a round trip to the web server.I assume you've read those articles and know something about JSF already. Do this only if you think you don't know anything about JSF.
In the end, a book written by a real author is best, right? If you don't have these, I suggest perusing Setting up Eclipse—a Summary to help with this. Paradigmatically, and with concrete examples in this tutorial and project, these are:. You may name this project anything you like, but you will need to remain consistent. For the Configurationchoose JavaServer Faces v1.
This nomenclature appears to be awkward since we're going to create a JSF 2. Indigo is about to come out; we'll see if WTP changes anything in that release. Don't sweat it if one or more of these is missing. We'll create these libraries in the next step. But, leaving them in won't hurt anything either. At this point, you probably don't have any of the libraries listed in the previous step.
Please go to Appendix: Setting up User Libraries now to set them up. When done, you should see what's below although you may have chosen to name your libraries differently—this is alright as long as the JARs inside are correct.
You'll find the definitive list and also links to download areas there. We'll need a backing bean for our JSF work; this will be written in Java.
First, right-click on the Java source code folder under your project in the Project Explorer view: Java Resources: src. Click New and create the Java package we'll use, jsf.
Create the backing bean.
We're going to implement the very old "Guess a number" application. For this, we'll need a Java file under the new package. We'll call it UserNumberBean. We're going to use the latest annotations ManagedBean and SessionScoped. We'll explain what this means later.
In the meantime, be sure to include the annotations. Also, in order to do this, obviously, you'll have to have your Java compiler compliance level set at least to 1. Most web applications have some resources. In our case, this is only an image, but it could also be various property files or bundles that we'd use for localization. Here is the image you'll need to copy and drop on this path. Right-click here and save this image to your project.
Duke is the host of our guess-a-number game. When you've set this up, you'll see the following in your project. You've already got a compiling bean and this image as a resource.
List of Free code JSF
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In this tutorial, JSF is used to create a simple login page where user will be authenticated based on database values. In this example we have a login page. On Login button click, the username and password will be validated against DB values, if succeed then directed to success page otherwise ask to retry. Once this is done, select the target runtime environment as Apache Tomcat v6.
This is to run the project inside Eclipse environment. In configuration select JavaServer Faces v1. Copy all the required jar files shown bellow to the lib folder of the project directory and add all jar files to the build path of the project. Create three JSP files: login. The login. After successful login user will be redirected to welcome. In the case of authentication failure user will be redirected to failure.
From JSF 2. Create a java class LoginBean inside "com. Note :- In JSF 1.
JSP Projects - Download Project Source Code and Database
We declare this beans using annotation. Jsf looks for faces-config. Here we have defined managed bean the backing beanand navigation rule. Open faces-config. In this step we will configure JSF via the web. Right Click on the login.
If you move the service call from the getter method to a PostConstruct method and use either RequestScoped or ViewScoped instead of SessionScopedit will look better. It's okay.
Database Application using JSF (Login Application)
As long as you're consistent with it and the code is readable in a sensible way. Also, a "UserListService" sounds like it can only deal with lists of users instead of users in general. I'd rather use "UserService" so you can also use it for creating, updating and deleting users. It isn't exactly a DAO. Previously, when JPA didn't exist, everyone homegrew DAO interfaces so that the service methods can keep using them even when the underlying implementation "plain old" JDBC, or "good old" Hibernate, etc changes.
The real task of a service method is transparently managing transactions. This isn't the responsibility of the DAO. And the controller feels like it's doing some of the job of the service.
I can imagine that it does that in this relatively simple setup. However, the controller is in fact part of the frontend not the backend.
I'm trying to get used to how JSF works with regards to accessing data coming from a spring background. Is this the correct way of doing things?
Is my terminology right? The "service" feels more like a DAO? It is a dao, well actually a repository but don;t worry about that difference too much, as it is accessing the database using the persistence context. You should create a service class, that wraps that method and is where the transactions are invoked. Sometimes the service classes feel unnecessary, but when you have a service method that calls many dao methods, their use is more warranted. I normally end up just creating the service, even if it does feel unnecessary, to ensure the patterns stay the same and the dao is never injected directly.
When is it necessary or convenient to use Spring or EJB3 or all of them together? See also: Creating master-detail pages for entities, how to link them and which bean scope to choose Passing a JSF2 managed pojo bean into EJB or putting what is required into a transfer object Filter do not initialize EntityManager javax.
TransactionRequiredException in small facelet application. This adds an extra layer of abstraction making future refactoring more flexible. Data access object DAO in Java.This is a "login" application, which asks an user for an ID and password, verifies the information, and forwards the user to a success or error page. The application will use a few JSP pages with JSF elements, and a session-scoped managed bean to coordinate their interactions.
We don't assume that a J2EE server-specific plugin, such as the Sysdeo Tomcat plugin has been installed. Here we create an Eclipse project, and set up folders for a web application. The folder structure created is simply one that works for this author; your mileage may vary. The New Project wizard appears. Select Java Project ; click Next. This folder will contain all "functional" pages. Here we create a class called LoginManager which will be used as a backing bean for the login process.
We then configure it to be a managed bean. Here we create the JSP pages that make up the application's user interface. We will have 4 pages: a start page index. All pages except login.
Then we create login. Please try again. Note: the JSP editor is aware of referenced tag libraries, and uses them for code completion as well. We're done with setting up navigation rules. We'll set some properties in web. Here we edit web. As it turns out, since we have such a trivial application, all we need do in web. The application is now complete, and you should be able to deploy it to your server of choice. Once deployed browse to index.