This will pull up the DataList demo code for PrimeFaces. Figure 2 shows the output of a simple data table, which is taken from the PrimeFaces DataList demo. Listing 3 presents the markup for this dataList display. If you scroll to the bottom of the PrimeFaces showcase, you can see the markup in the dataList. In Listing 3, notice the value property of the dataList component. You can see that this references a dataListView object, and accesses the.
The component is going to use the model object returned by that field. JSF tokens use conventional accessors to reference object properties, so. This tells the dataList component what variable to use when it iterates over the list of cars returned by the value field. These properties are specific to the dataList component, but the value property is very common. The var attribute is also conventional for components that iterate over lists.
Each iteration of the dataListView. In this case, the header is defined as Basic. You can see how the Facelets XML will drive this output by combining the data with the markup. Now let's look at the Java code behind it.
First, notice that the DataListView class is annotated with Named , which you can see from the import import javax. Named; is part of JSF. The Named annotation tells JSF this bean is part of the app. This is another JSF feature that allows beans to be "wired together," a technique popularized by the Spring framework and other dependency injection tools. In essence, JSF will find the carService object in scope and associate it automatically to the service field on the DataListView object.
Overview JSF is based on the following configuration files:. Installation 3. Review the generated project Review the web. Domain Model Create a package "de. Define managed bean Double-click on faces-config. Run your webapplication Select Convertor. Layout via css JFP applications can get styled via css files. Your second JSF application This second JSF application will add validation, resource bundles and navigation as additional functionality.
Domain model Create a new package de. Please note that we are hard-coding that only user tester with password tester can login.
The class Card contains currently some controller code. The next chapter will demonstrate how to keep your model code clean and how to use controllers directly. Register your managed beans Double-click on faces-config. Validators JSP allows to define validators which allows to check certain values which are placed in the UI. FacesMessage ; import javax. UIComponent ; import javax. FacesContext ; import javax. Validator ; import javax.
Select Validators and press Add. Navigation Rule Select your faces-config. Select Page and click in the workarea. Add LoginView and Trainer to the workspace. The user bean return the String success. In the navigation rule you now defined that if we receive "success" then we should be going to the next page.
Run your webapplication To run your webapplication, select LoginView. Remember that we are hard-coding that only user "tester" with password "tester" can login. Try another user this should not work. You should be able to login with the right user and move to the next page. JSF application with a controller We will now extend the example from the previous chapter to a math trainer. In general it is considered as a good design practice to keep the model independently from the application logic.
This example will also demonstrate the usage of dependency injection in JSF. Controller Create the following class CardController. UIPanel ; import javax.
FacesContext ; import de. Register your managed beans- Dependency injection Double-click on faces-config. Resource bundle for messages Create the following file "messages. Run your webapplication To run your webapplication, select Trainer.
Controller Create the package de. ArrayList ; import java. List ; import javax. UICommand ; import javax. UIForm ; import javax. ActionEvent ; import javax. SelectItem ; import de. Register the TodoController. It is written in Java. It also provides server-side validation, data conversion, defining page navigation, provides extensibility, supports for internationalization, accessibility etc.
The JSF Tag libraries are used to add components on the web pages and connect components with objects on the server. It also contains tag handlers that implements the component tag.
With the help of these features and tools, you can easily and effortlessly create server-side user interface. You can write business logic and user interface separately.
Which enables several various application use cases, such as using different presentation technologies, creating your own custom components directly from the component classes. Facelets is now the preferred presentation technology for building JavaServer Faces based web applications. Although you can also use other Java IDEs. Server: We did not install server seperatly. JSF 2. So, you don't need to install it manually. JavaTpoint offers too many high quality services.
Mail us on [email protected] , to get more information about given services. Please mail your requirement at [email protected] Duration: 1 week to 2 week. JSF Tutorial. Reinforcement Learning. R Programming.
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