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javaserver faces (jsf) is a popular java specification for building component-based user interfaces for web applications. it simplifies the development integration of web-based user interfaces by providing a framework for building web applications in a component-based way, allowing developers to focus on the business logic rather than the intricacies of html and http.

key concepts of jsf

1. **components**: jsf is built around the concept of ui components. each component represents a part of the user interface, such as buttons, text fields, or entire forms.

2. **managed beans**: these are java classes that are managed by the jsf lifecycle. they hold the data and business logic of the application.

3. **faces context**: this is the main interface to the jsf framework and provides access to the current state of the application, including the managed beans, components, and the http request and response.

4. **navigation**: jsf provides a way to navigate between different views in your application, enabling developers to define rules for moving from one page to another.

5. **expression language (el)**: this is used to access data from managed beans and other objects, simplifying the syntax for accessing properties.

setting up a basic jsf application

to create a simple jsf application, follow these steps:

#### step 1: set up your development environment

1. **download and install java**: ensure you have java development kit (jdk) installed.
2. **download and install apache tomcat**: this will be your web server for running the jsf application.
3. **maven**: it’s helpful to manage dependencies if you use maven.

create a new maven project using your preferred ide or by running the following command in your terminal:



#### step 2: add jsf dependencies

add the following dependencies in the `pom.xml` file of your maven project:



#### step 3: create managed beans

in your java source directory, create a new class called `hellobean.java`:



#### step 4: cre ...

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