Learn Java for Web Development

274 CHAPTER 6: Component-Based Web Development Using JSF 2

Listing 6-1 illustrates the code of the form.xhtml file.

Listing 6-1. form.xhtml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE html >

<html xmlns="http://www.w3.org/1999/xhtml"

xmlns:h="http://java.sun.com/jsf/html">

First JSF app

Enter your name:

 Line 4: The xmlns attribute declares the JSF namespace.  Lines 6, 9, 12, 13, and 14: Some tags have prefixes, such as h:head and h:inputText. These are JSF tags. The h:inputText and h:commandButton tags correspond to the text field and Submit button in Figure 6-11.  Line 13: The input fields are linked to object properties. For example, attributevalue="#{helloBean.name}" tells the JSF implementation to link the text field with the name property of a user object.  Line 14: The #{...} delimiters enclose expressions in the JSF expression language.  Line 14: When you enter the name and click the Submit button, the hello.xhtml file is displayed, as specified in the action attribute of the h:commandButton tag.

Listing 6-2 illustrates the code of the hello.xhtml file.

Listing 6-2. hello.xhtml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml"

xmlns:h="http://java.sun.com/jsf/html">

Hello world

Learn Java for Web Development

Enter your name:

Hello #{helloBean.name}

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