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{{Short description|Oriented web application framework for Java}}
{{ Infobox software▼
{{Cleanup bare URLs|date=September 2022}}
| name = Apache Click▼
| logo = [[Image:Click-icon-43.png|43px|Click Framework logo]]▼
| screenshot = ▼
| caption = ▼
| developer = [[Apache Software Foundation]]▼
| discontinued = Yes
| latest release version = 2.3.0
| latest release date
| latest preview version =
| latest preview date
| operating system
| programming language
| genre
| license
| website
}}
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It is a free and [[Open-source software|open-source]] project distributed under the [[Apache License|Apache license]] and runs on any [[JDK]] installation (1.5 or later).
Click was initially created by Malcolm Edgar as the click.sourceforce.net project in 2003. The project then graduated to
==Overview==
The main design goals are simplicity, ease of use, performance and scalability. To achieve these goals Click leverages an intuitive page and component oriented design.
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==Competing frameworks==
There are a number of other component oriented frameworks available for Java such as [[JavaServer Faces|JSF]], [[Tapestry (programming)|Tapestry]], [[WebObjects]], [[Apache Wicket]] and [[Vaadin]].
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== Example ==
A [["Hello, World!" program|Hello World]] Click application, with four files:▼
▲A [[Hello World]] Click application, with four files:
; hello-world.htm
: The default template engine for Click is [[Apache Velocity|Velocity]], the htm file will be similar to a normal, static [[HTML]] page.
<div style="margin-left: 2em;"><
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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</body>
</html>
</
; HelloWorld.java
: The page model that will be bound to the template.
<div style="margin-left: 2em;"><
package org.wikipedia.click;
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}
}
</
; click.xml
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: Click is smart enough to figure out that the <code>HelloWorld</code> page class maps to the template <code>hello-world.htm</code>. We only have to inform Click of the package of the <code>HelloWorld</code> class, in this case <code>org.wikipedia.click</code>. We do that through the <code>click.xml</code> configuration file which allows Click to map <code>hello-world.htm</code> requests to the <code>org.wikipedia.click.HelloWorld</code> page class.
: By default the <code>ClickServlet</code> will attempt to load the application configuration file using the path: <code>/WEB-INF/click.xml</code>
<div style="margin-left: 2em;"><
<?xml version="1.0" encoding="UTF-8"?>
<click-app>
<pages package="org.wikipedia.click"/>
</click-app>
</
; web.xml
: The [[Java servlet|servlet]] application definition.
<div style="margin-left: 2em;"><
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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</servlet-mapping>
</web-app>
</
==Bibliography==
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|archive-url = https://web.archive.org/web/20100114094157/http://www.fdaoud.com/clickbook/
|archive-date = January 14, 2010
|
}}
{{refend}}
==See also==
*[[Comparison of server-side web frameworks|Comparison of web frameworks]]
==References==
{{Reflist}}
==External links==
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