Apache Velocity: Difference between revisions
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| screenshot = |
| screenshot = |
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| caption = |
| caption = |
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| developer = [[Apache Software Foundation]] |
| developer = [[Apache Software Foundation]] |
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| latest release version = 1.6.3 |
| latest release version = 1.6.3 |
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| latest release date = {{release date|mf=yes|2009|12|16}} |
| latest release date = {{release date|mf=yes|2009|12|16}} |
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| operating system = [[Cross platform]] |
| operating system = [[Cross platform]] |
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| programming language = [[Java (programming language)|Java]] |
| programming language = [[Java (programming language)|Java]] |
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| genre = [[template engine (web)|template engine]] |
| genre = [[template engine (web)|template engine]] |
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| license = [[Apache License]] 2.0 |
| license = [[Apache License]] 2.0 |
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| website = http://velocity.apache.org |
| website = http://velocity.apache.org |
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'''Apache Velocity''' (formerly known as Jakarta Velocity) is an [[open source]] software project directed by the [[Apache Software Foundation]]. Velocity is a [[Java (programming language)|Java]]-based [[template engine (web)|template engine]] that provides a simple yet powerful [[Web template#Template languages|template language]] to reference [[object (computer science)|object]]s defined in Java code. Its aim is to ensure clean separation between the presentation tier and business tiers in a [[Web application]] (the [[model-view-controller design pattern]]). |
'''Apache Velocity''' (formerly known as Jakarta Velocity) is an [[open source]] software project directed by the [[Apache Software Foundation]]. Velocity is a [[Java (programming language)|Java]]-based [[template engine (web)|template engine]] that provides a simple yet powerful [[Web template#Template languages|template language]] to reference [[object (computer science)|object]]s defined in Java code. Its aim is to ensure clean separation between the presentation tier and business tiers in a [[Web application]] (the [[model-view-controller design pattern]]). |
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* [[Web application]]s: [[Web designer]]s create [[HTML]] pages with [[placeholder]]s for dynamic information. The page is processed with ''VelocityViewServlet'' or any of a number of frameworks which support Velocity. This approach to web application development is called [[Model-view-controller]] (MVC), and is intended to be a direct replacement for applications developed with [[JavaServer Pages|JSP]] or [[PHP]]. |
* [[Web application]]s: [[Web designer]]s create [[HTML]] pages with [[placeholder]]s for dynamic information. The page is processed with ''VelocityViewServlet'' or any of a number of frameworks which support Velocity. This approach to web application development is called [[Model-view-controller]] (MVC), and is intended to be a direct replacement for applications developed with [[JavaServer Pages|JSP]] or [[PHP]]. |
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* [[Source code]] generation: Velocity can be used to generate Java source code, [[SQL]], or [[PostScript]], based on [[Web template|templates]]. A number of [[open source]] and commercial development [[ |
* [[Source code]] generation: Velocity can be used to generate Java source code, [[SQL]], or [[PostScript]], based on [[Web template|templates]]. A number of [[open source]] and commercial development [[ package (installation)|software packages]] use Velocity in this manner.<ref>http://wiki.apache.org/velocity/PoweredByVelocity</ref> |
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* Automatic [[email]]s: Many applications generate automatic emails for account signup, [[password]] reminders, or automatically sent reports. Using Velocity, the email [[web template|template]] can be stored in a [[text file]], rather than directly embedded in Java code. |
* Automatic [[email]]s: Many applications generate automatic emails for account signup, [[password]] reminders, or automatically sent reports. Using Velocity, the email [[web template|template]] can be stored in a [[text file]], rather than directly embedded in Java code. |
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* [[XML]] transformation: Velocity provides an [[Apache Ant|Ant]] task, called Anakia, which reads an XML file and makes it available to a Velocity template. A common application is to convert [[documentation]] stored in a generic "xdoc" format into a styled HTML document. |
* [[XML]] transformation: Velocity provides an [[Apache Ant|Ant]] task, called Anakia, which reads an XML file and makes it available to a Velocity template. A common application is to convert [[documentation]] stored in a generic "xdoc" format into a styled HTML document. |
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The syntax and overall concept of the Apache Velocity templates is very similar to the syntax of the older [[WebMacro]] template engine which is now also an open source project. |
The syntax and overall concept of the Apache Velocity templates is very similar to the syntax of the older [[WebMacro]] template engine which is now also an open source project. |
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==See also== |
==See also== |
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*[[Apache Torque]] |
*[[Apache Torque]] |
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*[[JavaServer Pages|JSP]] |
*[[JavaServer Pages|JSP]] |
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{{reflist}} |
{{reflist}} |
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==Bibliography== |
==Bibliography== |
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{{refbegin}} |
{{refbegin}} |
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*{{citation |
*{{citation |
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| first1 = Rob |
| first1 = Rob |
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| last1 = Harrop |
| last1 = Harrop |
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| first2 = Ian |
| first2 = Ian |
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| last2 = Darwin |
| last2 = Darwin |
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| date = August 30, 2004 |
| date = August 30, 2004 |
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| title = Pro Jakarta Velocity: From Professional to Expert |
| title = Pro Jakarta Velocity: From Professional to Expert |
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| edition = 1st |
| edition = 1st |
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| publisher = [[Apress]] |
| publisher = [[Apress]] |
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| |
| = 370 |
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| isbn = 978-1590594100 |
| isbn = 978-1590594100 |
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| url = http://www.apress.com/book/view/9781590594100 |
| url = http://www.apress.com/book/view/9781590594100 |
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| first1 = Jim |
| first1 = Jim |
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| last1 = Cole |
| last1 = Cole |
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| first2 = Joseph |
| first2 = Joseph |
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| last2 = D. Gradecki |
| last2 = D. Gradecki |
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| date = July 16, 2003 |
| date = July 16, 2003 |
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| title = Mastering Apache Velocity |
| title = Mastering Apache Velocity |
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| edition = 1st |
| edition = 1st |
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| publisher = [[John Wiley & Sons|Wiley]] |
| publisher = [[John Wiley & Sons|Wiley]] |
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| |
| = 372 |
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| isbn = 978-0471457947 |
| isbn = 978-0471457947 |
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| url = http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471457949.html |
| url = http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471457949.html |
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Revision as of 08:51, 29 March 2010
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (March 2010) |
| Jakarta Velocity Logo | |
| Developer(s) | Apache Software Foundation |
|---|---|
| Stable release | 1.6.3
/ December 16, 2009 |
| Repository | |
| Written in | Java |
| Operating system | Cross platform |
| Type | template engine |
| License | Apache License 2.0 |
| Website | http://velocity.apache.org |
Apache Velocity (formerly known as Jakarta Velocity) is an open source software project directed by the Apache Software Foundation. Velocity is a Java-based template engine that provides a simple yet powerful template language to reference objects defined in Java code. Its aim is to ensure clean separation between the presentation tier and business tiers in a Web application (the model-view-controller design pattern).
Uses
Some common types of applications which use Velocity are:
- Web applications: Web designers create HTML pages with placeholders for dynamic information. The page is processed with VelocityViewServlet or any of a number of frameworks which support Velocity. This approach to web application development is called Model-view-controller (MVC), and is intended to be a direct replacement for applications developed with JSP or PHP.
- Source code generation: Velocity can be used to generate Java source code, SQL, or PostScript, based on templates. A number of open source and commercial development software packages use Velocity in this manner.[1]
- Automatic emails: Many applications generate automatic emails for account signup, password reminders, or automatically sent reports. Using Velocity, the email template can be stored in a text file, rather than directly embedded in Java code.
- XML transformation: Velocity provides an Ant task, called Anakia, which reads an XML file and makes it available to a Velocity template. A common application is to convert documentation stored in a generic "xdoc" format into a styled HTML document.
Code example
The following template:
## Velocity Hello World
<html>
<body>
#set( $foo = "Velocity" )
## followed by
Hello $foo World!
</body>
</html>
processed by Velocity will produce the following text:
<html>
<body>
Hello Velocity World!
</body>
</html>
The syntax and overall concept of the Apache Velocity templates is very similar to the syntax of the older WebMacro template engine which is now also an open source project.
See also
References
- ^ "PoweredByVelocity". Velocity Wiki. Wiki.apache.org. 2009-12-30. Retrieved 2010-03-29.
Bibliography
- Harrop, Rob; Darwin, Ian (August 30, 2004), Pro Jakarta Velocity: From Professional to Expert (1st ed.), Apress, p. 370, ISBN 978-1590594100
- Cole, Jim; D. Gradecki, Joseph (July 16, 2003), Mastering Apache Velocity (1st ed.), Wiley, p. 372, ISBN 978-0471457947
External links
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