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href="https://de.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – German" lang="de" hreflang="de" data-title="Apache Velocity" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – French" lang="fr" hreflang="fr" data-title="Apache Velocity" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – Italian" lang="it" hreflang="it" data-title="Apache Velocity" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – Hungarian" lang="hu" hreflang="hu" data-title="Apache Velocity" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – Japanese" lang="ja" hreflang="ja" data-title="Apache Velocity" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Velocity" title="Velocity – Polish" lang="pl" hreflang="pl" data-title="Velocity" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – Russian" lang="ru" hreflang="ru" data-title="Apache Velocity" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AD%E0%B8%B0%E0%B9%81%E0%B8%9E%E0%B8%8A%E0%B8%B5_%E0%B9%80%E0%B8%A7%E0%B9%82%E0%B8%A5%E0%B8%8B%E0%B8%B4%E0%B8%95%E0%B8%B5" title="อะแพชี เวโลซิตี – Thai" lang="th" hreflang="th" data-title="อะแพชี เวโลซิตี" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Apache_Velocity" title="Apache Velocity – Turkish" lang="tr" hreflang="tr" data-title="Apache Velocity" data-language-autonym="Türkçe" data-language-local-name="Turkish" 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.infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Apache Velocity</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Apache_Velocity_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Apache_Velocity_logo.svg/220px-Apache_Velocity_logo.svg.png" decoding="async" width="220" height="43" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Apache_Velocity_logo.svg/330px-Apache_Velocity_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Apache_Velocity_logo.svg/440px-Apache_Velocity_logo.svg.png 2x" data-file-width="1433" data-file-height="282" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/Apache_Software_Foundation" class="mw-redirect" title="Apache Software Foundation">Apache Software Foundation</a></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">2.3 / February 27, 2021<span class="noprint">; 3 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">2021-02-27</span>)</span><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://svn.apache.org/repos/asf/velocity/engine/">Velocity Repository</a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Cross-platform" class="mw-redirect" title="Cross-platform">Cross-platform</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Template_engine_(web)" class="mw-redirect" title="Template engine (web)">Template engine</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Apache_License_2.0" class="mw-redirect" title="Apache License 2.0">Apache License 2.0</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://velocity.apache.org/">velocity<wbr />.apache<wbr />.org</a></span></td></tr></tbody></table> <p><b>Apache Velocity</b> first released in April 2001, is a <a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a>-based <a href="/wiki/Template_engine_(web)" class="mw-redirect" title="Template engine (web)">template engine</a> that provides a <a href="/wiki/Web_template" class="mw-redirect" title="Web template">template language</a> to reference <a href="/wiki/Object_(computer_science)" title="Object (computer science)">objects</a> defined in Java code. It aims to ensure clean separation between the presentation tier and business tiers in a <a href="/wiki/Web_application" title="Web application">Web application</a> (the <a href="/wiki/Model%E2%80%93view%E2%80%93controller" title="Model–view–controller">model–view–controller</a> design pattern). </p><p>Velocity is an <a href="/wiki/Open-source_software" title="Open-source software">open source</a> software project hosted by the <a href="/wiki/Apache_Software_Foundation" class="mw-redirect" title="Apache Software Foundation">Apache Software Foundation</a>. It is released under the <a href="/wiki/Apache_License" title="Apache License">Apache License</a>. <a href="/w/index.php?title=Jon_Scott_Stevens&action=edit&redlink=1" class="new" title="Jon Scott Stevens (page does not exist)">Jon Scott Stevens</a> derived the name from the <a href="/wiki/AltiVec" title="AltiVec">AltiVec</a> Velocity Engine in the <a href="/wiki/PowerPC_G4" title="PowerPC G4">PowerPC G4</a> chip. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Uses">Uses</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Velocity&action=edit&section=1" title="Edit section: Uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some common types of applications that use Velocity are: </p> <ul><li><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Aws-api-gateway--body-mapping-template.png" class="mw-file-description"><img alt="AWS API Gateway body mapping template" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/72/Aws-api-gateway--body-mapping-template.png/220px-Aws-api-gateway--body-mapping-template.png" decoding="async" width="220" height="195" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/72/Aws-api-gateway--body-mapping-template.png/330px-Aws-api-gateway--body-mapping-template.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/72/Aws-api-gateway--body-mapping-template.png/440px-Aws-api-gateway--body-mapping-template.png 2x" data-file-width="1920" data-file-height="1698" /></a><figcaption>AWS API Gateway body mapping template.</figcaption></figure><a href="/wiki/Web_application" title="Web application">Web applications</a>: <a href="/wiki/Web_developer" title="Web developer">Web developers</a> render <a href="/wiki/HTML" title="HTML">HTML</a> page structures. The content is populated with dynamic information. The page is processed with <i>VelocityViewServlet</i> or any of a number of frameworks that support Velocity.</li> <li><a href="/wiki/Source_code" title="Source code">Source code</a> generation: Velocity can be used to generate <a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a>, <a href="/wiki/SQL" title="SQL">SQL</a>, or <a href="/wiki/PostScript" title="PostScript">PostScript</a> source code, based on <a href="/wiki/Web_template" class="mw-redirect" title="Web template">templates</a>. A number of <a href="/wiki/Open-source_software" title="Open-source software">open source</a> and commercial development <a href="/wiki/Software_package_(installation)" class="mw-redirect" title="Software package (installation)">software packages</a> use Velocity in this manner.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li> <li>Automatic <a href="/wiki/Email" title="Email">emails</a>: Many applications generate automatic emails for account signup, <a href="/wiki/Password" title="Password">password</a> reminders, or automatically sent reports. Using Velocity, the email <a href="/wiki/Web_template" class="mw-redirect" title="Web template">template</a> can be stored in a <a href="/wiki/Text_file" title="Text file">text file</a>, rather than directly embedded in Java code.</li> <li><a href="/wiki/XML" title="XML">XML</a> transformation: Velocity provides an <a href="/wiki/Apache_Ant" title="Apache Ant">Ant</a> task, called Anakia, which reads an XML file and makes it available to a Velocity template. A common application is to convert <a href="/wiki/Software_documentation" title="Software documentation">software documentation</a> stored in a generic "xdoc" format into a styled HTML document.</li> <li><a href="/w/index.php?title=AWS_API_Gateway&action=edit&redlink=1" class="new" title="AWS API Gateway (page does not exist)">AWS API Gateway</a> uses Apache Velocity engine for body mapping templates - <a href="/wiki/JSON" title="JSON">JSON</a> is output.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Code_examples">Code examples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Velocity&action=edit&section=2" title="Edit section: Code examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following <a href="/wiki/Web_template" class="mw-redirect" title="Web template">template</a>: </p> <div class="mw-highlight mw-highlight-lang-html+velocity mw-content-ltr" dir="ltr"><pre><span></span><span class="cp">##</span><span class="c"> Velocity Hello World</span> <span class="p"><</span><span class="nt">html</span><span class="p">></span> <span class="p"><</span><span class="nt">body</span><span class="p">></span> <span class="cp">#</span><span class="nf">set</span><span class="p">(</span> <span class="p">$</span><span class="nv">foo</span> <span class="o">=</span> <span class="s2">"Velocity"</span> <span class="p">)</span> <span class="cp">##</span><span class="c"> followed by</span> Hello <span class="p">$</span><span class="nv">foo</span> World! <span class="p"></</span><span class="nt">body</span><span class="p">></span> <span class="p"></</span><span class="nt">html</span><span class="p">></span> </pre></div> <p>processed by Velocity produces the following HTML: </p> <div class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><pre><span></span><span class="p"><</span><span class="nt">html</span><span class="p">></span> <span class="p"><</span><span class="nt">body</span><span class="p">></span> Hello Velocity World! <span class="p"></</span><span class="nt">body</span><span class="p">></span> <span class="p"></</span><span class="nt">html</span><span class="p">></span> </pre></div><p> Another example using conditions:</p><div class="mw-highlight mw-highlight-lang-velocity mw-content-ltr" dir="ltr"><pre><span></span><span class="cp">#</span><span class="nf">if</span><span class="p">(</span> <span class="p">$</span><span class="nv">foo</span> <span class="o"><</span> <span class="m">10</span> <span class="p">)</span> <span class="x"> **Go North**</span> <span class="cp">#</span><span class="nf">elseif</span><span class="p">(</span> <span class="p">$</span><span class="nv">foo</span> <span class="o">==</span> <span class="m">10</span> <span class="p">)</span> <span class="x"> **Go East**</span> <span class="cp">#</span><span class="nf">elseif</span><span class="p">(</span> <span class="p">$</span><span class="nv">bar</span> <span class="o">==</span> <span class="m">6</span> <span class="p">)</span> <span class="x"> **Go South**</span> <span class="cp">#</span><span class="nf">else</span> <span class="x"> **Go West**</span> <span class="cp">#</span><span class="nf">end</span> </pre></div><p>AWS API Gateway body mapping template, for <a href="/wiki/Amazon_DynamoDB" title="Amazon DynamoDB">DynamoDB</a> HTTP:</p><div class="mw-highlight mw-highlight-lang-velocity mw-content-ltr" dir="ltr"><pre><span></span><span class="err">{</span> <span class="x"> "TableName": "happy-marketer",</span> <span class="x"> "KeyConditionExpression": "pk = :pk AND begins_with(sk, :sk)",</span> <span class="x"> </span><span class="cp">#</span><span class="nf">if</span><span class="p"> ($</span><span class="nv">input</span><span class="p">.</span><span class="nv">params</span><span class="p">(</span><span class="s1">'projectStatus'</span><span class="p">)</span> <span class="o">==</span> <span class="s1">'archived'</span><span class="p">)</span> <span class="x"> "FilterExpression": "projectStatus = :Archived",</span> <span class="x"> </span><span class="cp">#</span><span class="nf">else</span> <span class="x"> "FilterExpression": "projectStatus = :InProgress OR projectStatus = :Completed",</span> <span class="x"> </span><span class="cp">#</span><span class="nf">end</span> <span class="x"> "ExpressionAttributeValues": </span><span class="err">{</span> <span class="x"> ":pk": </span><span class="err">{</span> <span class="x"> "S": "project"</span> <span class="x"> },</span> <span class="x"> ":sk": </span><span class="err">{</span> <span class="x"> "S": "</span><span class="p">$</span><span class="nv">context</span><span class="p">.</span><span class="nv">authorizer</span><span class="p">.</span><span class="nv">claims</span><span class="p">.</span><span class="nv">email</span><span class="x">"</span> <span class="x"> },</span> <span class="x"> </span><span class="cp">#</span><span class="nf">if</span><span class="p"> ($</span><span class="nv">input</span><span class="p">.</span><span class="nv">params</span><span class="p">(</span><span class="s1">'projectStatus'</span><span class="p">)</span> <span class="o">==</span> <span class="s1">'archived'</span><span class="p">)</span> <span class="x"> ":Archived": </span><span class="err">{</span> <span class="x"> "S": "Archived"</span> <span class="x"> }</span> <span class="x"> </span><span class="cp">#</span><span class="nf">else</span> <span class="x"> ":InProgress": </span><span class="err">{</span> <span class="x"> "S": "In Progress"</span> <span class="x"> },</span> <span class="x"> ":Completed": </span><span class="err">{</span> <span class="x"> "S": "Completed"</span> <span class="x"> }</span> <span class="x"> </span><span class="cp">#</span><span class="nf">end</span> <span class="x"> }</span> <span class="x">}</span> </pre></div><p>Another example with <a rel="nofollow" class="external text" href="https://stackoverflow.com/questions/38647604/api-gateway-body-mapping-template-optional-body-parameters">optional array</a>; without condition will fail because of invalid resulting JSON:</p><div class="mw-highlight mw-highlight-lang-velocity mw-content-ltr" dir="ltr"><pre><span></span><span class="err">{</span> <span class="x"> "email": "</span><span class="p">$</span><span class="nv">context</span><span class="p">.</span><span class="nv">authorizer</span><span class="p">.</span><span class="nv">claims</span><span class="p">.</span><span class="nv">email</span><span class="x">"</span> <span class="x"> </span><span class="cp">#</span><span class="nf">if</span><span class="p"> ($</span><span class="nv">input</span><span class="p">.</span><span class="nv">params</span><span class="p">(</span><span class="s1">'countries'</span><span class="p">)</span> <span class="o">!=</span> <span class="s2">""</span><span class="p">)</span> <span class="x"> , "countries": </span><span class="p">$</span><span class="nv">input</span><span class="p">.</span><span class="nv">params</span><span class="p">(</span><span class="s1">'countries'</span><span class="p">)</span> <span class="x"> </span><span class="cp">#</span><span class="nf">end</span> <span class="x">}</span> </pre></div><p>The syntax and overall concept of the Apache Velocity templates is similar to the syntax of the older <a href="/wiki/WebMacro" title="WebMacro">WebMacro</a> template engine, which is now also an open source project. <sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (January 2011)">citation needed</span></a></i>]</sup> </p><div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Velocity&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239009302">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .portalbox-entry{display:table-row;font-size:85%;line-height:110%;height:1.9em;font-style:italic;font-weight:bold}.mw-parser-output .portalbox-image{display:table-cell;padding:0.2em;vertical-align:middle;text-align:center}.mw-parser-output .portalbox-link{display:table-cell;padding:0.2em 0.2em 0.2em 0.3em;vertical-align:middle}@media(min-width:720px){.mw-parser-output .portalleft{clear:left;float:left;margin:0.5em 1em 0.5em 0}.mw-parser-output .portalright{clear:right;float:right;margin:0.5em 0 0.5em 1em}}</style><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Free_and_open-source_software_logo_%282009%29.svg/28px-Free_and_open-source_software_logo_%282009%29.svg.png" decoding="async" width="28" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Free_and_open-source_software_logo_%282009%29.svg/42px-Free_and_open-source_software_logo_%282009%29.svg.png 1.5x, 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href="/w/index.php?title=Apache_Velocity&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://velocity.apache.org/news.html">"Apache Velocity - Project News"</a>. <i>velocity.apache.org</i>. Apache Software Foundation<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-04-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=velocity.apache.org&rft.atitle=Apache+Velocity+-+Project+News&rft_id=https%3A%2F%2Fvelocity.apache.org%2Fnews.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AApache+Velocity" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://wiki.apache.org/velocity/PoweredByVelocity">"PoweredByVelocity"</a>. <i>Velocity Wiki</i>. Wiki.apache.org. 2009-12-30. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20100323223306/http://wiki.apache.org/velocity/PoweredByVelocity">Archived</a> from the original on 23 March 2010<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-03-29</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Velocity+Wiki&rft.atitle=PoweredByVelocity&rft.date=2009-12-30&rft_id=http%3A%2F%2Fwiki.apache.org%2Fvelocity%2FPoweredByVelocity&rfr_id=info%3Asid%2Fen.wikipedia.org%3AApache+Velocity" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Bibliography">Bibliography</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Velocity&action=edit&section=5" title="Edit section: Bibliography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239549316">.mw-parser-output .refbegin{margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li{margin-left:0;padding-left:3.2em;text-indent:-3.2em}.mw-parser-output .refbegin-hanging-indents ul,.mw-parser-output .refbegin-hanging-indents ul li{list-style:none}@media(max-width:720px){.mw-parser-output .refbegin-hanging-indents>ul>li{padding-left:1.6em;text-indent:-1.6em}}.mw-parser-output .refbegin-columns{margin-top:0.3em}.mw-parser-output .refbegin-columns ul{margin-top:0}.mw-parser-output .refbegin-columns li{page-break-inside:avoid;break-inside:avoid-column}@media screen{.mw-parser-output .refbegin{font-size:90%}}</style><div class="refbegin" style=""> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHarropDarwin2004" class="citation cs2">Harrop, Rob; Darwin, Ian (August 30, 2004), <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090705091506/http://www.apress.com/book/view/9781590594100"><i>Pro Jakarta Velocity: From Professional to Expert</i></a> (1st ed.), <a href="/wiki/Apress" class="mw-redirect" title="Apress">Apress</a>, p. 370, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1-59059-410-0" title="Special:BookSources/978-1-59059-410-0"><bdi>978-1-59059-410-0</bdi></a>, archived from <a rel="nofollow" class="external text" href="http://www.apress.com/book/view/9781590594100">the original</a> on July 5, 2009<span class="reference-accessdate">, retrieved <span class="nowrap">September 4,</span> 2009</span></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Pro+Jakarta+Velocity%3A+From+Professional+to+Expert&rft.pages=370&rft.edition=1st&rft.pub=Apress&rft.date=2004-08-30&rft.isbn=978-1-59059-410-0&rft.aulast=Harrop&rft.aufirst=Rob&rft.au=Darwin%2C+Ian&rft_id=http%3A%2F%2Fwww.apress.com%2Fbook%2Fview%2F9781590594100&rfr_id=info%3Asid%2Fen.wikipedia.org%3AApache+Velocity" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFColeD._Gradecki2003" class="citation cs2">Cole, Jim; D. Gradecki, Joseph (July 16, 2003), <a rel="nofollow" class="external text" href="https://web.archive.org/web/20121007002812/http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471457949.html"><i>Mastering Apache Velocity</i></a> (1st ed.), <a href="/wiki/John_Wiley_%26_Sons" class="mw-redirect" title="John Wiley & Sons">Wiley</a>, p. 372, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-471-45794-7" title="Special:BookSources/978-0-471-45794-7"><bdi>978-0-471-45794-7</bdi></a>, archived from <a rel="nofollow" class="external text" href="http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471457949.html">the original</a> on October 7, 2012<span class="reference-accessdate">, retrieved <span class="nowrap">September 4,</span> 2009</span></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Mastering+Apache+Velocity&rft.pages=372&rft.edition=1st&rft.pub=Wiley&rft.date=2003-07-16&rft.isbn=978-0-471-45794-7&rft.aulast=Cole&rft.aufirst=Jim&rft.au=D.+Gradecki%2C+Joseph&rft_id=http%3A%2F%2Fwww.wiley.com%2FWileyCDA%2FWileyTitle%2FproductCd-0471457949.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AApache+Velocity" class="Z3988"></span></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Velocity&action=edit&section=6" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://velocity.apache.org/">Velocity at Apache</a></li> <li><a rel="nofollow" class="external text" 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href="/wiki/Apache_POI" title="Apache POI">POI</a></li> <li><a href="/wiki/Apache_Pig" title="Apache Pig">Pig</a></li> <li><a href="/wiki/Apache_Pinot" title="Apache Pinot">Pinot</a></li> <li><a href="/wiki/Apache_Pivot" title="Apache Pivot">Pivot</a></li> <li><a href="/wiki/Apache_Qpid" title="Apache Qpid">Qpid</a></li> <li><a href="/wiki/Apache_Roller" title="Apache Roller">Roller</a></li> <li><a href="/wiki/Apache_RocketMQ" title="Apache RocketMQ">RocketMQ</a></li> <li><a href="/wiki/Apache_Samza" title="Apache Samza">Samza</a></li> <li><a href="/wiki/Apache_Shiro" title="Apache Shiro">Shiro</a></li> <li><a href="/wiki/Apache_SINGA" title="Apache SINGA">SINGA</a></li> <li><a href="/wiki/Apache_Sling" title="Apache Sling">Sling</a></li> <li><a href="/wiki/Apache_Solr" title="Apache Solr">Solr</a></li> <li><a href="/wiki/Apache_Spark" title="Apache Spark">Spark</a></li> <li><a href="/wiki/Apache_Storm" title="Apache Storm">Storm</a></li> <li><a href="/wiki/Apache_SpamAssassin" title="Apache SpamAssassin">SpamAssassin</a></li> <li><a href="/wiki/Apache_Struts" title="Apache Struts">Struts</a> <ul><li><a href="/wiki/Apache_Struts_1" title="Apache Struts 1">1</a></li></ul></li> <li><a href="/wiki/Apache_Subversion" title="Apache Subversion">Subversion</a></li> <li><a href="/wiki/Apache_Superset" title="Apache Superset">Superset</a></li> <li><a href="/wiki/Apache_SystemDS" title="Apache SystemDS">SystemDS</a></li> <li><a href="/wiki/Apache_Tapestry" title="Apache Tapestry">Tapestry</a></li> <li><a href="/wiki/Apache_Thrift" title="Apache Thrift">Thrift</a></li> <li><a href="/wiki/Apache_Tika" title="Apache Tika">Tika</a></li> <li><a href="/wiki/Apache_TinkerPop" class="mw-redirect" title="Apache TinkerPop">TinkerPop</a></li> <li><a href="/wiki/Apache_Tomcat" title="Apache Tomcat">Tomcat</a></li> <li><a href="/wiki/Apache_Trafodion" class="mw-redirect" title="Apache Trafodion">Trafodion</a></li> <li><a href="/wiki/Apache_Traffic_Server" title="Apache Traffic Server">Traffic Server</a></li> <li><a href="/wiki/UIMA" title="UIMA">UIMA</a></li> <li><a class="mw-selflink selflink">Velocity</a></li> <li><a href="/wiki/Apache_Wicket" title="Apache Wicket">Wicket</a></li> <li><a href="/wiki/Apache_Xalan" title="Apache Xalan">Xalan</a></li> <li><a href="/wiki/Apache_Xerces" title="Apache Xerces">Xerces</a></li> <li><a href="/wiki/Apache_XMLBeans" title="Apache XMLBeans">XMLBeans</a></li> <li>Yetus</li> <li><a href="/wiki/Apache_ZooKeeper" title="Apache ZooKeeper">ZooKeeper</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Apache_Commons" title="Apache Commons">Commons</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Byte_Code_Engineering_Library" title="Byte Code Engineering Library">BCEL</a></li> <li><a href="/wiki/Bean_Scripting_Framework" title="Bean Scripting Framework">BSF</a></li> <li><a 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Ivy">Ivy</a></li> <li><a href="/wiki/Log4j" title="Log4j">Log4j</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Attic</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Apex" title="Apache Apex">Apex</a></li> <li><a href="/wiki/AxKit" title="AxKit">AxKit</a></li> <li><a href="/wiki/Apache_Beehive" title="Apache Beehive">Beehive</a></li> <li><a href="/wiki/Apache_iBATIS" title="Apache iBATIS">iBATIS</a></li> <li><a href="/wiki/Apache_Click" title="Apache Click">Click</a></li> <li><a href="/wiki/Apache_Continuum" title="Apache Continuum">Continuum</a></li> <li><a href="/wiki/Deltacloud" title="Deltacloud">Deltacloud</a></li> <li><a href="/wiki/Etch_(protocol)" title="Etch (protocol)">Etch</a></li> <li><a href="/wiki/Apache_Giraph" title="Apache Giraph">Giraph</a></li> <li><a href="/wiki/Apache_Hama" title="Apache Hama">Hama</a></li> <li><a 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