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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Commons_Proper" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Commons_Proper"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Commons Proper</span> </div> </a> <ul id="toc-Commons_Proper-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Commons_Sandbox" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Commons_Sandbox"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Commons Sandbox</span> </div> </a> <ul id="toc-Commons_Sandbox-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Commons_Dormant" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Commons_Dormant"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Commons Dormant</span> </div> </a> <ul id="toc-Commons_Dormant-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " 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Available in 11 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-11" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">11 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – Catalan" lang="ca" hreflang="ca" data-title="Apache Commons" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – German" lang="de" hreflang="de" data-title="Apache Commons" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – Spanish" lang="es" hreflang="es" data-title="Apache Commons" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – French" lang="fr" hreflang="fr" data-title="Apache Commons" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%95%84%ED%8C%8C%EC%B9%98_%EC%BB%A4%EB%A8%BC%EC%A6%88" title="아파치 커먼즈 – Korean" lang="ko" hreflang="ko" data-title="아파치 커먼즈" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – Japanese" lang="ja" hreflang="ja" data-title="Apache Commons" 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-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Apache Commons" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – Polish" lang="pl" hreflang="pl" data-title="Apache Commons" 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_Commons" title="Apache Commons – Russian" lang="ru" hreflang="ru" data-title="Apache Commons" 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%88%E0%B8%B2%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%8C%E0%B8%95%E0%B8%B2_%E0%B8%84%E0%B8%AD%E0%B8%A1%E0%B8%A1%E0%B8%AD%E0%B8%99%E0%B8%AA%E0%B9%8C" title="จาการ์ตา คอมมอนส์ – Thai" lang="th" hreflang="th" data-title="จาการ์ตา คอมมอนส์" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Apache_Commons" title="Apache Commons – Chinese" lang="zh" hreflang="zh" data-title="Apache Commons" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q616659#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button 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The purpose of the Commons is to provide reusable, <a href="/wiki/Open-source_software" title="Open-source software">open source</a> <a href="/wiki/Java_(software_platform)" title="Java (software platform)">Java</a> software. The Commons is composed of three parts: proper, sandbox, and dormant. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Commons_Proper">Commons Proper</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Commons&action=edit&section=1" title="Edit section: Commons Proper"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Commons Proper is dedicated to creating and maintaining reusable <a href="/wiki/Java_(software_platform)" title="Java (software platform)">Java</a> components. The Commons Proper is a place for collaboration and sharing, where developers from throughout the Apache community can work together on projects to be shared by Apache projects and Apache users. Commons developers will make an effort to ensure that their components have minimal dependencies on other <a href="/wiki/Library_(computer_science)" class="mw-redirect" title="Library (computer science)">software libraries</a>, so that these components can be <a href="/wiki/Software_deployment" title="Software deployment">deployed</a> easily. In addition, Commons components will keep their <a href="/wiki/Interface_(computer_science)" class="mw-redirect" title="Interface (computer science)">interfaces</a> as stable as possible, so that Apache users, as well as other Apache projects, can implement these components without having to worry about changes in the future.<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> </p> <table class="wikitable sortable"> <tbody><tr> <th>Components </th> <th>Description </th> <th>Latest version </th> <th>Released </th></tr> <tr> <td><a href="/wiki/Byte_Code_Engineering_Library" title="Byte Code Engineering Library">BCEL</a> </td> <td>Byte Code Engineering Library - analyze, create, and manipulate Java class files </td> <td>6.10.0 </td> <td>2024-07-13 </td></tr> <tr> <td><a href="/wiki/Apache_Commons_BeanUtils" title="Apache Commons BeanUtils">BeanUtils</a> </td> <td>Easy-to-use wrappers around the Java reflection and introspection APIs </td> <td>1.9.4 </td> <td>2019-06-12 </td></tr> <tr> <td><a href="/wiki/Bean_Scripting_Framework" title="Bean Scripting Framework">BSF</a> </td> <td>Bean Scripting Framework - interface to scripting languages, including JSR-223 </td> <td>3.1 </td> <td>2011-08-17 </td></tr> <tr> <td>Chain </td> <td><i>Chain of Responsibility</i> pattern implementation </td> <td>1.2 </td> <td>2008-06-01 </td></tr> <tr> <td>CLI </td> <td>Command Line arguments parser </td> <td>1.9.0 </td> <td>2024-08-10 </td></tr> <tr> <td>Codec </td> <td>General encoding/decoding algorithms (for example phonetic, base64, URL) </td> <td>1.17.1 </td> <td>2024-07-12 </td></tr> <tr> <td>Collections </td> <td>Extends or augments the <a href="/wiki/Java_collections_framework" title="Java collections framework">Java Collections Framework</a> </td> <td>4.5.0-M2 </td> <td>2024-06-15 </td></tr> <tr> <td>Compress </td> <td>Defines an API for working with <a href="/wiki/Tar_(computing)" title="Tar (computing)">TAR</a>, <a href="/wiki/ZIP_(file_format)" title="ZIP (file format)">ZIP</a> and <a href="/wiki/Bzip2" title="Bzip2">BZIP2</a> files </td> <td>1.27.1 </td> <td>2024-08-16 </td></tr> <tr> <td>Configuration </td> <td>Reading of configuration/preferences files in various formats </td> <td>2.11.0 </td> <td>2024-06-07 </td></tr> <tr> <td>Crypto </td> <td>Cryptographic library optimized with AES-NI wrapping <a href="/wiki/OpenSSL" title="OpenSSL">OpenSSL</a> or JCE algorithm implementations </td> <td>1.2.0 </td> <td>2023-01-14 </td></tr> <tr> <td>CSV </td> <td>Component for reading and writing <a href="/wiki/Comma-separated_values" title="Comma-separated values">comma separated value</a> files </td> <td>1.12.0 </td> <td>2024-09-21 </td></tr> <tr> <td><a href="/wiki/Commons_Daemon" title="Commons Daemon">Daemon</a> </td> <td>Generic <a href="/wiki/Daemon_(Unix)" class="mw-redirect" title="Daemon (Unix)">Daemon (unix)</a> or <a href="/wiki/Service_(Windows)" class="mw-redirect" title="Service (Windows)">Service (Windows)</a> wrapper for Java code </td> <td>1.4.0 </td> <td>2024-05-24 </td></tr> <tr> <td>DBCP </td> <td>Database connection pooling services </td> <td>2.12.0 </td> <td>2024-02-29 </td></tr> <tr> <td>DbUtils </td> <td>JDBC helper library </td> <td>1.8.1 </td> <td>2023-09-09 </td></tr> <tr> <td>Digester </td> <td><a href="/wiki/XML" title="XML">XML</a>-to-Java-object mapping utility </td> <td>3.2 </td> <td>2011-12-13 </td></tr> <tr> <td>Email </td> <td>Library for sending e-mails </td> <td>1.5 </td> <td>2017-08-01 </td></tr> <tr> <td>Exec </td> <td>API for dealing with external process execution and environment management </td> <td>1.4.0 </td> <td>2024-01-01 </td></tr> <tr> <td>FileUpload </td> <td>File upload capability for <a href="/wiki/Servlets" class="mw-redirect" title="Servlets">servlets</a> and web applications </td> <td>1.5 </td> <td>2023-02-13 </td></tr> <tr> <td>Functor </td> <td>Supports <a href="/wiki/Functional_programming" title="Functional programming">functional programming</a> using <i>functors</i>, objects representing functions </td> <td>1.0 RC1 </td> <td>2011-10-20 </td></tr> <tr> <td>Geometry </td> <td>General-purpose library for geometric processing </td> <td>1.0 </td> <td>2021-08-21 </td></tr> <tr> <td>Imaging </td> <td>Pure-Java image library </td> <td>1.0-alpha5 </td> <td>2024-04-15 </td></tr> <tr> <td>IO </td> <td>Collection of I/O utilities </td> <td>2.18.0 </td> <td>2024-11-16 </td></tr> <tr> <td>JCI </td> <td>Java Compiler Interface </td> <td>1.1 </td> <td>2013-10-14 </td></tr> <tr> <td>JCS </td> <td>Java Caching System </td> <td>3.2.1 </td> <td>2024-05-27 </td></tr> <tr> <td><a href="/wiki/Apache_Jelly" title="Apache Jelly">Jelly</a> </td> <td><a href="/wiki/XML" title="XML">XML</a> based scripting and processing engine </td> <td>1.0.1 </td> <td>2017-09-25 </td></tr> <tr> <td>JEXL </td> <td>Expression language which extends the Expression Language of the JSTL </td> <td>3.4.0 </td> <td>2024-06-02 </td></tr> <tr> <td>JXPath </td> <td>Utilities for manipulating <a href="/wiki/JavaBeans" title="JavaBeans">Java Beans</a> using the <a href="/wiki/XPath" title="XPath">XPath</a> syntax </td> <td>1.3 </td> <td>2008-08-11 </td></tr> <tr> <td>Lang </td> <td>Provides extra functionality for classes in <a href="/wiki/Java.lang" class="mw-redirect" title="Java.lang">java.lang</a> </td> <td>3.17.0 </td> <td>2024-08-24 </td></tr> <tr> <td><a href="/wiki/Apache_Commons_Logging" title="Apache Commons Logging">Logging</a> </td> <td>Wrapper around a variety of logging API implementations </td> <td>1.3.4 </td> <td>2024-08-16 </td></tr> <tr> <td>Math </td> <td>Lightweight, self-contained mathematics and statistics components </td> <td>4.0-beta1 </td> <td>2022-12-20 </td></tr> <tr> <td>Net </td> <td>Collection of network utilities and protocol implementations </td> <td>3.11.1 </td> <td>2024-06-07 </td></tr> <tr> <td>Numbers </td> <td>Number types (complex, quaternion, fraction) and utilities (arrays, combinatorics) </td> <td>1.2 </td> <td>2024-08-12 </td></tr> <tr> <td>Pool </td> <td>Generic object pooling component </td> <td>2.12.0 </td> <td>2023-09-30 </td></tr> <tr> <td>Proxy </td> <td>Library for creating dynamic proxies </td> <td>2.0-RC1 </td> <td>2014-04-07 </td></tr> <tr> <td>RDF </td> <td>Common implementation of <a href="/wiki/Resource_Description_Framework" title="Resource Description Framework">RDF</a> 1.1 that could be implemented by systems on the JVM </td> <td>0.5.0 </td> <td>2017-12-08 </td></tr> <tr> <td>RNG </td> <td>Implementions of pseudo-random numbers generators </td> <td>1.6 </td> <td>2024-07-15 </td></tr> <tr> <td>SCXML </td> <td>Implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine </td> <td>2.0-M1 </td> <td>2014-04-03 </td></tr> <tr> <td>Statistics </td> <td>Utilities for statistical applications </td> <td>1.1 </td> <td>2024-08-20 </td></tr> <tr> <td>Text </td> <td>Library focused on algorithms working on strings </td> <td>1.12.0 </td> <td>2024-04-13 </td></tr> <tr> <td>Validator </td> <td>Framework to define validators and validation rules in an <a href="/wiki/XML" title="XML">XML</a> file </td> <td>1.8.0 </td> <td>2023-12-02 </td></tr> <tr> <td>VFS </td> <td>Virtual File System component for treating files, <a href="/wiki/FTP" class="mw-redirect" title="FTP">FTP</a>, <a href="/wiki/Server_Message_Block" title="Server Message Block">SMB</a>, <a href="/wiki/ZIP_(file_format)" title="ZIP (file format)">ZIP</a> and such like as a single logical file system </td> <td>2.9.0 </td> <td>2021-06-16 </td></tr> <tr> <td>Weaver </td> <td>Provides an easy way to enhance (weave) compiled bytecode </td> <td>2.0 </td> <td>2018-09-07 </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Commons_Sandbox">Commons Sandbox</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Commons&action=edit&section=2" title="Edit section: Commons Sandbox"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Commons Sandbox provides a workspace where Commons contributors collaborate and experiment on projects not included in the Commons Proper. Commons members champion projects in the Sandbox for promotion to the Commons Proper, and groups of developers work to enhance Sandbox projects until they meet the standards for promotion. </p> <table class="wikitable"> <tbody><tr> <th>Components </th> <th>Description </th></tr> <tr> <td>BeanUtils2 </td> <td>Redesign of Commons BeanUtils </td></tr> <tr> <td>ClassScan </td> <td>Find Class interfaces, methods, fields, and annotations without loading </td></tr> <tr> <td>CLI2 </td> <td>Redesign of Commons CLI </td></tr> <tr> <td>Convert </td> <td>Aims to provide a single library dedicated to the task of converting an object of one type to another </td></tr> <tr> <td>Finder </td> <td>Java library inspired by the <a href="/wiki/Find_(Unix)" title="Find (Unix)">UNIX find</a> command </td></tr> <tr> <td>Flatfile </td> <td>Java library for working with flat data structures </td></tr> <tr> <td>Graph </td> <td>General purpose Graph APIs and algorithms </td></tr> <tr> <td>I18n </td> <td>Adds the feature of localized message bundles that consist of one or many localized texts that belong together </td></tr> <tr> <td>Id </td> <td>Component for generating identifiers </td></tr> <tr> <td>Inject </td> <td>Implementation of JSR 330, a standards compliant dependency injection framework </td></tr> <tr> <td>Javaflow </td> <td><a href="/wiki/Continuation" title="Continuation">Continuation</a> implementation to capture the state of the application </td></tr> <tr> <td>JNet </td> <td>Allows using dynamically registered URL stream handlers through the java.net API </td></tr> <tr> <td>Monitoring </td> <td>Aims to provide a simple but extensible monitoring solution for Java applications </td></tr> <tr> <td>Nabla </td> <td>Provides automatic differentiation classes that can generate derivative of any function implemented in the Java language </td></tr> <tr> <td>OpenPGP </td> <td>Interface to signing and verifying data using <a href="/wiki/OpenPGP" class="mw-redirect" title="OpenPGP">OpenPGP</a> </td></tr> <tr> <td>Performance </td> <td>Small framework for <a href="/wiki/Microbenchmark" class="mw-redirect" title="Microbenchmark">microbenchmark</a> clients, with implementations for Commons DBCP and Pool </td></tr> <tr> <td>Pipeline </td> <td>Provides a set of pipeline utilities designed around work queues that run in parallel to sequentially process data objects </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Commons_Dormant">Commons Dormant</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Commons&action=edit&section=3" title="Edit section: Commons Dormant"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Commons Dormant is a collection of components that have been declared inactive due to little recent development activity. These components may be used, but must be built yourself. It is best to assume that these components will not be released in the near future. </p> <table class="wikitable"> <tbody><tr> <th>Components </th> <th>Description </th></tr> <tr> <td>Attributes </td> <td>Runtime API to metadata attributes such as doclet tags </td></tr> <tr> <td>Betwixt </td> <td>Services for mapping <a href="/wiki/JavaBeans" title="JavaBeans">JavaBeans</a> to <a href="/wiki/XML" title="XML">XML</a> documents and vice versa </td></tr> <tr> <td>Cache </td> <td>Provides object caching services </td></tr> <tr> <td>Clazz </td> <td>Focuses on introspection and class manipulation </td></tr> <tr> <td>Contract </td> <td>Component for making features that come along with contract based programming available </td></tr> <tr> <td>Convert </td> <td>Aims to provide a single library dedicated to the task of converting an object of one type to another </td></tr> <tr> <td>Discovery </td> <td>Tools for locating resources by mapping service/reference names to resource names </td></tr> <tr> <td>EL </td> <td>Interpreter for the Expression Language defined by the JSP 2.0 specification </td></tr> <tr> <td>Events </td> <td>Provides additional classes for firing and handling events. It focuses on the <a href="/wiki/Java_collections_framework" title="Java collections framework">Java Collections Framework</a>, providing decorators to other collections that fire events. </td></tr> <tr> <td>Feedparser </td> <td><a href="/wiki/RSS" title="RSS">RSS</a> and <a href="/wiki/Atom_(web_standard)" title="Atom (web standard)">Atom</a> parser designed to support all major versions of RSS and Atom, as well as easy ad hoc extension and RSS 1.0 modules capability </td></tr> <tr> <td>JJar </td> <td>Jakarta JAR Archive Repository </td></tr> <tr> <td>Latka </td> <td><a href="/wiki/HTTP" title="HTTP">HTTP</a> functional testing suite for automated QA, acceptance and regression testing </td></tr> <tr> <td>Launcher </td> <td>Cross platform Java application launcher </td></tr> <tr> <td>Mapper </td> <td>Thin abstraction layer around a project's chosen data mapping technology (a.k.a. <a href="/wiki/DAO_Pattern" class="mw-redirect" title="DAO Pattern">DAO pattern</a>) </td></tr> <tr> <td>Messenger </td> <td>Easy to use and lightweight framework for working with JMS in the web tier </td></tr> <tr> <td>Modeler </td> <td>Mechanisms to create Model MBeans compatible with JMX specification </td></tr> <tr> <td><a href="/wiki/OGNL" title="OGNL">OGNL</a> </td> <td>Object-Graph Navigation Language </td></tr> <tr> <td>Primitives </td> <td>Smaller, faster and easier to work with types supporting Java primitive types </td></tr> <tr> <td>Resources </td> <td>Provides a lightweight framework for defining and looking up internationalized message strings keyed by a java.util.Locale and a message key </td></tr> <tr> <td>Scaffold </td> <td>Toolkit for building web applications </td></tr> <tr> <td>ThreadPool </td> <td>Simple component for asynchronously dispatching work to another thread in a pool for simple multithreaded programming </td></tr> <tr> <td>Transaction </td> <td>Implementations for multi-level locks, transactional collections and transactional file access </td></tr> <tr> <td>Workflow </td> <td>Provides a framework for building workflow management systems </td></tr> <tr> <td>XMLIO </td> <td>Simple and fast importer for <a href="/wiki/XML" title="XML">XML</a> configuration or import files </td></tr></tbody></table> <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_Commons&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Google_Guava" title="Google Guava">Google Guava</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Commons&action=edit&section=5" 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"><a rel="nofollow" class="external text" href="https://commons.apache.org/">The Apache Commons root page</a></span> </li> </ol></div></div> <p><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 id="CITEREFGoyal2003" class="citation cs2">Goyal, Vikram (2003), <a rel="nofollow" class="external text" href="http://www.onjava.com/pub/a/onjava/2003/06/25/commons.html"><i>Using the Jakarta Commons, Part I</i></a><span class="reference-accessdate">, retrieved <span class="nowrap">August 13,</span> 2006</span></cite><span 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navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Accumulo" title="Apache Accumulo">Accumulo</a></li> <li><a href="/wiki/Apache_ActiveMQ" title="Apache ActiveMQ">ActiveMQ</a></li> <li><a href="/wiki/Apache_Airavata" title="Apache Airavata">Airavata</a></li> <li><a href="/wiki/Apache_Airflow" title="Apache Airflow">Airflow</a></li> <li><a href="/wiki/Apache_Allura" title="Apache Allura">Allura</a></li> <li><a href="/wiki/Apache_Ambari" class="mw-redirect" title="Apache Ambari">Ambari</a></li> <li><a href="/wiki/Apache_Ant" title="Apache Ant">Ant</a></li> <li><a href="/wiki/Apache_Aries" title="Apache Aries">Aries</a></li> <li><a href="/wiki/Apache_Arrow" title="Apache Arrow">Arrow</a></li> <li><a href="/wiki/Apache_HTTP_Server" title="Apache HTTP Server">Apache HTTP Server</a></li> <li><a href="/wiki/Apache_Portable_Runtime" title="Apache Portable Runtime">APR</a></li> <li><a href="/wiki/Apache_Avro" title="Apache Avro">Avro</a></li> <li><a href="/wiki/Apache_Axis" title="Apache Axis">Axis</a></li> <li><a href="/wiki/Apache_Axis2" title="Apache Axis2">Axis2</a></li> <li><a href="/wiki/Apache_Beam" title="Apache Beam">Beam</a></li> <li><a href="/wiki/Apache_Bloodhound" class="mw-redirect" title="Apache Bloodhound">Bloodhound</a></li> <li><a href="/wiki/Apache_Brooklyn" title="Apache Brooklyn">Brooklyn</a></li> <li><a href="/wiki/Apache_Calcite" title="Apache Calcite">Calcite</a></li> <li><a href="/wiki/Apache_Camel" title="Apache Camel">Camel</a></li> <li><a href="/wiki/Apache_CarbonData" title="Apache CarbonData">CarbonData</a></li> <li><a href="/wiki/Apache_Cassandra" title="Apache Cassandra">Cassandra</a></li> <li><a href="/wiki/Apache_Cayenne" title="Apache Cayenne">Cayenne</a></li> <li><a href="/wiki/Apache_CloudStack" title="Apache CloudStack">CloudStack</a></li> <li><a href="/wiki/Apache_Cocoon" title="Apache Cocoon">Cocoon</a></li> <li><a href="/wiki/Apache_Cordova" title="Apache Cordova">Cordova</a></li> <li><a href="/wiki/Apache_CouchDB" title="Apache CouchDB">CouchDB</a></li> <li><a href="/wiki/Apache_cTAKES" title="Apache cTAKES">cTAKES</a></li> <li><a href="/wiki/Apache_CXF" title="Apache CXF">CXF</a></li> <li><a href="/wiki/Apache_Derby" title="Apache Derby">Derby</a></li> <li><a href="/wiki/Apache_Directory" title="Apache Directory">Directory</a></li> <li><a href="/wiki/Apache_Drill" title="Apache Drill">Drill</a></li> <li><a href="/wiki/Apache_Druid" title="Apache Druid">Druid</a></li> <li><a href="/wiki/Apache_Empire-db" title="Apache Empire-db">Empire-db</a></li> <li><a href="/wiki/Apache_Felix" title="Apache Felix">Felix</a></li> <li><a href="/wiki/Apache_Flex" title="Apache Flex">Flex</a></li> <li><a href="/wiki/Apache_Flink" title="Apache Flink">Flink</a></li> <li><a href="/wiki/Apache_Flume" class="mw-redirect" title="Apache Flume">Flume</a></li> <li><a href="/wiki/FreeMarker" title="FreeMarker">FreeMarker</a></li> <li><a href="/wiki/Apache_Geronimo" title="Apache Geronimo">Geronimo</a></li> <li><a href="/wiki/Apache_Groovy" title="Apache Groovy">Groovy</a></li> <li><a href="/wiki/Apache_Guacamole" title="Apache Guacamole">Guacamole</a></li> <li><a href="/wiki/Apache_Gump" title="Apache Gump">Gump</a></li> <li><a href="/wiki/Apache_Hadoop" title="Apache Hadoop">Hadoop</a></li> <li><a href="/wiki/Apache_HBase" title="Apache HBase">HBase</a></li> <li><a href="/wiki/Apache_Helix" title="Apache Helix">Helix</a></li> <li><a href="/wiki/Apache_Hive" title="Apache Hive">Hive</a></li> <li><a href="/wiki/Apache_Iceberg" title="Apache Iceberg">Iceberg</a></li> <li><a href="/wiki/Apache_Ignite" title="Apache Ignite">Ignite</a></li> <li><a href="/wiki/Apache_Impala" title="Apache Impala">Impala</a></li> <li><a href="/wiki/Apache_Jackrabbit" title="Apache Jackrabbit">Jackrabbit</a></li> <li><a href="/wiki/Apache_James" title="Apache James">James</a></li> <li><a href="/wiki/Apache_Jena" title="Apache Jena">Jena</a></li> <li><a href="/wiki/Apache_JMeter" title="Apache JMeter">JMeter</a></li> <li><a href="/wiki/Apache_Kafka" title="Apache Kafka">Kafka</a></li> <li><a href="/wiki/Apache_Kudu" title="Apache Kudu">Kudu</a></li> <li><a href="/wiki/Apache_Kylin" title="Apache Kylin">Kylin</a></li> <li><a href="/wiki/Apache_Lucene" title="Apache Lucene">Lucene</a></li> <li><a href="/wiki/Apache_Mahout" title="Apache Mahout">Mahout</a></li> <li><a href="/wiki/Apache_Maven" title="Apache Maven">Maven</a></li> <li><a href="/wiki/Apache_MINA" title="Apache MINA">MINA</a></li> <li><a href="/wiki/Mod_perl" title="Mod perl">mod_perl</a></li> <li><a href="/wiki/Apache_MyFaces" title="Apache MyFaces">MyFaces</a></li> <li><a href="/wiki/Apache_Mynewt" title="Apache Mynewt">Mynewt</a></li> <li><a href="/wiki/Apache_NiFi" title="Apache NiFi">NiFi</a></li> <li><a href="/wiki/NetBeans" title="NetBeans">NetBeans</a></li> <li><a href="/wiki/Apache_Nutch" title="Apache Nutch">Nutch</a></li> <li><a href="/wiki/NuttX" title="NuttX">NuttX</a></li> <li><a href="/wiki/Apache_OFBiz" title="Apache OFBiz">OFBiz</a></li> <li><a href="/wiki/Apache_Oozie" title="Apache Oozie">Oozie</a></li> <li><a href="/wiki/Apache_OpenEJB" title="Apache OpenEJB">OpenEJB</a></li> <li><a href="/wiki/Apache_OpenJPA" title="Apache OpenJPA">OpenJPA</a></li> <li><a href="/wiki/Apache_OpenNLP" title="Apache OpenNLP">OpenNLP</a></li> <li><a href="/wiki/Apache_OpenOffice" title="Apache OpenOffice">OрenOffice</a></li> <li><a href="/wiki/Apache_ORC" title="Apache ORC">ORC</a></li> <li><a href="/wiki/Apache_PDFBox" title="Apache PDFBox">PDFBox</a></li> <li><a href="/wiki/Apache_Parquet" title="Apache Parquet">Parquet</a></li> <li><a href="/wiki/Apache_Phoenix" title="Apache Phoenix">Phoenix</a></li> <li><a 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 href="/wiki/Apache_Velocity" title="Apache Velocity">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 class="mw-selflink selflink">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 href="/wiki/Commons_Daemon" title="Commons Daemon">Daemon</a></li> <li><a href="/wiki/Apache_Jelly" title="Apache Jelly">Jelly</a></li> <li><a href="/wiki/Apache_Commons_Logging" title="Apache Commons Logging">Logging</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Incubator</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_Taverna" title="Apache Taverna">Taverna</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other projects</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/Apache_Batik" title="Apache Batik">Batik</a></li> <li><a href="/wiki/Apache_FOP_(Formatting_Objects_Processor)" class="mw-redirect" title="Apache FOP (Formatting Objects Processor)">FOP</a></li> <li><a href="/wiki/Apache_Ivy" title="Apache 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 href="/wiki/Apache_Harmony" title="Apache Harmony">Harmony</a></li> <li><a href="/wiki/Jakarta_Project" title="Jakarta Project">Jakarta</a></li> <li><a href="/wiki/Apache_Marmotta" title="Apache Marmotta">Marmotta</a></li> <li><a href="/wiki/Apache_MXNet" title="Apache MXNet">MXNet</a></li> <li><a href="/wiki/Apache_ODE" title="Apache ODE">ODE</a></li> <li><a href="/wiki/Jini" title="Jini">River</a></li> <li><a href="/wiki/Apache_Shale" title="Apache Shale">Shale</a></li> <li><a href="/wiki/Jakarta_Slide" class="mw-redirect" title="Jakarta Slide">Slide</a></li> <li><a href="/wiki/Sqoop" title="Sqoop">Sqoop</a></li> <li><a href="/wiki/Apache_Stanbol" title="Apache Stanbol">Stanbol</a></li> <li><a href="/wiki/Apache_Tuscany" class="mw-redirect" title="Apache Tuscany">Tuscany</a></li> <li><a href="/wiki/Apache_Wave" class="mw-redirect" title="Apache Wave">Wave</a></li> <li><a href="/wiki/Apache_XML" title="Apache XML">XML</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Licenses</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/Apache_License" title="Apache License">Apache 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