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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 class="no_toc" id="freemarker">FreeMarker</h1> + +<ul id="markdown-toc"> + <li><a href="#getting-started" id="markdown-toc-getting-started">Getting Started</a></li> + <li><a href="#servlet--jsp-scoped-objects" id="markdown-toc-servlet--jsp-scoped-objects">Servlet / JSP Scoped Objects</a> <ul> + <li><a href="#application-scope-attribute" id="markdown-toc-application-scope-attribute">Application Scope Attribute</a></li> + <li><a href="#session-scope-attribute" id="markdown-toc-session-scope-attribute">Session Scope Attribute</a></li> + <li><a href="#request-scope-attribute" id="markdown-toc-request-scope-attribute">Request Scope Attribute</a></li> + <li><a href="#request-parameter" id="markdown-toc-request-parameter">Request Parameter</a></li> + <li><a href="#context-parameter" id="markdown-toc-context-parameter">Context parameter</a></li> + </ul> + </li> + <li><a href="#template-loading" id="markdown-toc-template-loading">Template Loading</a></li> + <li><a href="#variable-resolution" id="markdown-toc-variable-resolution">Variable Resolution</a></li> + <li><a href="#tag-support" id="markdown-toc-tag-support">Tag Support</a></li> + <li><a href="#tips-and-tricks" id="markdown-toc-tips-and-tricks">Tips and Tricks</a> <ul> + <li><a href="#type-conversion-and-locales" id="markdown-toc-type-conversion-and-locales">Type Conversion and Locales</a></li> + <li><a href="#extending" id="markdown-toc-extending">Extending</a></li> + <li><a href="#objectwrapper-settings" id="markdown-toc-objectwrapper-settings">ObjectWrapper Settings</a></li> + <li><a href="#syntax-notes" id="markdown-toc-syntax-notes">Syntax Notes</a></li> + <li><a href="#cache" id="markdown-toc-cache">Cache</a></li> + <li><a href="#incompatible-improvements" id="markdown-toc-incompatible-improvements">Incompatible Improvements</a></li> + </ul> + </li> +</ul> + +<p>FreeMarker is a Java-based template engine that is a great alternative to <a href="jsp.html">JSP</a>. FreeMarker is ideal for situations +where your action results can possibly be loaded from outside a Servlet container. For example, if you wished to support +plugins in your application, you might wish to use FreeMarker so that the plugins could provide the entire action class +and view in a single jar that is loaded from the classloader.</p> + +<p>For more information on FreeMarker itself, please visit the <a href="http://freemarker.org/";>FreeMarker website</a>.</p> + +<blockquote> + <p>The framework utilizes FreeMarker because the engine includes strong error reporting, built-in internationalization +and powerful macro libraries.</p> +</blockquote> + +<blockquote> + <p>Support is also included for <a href="velocity.html">Velocity</a> templates. For a comparison of Velocity vs FreeMarker +see <a href="http://freemarker.org/fmVsVel.html";>here</a>.</p> +</blockquote> + +<h2 id="getting-started">Getting Started</h2> + +<p>Getting started with FreeMarker is as simple as ensuring all the dependencies are included in your projectâs classpath. +Typically, the only dependency is <code class="highlighter-rouge">freemarker.jar</code>. Other than that, <code class="highlighter-rouge">struts-default.xml</code> already configures +the <code class="highlighter-rouge">FreeMarker Result</code> needed to process your applicationâs templates.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="nt"><action</span> <span class="na">name=</span><span class="s">"test"</span> <span class="na">class=</span><span class="s">"com.acme.TestAction"</span><span class="nt">></span> + <span class="nt"><result</span> <span class="na">name=</span><span class="s">"success"</span> <span class="na">type=</span><span class="s">"freemarker"</span><span class="nt">></span>test-success.ftl<span class="nt"></result></span> +<span class="nt"></action></span> +</code></pre> +</div> + +<p>Then in <code class="highlighter-rouge">test-success.ftl</code>:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="nt"><html></span> +<span class="nt"><head></span> + <span class="nt"><title></span>Hello<span class="nt"></title></span> +<span class="nt"></head></span> +<span class="nt"><body></span> + +Hello, ${name} + +<span class="nt"></body></span> +<span class="nt"></html></span> +</code></pre> +</div> + +<p>Where <code class="highlighter-rouge">name</code> is a property on your action. Thatâs it! Read the rest of this document for details on how templates +are loaded, variables are resolved, and tags can be used.</p> + +<h2 id="servlet--jsp-scoped-objects">Servlet / JSP Scoped Objects</h2> + +<p>The following are ways to obtained Application scope attributes, Session scope attributes, Request scope attributes, +Request parameters, and framework Context scope parameters.</p> + +<h3 id="application-scope-attribute">Application Scope Attribute</h3> + +<p>Assuming thereâs an attribute with name <code class="highlighter-rouge">myApplicationAttribute</code> in the Application scope.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>#if Application.myApplicationAttribute?exists> + ${Application.myApplicationAttribute} +<span class="err"><</span>/#if> +</code></pre> +</div> + +<p>or</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>@s.property value="%{#application.myApplicationAttribute}" /> +</code></pre> +</div> + +<h3 id="session-scope-attribute">Session Scope Attribute</h3> + +<p>Assuming thereâs an attribute with name <code class="highlighter-rouge">mySessionAttribute</code> in the Session scope.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>#if Session.mySessionAttribute?exists> + ${Session.mySessionAttribute} +<span class="err"><</span>/#if> +</code></pre> +</div> + +<p>or</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>@s.property value="%{#session.mySessionAttribute}" /> +</code></pre> +</div> + +<h3 id="request-scope-attribute">Request Scope Attribute</h3> + +<p>Assuming thereâs an attribute with name <code class="highlighter-rouge">myRequestAttribute</code> in the Request scope.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>#if Request.myRequestAttribute?exists> + ${Request.myRequestAttribute} +<span class="err"><</span>/#if> +</code></pre> +</div> + +<p>or</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>@s.property value="%{#request.myRequestAttribute}" /> +</code></pre> +</div> + +<h3 id="request-parameter">Request Parameter</h3> + +<p>Assuming thereâs a request parameter <code class="highlighter-rouge">myParameter</code> (eg. [http://host/myApp/myAction.action?myParameter=one]).</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>#if Parameters.myParameter?exists> + ${Parameters.myParameter} +<span class="err"><</span>/#if> +</code></pre> +</div> + +<p>or</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>@s.property value="%{#parameters.myParameter}" /> +</code></pre> +</div> + +<h3 id="context-parameter">Context parameter</h3> + +<p>Assuming thereâs a parameter with the name <code class="highlighter-rouge">myContextParam</code> in framework context.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>~~~~~~~ +${stack.findValue('#myContextParam')} +</code></pre> +</div> + +<p>or</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>@s.property value="%{#myContextParam}" /> +</code></pre> +</div> + +<h2 id="template-loading">Template Loading</h2> + +<p>The framework looks for FreeMarker templates in two locations (in this order):</p> + +<ol> + <li>Web application</li> + <li>Class path</li> +</ol> + +<p>This ordering makes it ideal for providing templates inside a fully-built jar, but allowing for overrides of those +templates to be defined in your web application. In fact, this is how you can override the default UI tags +and <a href="form-tags.html">Form Tags</a> included with the framework.</p> + +<p>In addition, you can specify a location (directory on your file system) through the <code class="highlighter-rouge">templatePath</code> or <code class="highlighter-rouge">TemplatePath</code> +context variable (in the <code class="highlighter-rouge">web.xml</code>). If a variable is specified, the content of the directory it points to will be +searched first.</p> + +<blockquote> + <p>This variable is currently NOT relative to the root of your application.</p> +</blockquote> + +<h2 id="variable-resolution">Variable Resolution</h2> + +<p>When using FreeMarker with the framework, variables are looked up in several different places, in this order:</p> + +<ol> + <li>Built-in variables</li> + <li>Value stack</li> + <li>Action context</li> + <li>Request scope</li> + <li>Session scope</li> + <li>Application scope</li> +</ol> + +<p>Note that the action context is looked up after the value stack. This means that you can reference the variable without +the typical preceding hash marker (<code class="highlighter-rouge">#</code>) like you would have to when using the JSP <code class="highlighter-rouge">s:property</code> tag. This is a nice +convenience, though be careful because there is a small chance it could trip you up.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>@s.url id="url" value="http://www.yahoo.com"/> +Click <span class="nt"><a</span> <span class="na">href=</span><span class="s">"${url}"</span><span class="nt">></span>here<span class="nt"></a></span>! +</code></pre> +</div> + +<p>The built-in variables that Struts-FreeMarker integration provides are:</p> + +<table> + <thead> + <tr> + <th>Name</th> + <th>Description</th> + </tr> + </thead> + <tbody> + <tr> + <td>stack</td> + <td>The value stack itself, useful for calls like <code class="highlighter-rouge">${stack.findString('ognl expr')}</code></td> + </tr> + <tr> + <td>action</td> + <td>The action most recently executed</td> + </tr> + <tr> + <td>response</td> + <td>The HttpServletResponse</td> + </tr> + <tr> + <td>res</td> + <td>Same as response</td> + </tr> + <tr> + <td>request</td> + <td>The HttpServletRequest</td> + </tr> + <tr> + <td>req</td> + <td>Same as request</td> + </tr> + <tr> + <td>session</td> + <td>The HttpSession</td> + </tr> + <tr> + <td>application</td> + <td>The ServletContext</td> + </tr> + <tr> + <td>base</td> + <td>The requestâs context path</td> + </tr> + </tbody> +</table> + +<h2 id="tag-support">Tag Support</h2> + +<p>FreeMarker includes complete tag support. See the <a href="freemarker-tags.html">FreeMarker Tags</a> documentation for information +on how to use the generic <a href="struts-tags.html">Struts Tags</a> provided by Struts. In addition to this, you can use any JSP tag, +like so:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="err"><</span>#assign mytag=JspTaglibs["/WEB-INF/mytag.tld"]> +<span class="err"><</span>@mytag.tagx attribute1="some ${value}"/> +</code></pre> +</div> + +<p>Where <strong>mytag.tld</strong> is the JSP Tag Library Definition file for your tag library. Note: in order to use this support +in FreeMarker, you must enable the <code class="highlighter-rouge">JSPSupportServlet</code> in <code class="highlighter-rouge">web.xml</code>:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="nt"><servlet></span> + <span class="nt"><servlet-name></span>JspSupportServlet<span class="nt"></servlet-name></span> + <span class="nt"><servlet-class></span>org.apache.struts2.views.JspSupportServlet<span class="nt"></servlet-class></span> + <span class="nt"><load-on-startup></span>1<span class="nt"></load-on-startup></span> +<span class="nt"></servlet></span> +</code></pre> +</div> + +<h2 id="tips-and-tricks">Tips and Tricks</h2> + +<p>There are some advanced features that may be useful when building Struts applications with FreeMarker.</p> + +<h3 id="type-conversion-and-locales">Type Conversion and Locales</h3> + +<p>FreeMarker has built in support for formatting dates and numbers. The formatting rules are based on the locale associated +with the action request, which is by default set in <code class="highlighter-rouge">struts.properties</code> but can be over-ridden using the <code class="highlighter-rouge">I18n Interceptor</code>. +This is normally perfect for your needs, but it is important to remember that these formatting rules are handled +by FreeMarker and not by the frameworkâs <em>Type Conversion</em> support.</p> + +<p>If you want the framework to handle the formatting according to the <em>Type Conversion</em> you have specified, you shouldnât +use the normal <code class="highlighter-rouge">${...}</code> syntax. Instead, you should use the <a href="property-tag.html">property</a> tag. The difference is that +the <code class="highlighter-rouge">property</code> tag is specifically designed to take an <a href="ognl.html">OGNL</a> expression, evaluate it, and then convert it +to a String using any <em>Type Conversion</em> rules you have specified. The normal <code class="highlighter-rouge">${...}</code> syntax will use a FreeMarker +expression language, evaluate it, and then convert it to a String using the built in formatting rules.</p> + +<blockquote> + <p>The difference in how type conversion is handled under Freemarker is subtle but important to understand.</p> +</blockquote> + +<h3 id="extending">Extending</h3> + +<p>Sometimes you may with to extend the frameworkâs FreeMarker support. For example, you might want to extend the Struts +tags that come bundled with the framework.</p> + +<p>To extend the Freemarker support, develop a class that extends <code class="highlighter-rouge">org.apache.struts2.views.freemarker.FreemarkerManager</code>, +overriding methods as needed, and plugin the class through the <code class="highlighter-rouge">struts.xml</code>:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><constant name="struts.freemarker.manager.classname" value="com.yourcompany.YourFreeMarkerManager" /> +</code></pre> +</div> + +<h3 id="objectwrapper-settings">ObjectWrapper Settings</h3> + +<p>Once you get familiar with FreeMarker, you will find certain <em>subtleties</em> with it that may become frustrating. +The most common thing youâll likely run in to is the <code class="highlighter-rouge">BeansWrapper</code> provided by FreeMarker. If you donât know what this +is, donât worry. However, if you do, know this:</p> + +<p>The <code class="highlighter-rouge">StrutsBeanWrapper</code> extends the default FreeMarker <code class="highlighter-rouge">BeansWrapper</code> and provides almost no change in functionality, +<strong>except</strong> for how it handles maps. Normally, FreeMarker has two modes of operation: either support for friendly +map built-ins (<code class="highlighter-rouge">?keys</code>, <code class="highlighter-rouge">?values</code>, etc) but only support for String keys; OR no special built-in support (ie: <code class="highlighter-rouge">?keys</code> +returns the methods on the map instead of the keys) but support for String and non-String keys alike. Struts +provides an alternative implementation that gives us the best of both worlds.</p> + +<p>It is possible that this special behavior may be confusing or can cause problems. Therefore, you can set the +<code class="highlighter-rouge">struts.freemarker.wrapper.altMap</code> property in <code class="highlighter-rouge">struts.xml</code> to false, allowing the normal BeansWrapper +logic to take place instead.</p> + +<h3 id="syntax-notes">Syntax Notes</h3> + +<p>As of FreeMarker 2.3.4, an alternative syntax is supported. This alternative syntax is great if you find that your IDE +(especially IntelliJ IDEA) makes it difficult to work with the default syntax. You can read more about this syntax + <a href="http://freemarker.org/docs/dgui_misc_alternativesyntax.html";>here</a>.</p> + +<h3 id="cache">Cache</h3> + +<p>You can enable FreeMarker cache mechanism by specifying below options in <code class="highlighter-rouge">struts.xml</code>:</p> + +<ul> + <li><code class="highlighter-rouge"><constant name="struts.freemarker.mru.max.strong.size" value="250" /></code> - this option will be used +by <a href="http://freemarker.org/docs/api/freemarker/cache/MruCacheStorage.html";>freemarker.cache.MruCacheStorage</a></li> + <li><code class="highlighter-rouge"><constant name="struts.freemarker.templatesCache.updateDelay" value="1800" /></code> - default update cache interval (5 seconds) +-<code class="highlighter-rouge"><constant name="struts.freemarker.templatesCache" value="true" /></code> - *<strong>DEPRECATED</strong>* this option will use a internal +ConcurrentHashMap in FreemarkerTemplateEngine but not freemarker native cache</li> +</ul> + +<p>Setting <code class="highlighter-rouge">devMode</code> to <code class="highlighter-rouge">true</code> will disable cache and updateDelay immediately, but you can explicit specify these constants +to enable cache even in <code class="highlighter-rouge">devMode</code>, see <a href="../core-developers/development-mode.html">devMode</a>.</p> + +<h3 id="incompatible-improvements">Incompatible Improvements</h3> + +<p>By default Struts is using FreeMarker in way to be backward compatible as much as possible but if you need to enable new +features you can do it via <code class="highlighter-rouge">freemarker.properties</code> by defining +<a href="http://freemarker.org/docs/pgui_config_incompatible_improvements.html#pgui_config_incompatible_improvements_how_to_set";>incompatible improvements</a> +settings, ie.:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>incompatible_improvements=2.3.22 +</code></pre> +</div> + +<p>You can also pass this setting via <code class="highlighter-rouge">ServletContext</code> setting <code class="highlighter-rouge"><init-param/></code> (since Struts 2.5.13):</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="nt"><init-param></span> + <span class="nt"><param-name></span>freemarker.incompatible_improvements<span class="nt"></param-name></span> + <span class="nt"><param-value></span>2.3.22<span class="nt"></param-value></span> +<span class="nt"></init-param></span> +</code></pre> +</div> + +<p>This can impact your freemarker powered pages and Struts tags as well, so please careful test this change.</p> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; + if (!d.getElementById(id)) { + js = d.createElement(s); + js.id = id; + js.src = "//platform.twitter.com/widgets.js"; + fjs.parentNode.insertBefore(js, fjs); + } +}(document, "script", "twitter-wjs");</script> +<script src="https://apis.google.com/js/platform.js"; async="async" defer="defer"></script> + +<div id="fb-root"></div> + +<script>(function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; + if (d.getElementById(id)) return; + js = d.createElement(s); + js.id = id; + js.src = "//connect.facebook.net/en_GB/all.js#xfbml=1"; + fjs.parentNode.insertBefore(js, fjs); +}(document, 'script', 'facebook-jssdk'));</script> + + +<script> +$(function() { + return $("h2, h3, h4, h5, h6").each(function(i, el) { + var $el, id; + $el = $(el); + id = $el.attr('id'); + if (id) { + $el.removeAttr('id'); + return $el.before($("<a />").addClass('anchor').attr('name', id)); + } + }); +}); +</script> + +</body> +</html>
http://git-wip-us.apache.org/repos/asf/struts-site/blob/2b2ec9b3/content/tag-developers/generator-tag.html ---------------------------------------------------------------------- diff --git a/content/tag-developers/generator-tag.html b/content/tag-developers/generator-tag.html new file mode 100644 index 0000000..f7afbc5 --- /dev/null +++ b/content/tag-developers/generator-tag.html @@ -0,0 +1,203 @@ +<!DOCTYPE html> +<html lang="en"> +<head> + <meta charset="UTF-8"/> + <meta name="viewport" content="width=device-width, initial-scale=1.0"/> + <meta name="Date-Revision-yyyymmdd" content="20140918"/> + <meta http-equiv="Content-Language" content="en"/> + <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> + + <title>Tag Developers Guide (WIP)</title> + + <link href="//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600,700,400italic,600italic,700italic" rel="stylesheet" type="text/css"> + <link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet"> + <link href="/css/main.css" rel="stylesheet"> + <link href="/css/custom.css" rel="stylesheet"> + <link href="/highlighter/github-theme.css" rel="stylesheet"> + + <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script> + <script type="text/javascript" src="/bootstrap/js/bootstrap.js"></script> + <script type="text/javascript" src="/js/community.js"></script> +</head> +<body> + +<a href="http://github.com/apache/struts"; 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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 id="generator">generator</h1> + +<p><strong>Description</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=javadoc|javadoc=true|url=org.apache.struts2.views.jsp.iterator.IteratorGeneratorTag</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>Parameters</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=tagattributes|javadoc=false|url=struts2-tags/generator.html</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>Examples</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=example|lang=xml|javadoc=true|url=org.apache.struts2.views.jsp.iterator.IteratorGeneratorTag</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; 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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 id="generic-tag-reference">Generic Tag Reference</h1> + +<p>Struts Generic Tags control the execution flow as pages render.</p> + +<h2 id="control-tags">Control Tags</h2> + +<p>Controls tags provide the ability to manipulate collections and conditionally produce content.</p> + +<blockquote> + <p>Please make sure you have read the <a href="tag-syntax.html">Tag Syntax</a> document and understand how tag attribute syntax works.</p> +</blockquote> + +<ul> + <li><a href="if-tag.html">if</a></li> + <li><a href="elseif-tag.html">elseif</a></li> + <li><a href="else-tag.html">else</a></li> + <li><a href="append-tag.html">append</a></li> + <li><a href="generator-tag.html">generator</a></li> + <li><a href="iterator-tag.html">iterator</a></li> + <li><a href="merge-tag.html">merge</a></li> + <li><a href="sort-tag.html">sort</a></li> + <li><a href="subset-tag.html">subset</a></li> +</ul> + +<h2 id="data-tags">Data Tags</h2> + +<ul> + <li><a href="a-tag.html">a</a></li> + <li><a href="action-tag.html">action</a></li> + <li><a href="bean-tag.html">bean</a></li> + <li><a href="date-tag.html">date</a></li> + <li><a href="debug-tag.html">debug</a></li> + <li><a href="i18n-tag.html">i18n</a></li> + <li><a href="include-tag.html">include</a></li> + <li><a href="param-tag.html">param</a></li> + <li><a href="property-tag.html">property</a></li> + <li><a href="push-tag.html">push</a></li> + <li><a href="set-tag.html">set</a></li> + <li><a href="text-tag.html">text</a></li> + <li><a href="url-tag.html">url</a></li> +</ul> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; 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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 id="generic-tags">Generic Tags</h1> + +<p>Generic tags are used for controlling the execution flow when the pages render. These tags also allow for data extraction +from places other than your action or the value stack, such as <em>Localization</em> , JavaBeans, and including additional URLs +or action executions.</p> + +<ul> + <li>Control Tags provide control flow, such as <code class="highlighter-rouge">if</code>, <code class="highlighter-rouge">else</code>, and <code class="highlighter-rouge">iterator</code></li> + <li>Data Tags allow for data manipulation or creation, such as <code class="highlighter-rouge">bean</code>, <code class="highlighter-rouge">push</code>, and <code class="highlighter-rouge">i18n</code></li> +</ul> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; 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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 id="i18n">i18n</h1> + +<p>Please make sure you have read the <a href="#PAGE_13927">Tag Syntax</a> document and understand how tag attribute syntax works.</p> + +<table> + <tbody> + <tr> + </tr> + </tbody> +</table> + +<p><strong>Description</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=javadoc|javadoc=true|url=org.apache.struts2.components.I18n</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>Parameters</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=tagattributes|javadoc=false|url=struts2-tags/i18n.html</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>Examples</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=example|lang=xml|javadoc=true|url=org.apache.struts2.components.I18n</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; 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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 id="if">if</h1> + +<p>Please make sure you have read the <a href="#PAGE_13927">Tag Syntax</a> document and understand how tag attribute syntax works.</p> + +<table> + <tbody> + <tr> + </tr> + </tbody> +</table> + +<p><strong>Description</strong></p> + +<p>Perform basic condition flow. âIfâ tag could be used by itself or can be followed by zero or more âElse ifâ Tags followed by zero or one âElseâ Tag.</p> + +<p><strong>Parameters</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=tagattributes|javadoc=false|url=struts2-tags/if.html</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>Examples</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=example|lang=xml|javadoc=true|url=struts2/core/src/main/java/org/apache/struts2/components/If.java</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; 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title="Edit this page on GitHub">Edit on GitHub</a> + <h1 id="include">include</h1> + +<p>Please make sure you have read the <a href="#PAGE_13927">Tag Syntax</a> document and understand how tag attribute syntax works.</p> + +<table> + <tbody> + <tr> + </tr> + </tbody> +</table> + +<p><strong>Description</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=javadoc|javadoc=true|url=org.apache.struts2.components.Include</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>(!) How To access parameters</strong></p> + +<blockquote> + +</blockquote> + +<blockquote> + +</blockquote> + +<blockquote> + <p>Parameters are passed as request parameters, so use the ${param.ParamName} notation to access them. Do not use the <strong>property</strong> tag to access parameters in included files.</p> +</blockquote> + +<blockquote> + +</blockquote> + +<p><strong>Parameters</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=tagattributes|javadoc=false|url=struts2-tags/include.html</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<p><strong>Example</strong></p> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=example|lang=java|javadoc=true|url=org.apache.struts2.components.Include</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + +<div class="highlighter-rouge"><pre class="highlight"><code><span class="p">{</span><span class="err">snippet:id=exampledescription|lang=none|javadoc=true|url=org.apache.struts2.components.Include</span><span class="p">}</span><span class="w"> +</span></code></pre> +</div> + + </section> +</article> + + +<footer class="container"> + <div class="col-md-12"> + Copyright © 2000-2016 <a href="http://www.apache.org/";>The Apache Software Foundation </a>. + All Rights Reserved. + </div> + <div class="col-md-12"> + Apache Struts, Struts, Apache, the Apache feather logo, and the Apache Struts project logos are + trademarks of The Apache Software Foundation. + </div> + <div class="col-md-12">Logo and website design donated by <a href="https://softwaremill.com/";>SoftwareMill</a>.</div> +</footer> + +<script>!function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; + if (!d.getElementById(id)) { + js = d.createElement(s); + js.id = id; + js.src = "//platform.twitter.com/widgets.js"; + fjs.parentNode.insertBefore(js, fjs); + } +}(document, "script", "twitter-wjs");</script> +<script src="https://apis.google.com/js/platform.js"; async="async" defer="defer"></script> + +<div id="fb-root"></div> + +<script>(function (d, s, id) { + var js, fjs = d.getElementsByTagName(s)[0]; + if (d.getElementById(id)) return; + js = d.createElement(s); + js.id = id; + js.src = "//connect.facebook.net/en_GB/all.js#xfbml=1"; + fjs.parentNode.insertBefore(js, fjs); +}(document, 'script', 'facebook-jssdk'));</script> + + +<script> +$(function() { + return $("h2, h3, h4, h5, h6").each(function(i, el) { + var $el, id; + $el = $(el); + id = $el.attr('id'); + if (id) { + $el.removeAttr('id'); + return $el.before($("<a />").addClass('anchor').attr('name', id)); + } + }); +}); +</script> + +</body> +</html>
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