This is an automated email from the ASF dual-hosted git repository.
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in repository https://gitbox.apache.org/repos/asf/struts-site.git
The following commit(s) were added to refs/heads/asf-site by this push:
new 09967c6 Updates production by Jenkins
09967c6 is described below
commit 09967c611882532c1a293c79a2f23835e5d21c12
Author: jenkins <bui...@apache.org>
AuthorDate: Wed May 15 13:31:10 2019 +0000
Updates production by Jenkins
---
content/plugins/json/index.html | 2 +-
content/plugins/json/json-validation.html | 701 ++++++++++++++++++++++++
content/plugins/json/struts2-ajax-vali-flow.png | Bin 0 -> 54364 bytes
3 files changed, 702 insertions(+), 1 deletion(-)
diff --git a/content/plugins/json/index.html b/content/plugins/json/index.html
index 8f0241f..e26ba9a 100644
--- a/content/plugins/json/index.html
+++ b/content/plugins/json/index.html
@@ -203,7 +203,7 @@ The <code class="highlighter-rouge">setArray</code> method
can take as parameter
<p><code class="highlighter-rouge">root</code> attribute must be set on the
<code class="highlighter-rouge">JSONInterceptor</code> when dealing with JSON
array.</p>
-<p>This plugin also provides <em>AJAX Validation</em>.</p>
+<p>This plugin also provides <a href="json-validation">JSON Validation</a>.</p>
<h2 id="installation">Installation</h2>
diff --git a/content/plugins/json/json-validation.html
b/content/plugins/json/json-validation.html
new file mode 100644
index 0000000..ad77fd0
--- /dev/null
+++ b/content/plugins/json/json-validation.html
@@ -0,0 +1,701 @@
+<!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>JSON Ajax validation</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="//code.jquery.com/jquery-1.11.0.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"; class="github-ribbon">
+ <img style="position: absolute; right: 0; border: 0;"
src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png";
alt="Fork me on GitHub">
+</a>
+
+<header>
+ <nav>
+ <div role="navigation" class="navbar navbar-default navbar-fixed-top">
+ <div class="container">
+ <div class="navbar-header">
+ <button type="button" data-toggle="collapse"
data-target="#struts-menu" class="navbar-toggle">
+ Menu
+ <span class="sr-only">Toggle navigation</span>
+ <span class="icon-bar"></span>
+ <span class="icon-bar"></span>
+ <span class="icon-bar"></span>
+ </button>
+ <a href="/index.html" class="navbar-brand logo"><img
src="/img/struts-logo.svg"></a>
+ </div>
+ <div id="struts-menu" class="navbar-collapse collapse">
+ <ul class="nav navbar-nav">
+ <li class="dropdown">
+ <a data-toggle="dropdown" href="#" class="dropdown-toggle">
+ Home<b class="caret"></b>
+ </a>
+ <ul class="dropdown-menu">
+ <li><a href="/index.html">Welcome</a></li>
+ <li><a href="/download.cgi">Download</a></li>
+ <li><a href="/releases.html">Releases</a></li>
+ <li><a href="/announce.html">Announcements</a></li>
+ <li><a href="http://www.apache.org/licenses/";>License</a></li>
+ <li><a
href="https://www.apache.org/foundation/thanks.html";>Thanks!</a></li>
+ <li><a
href="https://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li>
+ </ul>
+ </li>
+ <li class="dropdown">
+ <a data-toggle="dropdown" href="#" class="dropdown-toggle">
+ Support<b class="caret"></b>
+ </a>
+ <ul class="dropdown-menu">
+ <li><a href="/mail.html">User Mailing List</a></li>
+ <li><a href="https://issues.apache.org/jira/browse/WW";>Issue
Tracker</a></li>
+ <li><a href="/security.html">Reporting Security Issues</a></li>
+ <li class="divider"></li>
+ <li><a
href="https://cwiki.apache.org/confluence/display/WW/Migration+Guide";>Version
Notes</a></li>
+ <li><a
href="https://cwiki.apache.org/confluence/display/WW/Security+Bulletins";>Security
Bulletins</a></li>
+ <li class="divider"></li>
+ <li><a href="/maven/project-info.html">Maven Project
Info</a></li>
+ <li><a href="/maven/struts2-core/dependencies.html">Struts
Core Dependencies</a></li>
+ <li><a href="/maven/struts2-plugins/modules.html">Plugin
Dependencies</a></li>
+ </ul>
+ </li>
+ <li class="dropdown">
+ <a data-toggle="dropdown" href="#" class="dropdown-toggle">
+ Documentation<b class="caret"></b>
+ </a>
+ <ul class="dropdown-menu">
+ <li><a href="/birdseye.html">Birds Eye</a></li>
+ <li><a href="/primer.html">Key Technologies</a></li>
+ <li><a href="/kickstart.html">Kickstart FAQ</a></li>
+ <li><a
href="https://cwiki.apache.org/confluence/display/WW/Home";>Wiki</a></li>
+ <li class="divider"></li>
+ <li><a href="/getting-started/">Getting Started</a></li>
+ <li><a href="/security/">Security Guide</a></li>
+ <li><a href="/core-developers/">Core Developers Guide</a></li>
+ <li><a href="/tag-developers/">Tag Developers Guide</a></li>
+ <li><a href="/maven-archetypes/">Maven Archetypes</a></li>
+ <li><a href="/plugins/">Plugins</a></li>
+ <li><a href="/maven/struts2-core/apidocs/index.html">Struts
Core API</a></li>
+ <li><a href="/tag-developers/tag-reference.html">Tag
reference</a></li>
+ <li><a
href="https://cwiki.apache.org/confluence/display/WW/FAQs";>FAQs</a></li>
+ <li><a
href="http://cwiki.apache.org/S2PLUGINS/home.html";>Plugin registry</a></li>
+ </ul>
+ </li>
+ <li class="dropdown">
+ <a data-toggle="dropdown" href="#" class="dropdown-toggle">
+ Contributing<b class="caret"></b>
+ </a>
+ <ul class="dropdown-menu">
+ <li><a href="/youatstruts.html">You at Struts</a></li>
+ <li><a href="/helping.html">How to Help FAQ</a></li>
+ <li><a href="/dev-mail.html">Development Lists</a></li>
+ <li class="divider"></li>
+ <li><a href="/submitting-patches.html">Submitting
patches</a></li>
+ <li><a href="/builds.html">Source Code and Builds</a></li>
+ <li><a href="/coding-standards.html">Coding standards</a></li>
+ <li><a
href="https://cwiki.apache.org/confluence/display/WW/Contributors+Guide";>Contributors
Guide</a></li>
+ <li class="divider"></li>
+ <li><a href="/release-guidelines.html">Release
Guidelines</a></li>
+ <li><a href="/bylaws.html">PMC Charter</a></li>
+ <li><a href="/volunteers.html">Volunteers</a></li>
+ <li><a
href="https://gitbox.apache.org/repos/asf?p=struts.git";>Source
Repository</a></li>
+ </ul>
+ </li>
+ <li class="apache"><a href="http://www.apache.org/";><img
src="/img/apache.png"></a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ </nav>
+</header>
+
+
+<article class="container">
+ <section class="col-md-12">
+ <a href="../" title="back to Plugins"><< back to Plugins</a>
+ <a class="edit-on-gh"
href="https://github.com/apache/struts-site/edit/master/source/plugins/json/json-validation.md";
title="Edit this page on GitHub">Edit on GitHub</a>
+ <h1 class="no_toc" id="json-ajax-validation">JSON Ajax Validation</h1>
+
+<ul id="markdown-toc">
+ <li><a href="#description" id="markdown-toc-description">Description</a></li>
+ <li><a href="#example" id="markdown-toc-example">Example</a> <ul>
+ <li><a href="#create-the-action-class"
id="markdown-toc-create-the-action-class">Create the action class</a></li>
+ <li><a href="#map-the-action" id="markdown-toc-map-the-action">Map the
Action</a></li>
+ <li><a href="#create-the-jsp" id="markdown-toc-create-the-jsp">Create
the JSP</a></li>
+ <li><a href="#custom-theme" id="markdown-toc-custom-theme">Custom
Theme</a> <ul>
+ <li><a href="#themeproperties"
id="markdown-toc-themeproperties">theme.properties</a></li>
+ <li><a href="#actionerrorftl"
id="markdown-toc-actionerrorftl">actionerror.ftl</a></li>
+ <li><a href="#controlfooterftl"
id="markdown-toc-controlfooterftl">controlfooter.ftl</a></li>
+ <li><a href="#controlheader-coreftl"
id="markdown-toc-controlheader-coreftl">controlheader-core.ftl</a></li>
+ </ul>
+ </li>
+ <li><a href="#css" id="markdown-toc-css">CSS</a></li>
+ <li><a href="#javascript"
id="markdown-toc-javascript">JavaScript</a></li>
+ <li><a href="#how-it-works" id="markdown-toc-how-it-works">How it
works</a></li>
+ <li><a href="#jsonvalidationinterceptor-parameters"
id="markdown-toc-jsonvalidationinterceptor-parameters">JSONValidationInterceptor
parameters</a></li>
+ </ul>
+ </li>
+ <li><a href="#flow-chart-of-ajax-validation"
id="markdown-toc-flow-chart-of-ajax-validation">Flow chart of AJAX
validation</a></li>
+</ul>
+
+<h2 id="description">Description</h2>
+
+<p>Struts provides <a
href="../../core-developers/client-side-validation">client side validation</a>
(using JavaScript) for a few validators. Using AJAX
+validation, all <em>validators</em> available to the application on the server
side can be used without forcing the page to reload, just to show
+validation errors. AJAX validation has a server side, which is in included in
<a href="index">JSON Plugin</a> (an interceptor and a result). Client
+side must be handled by applications themself. One reason for that is there
are too many JavaScript frameworks and libraries. Struts has
+no preference which of them you use. Previous versions of Struts included a
client side which was relying on the Dojo JS framework and was
+located in Struts Dojo plugin. That has been deprecated for a long time and
was eventually removed.</p>
+
+<h2 id="example">Example</h2>
+
+<p>This example is taken from the Struts showcase application.</p>
+
+<h3 id="create-the-action-class">Create the action class</h3>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="kd">public</span> <span class="kd">class</span> <span
class="nc">AjaxFormSubmitAction</span> <span class="kd">extends</span> <span
class="n">ActionSupport</span> <span class="o">{</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">requiredValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">requiredStringValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">Integer</span> <span
class="n">integerValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">Date</span> <span
class="n">dateValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">emailValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">urlValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">stringLengthValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">regexValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="kd">private</span> <span class="n">String</span> <span
class="n">fieldExpressionValidatorField</span> <span class="o">=</span> <span
class="kc">null</span><span class="o">;</span>
+ <span class="nd">@Override</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">validate</span><span class="o">()</span> <span class="o">{</span>
+ <span class="k">if</span> <span class="o">(</span><span
class="n">hasFieldErrors</span><span class="o">())</span> <span
class="o">{</span>
+ <span class="n">addActionError</span><span class="o">(</span><span
class="s">"Errors present!"</span><span class="o">);</span>
+ <span class="o">}</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">Date</span> <span
class="n">getDateValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">dateValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@DateRangeFieldValidator</span><span class="o">(</span>
+ <span class="n">min</span><span class="o">=</span><span
class="s">"01/01/1990"</span><span class="o">,</span>
+ <span class="n">max</span><span class="o">=</span><span
class="s">"01/01/2000"</span><span class="o">,</span>
+ <span class="n">message</span><span class="o">=</span><span
class="s">"must be a min 01-01-1990 max 01-01-2000 if supplied"</span><span
class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setDateValidatorField</span><span class="o">(</span><span
class="n">Date</span> <span class="n">dateValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">dateValidatorField</span> <span class="o">=</span> <span
class="n">dateValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getEmailValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">emailValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@EmailValidator</span><span class="o">(</span><span
class="n">message</span><span class="o">=</span><span class="s">"must be a
valid email if supplied"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setEmailValidatorField</span><span class="o">(</span><span
class="n">String</span> <span class="n">emailValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">emailValidatorField</span> <span class="o">=</span> <span
class="n">emailValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">Integer</span> <span
class="n">getIntegerValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">integerValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@IntRangeFieldValidator</span><span
class="o">(</span><span class="n">min</span><span class="o">=</span><span
class="s">"1"</span><span class="o">,</span> <span class="n">max</span><span
class="o">=</span><span class="s">"10"</span><span class="o">,</span> <span
class="n">message</span><span class="o">=</span><span class="s">"must be
integer min 1 max 10 if supplied"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setIntegerValidatorField</span><span class="o">(</span><span
class="n">Integer</span> <span class="n">integerValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">integerValidatorField</span> <span class="o">=</span> <span
class="n">integerValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getRegexValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">regexValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@RegexFieldValidator</span><span class="o">(</span>
+ <span class="n">regex</span><span class="o">=</span><span
class="s">"[^<>]+"</span><span class="o">,</span>
+ <span class="n">message</span><span class="o">=</span><span
class="s">"regexValidatorField must match a regexp (.*\.txt) if
specified"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setRegexValidatorField</span><span class="o">(</span><span
class="n">String</span> <span class="n">regexValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">regexValidatorField</span> <span class="o">=</span> <span
class="n">regexValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getRequiredStringValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">requiredStringValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@RequiredStringValidator</span><span
class="o">(</span><span class="n">trim</span><span class="o">=</span><span
class="kc">true</span><span class="o">,</span> <span
class="n">message</span><span class="o">=</span><span class="s">"required and
must be string"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setRequiredStringValidatorField</span><span class="o">(</span><span
class="n">String</span> <span
class="n">requiredStringValidatorField</span><span class="o">)</span> <span
class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">requiredStringValidatorField</span> <span class="o">=</span> <span
class="n">requiredStringValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getRequiredValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">requiredValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@RequiredFieldValidator</span><span
class="o">(</span><span class="n">message</span><span class="o">=</span><span
class="s">"required"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setRequiredValidatorField</span><span class="o">(</span><span
class="n">String</span> <span class="n">requiredValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">requiredValidatorField</span> <span class="o">=</span> <span
class="n">requiredValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getStringLengthValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">stringLengthValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@StringLengthFieldValidator</span><span class="o">(</span>
+ <span class="n">minLength</span><span class="o">=</span><span
class="s">"2"</span><span class="o">,</span>
+ <span class="n">maxLength</span><span class="o">=</span><span
class="s">"4"</span><span class="o">,</span>
+ <span class="n">trim</span><span class="o">=</span><span
class="kc">true</span><span class="o">,</span>
+ <span class="n">message</span><span class="o">=</span><span
class="s">"must be a String of a specific greater than 1 less than 5 if
specified"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setStringLengthValidatorField</span><span class="o">(</span><span
class="n">String</span> <span class="n">stringLengthValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">stringLengthValidatorField</span> <span class="o">=</span> <span
class="n">stringLengthValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getFieldExpressionValidatorField</span><span class="o">()</span>
<span class="o">{</span>
+ <span class="k">return</span> <span
class="n">fieldExpressionValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@FieldExpressionValidator</span><span class="o">(</span>
+ <span class="n">expression</span> <span class="o">=</span> <span
class="s">"(fieldExpressionValidatorField ==
requiredValidatorField)"</span><span class="o">,</span>
+ <span class="n">message</span> <span class="o">=</span> <span
class="s">"must be the same as the Required Validator Field if
specified"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setFieldExpressionValidatorField</span><span class="o">(</span>
+ <span class="n">String</span> <span
class="n">fieldExpressionValidatorField</span><span class="o">)</span> <span
class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">fieldExpressionValidatorField</span> <span class="o">=</span> <span
class="n">fieldExpressionValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="kd">public</span> <span class="n">String</span> <span
class="n">getUrlValidatorField</span><span class="o">()</span> <span
class="o">{</span>
+ <span class="k">return</span> <span
class="n">urlValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+ <span class="nd">@UrlValidator</span><span class="o">(</span><span
class="n">message</span><span class="o">=</span><span class="s">"must be a
valid url if supplied"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">void</span> <span
class="n">setUrlValidatorField</span><span class="o">(</span><span
class="n">String</span> <span class="n">urlValidatorField</span><span
class="o">)</span> <span class="o">{</span>
+ <span class="k">this</span><span class="o">.</span><span
class="na">urlValidatorField</span> <span class="o">=</span> <span
class="n">urlValidatorField</span><span class="o">;</span>
+ <span class="o">}</span>
+<span class="o">}</span>
+</code></pre>
+</div>
+
+<h3 id="map-the-action">Map the Action</h3>
+
+<p>Note that is is not necessary when using <a
href="../convention/">Convention Plugin</a></p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="cp"><!DOCTYPE struts PUBLIC
+ "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
+ "http://struts.apache.org/dtds/struts-2.5.dtd"></span>
+
+<span class="nt"><struts></span>
+ <span class="nt"><package></span>
+ <span class="nt"><action</span> <span class="na">name=</span><span
class="s">"ajaxFormSubmit"</span> <span class="na">class=</span><span
class="s">"org.apache.struts2.showcase.validation.AjaxFormSubmitAction"</span><span
class="nt">></span>
+ <span class="nt"><interceptor-ref</span> <span
class="na">name=</span><span
class="s">"jsonValidationWorkflowStack"</span><span class="nt">/></span>
+ <span class="nt"><result</span> <span
class="na">name=</span><span class="s">"input"</span><span
class="nt">></span>/WEB-INF/validation/ajaxFormSubmit.jsp<span
class="nt"></result></span>
+ <span class="nt"><result</span> <span
class="na">type=</span><span class="s">"jsonActionRedirect"</span><span
class="nt">></span>ajaxFormSubmitSuccess<span
class="nt"></result></span>
+ <span class="nt"></action></span>
+ <span class="nt"></package></span>
+<span class="nt"></struts></span>
+</code></pre>
+</div>
+
+<p>AJAX validation is performed by the <em>jsonValidation</em> interceptor.
This interceptor is included in the <em>jsonValidationWorkflowStack</em>,
+and is required in order to perform AJAX validation. Normal results(<code
class="highlighter-rouge">input</code>, <code
class="highlighter-rouge">success</code>, etc) should be provided for the
action in the case
+that someone tries to access the action directly, in which case normal
validation will be triggered. So, how does the <em>jsonValidation</em>
+know that it must perform AJAX validation vs regular validation? We will see
that in a minute, but you don’t need to know that in order
+to use AJAX validation. Same applies for specialized Redirect Result Type
<em>jsonActionRedirect</em>.</p>
+
+<h3 id="create-the-jsp">Create the JSP</h3>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="err"><</span>%@taglib prefix="s" uri="/struts-tags" %>
+<span class="nt"><html></span>
+<span class="nt"><head></span>
+ <span class="nt"><title></span>Struts2 Showcase - Validation - AJAX
Form Submit<span class="nt"></title></span>
+ <span class="nt"><s:head</span> <span class="na">theme=</span><span
class="s">"xhtml"</span><span class="nt">/></span>
+<span class="nt"></head></span>
+<span class="nt"><body></span>
+<span class="nt"><div</span> <span class="na">class=</span><span
class="s">"page-header"</span><span class="nt">></span>
+ <span class="nt"><h1></span>AJAX Form Submit<span
class="nt"></h1></span>
+<span class="nt"></div></span>
+ <span class="nt"><h3></span>Action Errors Will Appear Here<span
class="nt"></h3></span>
+ <span class="nt"><s:actionerror</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><hr/></span>
+ <span class="nt"><s:form</span> <span class="na">method=</span><span
class="s">"POST"</span> <span class="na">theme=</span><span
class="s">"xhtml"</span><span class="nt">></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Required Validator Field"</span> <span
class="na">name=</span><span class="s">"requiredValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Required String Validator
Field"</span> <span class="na">name=</span><span
class="s">"requiredStringValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Integer Validator Field"</span> <span
class="na">name=</span><span class="s">"integerValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Date Validator Field"</span> <span
class="na">name=</span><span class="s">"dateValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Email Validator Field"</span> <span
class="na">name=</span><span class="s">"emailValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"URL Validator Field"</span> <span
class="na">name=</span><span class="s">"urlValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"String Length Validator Field"</span>
<span class="na">name=</span><span
class="s">"stringLengthValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Regex Validator Field"</span> <span
class="na">name=</span><span class="s">"regexValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:textfield</span> <span
class="na">label=</span><span class="s">"Field Expression Validator
Field"</span> <span class="na">name=</span><span
class="s">"fieldExpressionValidatorField"</span> <span
class="na">theme=</span><span class="s">"ajaxErrorContainers"</span><span
class="nt">/></span>
+ <span class="nt"><s:submit</span> <span
class="na">label=</span><span class="s">"Submit"</span> <span
class="na">cssClass=</span><span class="s">"btn btn-primary"</span><span
class="nt">/></span>
+ <span class="nt"></s:form></span>
+<span class="nt"></body></span>
+<span class="nt"></html></span>
+</code></pre>
+</div>
+
+<p>Things to note on this JSP:</p>
+
+<ul>
+ <li>The <em>form</em> tag <strong>does not</strong> have <em>validate</em>
set to <em>true</em>, which would perform client validation before the AJAX
validation.</li>
+ <li>It uses a customized theme <em>ajaxErrorContainers</em>. The default
Struts themes generate HTML-Elements to show validation errors only
+if errors are present when page is created on server side. But in order to
show validation errors that arrive later via AJAX
+it is necessary to have error-container elements in DOM always.</li>
+</ul>
+
+<p>What happens if validation succeeds? That depends on your request
parameters and action configuration. If you are using
<em>jsonActionRedirect</em>
+result mentioned above the action will be executed while AJAX request is
active and respond with JSON providing a new URL to load.
+Otherwise the AJAX response will be empty and the form must be submitted a 2nd
time but as usual request, not AJAX.</p>
+
+<blockquote>
+ <p>Setting <em>validate</em> to <em>true</em> in the <em>form</em> tag will
enable client side, JavaScript validation, which can be used along with AJAX
validation
+(runs before the AJAX validation).</p>
+</blockquote>
+
+<h3 id="custom-theme">Custom Theme</h3>
+
+<p>In this sample the <em>custom theme</em> is based on <em>xhtml</em> theme.
It is required to override 3 FTL files.</p>
+
+<h4 id="themeproperties">theme.properties</h4>
+
+<div class="highlighter-rouge"><pre class="highlight"><code>parent = xhtml
+</code></pre>
+</div>
+
+<h4 id="actionerrorftl">actionerror.ftl</h4>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="err"><</span>#--
+ Make sure element is always present. To be filled later via JS.
+-->
+<span class="nt"><ul</span><span class="err"><#</span><span
class="na">rt</span><span class="nt">/></span>
+<span class="err"><</span>#if parameters.id??>
+ id="${parameters.id?html}"<span class="err"><</span>#rt/>
+<span class="err"><</span>/#if>
+<span class="err"><</span>#if parameters.cssClass??>
+ class="${parameters.cssClass?html}"<span class="err"><</span>#rt/>
+<span class="err"><</span>#else>
+ class="errorMessage"<span class="err"><</span>#rt/>
+<span class="err"><</span>/#if>
+<span class="err"><</span>#if parameters.cssStyle??>
+ style="${parameters.cssStyle?html}"<span class="err"><</span>#rt/>
+<span class="err"><</span>/#if>
+>
+<span class="err"><</span>#if (actionErrors?? <span
class="err">&&</span> actionErrors?size > 0)>
+ <span class="err"><</span>#list actionErrors as error>
+ <span class="err"><</span>#if error??>
+ <span class="nt"><li><span></span><span
class="err"><</span>#if parameters.escape>${error!?html}<span
class="err"><</span>#else>${error!}<span
class="err"><</span>/#if><span class="nt"></span></span><span
class="err"><</span>#rt/><span class="nt"></li></span><span
class="err"><</span>#rt/>
+ <span class="err"><</span>/#if>
+ <span class="err"><</span>/#list>
+<span class="err"><</span>/#if>
+<span class="nt"></ul></span>
+</code></pre>
+</div>
+
+<h4 id="controlfooterftl">controlfooter.ftl</h4>
+
+<div class="highlighter-rouge"><pre
class="highlight"><code>${parameters.after!}<span class="err"><</span>#t/>
+ <span class="nt"></td></span><span class="err"><</span>#lt/>
+<span class="nt"></tr></span>
+<span class="err"><</span>#if (parameters.errorposition!"top") ==
'bottom'>
+<span class="err"><</span>#assign hasFieldErrors = parameters.name?? <span
class="err">&&</span> fieldErrors?? <span class="err">&&</span>
fieldErrors[parameters.name]??/>
+<span class="err"><</span>#if hasFieldErrors>
+<span class="nt"><tr</span> <span class="na">errorFor=</span><span
class="s">"${parameters.id}"</span><span class="nt">></span>
+ <span class="nt"><td</span> <span class="na">class=</span><span
class="s">"tdErrorMessage"</span> <span class="na">colspan=</span><span
class="s">"2"</span><span class="nt">></span><span
class="err"><</span>#rt/>
+ <span class="err"><</span>#if hasFieldErrors>
+ <span class="err"><</span>#list fieldErrors[parameters.name] as
error>
+ <span class="nt"><div</span> <span
class="na">class=</span><span class="s">"errorMessage"</span><span
class="nt">></span>${error?html}<span class="nt"></div></span><span
class="err"><</span>#t/>
+ <span class="err"><</span>/#list>
+ <span class="err"><</span>/#if>
+ <span class="nt"></td></span><span class="err"><</span>#lt/>
+<span class="nt"></tr></span>
+<span class="err"><</span>/#if>
+<span class="err"><</span>/#if>
+</code></pre>
+</div>
+
+<h4 id="controlheader-coreftl">controlheader-core.ftl</h4>
+
+<div class="highlighter-rouge"><pre class="highlight"><code> <span
class="err"><</span>#--
+ Always include elements to show errors. They may be filled later via AJAX.
+-->
+<span class="err"><</span>#assign hasFieldErrors = parameters.name?? <span
class="err">&&</span> fieldErrors?? <span class="err">&&</span>
fieldErrors[parameters.name]??/>
+<span class="err"><</span>#if (parameters.errorposition!"top") == 'top'>
+<span class="nt"><tr</span> <span class="na">errorFor=</span><span
class="s">"${parameters.id}"</span><span class="nt">></span>
+ <span class="nt"><td</span> <span class="na">class=</span><span
class="s">"tdErrorMessage"</span> <span class="na">colspan=</span><span
class="s">"2"</span> <span class="na">data-error-for-fieldname=</span><span
class="s">"${parameters.name}"</span><span class="nt">></span><span
class="err"><</span>#rt/>
+ <span class="err"><</span>#if hasFieldErrors>
+ <span class="err"><</span>#list fieldErrors[parameters.name] as
error>
+ <span class="nt"><div</span> <span
class="na">class=</span><span class="s">"errorMessage"</span><span
class="nt">></span>${error?html}<span class="nt"></div></span><span
class="err"><</span>#t/>
+ <span class="err"><</span>/#list>
+ <span class="err"><</span>/#if>
+ <span class="nt"></td></span><span class="err"><</span>#lt/>
+<span class="nt"></tr></span>
+<span class="err"><</span>/#if>
+<span class="err"><</span>#if !parameters.labelposition?? <span
class="err">&&</span> (parameters.form.labelposition)??>
+<span class="err"><</span>#assign labelpos =
parameters.form.labelposition/>
+<span class="err"><</span>#elseif parameters.labelposition??>
+<span class="err"><</span>#assign labelpos = parameters.labelposition/>
+<span class="err"><</span>/#if>
+<span class="err"><</span>#--
+ if the label position is top,
+ then give the label it's own row in the table
+-->
+<span class="nt"><tr></span>
+<span class="err"><</span>#if (labelpos!"") == 'top'>
+ <span class="nt"><td</span> <span class="na">class=</span><span
class="s">"tdLabelTop"</span> <span class="na">colspan=</span><span
class="s">"2"</span><span class="nt">></span><span
class="err"><</span>#rt/>
+<span class="err"><</span>#else>
+ <span class="nt"><td</span> <span class="na">class=</span><span
class="s">"tdLabel"</span><span class="nt">></span><span
class="err"><</span>#rt/>
+<span class="err"><</span>/#if>
+<span class="err"><</span>#if parameters.label??>
+ <span class="nt"><label</span> <span class="err"><#</span><span
class="na">t</span><span class="nt">/></span>
+<span class="err"><</span>#if parameters.id??>
+ for="${parameters.id?html}" <span class="err"><</span>#t/>
+<span class="err"><</span>/#if>
+<span class="err"><</span>#if hasFieldErrors>
+ class="errorLabel"<span class="err"><</span>#t/>
+<span class="err"><</span>#else>
+ class="label"<span class="err"><</span>#t/>
+<span class="err"><</span>/#if>
+ ><span class="err"><</span>#t/>
+<span class="err"><</span>#if parameters.required!false <span
class="err">&&</span> parameters.requiredPosition!"right" != 'right'>
+ <span class="nt"><span</span> <span class="na">class=</span><span
class="s">"required"</span><span class="nt">></span>*<span
class="nt"></span></span><span class="err"><</span>#t/>
+<span class="err"><</span>/#if>
+${parameters.label?html}<span class="err"><</span>#t/>
+<span class="err"><</span>#if parameters.required!false <span
class="err">&&</span> parameters.requiredPosition!"right" == 'right'>
+ <span class="nt"><span</span> <span class="na">class=</span><span
class="s">"required"</span><span class="nt">></span>*<span
class="nt"></span></span><span class="err"><</span>#t/>
+<span class="err"><</span>/#if>
+${parameters.labelseparator!":"?html}<span class="err"><</span>#t/>
+<span class="err"><</span>#include
"/${parameters.templateDir}/${parameters.expandTheme}/tooltip.ftl" />
+<span class="nt"></label></span><span class="err"><</span>#t/>
+<span class="err"><</span>/#if>
+ <span class="nt"></td></span><span class="err"><</span>#lt/>
+<span class="err"><</span>#-- add the extra row -->
+<span class="err"><</span>#if (labelpos!"") == 'top'>
+<span class="nt"></tr></span>
+<span class="nt"><tr></span>
+<span class="err"><</span>/#if>
+</code></pre>
+</div>
+
+<h3 id="css">CSS</h3>
+
+<p>To show users some nice visual feedback while waiting for AJAX response you
can use a little CSS. Remember to include the referenced
+<em>indicator.gif</em> .</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="p">.</span><span class="nx">ajaxVisualFeedback</span> <span
class="p">{</span>
+ <span class="nl">width</span><span class="p">:</span> <span
class="mi">16</span><span class="nx">px</span><span class="p">;</span>
+ <span class="nl">height</span><span class="p">:</span> <span
class="mi">16</span><span class="nx">px</span><span class="p">;</span>
+ <span class="nx">background</span><span class="o">-</span><span
class="nx">image</span><span class="err">:</span> <span
class="nx">url</span><span class="p">(</span><span
class="s1">'../images/indicator.gif'</span><span class="p">);</span>
+ <span class="nx">background</span><span class="o">-</span><span
class="nx">repeat</span><span class="err">:</span> <span
class="nx">no</span><span class="o">-</span><span class="nx">repeat</span><span
class="p">;</span>
+ <span class="nl">float</span><span class="p">:</span> <span
class="nx">right</span><span class="p">;</span>
+<span class="p">}</span>
+</code></pre>
+</div>
+
+<h3 id="javascript">JavaScript</h3>
+
+<p>Now this is where the magic happens. Here <em>jQuery</em> is used to
register an eventhandler which intercepts form submits. It takes
+care of hiding validation errors that might be present, submit the form via
AJAX and handle JSON responses.</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code> <span
class="cm">/**
+ * Validates form per AJAX. To be called as onSubmit handler.
+ *
+ * @param event onSubmit event
+ */</span>
+<span class="kd">function</span> <span
class="nx">ajaxFormValidation</span><span class="p">(</span><span
class="nx">event</span><span class="p">)</span> <span class="p">{</span>
+ <span class="nx">event</span><span class="p">.</span><span
class="nx">preventDefault</span><span class="p">();</span>
+ <span class="nx">_removeValidationErrors</span><span class="p">();</span>
+ <span class="kd">var</span> <span class="nx">_form</span> <span
class="o">=</span> <span class="nx">$</span><span class="p">(</span><span
class="nx">event</span><span class="p">.</span><span
class="nx">target</span><span class="p">);</span>
+ <span class="kd">var</span> <span class="nx">_formData</span> <span
class="o">=</span> <span class="nx">_form</span><span class="p">.</span><span
class="nx">serialize</span><span class="p">(</span><span
class="kc">true</span><span class="p">);</span>
+ <span class="c1">// prepare visual feedback</span>
+ <span class="c1">// you may want to use other elements here</span>
+ <span class="kd">var</span> <span class="nx">originalButton</span> <span
class="o">=</span> <span class="nx">_form</span><span class="p">.</span><span
class="nx">find</span><span class="p">(</span><span
class="s1">'.btn-primary'</span><span class="p">);</span>
+ <span class="c1">// note: jQuery returns an array-like object</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">originalButton</span> <span class="o">&&</span> <span
class="nx">originalButton</span><span class="p">.</span><span
class="nx">length</span> <span class="o">&&</span> <span
class="nx">originalButton</span><span class="p">.</span><span
class="nx">length</span> <span class="o">></span> <span
class="mi">0</span><span class="p">)</span> <span class="p">{</span>
+ <span class="nx">originalButton</span><span class="p">.</span><span
class="nx">hide</span><span class="p">();</span>
+ <span class="kd">var</span> <span class="nx">feedbackElement</span>
<span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span
class="s1">'<div class="ajaxVisualFeedback"></div>'</span><span
class="p">).</span><span class="nx">insertAfter</span><span
class="p">(</span><span class="nx">originalButton</span><span
class="p">);</span>
+ <span class="kd">var</span> <span class="nx">restoreFunction</span>
<span class="o">=</span> <span class="kd">function</span><span
class="p">()</span> <span class="p">{</span>
+ <span class="nx">originalButton</span><span
class="p">.</span><span class="nx">show</span><span class="p">();</span>
+ <span class="nx">feedbackElement</span><span
class="p">.</span><span class="nx">remove</span><span class="p">();</span>
+ <span class="p">}</span>
+ <span class="p">}</span>
+ <span class="kd">var</span> <span class="nx">options</span> <span
class="o">=</span> <span class="p">{</span>
+ <span class="na">data</span><span class="p">:</span> <span
class="s1">'struts.enableJSONValidation=true&struts.validateOnly=false&'</span>
<span class="o">+</span> <span class="nx">_formData</span><span
class="p">,</span>
+ <span class="na">async</span><span class="p">:</span> <span
class="kc">true</span><span class="p">,</span>
+ <span class="na">processData</span><span class="p">:</span> <span
class="kc">false</span><span class="p">,</span>
+ <span class="na">type</span><span class="p">:</span> <span
class="s1">'POST'</span><span class="p">,</span>
+ <span class="na">success</span><span class="p">:</span> <span
class="kd">function</span> <span class="p">(</span><span
class="nx">response</span><span class="p">,</span> <span
class="nx">statusText</span><span class="p">,</span> <span
class="nx">xhr</span><span class="p">)</span> <span class="p">{</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">response</span><span class="p">.</span><span
class="nx">location</span><span class="p">)</span> <span class="p">{</span>
+ <span class="c1">// no validation errors</span>
+ <span class="c1">// action has been executed and sent a
redirect URL wrapped as JSON</span>
+ <span class="c1">// cannot use a normal http-redirect
(status-code 3xx) as this would be followed by browsers and would not be
available here</span>
+ <span class="c1">// follow JSON-redirect</span>
+ <span class="nb">window</span><span class="p">.</span><span
class="nx">location</span><span class="p">.</span><span class="nx">href</span>
<span class="o">=</span> <span class="nx">response</span><span
class="p">.</span><span class="nx">location</span><span class="p">;</span>
+ <span class="p">}</span> <span class="k">else</span> <span
class="p">{</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">restoreFunction</span><span class="p">)</span> <span
class="p">{</span>
+ <span class="nx">restoreFunction</span><span
class="p">();</span>
+ <span class="p">}</span>
+ <span class="nx">_handleValidationResult</span><span
class="p">(</span><span class="nx">_form</span><span class="p">,</span> <span
class="nx">response</span><span class="p">);</span>
+ <span class="p">}</span>
+ <span class="p">},</span>
+ <span class="na">error</span><span class="p">:</span> <span
class="kd">function</span><span class="p">(</span><span
class="nx">xhr</span><span class="p">,</span> <span
class="nx">textStatus</span><span class="p">,</span> <span
class="nx">errorThrown</span><span class="p">)</span> <span class="p">{</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">restoreFunction</span><span class="p">)</span> <span
class="p">{</span>
+ <span class="nx">restoreFunction</span><span
class="p">();</span>
+ <span class="p">}</span>
+ <span class="c1">// struts sends status code 400 when validation
errors are present</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">xhr</span><span class="p">.</span><span class="nx">status</span>
<span class="o">===</span> <span class="mi">400</span><span class="p">)</span>
<span class="p">{</span>
+ <span class="nx">_handleValidationResult</span><span
class="p">(</span><span class="nx">_form</span><span class="p">,</span> <span
class="nx">JSON</span><span class="p">.</span><span
class="nx">parse</span><span class="p">(</span><span class="nx">xhr</span><span
class="p">.</span><span class="nx">responseText</span><span class="p">))</span>
+ <span class="p">}</span> <span class="k">else</span> <span
class="p">{</span>
+ <span class="c1">// a real error occurred -> show user an
error message</span>
+ <span class="nx">_handleValidationResult</span><span
class="p">(</span><span class="nx">_form</span><span class="p">,</span> <span
class="p">{</span><span class="na">errors</span><span class="p">:</span> <span
class="p">[</span><span class="s1">'Network or server error!'</span><span
class="p">]})</span>
+ <span class="p">}</span>
+ <span class="p">}</span>
+ <span class="p">}</span>
+ <span class="c1">// send request, after delay to make sure everybody
notices the visual feedback :)</span>
+ <span class="nb">window</span><span class="p">.</span><span
class="nx">setTimeout</span><span class="p">(</span><span
class="kd">function</span><span class="p">()</span> <span class="p">{</span>
+ <span class="kd">var</span> <span class="nx">url</span> <span
class="o">=</span> <span class="nx">_form</span><span class="p">[</span><span
class="mi">0</span><span class="p">].</span><span class="nx">action</span><span
class="p">;</span>
+ <span class="nx">jQuery</span><span class="p">.</span><span
class="nx">ajax</span><span class="p">(</span><span class="nx">url</span><span
class="p">,</span> <span class="nx">options</span><span class="p">);</span>
+ <span class="p">},</span> <span class="mi">1000</span><span
class="p">);</span>
+<span class="p">}</span>
+<span class="cm">/**
+ * Removes validation errors from HTML DOM.
+ */</span>
+<span class="kd">function</span> <span
class="nx">_removeValidationErrors</span><span class="p">()</span> <span
class="p">{</span>
+ <span class="c1">// action errors</span>
+ <span class="c1">// you might want to use a custom ID here</span>
+ <span class="nx">$</span><span class="p">(</span><span
class="s1">'ul.errorMessage li'</span><span class="p">).</span><span
class="nx">remove</span><span class="p">();</span>
+ <span class="c1">// field errors</span>
+ <span class="nx">$</span><span class="p">(</span><span
class="s1">'div.errorMessage'</span><span class="p">).</span><span
class="nx">remove</span><span class="p">();</span>
+<span class="p">}</span>
+<span class="cm">/**
+ * Incorporates validation errors in HTML DOM.
+ *
+ * @param form Form containing errors.
+ * @param errors Errors from server.
+ */</span>
+<span class="kd">function</span> <span
class="nx">_handleValidationResult</span><span class="p">(</span><span
class="nx">form</span><span class="p">,</span> <span
class="nx">errors</span><span class="p">)</span> <span class="p">{</span>
+ <span class="c1">// action errors</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">errors</span><span class="p">.</span><span
class="nx">errors</span><span class="p">)</span> <span class="p">{</span>
+ <span class="c1">// you might want to use a custom ID here</span>
+ <span class="kd">var</span> <span class="nx">errorContainer</span>
<span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span
class="s1">'ul.errorMessage'</span><span class="p">);</span>
+ <span class="nx">$</span><span class="p">.</span><span
class="nx">each</span><span class="p">(</span><span
class="nx">errors</span><span class="p">.</span><span
class="nx">errors</span><span class="p">,</span> <span
class="kd">function</span><span class="p">(</span><span
class="nx">index</span><span class="p">,</span> <span
class="nx">errorMsg</span><span class="p">)</span> <span class="p">{</span>
+ <span class="kd">var</span> <span class="nx">li</span> <span
class="o">=</span> <span class="nx">$</span><span class="p">(</span><span
class="s1">'<li><span></span></li>'</span><span
class="p">);</span>
+ <span class="nx">li</span><span class="p">.</span><span
class="nx">text</span><span class="p">(</span><span
class="nx">errorMsg</span><span class="p">);</span> <span class="c1">// use
text() for security reasons</span>
+ <span class="nx">errorContainer</span><span
class="p">.</span><span class="nx">append</span><span class="p">(</span><span
class="nx">li</span><span class="p">);</span>
+ <span class="p">});</span>
+ <span class="p">}</span>
+ <span class="c1">// field errors</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">errors</span><span class="p">.</span><span
class="nx">fieldErrors</span><span class="p">)</span> <span class="p">{</span>
+ <span class="nx">$</span><span class="p">.</span><span
class="nx">each</span><span class="p">(</span><span
class="nx">errors</span><span class="p">.</span><span
class="nx">fieldErrors</span><span class="p">,</span> <span
class="kd">function</span><span class="p">(</span><span
class="nx">fieldName</span><span class="p">,</span> <span
class="nx">errorMsg</span><span class="p">)</span> <span class="p">{</span>
+ <span class="kd">var</span> <span class="nx">td</span> <span
class="o">=</span> <span class="nx">$</span><span class="p">(</span><span
class="s1">'td[data-error-for-fieldname="'</span> <span class="o">+</span>
<span class="nx">fieldName</span> <span class="o">+</span> <span
class="s1">'"]'</span><span class="p">);</span>
+ <span class="k">if</span> <span class="p">(</span><span
class="nx">td</span><span class="p">)</span> <span class="p">{</span>
+ <span class="kd">var</span> <span class="nx">div</span> <span
class="o">=</span> <span class="nx">$</span><span class="p">(</span><span
class="s1">'<div class="errorMessage"></div>'</span><span
class="p">);</span>
+ <span class="nx">div</span><span class="p">.</span><span
class="nx">text</span><span class="p">(</span><span
class="nx">errorMsg</span><span class="p">);</span> <span class="c1">// use
text() for security reasons</span>
+ <span class="nx">td</span><span class="p">.</span><span
class="nx">append</span><span class="p">(</span><span
class="nx">div</span><span class="p">);</span>
+ <span class="p">}</span>
+ <span class="p">});</span>
+ <span class="p">}</span>
+<span class="p">}</span>
+<span class="c1">// register onSubmit handler</span>
+<span class="nx">$</span><span class="p">(</span><span
class="nb">window</span><span class="p">).</span><span
class="nx">bind</span><span class="p">(</span><span
class="s1">'load'</span><span class="p">,</span> <span
class="kd">function</span><span class="p">()</span> <span class="p">{</span>
+ <span class="nx">$</span><span class="p">(</span><span
class="s1">'form'</span><span class="p">).</span><span
class="nx">bind</span><span class="p">(</span><span
class="s1">'submit'</span><span class="p">,</span> <span
class="nx">ajaxFormValidation</span><span class="p">);</span>
+<span class="p">});</span>
+</code></pre>
+</div>
+
+<h3 id="how-it-works">How it works</h3>
+
+<p><em>jsonValidation</em> interceptor must be placed on a stack, following
the <em>validation</em> interceptor. The interceptor itself won’t perform any
+validation, but will check for validation errors on the action being invoked
(assuming that the action is ValidationAware).</p>
+
+<p>If you just want to use AJAX validation, without knowing the implementation
details, you can skip this section.</p>
+
+<p>When the <em>jsonValidation</em> interceptor is invoked, it will look for a
parameter named <em>struts.enableJSONValidation</em>, this parameter
+<strong>must</strong> be set to <em>true</em>, otherwise the interceptor won’t
do anything. Then the interceptor will look for a parameter named
<em>struts.validateOnly</em>,
+if this parameter exists, is set to <em>true</em>, and there are validation
errors (o action errors) they will be serialized into JSON in the form:</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="p">{</span><span class="w">
+ </span><span class="nt">"errors"</span><span class="p">:</span><span
class="w"> </span><span class="p">[</span><span class="s2">"Global Error
1"</span><span class="p">,</span><span class="w"> </span><span
class="s2">"Global Error 2"</span><span class="p">],</span><span class="w">
+ </span><span class="nt">"fieldErrors"</span><span class="p">:</span><span
class="w"> </span><span class="p">{</span><span class="w">
+ </span><span class="nt">"field1"</span><span class="p">:</span><span
class="w"> </span><span class="p">[</span><span class="s2">"Field 1 Error
1"</span><span class="p">,</span><span class="w"> </span><span
class="s2">"Field 1 Error 2"</span><span class="p">],</span><span class="w">
+ </span><span class="nt">"field1"</span><span class="p">:</span><span
class="w"> </span><span class="p">[</span><span class="s2">"Field 2 Error
1"</span><span class="p">,</span><span class="w"> </span><span
class="s2">"Field 2 Error 2"</span><span class="p">]</span><span class="w">
+ </span><span class="p">}</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre>
+</div>
+
+<p>If the action implements the <em>ModelDrive</em> interface, “model.” will
be stripped from the field names in the returned JSON. If validation
+succeeds (and <em>struts.validateOnly</em> is true), an empty JSON string will
be returned:</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="p">{}</span><span class="w">
+</span></code></pre>
+</div>
+
+<p>If <em>struts.validateOnly</em> is false the action and result are
executed. In this case <em>jsonActionRedirect</em> result is very useful. It
creates
+a JSON response in the form:</p>
+
+<div class="highlighter-rouge"><pre class="highlight"><code><span
class="p">{</span><span class="nt">"location"</span><span
class="p">:</span><span class="w"> </span><span class="s2">"<url to be
loaded next>"</span><span class="p">}</span><span class="w">
+</span></code></pre>
+</div>
+
+<blockquote>
+ <p>Remember to set <code
class="highlighter-rouge">struts.enableJSONValidation=true</code> in the
request to enable AJAX validation</p>
+</blockquote>
+
+<h3 id="jsonvalidationinterceptor-parameters">JSONValidationInterceptor
parameters</h3>
+
+<p>The following request parameters can be used to enable exposing validation
errors:</p>
+
+<ul>
+ <li><strong>struts.enableJSONValidation</strong> - a request parameter must
be set to <strong>true</strong> to use this interceptor</li>
+ <li><strong>struts.validateOnly</strong> - If the request has this
parameter, execution will return after validation (action won’t be executed).
+If <strong>struts.validateOnly</strong> is set to false you may want to use
<em>JSONActionRedirectResult</em></li>
+ <li><strong>struts.JSONValidation.no.encoding</strong> - If the request has
this parameter set to <strong>true,</strong> the character encoding will
<strong>NOT</strong> be set on
+the response - is needed in portlet environment</li>
+</ul>
+
+<p>You can override names of these parameters by specifying the following
parameters when setting up a stack:</p>
+
+<ul>
+ <li><strong>validateJsonParam</strong> - to override name of
<strong>struts.enableJSONValidation</strong>**</li>
+ <li><strong>validateOnlyParam</strong> - to override name of
<strong>struts.validateOnly</strong></li>
+ <li><strong>noEncodingSetParam</strong> - to override name of
<strong>struts.JSONValidation.no.encoding</strong></li>
+ <li><strong>validationFailedStatus</strong> - status to be set on response
when there are validation errors, by default <strong>400</strong></li>
+</ul>
+
+<p>Parameters overriding is available since Struts 2.5.9</p>
+
+<h2 id="flow-chart-of-ajax-validation">Flow chart of AJAX validation</h2>
+
+<p>Some details are omitted, like results used.</p>
+
+<p>As explained above: there is a case where form is submitted twice, one time
as AJAX with validation only and another time as usual submit.</p>
+
+<p><img src="struts2-ajax-vali-flow.png" alt="Flow chart " />
+ </p>
+
+ </section>
+</article>
+
+
+<footer class="container">
+ <div class="col-md-12">
+ Copyright © 2000-2018 <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
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+</footer>
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