Freemarker conditional class. Note that each template processing job has its own private set of these variables The basic element of FreeMarker is the interpolation. The chapters after this will go over things in much greater detail. To utilize FreeMarker instead of JSP with Spring MVC, follow this guide to configure it. It's meant to prepare the data to display in real programming language. Jun 27, 2013 · FreeMarker is a "template engine"; a generic tool to generate text output (anything from HTML to autogenerated source code) based on templates. ftl will be inside com. cache. Feb 28, 2015 · FreeMarker Manual> Template Author's Guide> The Template> Bookmarks: Alpha. By implementing this example you can perform a variety of JSON-based transformations, some of which include: dynamically updating data models customizing output structures seamlessly integrating with other JSON-based systems or APIs. branch. In this guide, you will learn how to easily render Freemarker templates in your application. However, currently all c_format that's built into FreeMarker result will give true or false. To illustrate my problem, here is the code that works: <#if _responses["getLinks"]["body"]. In my Freemarker template, I have the following loop May 15, 2019 · I would like to apply a class to my title component in Magnolia only if the content editors have chosen to add the subtitle component to a page. Nonetheless, once you have read this chapter, you will be able to write simple but useful FreeMarker templates. All that was defined in /libs/commons. someProperty = FreeMarker Basics Using Merge Tags from a MessageGears Audience Conditional Statements Supplement Conditional Statements Operators in Conditional Statements Creating and using Variables FreeMarker Basics FreeMarker is an open-source templating language. Jun 27, 2013 · The simplest template is a plain HTML file (or whatever text file -- FreeMarker is not confined to HTML). 28 / reference /ref_directive_if. Null fields can break your logic, especially in conditional statements. FreeMarker templates support an if-statement with the following syntax <#if hot> It's hot. Sep 2, 2024 · Overview This article shows methods of handling NULL values and empty values within FreeMarker. Thymeleaf, Mustache, and Apache FreeMarker are among the most popular Oct 10, 2015 · This page will walk through java Freemarker templates (FTL) tutorial with HTML example. Sep 27, 2023 · I recently needed a custom fragment to show the number of comments each web content in a collection display fragment had. setObjectWrapper(new DefaultObjectWrapper()); Map<String, Object> root=new HashMap<String, Object>(); root. Because this data changes, you cannot use static HTML. Here's how you can effectively use if-else statements to handle undefined values. Understanding how to leverage ternary operations in Freemarker templates is essential for creating dynamic and responsive Apr 7, 2024 · FreeMarker Templates For Generating Text Outputs Apache FreeMarker is primarily designed to generate dynamic web content for Java-based web applications that follow the MVC architecture. freemarker. Understanding Freemarker operations is crucial for developers who want to simplify the view layer of their applications Freemarker is an open source powerful template language. spec_vars, FAQ, Glossary, API, Home Next page Mar 18, 2019 · Is there a better way to write this IF statement for testing multiple options of a variable? &lt;#if PRINTER_PET. Hash keys are interpreted as XPath expressions, except the special keys shown in the table below. When Aug 2, 2022 · 三、@ConditionalOnClass是怎么实现的 要理解@ConditionalOnClass是怎么实现的还是要回到该注解的定义上，前边提到该注解被 @Conditional(OnClassCondition. html FreeMarker is a Java templating engine and can be used as a view resolver with the popular Spring MVC framework. Its integration as a Quarkus extension provides developers ease of configuration, and offers support for native images. May 26, 2014 · I am using Spark framework with Freemarker templating engine. This is basically a statement that is used to reference and display a specific piece of information. FTL is designed for describing presentation logic, with a focus on separating data generation from data representation. In the case the string which is evaluated contains an string the validation does not return the correct Nov 10, 2023 · FreeMarker template follows the MVC pattern to write dynamic content to JSON without manually changing the template. WebappTemplateLoader. ) Oct 25, 2013 · In Java the logical operators && and || short-circuit, meaning they do not evaluate anything after the operator if they do not need to. jython package: FreeMarker can now directly use Jython objects as data-models using the Jython wrapper. With Click, yo Oct 23, 2020 · The spring. Sometimes this format is not appropriate, say you have an ID number which is a long, e. This formats is independent of the boolean_format configuration setting, as that setting is meant to specify the format for human readers. Jun 22, 2025 · If you are new to FreeMarker, you should read at least the Template Author's Guide/Getting Started/Template + data-model = output before this chapter. This page covers the syntax, directives, expressions, and built-ins Note that because the FreeMarker template language assumes that sequences (lists, arrays, etc. Note however, that FreeMarker will try to find and interpret the ftl directive first with the automatically guessed encoding (which depends on the FreeMarker configuration set by the programmers), and only then realizes if the ftl directive dictates something different, and re-read the template with the new encoding. ) based on templates and changing data. FreeMarker is used to create dynamic queries by allowing you to embed conditional logic and data-driven elements into your queries. I pass a list of category (a Java class that has getId() method) to my template. It contains console, servlet, Spring, and Spring Boot applications. Freemarker. 16. However if you want that page to be more dynamic then you begin to put special parts into the HTML which will be understood by FreeMarker: Apr 28, 2025 · FreeMarker is the Apache Software Foundation that produces the Java-based template engine. com FreeMarker supports some more syntactical alternatives: &gt; and &lt; can also be used, like in: <#if x &gt; y> or <#if x &gt;= y>. Instead, you can use a template of the desired output. 3. Aug 6, 2021 · Freemarker seemed to offer what I was looking for, but I have run into a problem when dealing with lists. The condition -s must evaluate to a boolean value, or else an error will abort template processing. Feb 3, 2014 · To see more about boolean expressions, see: Template Author's Guide/Expressions. Jun 22, 2025 · The simplest template is a plain HTML file (or whatever text file; FreeMarker is not confined to HTML). template-loader-path property defines the path to FreeMarker template files, the spring. When the client visits that page, FreeMarker will send that HTML to the client as is. When creating Advanced PDF Templates in NetSuite, dealing with null values is a common challenge. More information about F FreeMarker code is a "template engine" designed to generate text output based on templates and changing data. gst?string ("Yes", "No Mar 23, 2024 · Mastering Dynamic Email Templates with FreeMarker: A Comprehensive Guide to Design, Personalization, and Optimization Creating an email template that is compatible across various web clients is an … Oct 17, 2023 · <#if ${ is merely a syntax error, and the template won't even start with that. This means that it uses placeholder text, also called variables, to create dynamic content. Freemarker uses the built in Java formatter based on the value type. public static void main(String[] args) throws Exception { Configuration config=new Configuration(); config. The following example shows using if else directives in FreeMarker. This blog presents the development of the fragment and shows just how easy it can be to create a custom fragment using the Fragments Editor. May 17, 2014 · I am wondering how to assess two conditions in an <#if> statement in FreeMarker Template ? for example, in pseudo code: do something; how to use two conditions in Freemarker? thanks. jar to be in classpath. Jan 13, 2016 · I am new to freemarker template . Jun 27, 2013 · You can use if, elseif and else directives to conditionally skip a section of the template. data. There's also freemarker. This answer provides a good example Also, the last post in this forum thread speaks specifically to freemarker supporting short-circuiting logical Jun 14, 2017 · I have a conditional if, which takes a field, and evaluate its value against a fixed string. getStaticModels() method. However if you want that page to be more dynamic then you begin to put special parts into the HTML which will be understood by FreeMarker: ${}: FreeMarker will replace it in the output with the actual On this page On this page freemarker / 2. A programming cheat sheetFreemarker Hello World escaping output whitespace basics types string number boolean map sequence date fragments control flow Tree structures Logging Using FreeMarker with servlets Configuring security policy for FreeMarker Legacy XML wrapper implementation Using FreeMarker with Ant Jython wrapper Template Language Reference Built-in Reference Alphabetical index Built-ins for strings Built-ins for numbers Built-ins for date/time/date-time values Built-ins for booleans Built-ins for Jun 22, 2025 · Apache FreeMarker ® is a template engine: a Java library to generate text output (HTML web pages, e-mails, configuration files, source code, etc. At this point, the values for those variables are checked, a condition is included to account for edge cases, and the conditional statement is closed out. It must I have freemarker templates with IE conditional comments. Learn its features, benefits, and integration techniques in this comprehensive guide. Do the same thing to the last table cell, but adjust the #if condition so that instead of “i % 2 = 0” it is now “i % 2 = 1”. Jun 22, 2025 · Learn the basics of Apache FreeMarker, a template engine for generating text output, through practical examples and imperative programming concepts. Then the namespace is assigned to the variable Freemarker is a Java template engine that commonly uses tags such as: if is used for conditional statements and can be combined with else, elseif, and endif. Every variable that corresponds to a single node in the DOM tree is a multi-type variable of type node and type hash (for programmers: implements both TemplateNodeModel and TemplateHashModel). expose-request-attributes in Spring Boot In Spring Boot applications that use FreeMarker as a templating engine, the spring. FreeMarker Java template engine. Example of what I am trying to do below: Jun 27, 2013 · Synopsis: exp?substring (from, toExclusive), also callable as exp?substring (from) In Spring Boot FreeMarker tutorial we are going to create a simple Spring Boot web application with FreeMarker template engine and H2 database. So I'm trying to clean up my templates by using freemarker comments so that the unused conditional comments don't show up in html files. Let's cover a few of the basic templating directives here, but be sure to look through the available directives in the sidebar for an exhaustive list. (Note that Jakarta packages/classes are not visible in the FreeMarker source code, as they are generated during build from the pre-Jakarta classes. ). Freemarker-FTL-Code-Examples This repository contains examples which demonstrate how to use the FTL templates. It also demonstrates the usage of macros. Jan 27, 2025 · Conditional mapping with @TargetPropertyName fails for nested update mappings #3809 Open sdkrach opened this issue on Jan 27 · 0 comments Feb 3, 2016 · Simple, Easy to understand and quality tutorial on Template Engines, If Else May 1, 2023 · Explore Apache Velocity to enhance Java development with efficient template engines. WebappTemplateLoader, which is the Jakarta equivalent of freemarker. The model sets up a list which is then displayed using the ftl template May 27, 2025 · Understanding spring. ) and hashes (maps, beans, etc. Goals Learn how to interpret the syntax o Jun 22, 2025 · Apache FreeMarker ® is a template engine: a Java library to generate text output (HTML web pages, e-mails, configuration files, source code, etc. Apr 4, 2003 · FreeMarker templates don't support modifying the contents of containers (such as adding, removing or replacing sub variables), and it assumes that their content won't change during template processing. Described more technically, import first creates a new empty namespace, and then executes the template given with path parameter inside that namespace, so the template populates the namespace with variables (macros, functions, etc. Instead, it depends on the c_format setting. servlet. Templating Alpine offers a handful of useful directives for manipulating the DOM on a web page. Synopsis Description Simplest form else directive items directive sep directive break directive continue directive Accessing iteration state Skipping items conditionally Nesting loops into each other Treatment of missing (null) elements Notes for Java programmers Feb 2, 2016 · NetSuite’s Advanced PDF/HTML templates truly empower users with endless options for customizations to printed forms, with the support of FreeMarker. You must not use ${} at places where FreeMarker already expects a FreeMarker expression. In the example you've given if person evaluates to false then the rest of the condition will not be evaluated. You also need a Java class to combine template and data model, but your Java class can also provide data model in terms of objects. This requires the library freemarker-2. I get Error while parsing the ftl file <#if debitNote. It's a Java package, a class library for Java programmers. The MVC paradigm is supported by FreeMarker, just like it is by other template engines, for HTML web pages in apps. if the condition is true the contents are rendered. setClassForTemplateLoading(Conditional. This enables more flexible and powerful interactions with external data sources. I need to display a string based on boolean condition. put("n", 10); root. Jun 22, 2025 · But the user's name ("John Doe" above) depends on who the logged-in user is, and the latest product information should come from a database. Freemarker is a powerful Java templating engine that allows developers to create dynamic web pages by combining HTML with data models. list: used for iterating through a collection, can be used in conjunction with else and endlist. If not then nothing is rendered. Jan 26, 2024 · Freemarker is a Java-based template engine. Alternatively, you can use XML file to provide data. Here’s how to handle null values effectively in Freemarker. I think there's a switch where you can show all Transactions or only open invoices. jakarta. RETAILER_NAME = 'Best Buy Purchasing LLC' Freemarker. When setting up a conditional statement you must begin by assigning a variable for any fields you want to reference using the #assign Freemarker Tag. id == (_map((_responses. java] Deploy uses the FreeMarker templating engine to allow you to access deployment properties such as such as the names or locations of files in the deployment package. - NMandisa/fr Integrating if-else statements inside macro parameters in Freemarker can enhance your template's flexibility by allowing conditional rendering based on the macro's input. You can use the JSON snippet below as a model. The tricky part in that expression is that the > operator ends the FTL tag. After the templates become html templates I still see the other IE conditional comments. Text content Alpine makes it easy to control the text content of an element with the x-text directive. Jun 22, 2025 · This chapter is a very rough introduction to FreeMarker. Jul 9, 2013 · As of FreeMarker 2. We can use Freemarker templates for different purposes like generating HTML files, emails, source code etc. Feb 28, 2015 · <#if x == 1> x is 1 <#elseif x == 2> x is 2 <#elseif x == 3> x is 3 <#elseif x == 4> x is 4 <#else> x is not 1 nor 2 nor 3 nor 4 </#if> Feb 3, 2015 · To see more about boolean expressions, see: Template Author's Guide/The Template/Expressions. 123456. put("name", "Hello"); See full list on baeldung. References Freemarker Manual FMPP Manual Install Feb 24, 2012 · The #if is a FreeMarker conditional statement. Macro: A tool for defining reusable code blocks Freemarker是一款模板引擎： 即一种基于模板和要改变的数据，并用来生成输出文本的通用工具。 Follow Introduction to FreeMarker with Click Syntax and Interpolations Common Uses for Freemarker Personalization Menu Restrictions Conditional Statements Understanding Basic Render Errors. Templates are written in the FreeMarker Template Language (FTL), which is a simple, specialized language (not a full-blown programming language like PHP). Usually, a general-purpose programming language (like Feb 3, 2016 · If Else FreeMarker is a java based template engine for complex template processing. Jul 13, 2015 · Learn how to alternate table row colors in FreeMarker with helpful tips and code examples discussed by the community. cst)?substring(0,3), "cstarray"))> false </#if> Now my problem ist the first if-block: Unfortunately, even if "_responses Jun 22, 2025 · Most of the variables that a typical template works with comes from the data-model. The Spring Framework has built-in integration for using Spring MVC with FreeMarker templates. Contribute to atlassian/freemarker development by creating an account on GitHub. To use FreeMarker variables in the fragment HTML editor, start by setting navigationMenuSelector as the configuration type. Oct 6, 2025 · Can Freemarker handle conditional rendering in forms? Yes, Freemarker supports control structures like #if and #list, allowing developers to dynamically render form fields or messages based on validation results. This tutorial explains how can you define FreeMarker templates and how can you generate output based on these templates. FreeMarker Tutorial. getInfo. Freemarker is a very popular and mature templating engine. Thus, you can use the node built-ins with them. In this tutorial, we will explore the fundamental Freemarker operations essential for building effective templates in Java applications. htm', 'b. FreeMarker is a templating language supported in the MessageGears Templates. ) are immutable, you can not write something like <#assign myObj. Some of the node variables also have string type, so you Nov 7, 2018 · Could not prepare mail; nested exception is freemarker. You can nest if directives (of course): Feb 3, 2016 · FreeMarker is a java based template engine for complex template processing. This built-in converts a boolean to a "computer language" literal, as opposed to format it for human reading. May 12, 2015 · How to use "or" in freemarker templates Asked 10 years, 5 months ago Modified 8 years, 1 month ago Viewed 26k times I have a Freemarker template which contains a bunch of placeholders for which values are supplied when the template is processed. I want to conditionally include part of the template if the userName variable is supplied, something like: Using the navigationMenuSelector configuration type, you can access FreeMarker variables through the fragment HTML editor and define markup for rendering custom navigation menus. But templates can also define variables themselves, usually to hold loops variables, temporary results, macros, etc. </#if> I've looked in the documentation and can't find any support for an if-else statem Learn how to use the ternary operator in FreeMarker for conditional rendering in templates. Conditional Value Selection: These functions facilitate the selection of values based on a boolean expression, enhancing template flexibility. Comprehensive guide to string built-ins in Apache FreeMarker, covering usage and examples for efficient template development. class, ""); config. Jun 22, 2025 · You can use if, elseif and else directives to conditionally skip a section of the template. class) 注解标识，@Conditional注解的含有是要满足条件才会生效，该注解后边再看。 今天的主角是OnClassCondition类，看下其继承 Oct 6, 2012 · I am using alternative freemarker syntax (the one with square brackets). Jun 22, 2025 · Note the com. js is bridge API for fmpp to make Freemarker available with node. expose-request-attributes property determines whether request attributes are automatically exposed to the FreeMarker template context. Jan 27, 2024 · This is an introductory tutorial of the FreeMarker Java template engine. js FreeMarker is a "template engine". g. FreeMarker is as an alternative to other view resolvers like JSP, XSL, or Velocity and is an actively maintained, open-source project. This is the syntax for freemarker comments: <#-- comments -->. Such variables are outside the data-model; modifying the data-model from templates is by design unsupported. Answer: In FreeMarker templates, dealing with undefined variables in if-else statements is crucial for avoiding errors in your templates. Learn how to effectively use if-else statements in FreeMarker templates to control program flow with examples and best practices. The advantage of condition?then(whenTrue, whenFalse) over condition?string(whenTrue, whenFalse) is that it works for non-string whenTrue and whenFalse, and that it only evaluates one of whenTrue and whenFalse expressions (whichever branch is chosen). FreeMarker or FreeMarker Template Language (FTL) is an open source Java-based template engine that is used to dynamically render text output in various formats, by providing template processing capabilities and an API that lets users extend or Jul 8, 2023 · FreeMarker HelloWorld Example In order to create hello world in freemarker, you need two things, first a freemarker template and second a data model. It works fine but I am not able to figure out how to use if condition to check if a number is greater than or less than. Oct 17, 2012 · Is it possible to have and (&&) in freemarker or do I have to use a nested if? <#if object?exists > </#if> Apache FreeMarker is a template engine for generating any kind of text output from HTML to email and others. The classes for my data model look like this: public class Order { public String orderNumber; public Date processed; public Boolean release; public List<OrderLine> lines; } public class OrderLine { public String unit; The StaticModel and StaticModels classes are gone; their functionality is now replaced with the BeansWrapper. js. Jun 10, 2016 · FreeMarker Tutorial. Just flip that switch instead of fiddling with trying to filter out tran types in Freemarker. This isn't meant to be entered manually; it's to work around cases where the template gets XML/HTML escaped and the user can't easily prevent that happening. ext. Assign: used to assign a value to a variable. The elseif -s and else -s must occur inside if (that is, between the if start-tag and end-tag). Best practices and code examples included. locations[0]. 23 you can write a?then('a. May 18, 2025 · Template Language (FTL) Relevant source files Purpose and Scope This document describes the FreeMarker Template Language (FTL), which is the specialized language used to write templates in Apache FreeMarker. Example of using a FTL template in a Java File. body. Freemarker is an open source powerful template language. RETAILER_NAME = 'BEST BUY' || PRINTER_PET. htm'). include: used to incorporate other templates. locations??> true <#elseif _responses["getLinks"]["body"]. Explore its key features, how it works, use cases, and how to get started using it. 100% language support like Freemarker on Java. index, Expressions, ?builtins, #directives, . If a variable or value is not defined, it can lead to unexpected behaviors or null outputs in your rendered templates. _MiscTemplateException: Can't convert boolean to string automatically, because the "boolean_format" setting was "true,false", which is the legacy default computer-language format, and hence isn't accepted. freemarker. Dec 22, 2023 · In the realm of Java-based web development, selecting the right templating engine is crucial for rendering dynamic content. Jan 8, 2025 · I do not succeed in creating one if clause with 2 checks. ftl This is the freemarker template file. suffix property defines the file extension we would like to use Run the application Create an Application class and use @SpringBootApplication annotation to launch the application [WebApplication. The template is the same as the static HTML would be, except that it contains some instructions to FreeMarker that makes it dynamic: Jun 21, 2024 · Easy Ternary Operation: Freemarker simplifies the use of ternary operators by providing built-in functions such as then and string. core. It has versatile data model. before the macro name above. pntpkqzv 5sn nxez11ym pupu9yw eoov1hh 7h8n uuwsu dcn gyc eaxjfu