Freemarker if or operator. It's a frequent mistake to use interpolations on places where they needn't/shouldn't/can't be used. Best practices and code examples included. When the client visits that page, FreeMarker will send that HTML to the client as is. Mar 11, 2025 · Download Manual Search formSearch querySearch Apache FreeMarker Manual Search results Bookmarks: Alpha. UPDATE: you don't have built in method to compare lexicographically String in FreeMarker, so you have 2 options: Create your own method to compare the Strings with built-in functions, iterating over strings and comparing Oct 6, 2012 · I am using alternative freemarker syntax (the one with square brackets). t. Feb 3, 2016 · If Else FreeMarker is a java based template engine for complex template processing. It can be followed by any variable followed by ?, then followed by the built-in function, and the output variable can be converted by the built FreeMarker templates support an if-statement with the following syntax <#if hot> It's hot. This documentation provides an overview of how to use FreeMarker with Elements Connect Cloud. 0, [7] and Swift [8] as nil-coalescing operator. It's a Java package, a class library for Java programmers. It also demonstrates the usage of macros. Jun 22, 2025 · Further details: The comparison of matchedValue to the case parameter value behaves exactly like the == operator. There are else and items to deal with special cases with 0-length lists, and sep for inserting separators between items. </#if> I've looked in the documentation and can't find any support for an if-else statem Feb 3, 2020 · The default value operator (exp!exp) is not yet in the table because of a programming mistake, which will be only fixed in FreeMarker 2. We hope things will soon be sufficiently mature for us to offer (almost) backward-compatible releases Nov 14, 2020 · string. 4 due to backward compatibility constraints. For example, suppose there is no variable named mouse in the code shown To find the value the built-in uses FreeMarker's comparison rules (as if you was using == operator), except that comparing two values of different types or of types for which FreeMarker doesn't support comparison will not cause error, just will be evaluated as the two values are not equal. Introduction FreeMarker is a template engine, written in Java, and maintained by the Apache Foundation. We can use the FreeMarker Template Language, also known as FTL, to generate many text-based formats like web pages, email, or XML files. Feb 3, 2020 · 1 Built-in Reference Alphabetical index Built-ins for strings Built-ins for numbers Built-ins for dates Built-ins for booleans Built-ins for sequences Built-ins for Jun 21, 2024 · Easy Ternary Operation: Freemarker simplifies the use of ternary operators by providing built-in functions such as then and string. In this tutorial, we’ll see what we can… Continue Reading freemarker-operations 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. Understanding how to leverage ternary operations in Freemarker templates is essential for creating dynamic and responsive Feb 3, 2015 · To see more about boolean expressions, see: Template Author's Guide/The Template/Expressions. FreeMarker is a powerful templating engine that allows you to create queries that can generate dynamic content based on data and conditions. FTL is designed for describing presentation logic, with a focus on separating data generation from data representation. Learn how to handle nullable values in Freemarker effectively, understand the `??` operator, and troubleshoot common issues. now?date} Apr 17, 2015 · Update: Starting from FreeMarker 2. Hence it only compares scalars and only same-type values. Overview Please note that before starting that MessageGears uses Apache FreeMarker (version 2. ${booleanVar?string} is dangerous for that, since somebody can set the boolean_format setting to yes,no or something Jun 27, 2013 · To find the value the built-in uses FreeMarker's comparison rules (as if you was using == operator), except that comparing two values of different types or of types for which FreeMarker doesn't support comparison will not cause error, just will be evaluated as the two values are not equal. Jun 30, 2020 · And [” “] access Book. 0 releases. If a variable or value is not defined, it can lead to unexpected behaviors or null outputs in your rendered templates. FreeMarker is a templating language supported in the MessageGears Templates. Understanding Freemarker operations is crucial for developers who want to simplify the view layer of their applications Jan 13, 2016 · You can use ternary expression with the then expression: ${debitNote. Jun 22, 2025 · To see more about boolean expressions, see: Template Author's Guide/The Template/Expressions. 23) for both Content Templates and SQL templates. If there is no on or case directive with appropriate refValue, then it continues processing at the default directive, if that exists, otherwise it continues the processing after the end-tag of switch. This page covers the syntax, directives, expressions, and built-ins 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 Date of release: 2002-10-17 Templates and the Java API are not fully compatible with 2. x series. NonBooleanException: For "#if" condition: Expected a boolean, but this has evaluated to a number (wrapper: f. 23, you should use condition?then(whenTrue, whenFalse) for ternary operator. The code between the start-tag and end-tag will be processed for the 1st subvariable, then for the 2nd subvariable, then for the 3rd subvariable, etc until it passes the last one. More information about F 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 Jul 28, 2015 · My version of Freemarker is 2. 12. js FreeMarker is a "template engine". #-# Sequences Directive Description 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 sequences Built-ins for hashes Built-ins for nodes (for XML) Loop variable built-ins Type independent built-ins Built-In FreeMarker Date Operations The following expression derives the current date using the FreeMarker special variable reference, . freemarker avoid if condition output blank line, Programmer Sought, the best programmer technical posts sharing site. Apr 27, 2015 · In FreeMarker you can use == to compare Strings, but depending the meaning of <= for you, you can use BuiltIn for strings to compare the lenght, the content, or what you need. Goals Learn how to interpret the syntax o Jun 22, 2025 · 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 sequences Built-ins for hashes Built-ins for nodes (for XML) Loop variable built-ins Type independent built-ins Seldom used and expert built-ins 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. The operators in this table are listed in precedence order: the higher in the table an operator appears, the higher its precedence. Some explanation of that follows (loopVar?index returns the 0-based index in the listable value we iterate through): Feb 3, 2020 · Used like booleanExp?then(whenTrue, whenFalse), fills the same role as the ternary operator in C-like languages (i. 100% language support like Freemarker on Java. There are two Freemarker common operator FreeMarker operator (four) FreeMarker three-mean operator FreeMarker three -eyed operator dynamic transmission value freemarker 2. GET) public String doAction(@RequestPa Note that as in FreeMarker foo. Sep 2, 2024 · Overview This article shows methods of handling NULL values and empty values within FreeMarker. Off course, all three expression can be arbitrary Jun 22, 2025 · 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 sequences Built-ins for hashes Built-ins for nodes (for XML) Loop variable built-ins Type independent built-ins Seldom used and expert built-ins Directive Reference Alphabetical index assign attempt, recover autoesc compress escape Oct 31, 2024 · FreeMarker对空值的处理非常严格，FreeMarker的变量必须有值，没有被赋值的变量就会抛出异常，因为FreeMarker未赋值的变量强制出错可以杜绝很多潜在的错误，如缺失潜在的变量命名，或者其他变量错误。为了处理缺失变量，FreeMarker提供了两个运算符。 Freemarker is a powerful Java templating engine that allows developers to create dynamic web pages by combining HTML with data models. Order. It contains console, servlet, Spring, and Spring Boot applications. is there any predefined function available HelloIamShruti IamShrutiHello In FreeMarker templates, dealing with undefined variables in if-else statements is crucial for avoiding errors in your templates. But in the above examples we have to use the square bracket syntax, because the characters involved (numbers, dot, #) aren't allowed syntactically after the dot operator. Date of release: 2015-07-05 Changes on the FTL side Listing (#list) has received some specialized convenience features that target typical tasks people do again and again in templates. For more details, see the list directive in the However, adding sequences or hashes with the + operator to form another value is supported; see in the chapter about expressions, and please note the performance consequences. gst?then("Yes", "No")} The string boolean builtin function has been deprecated since FreeMarker 2. 10 as logical defined-or, [6] PowerShell since 7. Jun 22, 2025 · These built-ins you can only use with the loop variable of the list and items directives (and of the deprecated foreach directive). - NMandisa/fr Jun 27, 2013 · Synopsis: exp?substring (from, toExclusive), also callable as exp?substring (from) Freemarker. Feb 28, 2015 · Intro. #-# Booleans Directive Description c Boolean to String for computer languages. SimpleNumber): ==> dogNames?size i. 4. attr} Logical operators, logical operators can only be used for Boolean values. bar is equivalent with foo["bar"], you could also write x?string. In this blog it is said that double quotes is enough to escape the bracket, but I'm not managed to do that in Java. This formats is independent of the boolean_format configuration setting, as that setting is meant to specify the format for human readers. 20, if you want to print true/false (because you are generating JavaScript or such), write ${booleanVar?c} (?c for "computer format", also used for numbers). com FreeMarker is a powerful template engine for Java applications, allowing for the integration of dynamic data into HTML and other formats. No parameter after '!' Returns a null by default. Addresses. Wednesday, May 7, 2008, 10:04:21 PM, Newman, John W wrote: > Hi, > > Just wondering what, if any, plans to support or existing support > we have for the useful Boolean ? expr : expr construct… > > Currently I’m stuck with this 5 liner > > [#if pageNumber - numPagesToShow > 0] > [#assign firstPage = pageNumber – numPagesToShow /] > [#else] > [#assign firstPage = 1 /] > [/#if] > > Could be Oct 20, 2024 · How can I avoid the null errors in FreeMarker templates? Incorporate the ?? operator to check if a value exists and apply a default fallback using the !myDefault operator. Jun 27, 2013 · FreeMarker supports an alternative syntax, where [ and ] is used instead of < and > in FreeMarker directives and comments, for example: Jan 4, 2021 · In this post, we will learn how to use Apache FreeMarker for data format transformations What is Apache FreeMarker? Apache FreeMarker is a template engine: a Java library to generate text output (HTML web pages, e-mails, configuration files, XML, JSON, source code, etc. core. Sorry for this inconvenience; FreeMarker has undergone some revolutionary changes since the 1. 20. jar to be in classpath. 0, [5] Perl since version 5. May 22, 2020 · I have below scenario in apache free marker. That is, when the switch directive is processed, it chooses an on or case directive where a refValue equals with value, and continues the processing of the template there. Freemarker. For more detailed information on FreeMarker, the of How to use if else condition in FreeMarker ayushimittal A Score Level 1 over 5 years ago Learn how to handle null or empty lists in FreeMarker templates with clear examples and best practices. ) based on templates and changing data. This built-in converts a boolean to a "computer language" literal, as opposed to format it for human reading. format Converts date-like object to string. If tags (<#if>) are handled like standard HTML tags in that each opening if tag requires a matching closing if tag (</#if>). ${. Be careful with case 's Jun 27, 2013 · The simplest template is a plain HTML file (or whatever text file -- FreeMarker is not confined to HTML). , booleanExp ? whenTrue : whenFalse). Let's look at condition more closely: == is an operator that tests if the values at its left and right side are equivalent, and the Jun 25, 2018 · freemarker. 16. In this tutorial, we will explore the fundamental Freemarker operations essential for building effective templates in Java applications. If booleanExp evaluates to boolean true then it evaluates and returns its first argument, or else if booleanExp evaluates to boolean false then it evaluates and return its second argument. currency as x?string["currency"], but of course that wouldn't be practical. js. FreeMarker Tutorial. 18, I'm using Freemarker + Flying-saucer + Itext to generate PDF file, everything works fine, the problems comes only there is a & in the String. Is it possible to have and (&&) in freemarker or do I have to use a nested if? <#if object?exists > </#if> Jul 9, 2013 · Use ternary operator in freemarker? Asked 12 years, 2 months ago Modified 4 years ago Viewed 63k times 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> May 18, 2014 · The tricky part in that expression is that the > operator ends the FTL tag. References Freemarker Manual FMPP Manual Install Apr 30, 2014 · String comparison in freemarker not working Asked 11 years, 2 months ago Modified 11 years, 2 months ago Viewed 16k times The basic element of FreeMarker is the interpolation. Writing conditional queries with Apache FreeMarker Elements Connect supports the use of FreeMarker for dynamic query construction. Apache FreeMarker is a template engine for generating any kind of text output from HTML to email and others. This is basically a statement that is used to reference and display a specific piece of information. New list directive child directives. Dec 30, 2019 · Default value operator: Use forms such as: userName! default_expr Or userName! Or (userName)! Default_expr Or (userName)! This operator allows you to specify a default value (default_expr) for a variable that may not exist. ?? operator treats missing value and false. 1 for new projects only. The Spring Framework has built-in integration for using Spring MVC with FreeMarker templates. You will need to revisit existing code and templates, or use 2. That can have a non-string result and lazy-evaluates A programming cheat sheetFreemarker Hello World escaping output whitespace basics types string number boolean map sequence date fragments control flow Tree structures Dec 17, 2013 · In freemarker template you cannot use interpolations inside if statement. Dec 19, 2012 · How to handle null values in Freemarker? I get some exceptions in the template when null values are present in data. Reading requires a certain code base or an understanding of Freemarker. 0, [2] Dart [3] since version 1. 0, [4] PHP since version 7. author [” name “] // USES a mixture of dot syntax and square bracket syntax To handle missing variables,FreeMarker provides two operators: to prevent exceptions caused by objects that do not exist ! : Specifies the default value of the missing variable ?? : Determines whether a variable exists and returns a Interpolation $ {variableName} $ {obj. Feb 3, 2014 · To see more about boolean expressions, see: Template Author's Guide/Expressions. index Oct 8, 2019 · FreeMarker Common Operations 1. js is bridge API for fmpp to make Freemarker available with node. See freemarker manual for formats. &&: logical AND; ||: logical OR; !: logical non Built-in function FreeMarker provides some built-in functions to convert the output. We would like to show you a description here but the site won’t allow us. Note: The c built-in supports booleans since FreeMarker 2. The null coalescing operator is a binary operator that is part of the syntax for a basic conditional expression in several programming languages, such as (in alphabetical order): C# [1] since version 2. This requires the library freemarker-2. Using if-else statements is crucial for controlling flow based on certain conditions within templates. 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: Jun 27, 2013 · testing for missing, Missing value test operator testing for null, Missing value test operator testing for undefined, Missing value test operator text, Overall structure thread-safety, Multithreading time built-ins, Built-ins for dates Java API related difficulties, Scalars Java side, Scalars the FTL value type, Scalars time_format, setting Feb 2, 2022 · If you are not confortable with this choice, you can use the Default value operator (use myVar! instead of myVar), or use another templating framework. The most common tags used in conditional statements are <#if>, <#elseif>, and <#else>, although other logical operators like AND, OR, and NOT can also be handled through Freemarker. Jan 27, 2024 · This is an introductory tutorial of the FreeMarker Java template engine. boolean cap_first capitalize chop_linebreak contains date, time, datetime ends_with ensure_ends_with ensure_starts_with groups html index_of j_string js_string json_string keep_after keep_after_last keep_before keep_before_last last_index_of left_pad length lower_case matches number replace right_pad remove_beginning remove_ending rtf split starts_with string (when used with a string Feb 3, 2016 · FreeMarker is a java based template engine for complex template processing. str1= Shruti str2 it can be( "Shruti" ,"shruti", shruti,'Shruti' or SHRUTI) if string 2 is either with double quote or single quote or plain, we nee Apr 13, 2017 · I am checking the value of a an attribute in a freemarker which is set in the Spring controller. Jun 27, 2013 · <#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> Jun 27, 2013 · The default value operator (exp!exp) is not yet in the table because of a programming mistake, which will be only fixed in FreeMarker 2. This tutorial explains how can you define FreeMarker templates and how can you generate output based on these templates. 20 and has been replaced with then. Common Freemarker syntax example Common Freemarker syntax example (2) Starting from FreeMarker 2. You can nest if directives (of course): Feb 28, 2015 · The default value operator (exp!exp) is not yet in the table because of a programming mistake, which will be only fixed in FreeMarker 2. FreeMarker supports an alternative tag syntax, where [ and ] is used instead of < and > in FreeMarker directives and comments, for example: Calling predefined directive: [#list animals as. ---This video is based on the que Jun 10, 2016 · FreeMarker Tutorial. Screwed up my day. e. now and the built-in date operator. For example, the following <#assign someVar = false> <#if someVar??> someVar exists! <#else> someVar is empty </#if> outputs: someVar is empty Although I assume that false should be treated as existing value and thus output should be someVar exists!. The custom exception handler you added doesn't replace the expression with an empty String, it replaces the full if/else expression. To see more about boolean expressions, see: Template Author's Guide/The Template/Expressions. Quick reference guide for working with Freemarker reports within Skyve applications. The default value operator (exp!exp) is not yet in the table because of a programming mistake, which will be only fixed in FreeMarker 2. Dec 4, 2023 · 0 Using FreeMarker, faced such a thing. Apr 2, 2025 · Built-In FreeMarker Date Operations The following expression derives the current date using the FreeMarker special variable reference, . The following example shows using if else directives in FreeMarker. Conditional Value Selection: These functions facilitate the selection of values based on a boolean expression, enhancing template flexibility. string (“str1”, “str2”) Boolean to String with human-readable flags (“str1” = true and “str2” = false). How to check whether particular string starts with hello or ends with Hello or contains hello in apache free marker. Operators with higher precedence are evaluated before operators with a relatively lower precedence. You can nest if directives (of course): Sep 21, 2016 · I'm trying to put a condition in free marker template but it's not working . @RequestMapping(value = PATH, method = RequestMethod. Comprehensive guide to string built-ins in Apache FreeMarker, covering usage and examples for efficient template development. Thread: [FreeMarker-user] Ternary operator? Generates text that depends on changing data (like dynamic HTML). 11 Profile Lhea parameters The method of exporting database files in Android Studio and the solution to Failed to pull selection: open failed: Permission denied css in the attribute Add ?: ternary operator Generates text that depends on changing data (like dynamic HTML). Jun 27, 2013 · Description You can use the list directive to process a section of template for each variable contained within a sequence. 0. what is the difference between the following in freemarker? ! has_content ?? if_exists I used ?? instead of has_content & it lead to such huge issues. 3. there is a problem with angle bracket used for comparison. In general, things between <#if condition> and </#if> tags are skipped if condition is false (the boolean value). Learn how to use the ternary operator in FreeMarker for conditional rendering in templates. To work that around, you can write <#if i < 10 && (i > 2)> or <#if i < 10 && 2 < i> or <#if i < 10 && i > 2>. 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. here is the condidtion <#if "${Model. It Jun 22, 2025 · Here you have told FreeMarker that the ", our beloved leader" should be there only if the value of the variable user is equal to the string "Big Joe". Thus, something like x?switch(1, Write code examples or instructions for the key syntax when using Freemarker templates, primarily for recall retrieval or quick review. You can nest if directives (of course): May 12, 2015 · How to use "or" in freemarker templates Asked 10 years, 4 months ago Modified 7 years, 11 months ago Viewed 26k times See full list on baeldung. DeliveryAddress}" != "TRED" || "${Model. For each such iteration the loop variable will contain the current subvariable. uo7jdq hllz5 bkw yy eam pha 3k0n2a 7kjmh qze p0ituf

Freemarker if or operator. format Converts date-like object to string.