CODEWITHSUNDEEP
freemarkertemplate-enginestring-concatenation
user1097772
user1097772

Reputation: 3529

Concatenation strings in freemarker

How can I concatenate strings in freemarker?

This doesn't work.

    <#function foo input>
<#local str="Hello ">
${str} = ${str} + ${" world"}

<#return str>
</#function>

${foo("a")}

Here is online evaluator:
http://freemarker-online.kenshoo.com/

Edit: To make it clear I need to use it with variables, to be able write something like this.


public String sayHello() {return "Hello";}
public String sayWorld() {return "world"};
public String sayPeople() {return "people";}

public void main() { 
 String str = "";
 str += sayHello();
 str += "";
 str += sayWorld();
 str += "";
 str += sayPeople();

 return str;
}

Upvotes: 6

Views: 20744

Answers (1)

ddekany
ddekany

Reputation: 31112

Like <#return "Hello " + input + "!">, or <#return "Hello ${input}!">. If you try to print to the output inside a #function (as opposed to inside a #macro), it will be ignored.

Edit: Analogously with the Java example added:

<#function concatDemo>
 <#local str = "">
 <#local str += sayHello()>
 <#local str += " ">
 <#local str += sayWorld()>
 <#local str += "!">
 <#return str>
</#function>

<#function sayHello><#return "Hello"></#function>
<#function sayWorld><#return "World"></#function>

${concatDemo()}

Upvotes: 6

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