如何使用freemarker遍历变量名

Question

I have a few variables that i passed from Java to FTL file. eg variable1, variable2, variable 3

How can i retrieve the value for these variables using a loop? Below is the sample code. It is not working correctly though.

<#assign x=3>
<#list 1..x as i>
  ${abc+1}
</#list>  

Thank you.

Answer 1

Dynamic variable names can be used through special hash variable .var (and .data_model ) combined with the [] operator:

<#assign x=3>
<#list 1..x as i>
  ${.vars['abc'+ i?c]}
</#list>  

Answer 2

For me, it worked like this:

<#assign x=3>
<#list 1..x as i>
     variable_name:${.vars['variable'+i]}
</#list>

Output:

variable_name: (value of variable1) variable_name: (value of variable2) variable_name: (value of variable3)

If you just want to print variable1, variable2, variable3

<#assign x=3>
<#list 1..x as i>
     ${'variable'+i}
</#list>

Output: variable1 variable2 variable3