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Editorial Team
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Asked: 2026-05-30T11:06:45+00:00

I have 2 variables in parameters map populated from a struts2 tag, as follows:

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I have 2 variables in parameters map populated from a struts2 tag, as follows:

  1. obj – A java object with various child objects. It can be treated as a hash in freemarker template.
  2. displayProperty – A string containing property name inside the obj. The name can be object graph containing multiple levels of drill down.

I want to display the given property of the obj using freemarker template. For example if displayProperty is entity.name, then it should essentially print value of obj.entity.name.

My freemarker template is ${obj[displayProperty]}, but it fails when displayProperty contains a dot.

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1 Answer

  1. Editorial Team

    One solution would be ('obj.' + displayProperty)?eval, although it involves generic expression parsing and so is not the fastest. The fastest running solution would be to create a custom method (TemplateMethodModelEx implementation) that you could use like ${walkProperty(obj, displayProperty)}, which would split the string at the dots, and call TempalteHashModel.get in a loop.

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