How I hide empty Velocity variable names?

Question

I am using Struts + Velocity in a Java application, but after I submit a form, the confirmation page (Velocity template) shows the variable names instead an empty label, like the Age in following example:

Name: Fernando

Age: {person.age}

Sex: Male

I would like to know how to hide it!

Answer 1

You can mark variables as "silent" like this:

$!variable

If $variable is null, nothing will be rendered. If it is not null, its value will render as it normally would.

Answer 2

You will also need to be sure and use the proper syntax. Your example is missing the dollar before the variable. It should be $!{person.age}, not just {person.age}.