如何检查该数组在Apache FreeMarker中的大小> 1？

Question

I'm trying to implement template with object, that can be plural.

For example: "There is/are n dog(s)." When I tried There <#if dogNames?size>1>is<#else>are</#if> dogNames?size dog<#if dogNames?size>1>s</#if> , I received exception

freemarker.core.NonBooleanException: For "#if" condition: Expected a boolean, but this has evaluated to a number (wrapper: ftSimpleNumber): ==> dogNames?size

ie there is a problem with angle bracket used for comparison.

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. When I declared it like this

String template = "There <#if dogNames?size\">\"1>is<#else>are</#if> dogNames?size dog<#if dogNames?size>1>s</#if>";

and called freemarker api, I received exception

freemarker.core.ParseException: Syntax error in template ...:
Encountered "\">\"", but was expecting one of:
"."
".."
<DOT_DOT_LESS>
"..*"
"?"
"??"
"!"
"["
"("
">"
<TERMINATING_EXCLAM>

I'm using freemarker 2.3.28, java 8

Answer 1

You can write <#if dogNames?size gt 1> . (See https://freemarker.apache.org/docs/dgui_template_exp.html#dgui_template_exp_comparison )