Does html have this tag? <#if >_html/css_WEB-ITnose

I was looking at the source code of jforum recently and saw that a lot of <#if > were used in his html files, but errors were reported under myeclipse. Please help me with the answer

<tr>		<td class="row1" width="38%"><span class="gen">${I18n.getMessage("Groups.Form.GroupName")}</span></td>		<td class="row2"><input type="text" name="group_name" value="<#if group?exists>${group.name}</#if>" /></td>	</tr>

Below is the error message

Multiple annotations found at this line:	- Invalid character used in text string (<#if group?exists>${group.name}</	 #if>" />).	- Start tag (<input>) not closed.

Reply to the discussion (solution)

The freemarker component is used.

I just encountered this problem, do I need to install the freemarker component