java - Adding cssErrorClass to a div -

i using twitter bootstrap spring webapp.

i added validation , want add error class div.controlgroup if validation fails.

part of view:

<div class="control-group">     <form:label cssclass="control-label" path="subject" csserrorclass="inputerror">subject</form:label>     <div class="controls">         <form:input path="subject"/>         <span class="help-block"><form:errors path="subject" /></span>     </div> </div> 

part of controller:

@requestmapping(value="/add", method = requestmethod.post) public string addtask(@modelattribute("task") task task, bindingresult result) {     if (result.haserrors()) {         return "tasks";     }     taskrepository.save(task);     return "redirect:/"; } 

i able add error class div using <spring:bind>

<spring:bind path="task.duedate"> <div class="control-group${(not empty status.errormessage) ? ' error':''}"> </spring:bind>     <form:label cssclass="control-label" path="duedate" csserrorclass="inputerror">due date</form:label>     <div class="controls">         <form:input path="duedate"/>         <span class="help-block"><form:errors path="duedate" /></span>     </div> </div>