How to format a date in VisualForce?

APEX Class:

public List<Attachment> getCaseAttachmentList(){

  if(caseId != null && caseId != '') {

 string attachCaseQry = 'Select Id, Name, Body, CreatedDate From Attachment where ParentId = \''+caseId+ '\'';

 caseAttachmentList = (List<Attachment>)Database.query(attachCaseQry);

 system.debug('Attachment Result:' + caseAttachmentList);

 

  }

  return caseAttachmentList;

}

VisualForce Page:

<apex:repeat value="{!CaseAttachmentList}" var="attachmentCaseObj"> 

<apex:outputText value="{0,date,MM'/'dd'/'yyyy}">

<apex:param value="{!attachmentCaseObj.CreatedDate}" /> 

</apex:outputText>

<br />

</apex:repeat>

Output:

03/30/2012

04/02/2012

04/01/2012