エラー

An exception occurred processing JSP page /page/pager.jsp at line 7 4: <% Pager pager = (Pager)request.getAttribute( "pager" );%> 5: 6: <% if( pager != null ){ %> 7: <% for( PageUrl pageUrl: pager.getPageUrls() ){ %> 8: 9: <% if( pageUrl.position != PageUrl.Position.current ){ %> 10: Stacktrace: