SPRINGMVC pass multiple object values to the foreground

By design discovery, if you just pass a value, you can

M.setattribute ("Data", data);

To pass, but if it is a multiple object value, it is common to use the map collection to load the data

Map.put ("page", page);

Map.put ("milist", list);

M.addattribute ("map", map);

Reception at the front desk is

<c:if test= "${map.page.hasfirst! = null}" >
<a> Home </a>
</c:if>

That is, through hierarchical relationships continue to look down.

SPRINGMVC pass multiple object values to the foreground