At once I will say that I use SpEL on JSP, to select the necessary data for display.

Suppose we have:

public class Foo {List<Bar> listBar;...}

Somewhere in the controller:

 List<Foo> listFoo = ... model.addAttribute("listFoo", listFoo);

How to write SpEL to get a List<Bar> from the entire collection? Can be obtained from a single item:

 <spring:eval expresson = "foo.listBar"/>

You can get a List<List<Bar>> :

 <spring:eval expresson = "listFoo.![listBar]"/>

but it is a two-dimensional array. And it is necessary to glue these collections together, getting one-dimensional, as if we used the addAll(Collection c) method for the new collection.

Is it possible to do this somehow?

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