Feature of Spring Expression Language (SpEL):-
There are several features exist with SpEL.The expression language supports
the following functionality
1 Literal expressions
2 Boolean and relational operators
3 Regular expressions
4 Class expressions
5 Accessing properties, arrays, lists, maps
6 Method invocation
7 Relational operators
8 Assignment
9 Calling constructors
10 Bean references
11 Array construction
12 Inline lists
13 Ternary operator
14 Variables
15 User defined functions
16 Collection projection
17 Collection selection
18 Templated expressions
19 Inline maps