问题
Let's say I have Freemarker variable A that contains the name of another variable on the hash tree, say. "B." I'd like to use a to read the value of B so, for example, if B contained "C" I could tell Freemarker to output C using A: ${${A}}
should result in the output of "C". Naturally, this doesn't work in Freemarker, but is there a way to accomplish this?
回答1:
Use the .vars special variable, which is a hash (map) of the variables, and hence you can use the aHash[aKeyExpression] syntax:
${.vars[A]}
via Daniel Dekany, documentation author & maintainer
来源：https://stackoverflow.com/questions/2648933/can-a-freemarker-interpolation-contain-an-interpolation