Currently I\'m putting newlines in strings through one of these two methods:
Not directly in CF, I'll leave it to the CF-Java dudes to say whether you can use a Java method directly on a CF var to achieve what you want, but...
You could use cfsavecontent to put natural line breaks in:
This is line 1
This is line 2
This is line 3
Then check it with:
#Trim(someStr)#
Note that the Trim() is there to get rid of the first and last line breaks if you don't want them.