Spring Cloud Data Flow Add TimeStamp to File Name

Question

I am trying to use the out of the box file Source and Sink stream applications with Spring Cloud data flow. I am trying to move a file from one folder to another. When the file arrives at the sink I would like to rename it and append a date or timestamp to the file name. How do I do this? I assume the name-expression field but I am not sure what values this can take. Anything I try in this field seems to cause an error.

I would like the file to be something like test20191122.txt

Answer 1

Something like...

'test' + new java.text.SimpleDateFormat('yyyyMMdd').format(new java.util.Date()) + '.txt'

...should work.