Properties File Variable Concatenation

Question

I have a properties file where I'd like to define a file path as a variable and then reference it. This is causing a file not found exception:

test.folder=C:/code/
file={test.folder}File.csv

But this works:

file=C:/code/File.csv

What am I doing wrong?

variable substitution does not work in standard property files. You must implement this yourself or find a library doing this for you. see http://stackoverflow.com/questions/872272/how-to-reference-another-property-in-java-util-properties — Hank Lapidez, Jul 28 '14 at 20:07

score 9 · Answer 1 · edited Jan 05 '15 at 10:43

9

This should works:

test.folder=C:/code/

file=${test.folder}File.csv

edited Jan 05 '15 at 10:43

matsjoyce

answered Jan 05 '15 at 10:19

user4419622

score 4 · Answer 2 · answered Oct 25 '17 at 07:46

In properties file i didn't think that you can concatenate the variable but you can do something like the following:

config.properties

test.folder=C:/code/
file=File.csv

Then in your java code concatenate two variable:

filePath = folder + file;

and if you are using spring xml file you can use:

<property name="filePath" value=${test.folder}${file} />

2 Answers2