How to take values of Jmeter variable in coma separated way

I'm hitting a rest Api through http GET request in jmeter. the url is like http://hostName:port/searchParameter=value1,value2,value3

the value1, value2 ... are taken from a file which is like

File.csv value1 value2 value3

this csv file is not really coma seperated values they are in separate lines. Now how to achieve this