Spring Could not Resolve placeholder

Question

I\'m fairly new to spring so excuse me if this is a dumb question. When I try to launch a program I get the following error: java.lang.IllegalArgumentException: Could

Answer 1

My solution was to add a space between the $ and the {.

For example:

@Value("${appclient.port:}")

becomes

@Value("$ {appclient.port:}")