@ConfigurationProperties Spring Boot Configuration Annotation Processor not found in classpath

Question

I try to make completion for custom properties in Spring Boot.

I tried to create a simple project via IntelliJ IDEA 2016.3:

1. Created a new G

Answer 1

I forgot to add propdeps-plugin. However, I remember that it didn't work for me even with the plugin on 2016.3, So as @CrazyCoder mentioned, try to downgrade Gradle or download the new 2017.1 version (details).
Also you may receive Re-run Spring Boot Configuration Annotation Processor to update generated metadata when you will solve this issue. For this, click Refresh all Gradle projects (in Gradle side menu).