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I am trying to create web app using spring boot, maven and java 12. I started the project with spring-boot-starter-parent version 2.1.5.RELEASE, java 12 and maven-compiler-plugin version 3.8.1. I tried to run ./mvnw package but i got this error:

Fatal error compiling: invalid target release: 12

After that i wrote on the internet that maven compiler plugin uses old dependency for asm and i should specify new version of it. So i selected the latest version of asm which is 7.1 and i added configuration tag with properties release 12 and compilerArgs --enable-preview for java 12. The result was:

Fatal error compiling: invalid flag: --release

The next thing that i tried was to use spring boot starter parent version 2.2.0.M3 and to specify the repository to find milestone versions of spring from http://repo.spring.io/milestone. Unfortunately i got the same result. Any ideas?

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