Up to Spring Boot 2.1.x it was possible to have a class that implements both org.springframework.core.convert.converter.Converter and org.springframework.format.Formatter.
However, since 2.2.x it is not possible anymore.
In my project a Bean (@JsonComponent) was implementing both interfaces and with a change from 2.1.x to 2.2.x Spring started complaining that there was no Converter registered to convert my Request Parameters from String to the given class.
As soon as I remoe the Converter interface the converter is used again.
Ideally Formatter and Converter interface should be compatible again. If not possible a warning in the javadoc of both interfaces and in the Spring Docs would be usefull.
Comment From: bclozel
From the description of this issue, it's not clear what is causing the regression you're seeing here, nor whether it's not possible to implement both interfaces or if it's an infrastructure setup issue.
Could you provide a sample application that demonstrates the issue? Something really basic that works with 2.1.x and fails with 2.2.x. Thanks!
Comment From: spring-projects-issues
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Comment From: spring-projects-issues
Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.