Spring When spring.jackson.date-format and WebMvcConfigurationSupport are used at the same time, it will not take effect

I want to use spring.jackson.date-format=yyyy-MM-dd HH:mm:ss to set the time format, but at the same time, my project has customized org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport, and theyyyy-MM-dd HH:mm:ss is no longer effective

please see demo: https://github.com/brucelwl/demo/tree/bug

Digression: there are more and more redundant automatic assembly of Springboot. I hope springboot can simplify these configuration classes, such as org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration and org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration. Spring has helped us to implement it

Comment From: mdeinum

Which is as expected. The usage of WebMvcConfigurationSupport indicates to Spring Boot that you have configured the web part and it will stop applying the auto-configuration. With that it also stops configuring Jackson and thus the use of the spring.jackson.date-format.

Instead of extending the WebMvcConfigurationSupport your class should implement WebMvcConfigurer and override the methods you need.

Comment From: brucelwl

Thanks @mdeinum

Comment From: snicoll

Thanks @mdeinum