这是 Spring的自定义 ObjectMapper 的文档，这是它说的是：

Here's Spring's documentation for customised ObjectMapper, this is what it says:

如果你想完全替换默认的ObjectMapper，
定义一个 @该类型的Bean 并将其标记为 @Primary ，或者，如果您更喜欢
基于构建器的方法，请定义Jackson2ObjectMapperBuilder
@Bean 。请注意，在任何一种情况下，这都将禁用ObjectMapper的所有
自动配置。

If you want to replace the default ObjectMapper completely, either define a @Bean of that type and mark it as @Primary, or, if you prefer the builder-based approach, define a Jackson2ObjectMapperBuilder @Bean. Note that in either case this will disable all auto-configuration of the ObjectMapper.

如果定义 ObjectMapper bean没有帮助，您可以尝试定义 Jackson2ObjectMapperBuilder bean吗？

If defining ObjectMapper bean does not help, could you try defining Jackson2ObjectMapperBuilder bean instead?

另外，您是否可以尝试将bean定义为使用 @Configuration 注释的类？

Also, could you try defining the beans into a class annotated with @Configuration?