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Allow a custom JsonFactory to be used with JsonMapper.Builder

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This commit improves the auto-configuration of the JSonMapper.Builder
to accept a custom JsonFactory if a bean of this type is present.

Closes gh-48594
This commit is contained in:
Stéphane Nicoll
2025-12-29 13:11:03 +01:00
parent 2c55ccfa7f
commit 22d6f6a7de
3 changed files with 26 additions and 3 deletions
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documentation/spring-boot-docs/src/docs/antora/modules/how-to/pages/spring-mvc.adoc
+2 -1
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@@ -106,7 +106,8 @@ This environment-based configuration is applied to the auto-configured javadoc:t
To ease the migration when working on an application that previously used Jackson 2, the auto-configured `JsonMapper` can be configured to use defaults that are as close as possible to those that Spring Boot used for Jackson 2. To enable these defaults, set configprop:spring.jackson.use-jackson2-defaults[] to `true`.
The context's javadoc:tools.jackson.databind.json.JsonMapper$Builder[] can be customized by one or more javadoc:org.springframework.boot.jackson.autoconfigure.JsonMapperBuilderCustomizer[] beans.
If a javadoc:tools.jackson.core.json.JsonFactory[] bean is present, it is used by the context's javadoc:tools.jackson.databind.json.JsonMapper$Builder[].
The builder can also be customized by one or more javadoc:org.springframework.boot.jackson.autoconfigure.JsonMapperBuilderCustomizer[] beans.
Such customizer beans can be ordered (Boot's own customizer has an order of 0), letting additional customization be applied both before and after Boot's customization.
Any beans of type javadoc:tools.jackson.databind.JacksonModule[] are automatically registered with the auto-configured javadoc:tools.jackson.databind.json.JsonMapper$Builder[] and are applied to any javadoc:tools.jackson.databind.json.JsonMapper[] instances that it creates.