Stop Writing Manual if‑else: Master Spring Boot Partial Updates with @JsonMerge

This article explains how to avoid null‑overwrites during partial updates in Spring Boot by using Jackson's @JsonMerge annotation, demonstrates handling of nested objects and null values with @JsonSetter, and shows how to create a custom @JsonMergePatch argument resolver for clean controller code.

@JsonMergeArgument ResolverJackson

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Stop Writing Manual if‑else: Master Spring Boot Partial Updates with @JsonMerge

Spring Full-Stack Practical Cases

Oct 29, 2025 · Backend Development

Mastering Partial Updates in Spring Boot 3: @JsonMerge & @JsonSetter Explained

This article demonstrates how to implement elegant partial updates in Spring Boot 3 by combining @JsonMerge and @JsonSetter(nulls = Nulls.SKIP), addressing null‑value handling, reducing boilerplate code, and ensuring nested objects and maps are merged correctly.

@JsonMergeJsonSetterPartial Update

0 likes · 8 min read

Mastering Partial Updates in Spring Boot 3: @JsonMerge & @JsonSetter Explained