Spring Boot Tutorial 0/110 lessons ~6 min read Lesson 18“Production-grade backends”

JSON Handling

Spring Boot ships with Jackson for JSON.

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Focus

3 guided sections

Practice signal

Examples included

Career prep

Foundation builder

Introduction

Spring Boot ships with Jackson for JSON. It auto-serialises any record/POJO and deserialises request bodies. Tuning Jackson once at startup is enough for most apps.

Syntax reference

Per-field control with annotations:

public record OrderDto(
    Long id,
    @JsonProperty("created_at") Instant createdAt,
    @JsonIgnore String internalNote
) {}

Informative example

Common Jackson tweaks:

bash

# application.yml
spring:
  jackson:
    default-property-inclusion: non_null   # drop nulls
    serialization:
      write-dates-as-timestamps: false     # ISO-8601 strings
    deserialization:
      fail-on-unknown-properties: false    # be lenient with extras
    property-naming-strategy: LOWER_CAMEL_CASE

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