[FIXED] How to depend Spring with Jackson and without Web

Issue

How to properly connect jackson to a standalone SpringBoot application without unnecessary dependencies (web)?

Java 18

plugins {
    id 'org.springframework.boot' version '2.7.5-SNAPSHOT'
    id 'io.spring.dependency-management' version '1.0.13.RELEASE'
    id 'java'
}

dependencies {
  implementation 'org.springframework.boot:spring-boot-starter'
  implementation 'org.springframework.boot:spring-boot-starter-json:2.7.5-SNAPSHOT'
  compileOnly 'org.projectlombok:lombok'
  developmentOnly 'org.springframework.boot:spring-boot-devtools'
  annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
  annotationProcessor 'org.projectlombok:lombok'
  testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

Solution

Spring Boot's auto-configuration for Jackson requires spring-web as it's the Spring Framework module that contains the infrastructure for configuring and creating a Jackson ObjectMapper. If you really don't want a spring-web dependency in your application, you could replace the dependency on spring-boot-starter-json with a direct dependency on Jackson instead, however you will then have to configure and create the ObjectMapper yourself as Spring Boot will no longer do it for you.

Answered By - Andy Wilkinson
Answer Checked By - Marilyn (JavaFixing Volunteer)