Upgrade Camel to spring-boot 4

[cunningt]

Description

This is a PR for spring-boot 4 upgrade work. It upgrades jackson to 2.20.2, it changes all components over to using camel-test-junit-6, and makes a number of other upgrades necessary for the move to spring boot 4.

Related issues :
https://issues.apache.org/jira/browse/CAMEL-22728
https://issues.apache.org/jira/browse/CAMEL-22729
https://issues.apache.org/jira/browse/CAMEL-22730

Target

• [ x] I checked that the commit is targeting the correct branch (Camel 4 uses the main branch)

Tracking

• If this is a large change, bug fix, or code improvement, I checked there is a JIRA issue filed for the change (usually before you start working on it).

Apache Camel coding standards and style

• I checked that each commit in the pull request has a meaningful subject line and body.

• [ x] I have run mvn clean install -DskipTests locally from root folder and I have committed all auto-generated changes.

[github-actions]

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[davsclaus]

if you keep this up to date then SB 4.0.1 has been released

[cunningt]

Updated to spring-boot 4.0.2, all checks passed on 2/4/2026. Will rebase and upgrade to spring-boot 4.0.3 after release (2/19/2026).

[davsclaus]

LGTM

@cunningt you are welcome to merge

[davidkarlsen]

Which camel version will this be in? 4.19? And when is that scheduled for release?

[oscerd]

4.19.0 Il sab 21 feb 2026, 14:25 David J. M. Karlsen ***@***.***> ha scritto:

…

*davidkarlsen* left a comment (apache/camel#20055) <#20055 (comment)> Which camel version will this be in? — Reply to this email directly, view it on GitHub <#20055 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABG6XV5JA7JSNSNQHT5M6KL4NBMDPAVCNFSM6AAAAACNE6EVWOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTSMZYG43TKMRSGA> . You are receiving this because you commented.Message ID: ***@***.***>

[oscerd]

4.19.0