Spring Framework 5.2.0.M1 releases: bug fixes

Spring Framework

The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications – on any kind of deployment platform.

A key element of Spring is infrastructural support at the application level: Spring focuses on the “plumbing” of enterprise applications so that teams can focus on application-level business logic, without unnecessary ties to specific deployment environments.Spring Framework



  • Core technologies: dependency injection, events, resources, i18n, validation, data binding, type conversion, SpEL, AOP.
  • Testing: mock objects, TestContext framework, Spring MVC Test, WebTestClient.
  • Data Access: transactions, DAO support, JDBC, ORM, Marshalling XML.
  • Spring MVC and Spring WebFlux web frameworks.
  • Integration: remoting, JMS, JCA, JMX, email, tasks, scheduling, cache.
  • Languages: Kotlin, Groovy, dynamic languages.

Changelog v5.2.0.M1

This first milestone is packed with features and fixes, including:

  • Many core container improvements, from parsing annotation data with the new MergedAnnotations API to @Configuration class optimizations
  • Support for Kotlin coroutines
  • New WebMvc.fn programming model in the spring-webmvc module providing a functional alternative to annotated controllers that’s built on the Servlet API. Now spring-webmvc like spring-webflux offers both functional and annotation-based programming models.
  • Performance improvements in Spring MVC and Spring WebFlux to reduce overhead in request mapping, media type parsing, CORS checks, and more
  • RSocket support including response handling via annotated @MessageMapping methods and performing requests via RSocketRequester.
  • Many interesting integration testing improvements, especially if you’re dealing with application and context events in tests
  • A brand new look for our reference documentation