Comprehensive application framework and inversion of control container for the Java platform providing dependency injection, AOP, data access, transaction management, and web framework capabilities

Spring Transaction module providing comprehensive transaction management infrastructure for imperative and reactive applications

Comprehensive testing support for Spring Framework applications including integration testing, mock objects, and test utilities

Spring Object/XML Marshalling support providing generic interfaces for converting Java objects to XML and vice versa

Spring Object/Relational Mapping integration for JPA and Hibernate with transaction management

Spring Messaging is a foundational module providing comprehensive support for message-based application architectures through a unified messaging abstraction.

Spring JMS integration module that simplifies JMS development by providing template-based messaging, message-driven POJOs, declarative transaction management, and comprehensive exception handling

Spring JDBC module providing database access capabilities including JDBC templates, transaction management, and database operations

Spring's optimized Commons Logging bridge with automatic detection of Log4J 2, SLF4J, and java.util.logging

Spring Framework Bill of Materials (BOM) that provides centralized dependency management for all Spring Framework modules and third-party dependencies

Spring Expression Language (SpEL) provides a powerful expression language for querying and manipulating object graphs at runtime.

Spring Framework Core - IoC Container and Dependency Injection

Spring Context module providing core application context functionality for dependency injection, lifecycle management, event-driven architecture, task scheduling, caching, validation, and cross-cutting concerns in Spring-based applications

Spring Framework integration support for caching (Caffeine, JCache), mail (JavaMail), scheduling (Quartz), and template engines (FreeMarker)

Spring annotation processor for generating component metadata indexes to optimize application startup performance

Spring Beans - IoC Container and Dependency Injection providing comprehensive bean management infrastructure and dependency injection capabilities.

Spring AOP module providing aspect-oriented programming capabilities for the Spring Framework

Spring Security Web module provides comprehensive web security features for Spring-based applications, including servlet-based authentication, authorization, CSRF protection, session management, and security filter chain implementation

Spring Security Test provides comprehensive testing utilities for Spring Security applications with mock authentication, security context testing, and web security testing features.

Spring Security Remoting provides security services for remote method invocation in distributed Spring applications including RMI context propagation, HTTP invoker authentication, and DNS resolution utilities.