The new rules in SonarQube Server 2025 Release 2 for Spring Framework applications aim to improve code quality and enforce best practices. These rules cover various aspects of Spring development, including event handling, scheduling, data, MVC, caching, dependency injection, and testing. The rules check for potential issues such as incorrect usage of `@EventListener` methods, `@Scheduled` annotation on non-arg methods, `@InitBinder` methods returning a value, method return types in Spring Data Repository queries, combination of `@Cacheable` and `@CachePut` annotations, injecting data into static fields, and misuse of `@DirtiesContext` modes. By following these rules, developers can write high-quality Spring applications with improved maintainability, readability, and reliability. SonarQube provides a series of rules to help developers ensure their Spring applications are structured correctly, leading to higher quality and more efficient codebases.