Lightweight: Spring is lightweight when it comes to size and transparency. The basic version of spring framework is around 2MB.Inversion of control (IOC): Loose coupling is achieved in spring using the technique Inversion of Control. The objects give their dependencies instead of creating or looking for dependent objects.
CompilationInitializationExecutionCleanup详细解释Compilation: When a browser asks for a JSP, the JSP engine first checks to see whether it needs to compile the page. If the page has never been compiled, or if the JSP has been modified since it was last compiled, the JSP engine compiles the page.编译的三个步骤:Parsing the JSP.
在 2025 年 5 月底,Spring 团队正式推出了 Spring Boot 4 的预览版,为开发者提供了抢先体验这一全新里程碑版本的机会。Spring Boot 4 构建于与之配套的 Spring Framework 7.0 之上,保持与现代化 Java 生态的高度兼容性:最低要求 Java 17,并向前兼容到即将发布的 Java 25,同时推荐使用 Java 21 以获得更佳的开发体验与长期支持。本文将对 Spring Boot 4 的发布背景、JDK 要求、核心新特性、示例代码以及迁移要点进行超详细的技术解析,为读者全面剖析这一版本的亮点与应用方式。