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IoC Container Inversion of Control The IoC container serves as the practical implementation of the IoC design pattern in Spring. Components managed by the IoC container are referred to as beans. Before creating a bean, the IoC container must be instantiated first. Spring provides two primary implementations: ① BeanFactory The fundamental implem ...

MyBatis supports two development approaches: XML-based and annotation-based. The annotation approach further splits into two variants, resulting in three distinct writing styles. Three Implementation Approaches 1. XML-Based Approach Define the mapper interface: public interface UserMapper { Integer queryAgeByName(String name); } Correspond ...

In modern distributed systems and microservice architectures, the separation of frontend and backend is common. The overall system architecture is typically structured as follows: Note: This article focuses on API interface design. Other components like gateways, caches, and message queues are omitted for clarity. Interface Interaction The fr ...

While XML configuration remains the predominant approach in MyBatis, annotation-based development offers a streamlined alternative that is widely adopted across other frameworks in the ecosystem. Defining Mapper Interfaces with Annotations Annotate methods directly on the interface to specify SQL queries: public interface UserDao { @Se ...

Core Cache Annotations Spring Boot simplifies data caching through a declarative approach. To utilize the cache abstraction, ensure the @EnableCaching annotation is present on a configuration class. The framework manages storage based on method-level annotations. Retrieving Cached Results The @Cacheable annotation applies to read operations. Wh ...

Transaction management belongs logically in the service layer. Spring supports two primary approaches: Programmatic transaction management (for advanced use cases) Declarative transaction management (recommended for most applications) Declarative transactions can be implemented either via XML configuration or annotations — the latter being th ...

Creating a Basic Servlet To begin learning Servlet development, we start with a simple Hello World example. Create a dynamic web project in you're IDE, then define a new Servlet class. package com.example.demo; import java.io.*; import javax.servlet.*; import javax.servlet.annotation.WebServlet; import javax.servlet.http.*; @WebServlet(" ...