REST API Articles
Articles covering REST API design, error handling, input validation, authentication, pagination, and other key backend implementation topics.
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Implementing CRUD REST API with Spring Boot - Basic Structure of Controller, Service, and Repository
A step-by-step guide to implementing CRUD (Create, Read, Update, Delete) REST API with Spring Boot. Build the three-layer architecture of Controller, Service, and Repository from scratch, and walk through setting up all four endpoints: GET, POST, PUT, and DELETE.
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How to Auto-Generate REST API Documentation Using OpenAPI (Swagger UI) with Spring Boot
A practical guide covering the introduction of springdoc-openapi, enhancing documentation with annotations, configuring Bearer token for JWT-authenticated endpoints, and YAML output.
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How to Call REST APIs in Spring Boot - When to Use RestTemplate vs WebClient
A practical guide to the two main approaches for calling external REST APIs in Spring Boot: RestTemplate and WebClient. Covers basic usage, criteria for choosing between them, timeout configuration, and error handling.
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How to Implement Stateless Authentication with Spring Security + JWT
A practical guide to integrating JWT authentication into a Spring Boot REST API from scratch. Step-by-step walkthrough covering token generation, validation, JwtAuthenticationFilter implementation, SecurityFilterChain configuration, and verification — with a focus on code.
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How to Implement Pagination in Spring Boot REST API - Using Pageable and Page
Step-by-step guide to implementing REST API pagination using Spring Data JPA's Pageable and Page. Covers page specification via query parameters, sort conditions, custom response formats, and error handling with practical code examples.