🚀 Spring Boot Tutorials
This page collects all Spring Boot articles from Spring Java Lab in one place. Start with REST basics (controllers, JSON responses, annotations), then move on to real-world topics like global exception handling, CRUD APIs with databases, and file upload + download. Many examples also integrate with Spring Batch for backend processing.
🧩 Core Spring Boot REST APIs
🔀 @Controller vs @RestController
Understand the difference between @Controller and @RestController in Spring Boot with
examples of MVC views vs pure JSON REST APIs.
📤 Returning JSON from REST APIs
Learn how Spring Boot converts Java objects to JSON, how to use @ResponseBody, and how to control
HTTP status codes and response structure.
🏷️ REST API Annotations Cheat Sheet
Quick reference for important REST annotations like @GetMapping, @PostMapping,
@RequestBody, @PathVariable, and more.
🌐 Global Exception Handling
Use @ControllerAdvice and @ExceptionHandler to return consistent error JSON from all
your Spring Boot REST controllers.
🗄️ Spring Boot with Database, File Upload & Batch
📂 File Upload + Download + DB
Build a Spring Boot REST API to upload files with MultipartFile, store them as BLOBs in
MySQL / Oracle, and download them back with proper content type.
🛠️ CRUD API with Oracle Database
Step-by-step guide to build a Spring Boot CRUD REST API using JPA and Oracle DB, including entity, repository, service and controller layers.
⚙️ Spring Boot Tasklet with Spring Batch
Learn how to run custom job logic using Tasklet-based steps in Spring Batch with Spring Boot, ideal for simple one-off tasks like file cleanup or DB scripts.
🌀 Spring Batch Core Components
Deep dive into Job, Step, JobInstance, JobExecution and StepExecution so you can design robust batch jobs in Spring Boot applications.
📄 Export Data to CSV with Spring Batch
Use Spring Batch to read data from a database and write it to CSV files, with chunk processing and restartable job configuration.
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