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REST API Controllers

April 5, 2026

Building REST Endpoints

Create RESTful services with @RestController annotations.

Controller Pattern

@RestController
@RequestMapping("/api/products")
public class ProductController {
    @GetMapping public List getAll() { }
    @GetMapping("/{id}") public Product getOne() { }
    @PostMapping public Product create() { }
    @PutMapping("/{id}") public Product update() { }
    @DeleteMapping("/{id}") public void delete() { }
}

Best Practices

  • ResponseEntity for status codes
  • @Valid for request validation
  • Exception handling with @ControllerAdvice
  • HATEOAS links
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