Spring Boot

Building REST APIs with Spring Boot

Create RESTful web services using Spring Boot.

Creating a REST Controller

A complete CRUD REST API example:

Java

@RestController
@RequestMapping("/api/products")
public class ProductController {

    @Autowired
    private ProductService productService;

    @GetMapping
    public List<Product> getAllProducts() {
        return productService.findAll();
    }

    @GetMapping("/{id}")
    public ResponseEntity<Product> getProduct(@PathVariable Long id) {
        return productService.findById(id)
            .map(ResponseEntity::ok)
            .orElse(ResponseEntity.notFound().build());
    }

    @PostMapping
    public ResponseEntity<Product> createProduct(@RequestBody Product product) {
        Product saved = productService.save(product);
        return ResponseEntity.status(HttpStatus.CREATED).body(saved);
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<Void> deleteProduct(@PathVariable Long id) {
        productService.deleteById(id);
        return ResponseEntity.noContent().build();
    }
}

Auto Configuration

Request & Response Handling