HTTP 메서드 어노테이션

@RestController
@RequestMapping("/api/boards")
public class BoardApiController {       // com.smhrd.controller

    @GetMapping              // GET /api/boards
    public List<Board> list() {
        return service.selectList();
    }

    @GetMapping("/{num}")    // GET /api/boards/3
    public Board view(@PathVariable int num) {
        return service.selectOne(num);
    }

    @PostMapping             // POST /api/boards
    public Board create(@RequestBody Board b) {
        service.insert(b);
        return b;
    }

    @PutMapping("/{num}")    // PUT /api/boards/3
    public Board update(@PathVariable int num, @RequestBody Board b) {
        b.setNum(num);
        return service.update(b);
    }

    @DeleteMapping("/{num}") // DELETE /api/boards/3
    public void delete(@PathVariable int num) {
        service.delete(num);
    }
}

Run on Server 또는 javac+java 로 실행하고 결과를 확인합니다.