如何在springboot中引入参数校验

<!--1.导入JSR303规范-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>

public class Dept {
    private Integer id; //ID
    @NotNull
    private String name; //部门名称
    private LocalDateTime createTime; //创建时间
    private LocalDateTime updateTime; //修改时间
}

  @PostMapping("/depts")
    public Result addDept( @RequestBody @Validated Dept dept){
        //这里应该判断是否返回成功
        deptService.addDept(dept);
        return Result.success();
    }

@RestControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ErrorResponse> handleValidationException(MethodArgumentNotValidException ex) {
        BindingResult bindingResult = ex.getBindingResult();
        List<String> errors = bindingResult.getFieldErrors().stream()
                .map(FieldError::getDefaultMessage)
                .collect(Collectors.toList());
        ErrorResponse response = new ErrorResponse("Validation Failed", errors);
        return ResponseEntity.badRequest().body(response);
    }
}

@RestController
@RequestMapping("/users")
public class UserController {
    @PostMapping
    public ResponseEntity<String> createUser(@Validated @RequestBody User user, BindingResult result) {
        if (result.hasErrors()) {
            // 获取字段错误列表
            List<FieldError> fieldErrors = result.getFieldErrors();
            // 遍历字段错误列表，输出错误信息
            for (FieldError error : fieldErrors) {
                String fieldName = error.getField();
                String errorMessage = error.getDefaultMessage();
                System.out.println("字段名：" + fieldName + "，错误信息：" + errorMessage);
            }
            return ResponseEntity.badRequest().body("参数校验失败");
        }
        // 校验通过，处理创建用户的逻辑
        return ResponseEntity.ok("用户创建成功");
    }
}