您可以编写自定义注解和验证器来验证@ Path变量

@RestController
    @Validated
    @RequestMapping(value = "/v1/order", produces = MediaType.APPLICATION_JSON_VALUE)
    public class OrderMappingController {
    
            @PutMapping(value = "/{id}/order-mapping", produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)
            public ResponseEntity<?> UpdateOrderMapping(@PathVariable(value = "id") @OrderId  String id,
                                                        @RequestBody @Valid OrderMappingRequest request) {
                //...
            }
        }

创建可使用自定义验证器类OrderIdValidator进行验证的自定义注解OrderId

@Constraint(validatedBy = OrderIdValidator.class)
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.FIELD, ElementType.METHOD,PARAMETER })
public @interface OrderId{
    public String message() default "order id not found ";
    public Class<?>[] groups() default {};
    public Class<? extends Payload>[] payload() default{};
}

然后，您可以编写自定义验证器类，它可以检查业务逻辑是否在db中存在id或任何其他验证

public class OrderValidator implements ConstraintValidator<OrderId, String> {

    @Autowired
    private OrderRepository repository;

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
            return (repository.existsByPeriod(value));

    }
}

我建议尝试一种不同的方法。尽量不要在OrderMappingRequest上标注@Valid，然后为OrderMappingRequest bean实现一个自定义的org.springframework.validation.Validator，然后在OrderMappingController#UpdateOrderMapping方法中注入和调用它。

public class OrderMappingController {

    @Autowired
    private OrderMappingRequestValidator validator

    @PutMapping("/{id}/order-mapping")
    public ResponseEntity<?> UpdateOrderMapping(@PathVariable 
                                                @NotBlank(message = "InvalidID")
                                                @ValidOrderId String id,
                                                @RequestBody OrderMappingRequest request,
                                                BindingResult result) {
        
       validator.validate(request, result);

       if(result.hasErrors()){
          ... do stuff or throw
       }

    }
}