Java - 在特殊情况下关闭类字段的 Spring 验证

Question

在我当前的实现中，SpecialTransactionDTO 的两个字段(transactionMetric 和 transactionRank)的验证在所有情况下都有效。现在，我作为 @RequestBody 接收的其父类 TransactionDTO 包含一个 boolean 字段 shouldValidate ，指示是否验证 SpecialTransactionDTO 的两个字段。

当 shouldValidate 标志的值为 false 时，我应该如何配置(关闭)验证？

@PostMapping("{id}/transaction/")
@ApiOperation(value = "Create transaction", httpMethod = "POST", response = TransactionDTO.class)
public ResponseEntity<Object> createTransaction(@PathVariable("id") Long accountId,
                                                  @Validated({TransactionNumber.class})
                                                  @RequestBody TransactionDTO transaction)
    throws NotFoundException, URISyntaxException {

    TransactionDTO result = transactionService.createTransaction(accountId, transaction);

    return ResponseEntity.created(new URI("api/userAccount/" + accountId)).body(result);
}

<小时/>

@JsonSubTypes({
    @JsonSubTypes.Type(value = SpecialTransactionDTO.class, name = SpecialTransactionDTO.TYPE),
    @JsonSubTypes.Type(value = TransactionDTO.class, name = TransactionDTO.TYPE)
})

public class TransactionDTO {

    @NotNull
    private Long id;

    @NotNull
    private String transactionInitiator;

    private Boolean shouldValidate;
    private String transactionCode;
}

public class SpecialTransactionDTO extends TransactionDTO {

    @NotNull
    private Long userId;

    @Pattern(regexp = "0|\\d{8,11}")
    private String transactionMetric;

    @Pattern(regexp = "\\d{1,3}")
    private String transactionRank;
}

Answer 1

您可以完全消除 @Validated 注释并模仿 Spring 的行为，如下所示:

@PostMapping("{id}/transaction/")
@ApiOperation(value = "Create transaction", httpMethod = "POST", response = TransactionDTO.class)
public ResponseEntity<Object> createTransaction(@PathVariable("id") Long accountId,
                                                @RequestBody TransactionDTO transaction)
    throws NotFoundException, URISyntaxException, MethodArgumentNotValidException {

    // Check if we should validate here. Spring will convert your MethodArgumentNotValidException into HTTP 400
    if(transaction.shouldValidate) {
        SpringValidatorAdapter adapter = new SpringValidatorAdapter(validator);
        BeanPropertyBindingResult result = new BeanPropertyBindingResult(transaction, transaction.getClass().getName());
        adapter.validate(transaction, result, TransactionNumber.class);
        if (result.hasErrors()) {
            throw new MethodArgumentNotValidException(null, result);
        }
    }    


    TransactionDTO result = transactionService.createTransaction(accountId, transaction);

    return ResponseEntity.created(new URI("api/userAccount/" + accountId)).body(result);
}