[英]SpringBoot: Validation without @Valid annotation
I have a web socket handler inherited from AbstractWebSocketHandler
that handles text messages.我有一个从处理文本消息的
AbstractWebSocketHandler
继承的 web 套接字处理程序。 My DTOs use javax.validation.constraints
for validation.我的 DTO 使用
javax.validation.constraints
进行验证。 So, in my REST endpoints, I simply can use the @Valid
annotation to invoke the validator.因此,在我的 REST 端点中,我只需使用
@Valid
注释来调用验证器。 However, as far as I know, this annotation is not usable in my web socket handler.但是,据我所知,此注释在我的 web 套接字处理程序中不可用。 How can I invoke the SpringBoot validator programmatically without this annotation?
如何在没有此注释的情况下以编程方式调用 SpringBoot 验证器?
Besides, is it possible to use the SpringBoot de-serializer for messages instead of JSON.parseObject
?此外,是否可以对消息使用 SpringBoot 反序列化器而不是
JSON.parseObject
?
Example:例子:
import javax.validation.constraints.NotBlank;
import lombok.Data;
@Data
class CustomMessage {
@NotBlank
private String text;
}
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import lombok.NonNull;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.handler.AbstractWebSocketHandler;
@Component
@Slf4j
public class MyCustomWebSocketHandler extends AbstractWebSocketHandler {
@Override
protected void handleTextMessage(@NonNull WebSocketSession session, @NonNull TextMessage message) {
CustomMessage customMessage = JSON.parseObject(message.getPayload(), CustomMessage.class);
// Validate the message according to javax.validation annotations and throw MethodArgumentNotValidException if invalid
log.debug("Received valid message {}", customMessage)
}
}
You will use a Validator
to fill a list of ConstraintViolation
.您将使用
Validator
来填充ConstraintViolation
列表。 An example could looks like this:一个示例可能如下所示:
public abstract class GenericService<T> {
protected Validator validator;
protected void validateDomainRecord(T object, String message) {
Set<ConstraintViolation<T>> violations = validator.validate(object);
if(!violations.isEmpty()) {
throw new ConstraintViolationException(message, violations);
}
}
}
In your case, your code will looks something like this:在您的情况下,您的代码将如下所示:
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import lombok.NonNull;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.handler.AbstractWebSocketHandler;
@Component
@Slf4j
public class MyCustomWebSocketHandler extends AbstractWebSocketHandler {
private Validator validator;
@Override
protected void handleTextMessage(@NonNull WebSocketSession session, @NonNull TextMessage message) {
CustomMessage customMessage = JSON.parseObject(message.getPayload(), CustomMessage.class);
// Validate the message according to javax.validation annotations and throw MethodArgumentNotValidException if invalid
Set<ConstraintViolation<CustomMessage>> violations = validator.validate(customMessage);
if(!violations.isEmpty()) {
throw new ConstraintViolationException(message, violations);
}
log.debug("Received valid message {}", customMessage)
}
}
Take look a this good tutorial for more details.看看这个很好的教程了解更多细节。 I guess it is also possible to customize your validation and your exception too.
我想也可以自定义您的验证和异常。
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