JAXB：是否可以将XmlAttribute的参数“ required = true”设置为默认值？

Question

I have

@XmlAttribute(required=true)

in hundreds places in a projects.

Can I make this default? ...

...So that I then only need to specify

@XmlAttribute(required=false)

when needed.

Answer 1

No, that behaviour is hard-wired. However, the required attribute is really a lightweight alternative to a proper XML schema. If you need better control over document validation, then I suggest you define an XML Schema for your documents, and inject the schema into the JAXBContext . The documents will then be checked on marshalling and unmarshalling, and you won't have to rely on the annotations for validation.