java JAXB 是否总是忽略@XmlType/propOrder 中未指定的“额外”元素？
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Does JAXB always ignore 'extra' elements not specified in @XmlType/propOrder?
提问by Derek
If I have a class annotated with
如果我有一个类注释
@XmlType(name = "someDTO", propOrder = {
"firstField",
"secondField",
})
@XmlType(name = "someDTO", propOrder = {
"firstField",
"secondField",
})
but the XML (from a SOAP response, say) looks like
但是 XML（来自 SOAP 响应，比如说）看起来像
<return><firstField>a</firstField><secondField>b</secondField><thirdField>c</thirdField></return>
<return><firstField>a</firstField><secondField>b</secondField><thirdField>c</thirdField></return>
My object will still get firstField and secondField populated, and thirdField is ignored.
我的对象仍然会填充 firstField 和 secondField，而thirdField 被忽略。
Why is this? Will this always be the case? Is there a way to prevent object creation if extra fields are present?
为什么是这样？会一直这样吗？如果存在额外的字段，有没有办法阻止对象创建？
回答by bdoughan
Some JAXB (JSR-222)implementations will complain if there are properties mapped to XML elements that are not included in the propOrder. propOderon @XmlTypeis not used to control which elements are included/excluded.
一些JAXB（JSR-222） ，如果有未包含在映射到XML元素的属性的实现会抱怨propOrder。 propOderon@XmlType不用于控制包含/排除哪些元素。
Options for Excluding Properties
排除属性的选项
- If you want to exclude less than half of the properties then I would suggest marking the ones you wish to exclude with
@XmlTransient. - If you wish to exclude more than half of the properties then I would suggest using
@XmlAccessorType(XmlAccessType.NONE)and annotating the properties you wish to include.
- 如果您想排除少于一半的属性，那么我建议您用 标记您希望排除的属性
@XmlTransient。 - 如果您希望排除一半以上的属性，那么我建议您使用
@XmlAccessorType(XmlAccessType.NONE)并注释您希望包含的属性。
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