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我有以下几点:的SimpleXML的xs:choice元素
<xs:complexType name="AnswerType">
<xs:choice minOccurs="1" maxOccurs="1">
<xs:element name="Checklist" type="ChecklistType" />
<xs:element name="OptionList" type="OptionListType" />
<xs:element name="Measurement" type="MeasureType" />
</xs:choice>
</xs:complexType>
如何我注释使用SimpleXML选择XSD元素?目前我必须将它们全部设置为required = false
@Element(name = "Checklist", required=false)
protected ChecklistType checklist;
@Element(name = "OptionList", required=false)
protected OptionListType optionList;
@Element(name = "Measurement", required=false)
protected MeasureType measurement;
当然有更好的方法。一个必须要求=真,但是如何?