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我正在使用 java SDK 中的 xjc 从以下 xsd 文件创建我的 JAXB 类：

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="customer" type="customer"/>

    <xs:complexType name="customer">
        <xs:sequence>
            <xs:element name="customerinfo" type="information"/>
        </xs:sequence>
    </xs:complexType>

    <xs:complexType name="information">
            <xs:choice minOccurs="1" maxOccurs="1">
                <xs:element name="infos" type="informations"/>
                <xs:element name="addressline" type="address"/>
                <xs:element name="string" type="xs:string"/>
            </xs:choice>
    </xs:complexType>

    <xs:complexType name="informations">
            <xs:choice minOccurs="1" maxOccurs="unbounded">
                <xs:element name="infos" type="informations"/>
                <xs:element name="addressline" type="address"/>
                <xs:element name="string" type="xs:string"/>
            </xs:choice>
    </xs:complexType>

    <xs:complexType name="address"/>

</xs:schema>

如您所见，它使用“infos”元素进行了一些递归。当我用 xjc 创建我的类并创建这些类的实例时，如下所示：

ObjectFactory objFact = new ObjectFactory();
    Customer customer = objFact.createCustomer();

    Information infoRoot = objFact.createInformation();
    Information infoInside = objFact.createInformation();
    Information infoInside2 = objFact.createInformation();
    Informations infos = objFact.createInformations();
    Address addressInside = objFact.createAddress();
    infos.getInfosOrAddresslineOrString().add(infoInside);
    infos.getInfosOrAddresslineOrString().add(addressInside);
    infos.getInfosOrAddresslineOrString().add("bla");
    Informations infosInside = objFact.createInformations();
    infosInside.getInfosOrAddresslineOrString().add(infoInside2);
    infoInside.setInfos(infosInside);
    infoRoot.setInfos(infos);

    customer.setCustomerinfo(infoRoot);

    JAXBElement<Customer> jaxbCustomer = objFact.createCustomer(customer);

    JAXBContext jc = JAXBContext.newInstance(Customer.class);
    Marshaller marshaller = jc.createMarshaller();
    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
    marshaller.marshal(jaxbCustomer, System.out);

输出不像我期望的那样：

<customer>
<customerinfo>
    <infos>
        <addressline xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="information">
            <infos>
                <addressline xsi:type="information"/>
            </infos>
        </addressline>
        <addressline/>
        <string>bla</string>
    </infos>
</customerinfo>
</customer>

如您所见，infos 对象周围有一个额外的元素，该元素从未在代码中实例化。为什么将此元素添加到编组的 xml 中？

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