如何修复 Jaxb 的 xmlMapper "Multiple fields representing property "PS"" 问题？

Question

我使用 Jaxb 从 xsd:

生成了一个 Jar 文件

CustomObject inputRequest = xmlMapper.readValue(input, CustomObject.class);

我收到的错误消息是：

com.fasterxml.jackson.databind.JsonMappingException: Multiple fields representing property "PS": OrderLineType#pS vs OrderLineType#pSV5 at [Source: (StringReader); line: 1, column: 1]

而我的 class 是：

@XmlElement(name = "PS", namespace = "financetypes:defn:v4")
protected financetypes.v4.PSType pS;
@XmlElement(name = "PS", namespace = "financetypes:defn:v5")
protected financetypes.v5.PSType pSV5;

它们具有相同的名称，但命名空间不同。

xmlmapper 是否可以处理同名不同命名空间的 XmlElement？

如果是，我该如何解决？如果没有，我该怎么办？

我正在从 jenkin 构建 jar 文件。有没有我可以用来解决这个问题的插件？

谢谢！

这是我的 xsd v4.xsd

    <!--Begin Definition: Complex Type: PriceStructureType-->
<xs:complexType name="PriceStructureType">
    <xs:sequence>
        <xs:element name="PriceModel" type="xs:string" minOccurs="0">
            <xs:annotation>
                <xs:documentation>
                    Will be required in future...
                    TODO: Add valid items...
                </xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element ref="finance:SourceSystemPrice" minOccurs="0">
            <xs:annotation>
                <xs:documentation>
                    Will be required in future...
                </xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="ComponentPrice" type="finance:ComponentListType" minOccurs="0">
            <xs:annotation>
                <xs:documentation>
                    Will be required in future...
                </xs:documentation>
            </xs:annotation>
        </xs:element>
    </xs:sequence>
</xs:complexType>
<xs:element name="PriceStructure" type="finance:PriceStructureType"/>
<!--End Definition: Complex Type: PriceStructureType-->

v5.xsd

    <!--Begin Definition: Complex Type: PriceStructureType-->
<xs:complexType name="PriceStructureType">
    <xs:sequence>
        <xs:element name="PriceModel" type="xs:string" minOccurs="0">
            <xs:annotation>
                <xs:documentation>
                    Will be required in future...
                    TODO: Add valid items...
                </xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element ref="finance:SourceSystemPrice" minOccurs="0">
            <xs:annotation>
                <xs:documentation>
                    Will be required in future...
                </xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="ComponentPrice" type="finance:ComponentListType" minOccurs="0">
            <xs:annotation>
                <xs:documentation>
                    Will be required in future...
                </xs:documentation>
            </xs:annotation>
        </xs:element>
    </xs:sequence>
</xs:complexType>
<xs:element name="PriceStructure" type="finance:PriceStructureType"/>
<!--End Definition: Complex Type: PriceStructureType-->

common.xsd

xmlns:finance="urn:financetypes:defn:v4"
xmlns:finance_v5="urn:financetypes:defn:v5"
<xs:import namespace="urn:financetypes:defn:v4" schemaLocation="financetypes.v4.xsd"/>
<xs:import namespace="urn:financetypes:defn:v5" schemaLocation="financetypes.v5.xsd"/>

<xs:choice>
            <xs:element ref="finance:PriceStructure" minOccurs="0">
                <xs:annotation>
                    <xs:documentation xml:lang="en">
                        Price Structure itemizes the price components of this OrderLine.  Pricing
                        is a integral part of the Sales Order record.
                        This should be a required element for a sales order, but it is marked
                        as optional for backward compatibility. 
                    </xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element ref="finance_v5:PriceStructure" minOccurs="0">
                <xs:annotation>
                    <xs:documentation xml:lang="en">
                        Price Structure itemizes the price components of this OrderLine.  Pricing
                        is a integral part of the Sales Order record.
                        This should be a required element for a sales order, but it is marked
                        as optional for backward compatibility. 
                    </xs:documentation>
                    <xs:appinfo>
                        <jaxb:property name="PriceStructureV5"/>
                    </xs:appinfo>
                </xs:annotation>
            </xs:element>
        </xs:choice>

Answer 1

你可以做到这一点。对于包含这两个元素的根 class：

@XmlRootElement(name = "root")
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {

    @XmlElement(name = "PS", namespace = "financetypes:defn:v4")
    protected financetypes.v4.PSType pS;
    @XmlElement(name = "PS", namespace = "financetypes:defn:v5")
    protected financetypes.v5.PSType pSV5;
}

您可以像这样创建具有不同版本的 classes：

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "v4PS", namespace = "financetypes:defn:v4")
public class PSType {

    @XmlValue
    private String value;
}

和：

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "v5PS", namespace = "financetypes:defn:v5")
public class PSType {

    @XmlValue
    private String value;
}

示例xml如下：

<root xmlns:v4="financetypes:defn:v4" xmlns:v5="financetypes:defn:v5">
    <v4:PS>version 4</v4:PS>
    <v5:PS>version 5</v5:PS>
</root>

您将能够正确解组。

更新回复评论：

您使用 xsd 生成 classes。你没有提供 xsd 所以我假设你不被允许。我创建了一个 xsd 来生成您在问题中显示的 classes。 namespace.xsd 看起来像这样：

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:v4="financetypes:defn:v4" xmlns:v5="financetypes:defn:v5">

    <xs:element name="root">
        <xs:complexType>
            <xs:all>
                <xs:element name="v4PSType" type="PSTypev4" />
                <xs:element name="v5PSType" type="PSTypev5" />
            </xs:all>
        </xs:complexType>
    </xs:element>

    <xs:complexType name="PSTypev4">
        <xs:simpleContent>
            <xs:extension base="xs:string" />
        </xs:simpleContent>
    </xs:complexType>

    <xs:complexType name="PSTypev5">
            <xs:simpleContent>
                <xs:extension base="xs:string" />
            </xs:simpleContent>
    </xs:complexType>

</xs:schema>

那么您的绑定将是：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<jaxb:bindings version="2.0" xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"
               xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
               xmlns:xs="http://www.w3.org/2001/XMLSchema"
               xmlns:annox="http://annox.dev.java.net"
               jaxb:extensionBindingPrefixes="xjc">

    <jaxb:bindings schemaLocation="../xsd/namespaces.xsd">
        <jaxb:bindings node="//xs:complexType[@name='PSTypev4']">
            <annox:annotate target = "class">
                <annox:annotate annox:class="javax.xml.bind.annotation.XmlType" name="v4PSType" namespace="financetypes:defn:v4" />
            </annox:annotate>
        </jaxb:bindings>

        <jaxb:bindings node="//xs:complexType[@name='PSTypev5']">
            <annox:annotate target = "class">
                <annox:annotate annox:class="javax.xml.bind.annotation.XmlType" name="v5PSType" namespace="financetypes:defn:v5" />
            </annox:annotate>
        </jaxb:bindings>

        <jaxb:bindings node="//xs:element[@name='root']//xs:complexType//xs:all//xs:element[@name='v5PSType']">
            <annox:annotate target = "field">
                <annox:annotate annox:class="javax.xml.bind.annotation.XmlElement" name="PS" namespace="financetypes:defn:v5" />
            </annox:annotate>
        </jaxb:bindings>

        <jaxb:bindings node="//xs:element[@name='root']//xs:complexType//xs:all//xs:element[@name='v4PSType']">
            <annox:annotate target = "field">
                <annox:annotate annox:class="javax.xml.bind.annotation.XmlElement" name="PS" namespace="financetypes:defn:v4" />
            </annox:annotate>
        </jaxb:bindings>
    </jaxb:bindings>
</jaxb:bindings>

然后你会得到 classes 作为我的答案。

如何修复 Jaxb 的 xmlMapper "Multiple fields representing property "PS"" 问题？

How to fix xmlMapper "Multiple fields representing property "PS"" issue with Jaxb?

java

xml

jaxb

jackson

xmlmapper