Jaxb Unmarshalling（具有相同元素的不同包装元素）

Question

我有以下 xml 结构：

<Response>
<Field1>
    <User>
        <Name>abc</Name>
        <Id>1</Id>  
    </User>
</Field1>   
<Field2>
    <User>
        <Name>sdf</Name>
        <Id>2</Id>  
    </User>
</Field2>   
<Field3>
    <User>
        <Name>xyz</Name>
        <Id>3</Id>  
    </User>
</Field3>
...
</Response>

有不同的 Field(X) 包装元素包含相同的 User 元素。在 XML 中可以发送 n 个字段。因此，我不能为每个人提供单独的 Jaxb。在解组步骤之后，我需要访问忽略 Field 元素的用户。不幸的是，我无权更改 xml 结构。我找不到解决方案。任何指针都会有所帮助。

Answer 1

你可以对你做这样的事情Response (root) class:


@XmlRootElement(name = "Response")
@Data
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {
    @XmlElements(value = {
            @XmlElement(name = "Field1", type = Field.class),
            @XmlElement(name = "Field2", type = Field.class),
            @XmlElement(name = "Field3", type = Field.class)
    })
    private Field field;
}

JAXB 会在遇到不同的 FIelds.

时自动映射到字段 class

EDITED/UPDATED

XML:

<Response>
    <Field1>
        <Name>abc</Name>
        <Id>1</Id>
    </Field1>
    <Field2>
        <Name>sdf</Name>
        <Id>2</Id>
    </Field2>
    <Field3>
        <Name>xyz</Name>
        <Id>3</Id>
    </Field3>
</Response>

根目录：

@XmlRootElement(name = "Response")
@Data
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {
    @XmlAnyElement
    private List<Field> action;
}

字段：

@Data
@XmlAccessorType(XmlAccessType.FIELD)
public class Field {
    private String Name;
    private String Id;
}

主要：

public class Main {
    public static void main(String[] args) throws JAXBException, XMLStreamException {
        final InputStream inputStream = Main.class.getClassLoader().getResourceAsStream("sample.xml");
        final XMLStreamReader xmlStreamReader = XMLInputFactory.newInstance().createXMLStreamReader(inputStream);
        final Unmarshaller unmarshaller = JAXBContext.newInstance(Root.class).createUnmarshaller();
        final Root root = unmarshaller.unmarshal(xmlStreamReader, Root.class).getValue();
        System.out.println(root.toString());

        Marshaller marshaller = JAXBContext.newInstance(Root.class).createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
        marshaller.marshal(root, System.out);
    }
}

输出：

Root(action=[[Field1: null], [Field2: null], [Field3: null]])
<Response>
   <Field1>
      <Name>abc</Name>
      <Id>1</Id>
   </Field1>
   <Field2>
      <Name>sdf</Name>
      <Id>2</Id>
   </Field2>
   <Field3>
      <Name>xyz</Name>
      <Id>3</Id>
   </Field3>
</Response>

Jaxb Unmarshalling（具有相同元素的不同包装元素）

Jaxb Unmarshalling (different wrapper elements with same element)

jaxb

unmarshalling