JAXB - unmarshalled字段为null [英] JAXB - unmarshalled fields are null

问题描述

我们正在解析 http://xmlgw.companieshouse.gov.uk/ 的回复。这是发送给马歇尔的文本：

We are unmarshalling a response from http://xmlgw.companieshouse.gov.uk/. This is the text sent to the marshall:

<NameSearch xmlns="http://xmlgw.companieshouse.gov.uk/v1-0/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlgw.companieshouse.gov.uk/v1-0/schema http://xmlgw.companieshouse.gov.uk/v1-0/schema/NameSearch.xsd">
  <ContinuationKey>...</ContinuationKey>
  <RegressionKey>...</RegressionKey>
  <SearchRows>20</SearchRows>
  <CoSearchItem>
    <CompanyName>COMPANY NAME</CompanyName>
    <CompanyNumber>23546457</CompanyNumber>
    <DataSet>LIVE</DataSet>
    <CompanyIndexStatus>DISSOLVED</CompanyIndexStatus>
    <CompanyDate></CompanyDate>
  </CoSearchItem>
  // more CoSearchItem elements
</NameSearch>

CoSearchItem的模型如下：

The model of CoSearchItem is like this:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "CoSearchItem", propOrder = {
    "companyName",
    "companyNumber",
    "dataSet",
    "companyIndexStatus",
    "companyDate",
    "searchMatch"
})
public class CoSearchItem {

    @XmlElement(name = "CompanyName", required = true)
    protected String companyName;
    @XmlElement(name = "CompanyNumber", required = true)
    protected String companyNumber;
    @XmlElement(name = "DataSet", required = true)
    protected String dataSet;
    @XmlElement(name = "CompanyIndexStatus")
    protected String companyIndexStatus;
    @XmlElement(name = "CompanyDate")
    @XmlSchemaType(name = "date")
    protected XMLGregorianCalendar companyDate;
    @XmlElement(name = "SearchMatch")
    protected String searchMatch;

    // getters and setters

}

NameSearch模型具有以下结构：

NameSearch model has this structure:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "NameSearch", namespace = "http://xmlgw.companieshouse.gov.uk/v1-0/schema", propOrder = {
    "continuationKey",
    "regressionKey",
    "searchRows",
    "coSearchItem"
})
@XmlRootElement(name = "NameSearch", namespace = "http://xmlgw.companieshouse.gov.uk/v1-0/schema")
public class NameSearch {

    @XmlElement(name = "ContinuationKey", required = true)
    protected String continuationKey;
    @XmlElement(name = "RegressionKey", required = true)
    protected String regressionKey;
    @XmlElement(name = "SearchRows", required = true)
    protected BigInteger searchRows;
    @XmlElement(name = "CoSearchItem")
    protected List<CoSearchItem> coSearchItem;

    // setters and getters

}

包有这样的注释：

@XmlSchema(namespace = "http://xmlgw.companieshouse.gov.uk/v1-0", elementFormDefault = XmlNsForm.QUALIFIED, //
    xmlns = {
        @XmlNs(prefix = "xsi", namespaceURI = "http://www.w3.org/2001/XMLSchema-instance") 
     }
)

package uk.gov.companieshouse;

解编是从第一个节点完成的从任何项目列表中的较大文档中提取。当我们解析xml但是CoSearchItem中的所有字段都设置为null并且无法找出原因。

The unmarshaling is done from the first Node extracted from a larger Document, inside an any list of items. When we parse the xml however all the fields in CoSearchItem are set to null and can't figure out the reason.

推荐答案

你需要使用包级别 @XmlSchema 注释来指定模型的命名空间限定。

You need to use a package level @XmlSchema annotation to specify the namespace qualification for your model.

@XmlSchema(
    namespace = "http://xmlgw.companieshouse.gov.uk/v1-0/schema",
    elementFormDefault = XmlNsForm.QUALIFIED)
package example;

import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

这个指定您不需要在 @上指定名称空间URI您的 NameSearch 类中的XmlRootElement 和 @XmlType 。

This this specified you do not require to specify the namespace URI on the @XmlRootElement and @XmlType on your NameSearch class.

更多信息

• http://blog.bdoughan.com/2010/08/jaxb-namespaces.html

• http://blog.bdoughan.com/2010/08/jaxb-namespaces.html

解组是从第一个从较大的
文档中提取的节点完成的。项目列表。

The unmarshaling is done from the first Node extracted from a larger Document, inside an any list of items.

确保用于创建节点的DOM parer是名称空间感知的。

Make sure the DOM parer used to create the nodes is namespace aware.

documentBuilderFactory.setNamespaceAware(true);

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