JAXB：如何将元素与命名空间绑定 [英] JAXB: How to bind element with namespace

问题描述

他是我在远程机器上托管的XML：

He is my XML hosted on remote machine:

<?xml version="1.0" encoding="UTF-8"?>
<store xmlns="http://mydomain.com/store/schemas">
    <!-- My Book store-->
    <book location="vk 1">
        <title>Learning JAXB</title>
        <author>Joe Blogg</author>
    </book>
    <book location="vk 1">
        <title>Learning JAXB SE</title>
        <author>Joe Blogg</author>
    </book>
</store>

我的绑定书如下：

Book Binding：

@XmlRootElement(name = "book")
@XmlType(propOrder = { "title", "author"})
public class Book
{
 private String title;
 private String author;
 private String location;

 @XmlElement(name = "title")
 public String getTitle()
 {
  return title;
 }

 public void setTitle(String title)
 {
  this.title=title;
 }

 @XmlAttribute(name = "location")
 public String getLocation()
 {
  return location;
 }

 public void setLocation(String location)
 {
  this.location = location;
 }

 @XmlElement(name = "author")
 public String getAuthor()
 {
  return author;
 }

 public void setAuthor(String author)
 {
  this.author = author;
 }
}

商店绑定：

@XmlRootElement(name = "store", namespace = "http://mydomain.com/store/schemas")
public class Store
{
 private List<Book> books;

  @XmlElement(name="book")
  public List<Book> getBooks()
  {
    return books;
  }

  public void setBooks(List<Book> books)
  {
    this.books= books;
  }
}

我正在解组 XML 文件为fAollows：

I am unmarshalling the XML file as fAollows:

  JAXBContext context = JAXBContext.newInstance(Store.class);
  Unmarshaller unmarshaller = context.createUnmarshaller();
  URL url = new URL("http://mydomain/files/store.xml");
  Store s= (Store) unmarshaller.unmarshal(url);
  System.out.println(s.getBooks());// Prints null

当我调用 getBooks（）时，我们得到null值。谁能发现我在这里做错了什么？！

When I call getBooks() we get null value. Can anyone spot what I am doing wrong here?!

推荐答案

由skaffman提供的答案不正确。您可以通过 @XmlSchema 在包级别指定命名空间，或者使用 @XmlType 在类级别指定命名空间并使其成为用于限定字段/属性：

The answer provided by skaffman is incorrect. You can specify the namespace at the package level via @XmlSchema or at the class level using @XmlType and have it be used to qualify the fields/properties:

更多信息

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

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

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