动态XML标记和JAXB

时间:2012-05-17 14:01:24

标签: java xml jaxb

如果不需要标记complement123且XML可能具有complement4,{p>如何使用JAXB来序列化和反序列化以下XML? {1}},5

我考虑过使用n注释,但我需要知道值“First”属于第一个补码,“Second”属于第二个等等。

@XmlAnyElement

1 个答案:

答案 0 :(得分:5)

我相信您可以使用@XmlAnyElement,并且您可以访问元素名称 您需要使用“任何列表”构造 当JAXB解组XML时,您将拥有一个DOM Element对象列表,每个对象都包含元素名称和内容。
我认为您必须手动强制执行每个元素标记名称与“complementN”模式匹配。

e.g。这是从一个Oracle示例中修改的:

架构:

<xs:element name="person">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="firstname" type="xs:string"/>
      <xs:element name="lastname" type="xs:string"/>
      <xs:sequence>
          <xs:any minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
    </xs:sequence>
  </xs:complexType>
</xs:element> 

xjc的片段生成了Person类:

...
@XmlRootElement(name = "person")
public class Person {

    @XmlElement(required = true)
    protected String firstname;
    @XmlElement(required = true)
    protected String lastname;
    @XmlAnyElement(lax = true)
    protected List<Object> any;
...

测试XML文件:

<?xml version="1.0" encoding="utf-8"?>
<person>
  <firstname>David</firstname>
  <lastname>Francis</lastname>
  <anyItem1>anyItem1Value</anyItem1>
  <anyItem2>anyItem2Value</anyItem2>
</person>

测试类:

JAXBContext jc = JAXBContext.newInstance( "generated" );
Unmarshaller u = jc.createUnmarshaller();
Person contents = (Person) u.unmarshal(Testit.class.getResource("./anysample_test1.xml"));
System.out.println("contents: " + contents);
System.out.println("  firstname: " + contents.getFirstname());
System.out.println("  lastname: " + contents.getLastname());
System.out.println("  any: ");
for (Object anyItem : contents.getAny()) {
    System.out.println("    any item: " + anyItem);
    Element ele = (Element) anyItem;
    System.out.println("      ele name: " + ele.getTagName());
    System.out.println("      ele text content: " + ele.getTextContent());
}

输出:

contents: generated.Person@1bfc93a
  firstname: David
  lastname: Francis
  any: 
    any item: [anyItem1: null]
      ele name: anyItem1
      ele text content: anyItem1Value
    any item: [anyItem2: null]
      ele name: anyItem2
      ele text content: anyItem2Value