这是我的类结构:
@XmlRootElement(name="System")
public class SystemDTO () {
@XmlElement(name="ID")
public void setId(String id) {
this.id = id;
}
@XmlElement(name="Source")
public void setSource(SourceDTO source) {
this.source = source;
}
}
@XmlRootElement(name="Source")
class SourceDTO {
@XmlElement(name="Name")
public void setName(String name) {
this.name = name;
}
}
我的XML文件:
<System>
<ID>e5b160d0</ID>
<Source>
<Name>Kron</Name>
</Source>
</System>
问题是源总是空的。我没有得到异常,结果是空。我试图只使用源标记,它拾取名称很好,但是当我将其添加为System类的一部分时,它似乎不起作用。
另外,我尝试这样做,并在System中为name:
添加一个字符串成员变量。@XmlElementWrapper(name="Source")
@XmlElement(name="Name")
但是这会导致一个异常。什么好主意吗?
测试类
public class JaxbTest {
public static void main(String[] args) {
String xml = "<System>n" +
" <ID>e5b160d0</ID>n" +
" <Source>n" +
" <Name>Kron</Name>n" +
" </Source>n" +
"</System>";
SystemDTO systemDTO;
try {
JAXBContext jaxbContext = JAXBContext.newInstance(SystemDTO.class);
StringReader reader = new StringReader(xml);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
systemDTO = (SystemDTO) jaxbUnmarshaller.unmarshal(reader);
System.out.println(systemDTO.getSource().getName());
} catch (JAXBException e) {
e.printStackTrace();
}
}
}
源DTO
@XmlRootElement(name = "Source")
class SourceDTO {
private String name = null;
public String getName() {
return name;
}
@XmlElement(name = "Name")
public void setName(String name) {
this.name = name;
}
}
System DTO
@XmlRootElement(name = "System")
public class SystemDTO {
private String id;
private SourceDTO source;
public String getId() {
return id;
}
public SourceDTO getSource() {
return source;
}
@XmlElement(name = "ID")
public void setId(String id) {
this.id = id;
}
@XmlElement(name = "Source")
public void setSource(SourceDTO source) {
this.source = source;
}
}
我看到的一个可能的问题是,您在XML中声明了2个"根"元素。在源类上尝试@XmlType:
@XmlType(name="Source")
class SourceDTO {
...
}