[英]JAXB Unmarshalling @XmlAnyElement
我创建了三个JAXB类: Home , Person , Animal
。 Java类Home的变量List<Object> any
可能包含Person和/或Animal实例。
public class Home {
@XmlAnyElement(lax = true)
protected List<Object> any;
//setter getter also implemented
}
@XmlRootElement(name = "Person") // Edited
public class Person {
protected String name; //setter getter also implemented
}
@XmlRootElement(name = "Animal") // Edited
public class Animal {
protected String name; //setter getter also implemented
}
/ * 解组后 * /
Home home ;
for(Object obj : home .getAny()){
if(obj instanceof Person ){
Person person = (Person )obj;
// .........
}else if(obj instanceof Animal ){
Animal animal = (Animal )obj;
// .........
}
}
我需要实现Person or Animal
保存在对象"Home.any" List
变量,但内容"Home.any" List
是实例com.sun.org.apache.xerces.internal.dom.ElementNSImpl
而不是Animal or Person
。
因此,有一种方法可以实现将Animal or Person
实例保存在"Home.any" List
xml中。
您需要在要作为实例显示在类上的@XmlRootElement
上添加@XmlRootElement
@XmlAnyElement(lax=true)
。
家
import java.util.List;
import javax.xml.bind.annotation.*;
@XmlAccessorType(XmlAccessType.FIELD)
public class Home {
@XmlAnyElement(lax = true)
protected List<Object> any;
//setter getter also implemented
}
人
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="Person")
public class Person {
}
动物
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="Animal")
public class Animal {
}
input.xml
<?xml version="1.0" encoding="UTF-8"?>
<root>
<Person/>
<Animal/>
<Person/>
</root>
演示版
import javax.xml.bind.*;
import javax.xml.transform.stream.StreamSource;
public class Demo {
public static void main(String[] args) throws JAXBException {
JAXBContext jc = JAXBContext.newInstance(Home.class, Person.class, Animal.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
StreamSource xml = new StreamSource("src/forum20329510/input.xml");
Home home = unmarshaller.unmarshal(xml, Home.class).getValue();
for(Object object : home.any) {
System.out.println(object.getClass());
}
}
}
输出量
class forum20329510.Person
class forum20329510.Animal
class forum20329510.Person
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