java - 从没有模式的 xml 创建 Jaxb 类

Question

如何创建一个简单的 jaxb Java 类来表示以下 xml

<rootelem>
  <myelem name="abc" myatt="true"/>

  <myelem name="def">
     <Key value="newvalue"/>
  </myelem>
  <myelem name="xyz">
     <Key value="42"/>
  </myelem>
</rootelem>

可以有多个myelem，每个myelem可以包含多个key

我不想使用 xsd

Answer 1

这是一个基本的例子:

import java.io.FileReader;
import java.util.List;

import javax.xml.bind.JAXB;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name="rootelem")
class RootElem {
    List<MyElem> myelem;
}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name="myelem")
class MyElem {
    @XmlAttribute
    String name;
    @XmlAttribute
    Boolean myatt;
    @XmlElement(name="Key")
    List<Key> keys;
}

@XmlAccessorType(XmlAccessType.FIELD)
class Key {
    @XmlAttribute
    String value;
}

public class Test1 {

    public static void main(String[] args) throws Exception {
        RootElem r = JAXB.unmarshal(new FileReader("test.xml"), RootElem.class);
        System.out.println(r);
        JAXB.marshal(r, System.out);
    }
}