当调用 JAXB.marshal 时,我正在使用 Class AdapterDataObj 将 Class DataObj 转换为 AdaptedDataObj。
package test;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
@XmlJavaTypeAdapter(AdapterDataObj.class)
public class DataObj {
public String bla = "I'm DataObj";
public String name;
public DataObj(String name) {
this.name = name;
}
}
package test;
public class AdaptedDataObj {
public String bla="I'm AdaptedDataObj";
public String name;
public AdaptedDataObj(String name) {
this.name = name;
}
}
package test;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class AdapterDataObj extends XmlAdapter {
@Override
public DataObj unmarshal(AdaptedDataObj v) throws Exception {
return null; // not needed in this case
}
@Override
public AdaptedDataObj marshal(DataObj v) throws Exception {
System.out.println("Marschal for " + v.name + " called!");
return new AdaptedDataObj(v.name);
}
}
现在我将 DataObj 放入一个新的类中,并为这个类调用 JAXB.marshal。输出看起来不错。我还收到调用 AdaptedDataObj 的消息。
package test;
import javax.xml.bind.JAXB;
public class Testobj {
public DataObj x;
public Testobj() {
x = new DataObj("Hallo World");
}
public static void main(String[] args) throws Exception {
System.out.println("Testobj");
System.out.println("=================================");
Testobj to = new Testobj();
JAXB.marshal(to, System.out);
}
}
现在我将“ public DataObj x;
”更改为“ public Object x;
”,因为我不仅想在该类中存储 DataObj。
但在这种情况下,不再调用 AdapterDataObj。DataObj 而不是 AdapterDataObj 导出为 xml。
知道问题出在哪里吗?
我还尝试将@XmlJavaTypeAdapter 添加到package-info.java 中但没有成功。AdapterDataObj 仍然没有被调用。我已经用 Java 1.7.0_45 和 1.8.0-ea 进行了测试。
package test;
import javax.xml.bind.JAXB;
import javax.xml.bind.annotation.XmlSeeAlso;
@XmlSeeAlso({DataObj.class})
public class Testobj3 {
public Object x;
public Testobj3() {
x = new DataObj("Hallo World");
}
public static void main(String[] args) throws Exception {
System.out.println("Testobj3");
System.out.println("=================================");
Testobj3 to3 = new Testobj3();
JAXB.marshal(to3, System.out);
}
}