MOXy JAXB javax.xml.bind.PropertyException

Question

现在我有了这堂课：

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;

import org.eclipse.persistence.jaxb.MarshallerProperties;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(Foo.class);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        unmarshaller.setProperty("eclipselink.media-type", "application/json");
        unmarshaller.setProperty("eclipselink.json.include-root", false);
        StreamSource source = new StreamSource("http://test.url/path/to/resource");
        JAXBElement<Foo> jaxbElement = unmarshaller.unmarshal(source, Foo.class);

        System.out.println(jaxbElement.getValue().getFoo());

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.setProperty(MarshallerProperties.MEDIA_TYPE, "application/json");
        marshaller.setProperty("eclipselink.json.include-root", false);
        marshaller.marshal(jaxbElement, System.out);
    }
}

并且我有jaxb.properties:

javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory

如果运行此代码，将得到：

Exception in thread "main" javax.xml.bind.PropertyException: name: eclipselink.media-type value: application/json
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.setProperty(AbstractUnmarshallerImpl.java:352)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.setProperty(UnmarshallerImpl.java:450)
    at com.example.JavaSEClient.main(JavaSEClient.java:19)

我该怎么解决这个？

我搜索了SO和Google，这些答案都不起作用：

使用Eclipselink.media-type值设置封送器属性时的PropertyException：Application/JSON JAXB javax.xml.bind.PropertyException

Answer 1

您需要确保jaxb.properties文件与用于引导jaxbcontext的域类在同一个包中，并且EclipseLink MOXy位于类路径上。

• http://blog.bdoughan.com/search/label/jaxb.properties

如果您使用的是Maven，那么jaxb.properties文件应该位于以下位置，假设foo位于名为com.example.foo的包中：

• src/main/resources/com/example/foo/jaxb.properties
• src/main/java/com/example/foo/foo.class

有关完整示例,请参阅：

• https://github.com/bdoughan/blog20110819