Java Jaxb:IllegalAnnotationExceptions

我收到以下异常“1次

IllegalAnnotationExceptions

”

代码：

Image image = new Image("url");
StringWriter sw = new StringWriter();
JAXBContext jaxbContext = JAXBContext.newInstance(Image.class);
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
jaxbMarshaller.marshal(image, sw);

类别：

@XmlRootElement(name="ProductImage")
public class Image {

    private String url;

    public Image( String url) {   
        this.url = url;
    }

    @XmlElement(name = "ImageLocation")
    public String getUrl() {
        return this.url;
    }
}

我尝试在字段上设置

@xmlement

注释，并在类上设置AccessorType字段。但我也有同样的例外

---

我缺少默认构造函数。 公众形象（）{ }使用这个类

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

@XmlRootElement(name="ProductImage")
@XmlAccessorType(XmlAccessType.PROPERTY)
@XmlType(name = "ProductImage", propOrder = {
    "url"
})
public class Image {

    public Image(){}

    private String url;

    public Image( String url) {   
        this.url = url;
    }

    @XmlElement(name = "ImageLocation")
    public String getUrl() {
        return this.url;
    }
}

生成的XML是

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ProductImage>
    <ImageLocation>url</ImageLocation>
</ProductImage>

网址

您得到的异常的堆栈跟踪是什么？