javax.xml.bind.UnmarshaleException:意外元素；

将XML响应从服务转换为POJO时出现异常。XML如下所示：

 Document response = getResponse(url);
 JAXBContext context = JAXBContext.newInstance(AmazonItem.class);
 Unmarshaller unMarshaller = context.createUnmarshaller();
 newItem = (AmazonItem) unMarshaller.unmarshal(response);

<ItemSearchResponse>

这是我的名片

下面是我的文件的详细信息

package info.java

@XmlSchema(
        namespace = "http://webservices.amazon.com/AWSECommerceService/2011-08-01",
        elementFormDefault = XmlNsForm.QUALIFIED)

package com.services.amazon;


import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

@XmlRootElement(name="ItemSearchResponse")
@XmlAccessorType(XmlAccessType.FIELD)
public class AmazonItem
{
    @XmlElement(name="Items")
    private Items items = null;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Items { 
    @XmlElement(name="Item")
    List<Item> items = new ArrayList();
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Item {
    @XmlElement(name="ASIN")
    private String asin;

    @XmlElement(name="ItemAttributes")
    private ItemAttributes attributes;

    @XmlElement(name="ItemLinks")
    private List<ItemLinks> itemLinks;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemAttributes {
    @XmlElement(name="Title")
    private String title;

    @XmlElement(name="Actor")
    private List<String> actor;

    @XmlElement(name="ProductGroup")
    private String productGroup;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLink {
    @XmlElement(name="Description")
    private String description;

    @XmlElement(name="URL")
    private String url;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLinks {
    @XmlElement(name="ItemLink")
    List<ItemLink> itemLinks;
}

amazonim.java

@XmlSchema(
        namespace = "http://webservices.amazon.com/AWSECommerceService/2011-08-01",
        elementFormDefault = XmlNsForm.QUALIFIED)

package com.services.amazon;


import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

@XmlRootElement(name="ItemSearchResponse")
@XmlAccessorType(XmlAccessType.FIELD)
public class AmazonItem
{
    @XmlElement(name="Items")
    private Items items = null;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Items { 
    @XmlElement(name="Item")
    List<Item> items = new ArrayList();
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Item {
    @XmlElement(name="ASIN")
    private String asin;

    @XmlElement(name="ItemAttributes")
    private ItemAttributes attributes;

    @XmlElement(name="ItemLinks")
    private List<ItemLinks> itemLinks;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemAttributes {
    @XmlElement(name="Title")
    private String title;

    @XmlElement(name="Actor")
    private List<String> actor;

    @XmlElement(name="ProductGroup")
    private String productGroup;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLink {
    @XmlElement(name="Description")
    private String description;

    @XmlElement(name="URL")
    private String url;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLinks {
    @XmlElement(name="ItemLink")
    List<ItemLink> itemLinks;
}

Items.java

@XmlSchema(
        namespace = "http://webservices.amazon.com/AWSECommerceService/2011-08-01",
        elementFormDefault = XmlNsForm.QUALIFIED)

package com.services.amazon;


import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

@XmlRootElement(name="ItemSearchResponse")
@XmlAccessorType(XmlAccessType.FIELD)
public class AmazonItem
{
    @XmlElement(name="Items")
    private Items items = null;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Items { 
    @XmlElement(name="Item")
    List<Item> items = new ArrayList();
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Item {
    @XmlElement(name="ASIN")
    private String asin;

    @XmlElement(name="ItemAttributes")
    private ItemAttributes attributes;

    @XmlElement(name="ItemLinks")
    private List<ItemLinks> itemLinks;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemAttributes {
    @XmlElement(name="Title")
    private String title;

    @XmlElement(name="Actor")
    private List<String> actor;

    @XmlElement(name="ProductGroup")
    private String productGroup;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLink {
    @XmlElement(name="Description")
    private String description;

    @XmlElement(name="URL")
    private String url;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLinks {
    @XmlElement(name="ItemLink")
    List<ItemLink> itemLinks;
}

ItemLinks.java

@XmlSchema(
        namespace = "http://webservices.amazon.com/AWSECommerceService/2011-08-01",
        elementFormDefault = XmlNsForm.QUALIFIED)

package com.services.amazon;


import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

@XmlRootElement(name="ItemSearchResponse")
@XmlAccessorType(XmlAccessType.FIELD)
public class AmazonItem
{
    @XmlElement(name="Items")
    private Items items = null;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Items { 
    @XmlElement(name="Item")
    List<Item> items = new ArrayList();
}

@XmlAccessorType(XmlAccessType.FIELD)
public class Item {
    @XmlElement(name="ASIN")
    private String asin;

    @XmlElement(name="ItemAttributes")
    private ItemAttributes attributes;

    @XmlElement(name="ItemLinks")
    private List<ItemLinks> itemLinks;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemAttributes {
    @XmlElement(name="Title")
    private String title;

    @XmlElement(name="Actor")
    private List<String> actor;

    @XmlElement(name="ProductGroup")
    private String productGroup;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLink {
    @XmlElement(name="Description")
    private String description;

    @XmlElement(name="URL")
    private String url;
}

@XmlAccessorType(XmlAccessType.FIELD)
public class ItemLinks {
    @XmlElement(name="ItemLink")
    List<ItemLink> itemLinks;
}

@xmlacessortype（xmlacesstype.FIELD）
公共类项目链接{
@xmlement（name=“ItemLink”）
列出项目链接；
}

错误消息表示您得到的XML文档如下所示：

 Document response = getResponse(url);
 JAXBContext context = JAXBContext.newInstance(AmazonItem.class);
 Unmarshaller unMarshaller = context.createUnmarshaller();
 newItem = (AmazonItem) unMarshaller.unmarshal(response);

<ItemSearchResponse>

而不是与已映射的名称空间限定匹配的以下名称空间限定：

<ItemSearchResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2011-08-01">

解释如下： JAXBContext实例初始化时使用作为参数传递的类以及可以从这些类静态访问的类

使用package初始化

JAXBContext

，这样它就可以看到package-info.java中声明的

@XmlSchema

：

JAXBContext.newInstance("com.services.amazon")

---

如果在getResponse方法中使用DocumentBuilderFactory，请尝试设置命名空间感知：

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);

---

我遇到了同样的UnmarshalException，这就解决了它。

从

package info.java

中删除名称空间并进行更改

elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED 

到

---

从package-info.java中删除名称空间 这是我的工作

例：

@javax.xml.bind.annotation.XmlSchema（namespace=”“，elementFormDefault=javax.xml.bind.annotation.XmlNsForm.QUALIFIED）

---

嗯，但是我的xml确实有一个名称空间限定条件……正如我所发布的。但是你是对的，如果我从

package info.java

中删除名称空间，那么它工作得很好。@Ethan-代码中的

url

参数是否真的设置为或其他值？不需要在包名上引导

JAXBContext

，就可以获得e

@XmlSchema

注释。当前，根据错误消息，JAXB需要名称空间，似乎是XML缺少名称空间。可以，那么作者应该检查输入，他提供的输入确实有名称空间