我无法访问名称空间< str name =“" footprint'>与Jaxb [英] I can't access to the namespace <str name="footprint'> with Jaxb
问题描述
全部在标题中.我是Jaxb和XML的新手. 我可以访问<之类的其他名称空间.摘要>或< id>等...但是带有<的名称空间str name =">或< int name =">,我不能. 你能帮助我吗?我有点迷路了. 我所拥有的只是空数据,我找不到路.
All is in the title. I'm new with Jaxb and the XML stuff. I can acces to others namespaces like < summary> or < id> etc... But namespaces with < str name=""> or < int name="">, i can't. Can you help me? I'm a little lost. All i have is null data, i don't find the way.
代码如下:
进食等级:
@XmlRootElement(name = "feed")
@XmlAccessorType(XmlAccessType.FIELD)
public class Feed {
@XmlElement(name = "entry")
private List<Entry> entries;
public List<Entry> getEntries() {
return this.entries;
}
}
入门班:
@XmlRootElement(name = "entry")
@XmlAccessorType(XmlAccessType.FIELD)
public class Entry {
//@XmlElement(name = "footprint")//<str name="footprint"> dont work.
//@XmlAttribute(name="footprint")//dont work
//@XmlValue//dont work
private String footprint;
@XmlElement(name = "uuid")
private String id;
@XmlElement(name = "size")
private String size;
public Entry() {}
public String getCoordinates() {
return footprint;
}
public String getId() {
return id;
}
public String getSize() {
return size;
}
public void setCoordinates(String footprint) {
this.footprint=footprint;
}
public void setSize(String size) {
this.size=size;
}
public void setId(String id) {
this.id=id;
}
}
XML:
谢谢!
推荐答案
您可以使用@XmlAttribute
注释-因为您访问的数据是属性.属性具有名称和值-您的示例是:
You can use the @XmlAttribute
annotation - since the data you are accessing are attributes. An attribute has a name and a value - your example is:
<str name="footprint">
在此示例中,属性的名称是name
,其值是"footprint"
.
In this example the attribute's name is name
and its value is "footprint"
.
因此注释必须为:
@XmlAttribute(name="name")
但是,由于XML包含多个name
属性,因此JAXB会将每个属性创建为一个单独的对象-名称-值对的列表.
However, because your XML contains multiple name
attributes, JAXB will create each one as a separate object - a list of name-value pairs.
对于XML的以下简化表示...
For the following stripped-down representation of your XML...
<feed>
<entry>
<str name="footprint">Some very long string of data in here.</str>
<str name="format">SAFE</str>
</entry>
</feed>
...我们有以下三个相关的类:
... we have the following three related classes:
提要类
@XmlRootElement(name = "feed")
@XmlAccessorType(XmlAccessType.FIELD)
public class FeedType {
@XmlElement(required = true)
protected EntryType entry;
public EntryType getEntry() {
return entry;
}
public void setEntry(EntryType value) {
this.entry = value;
}
}
Entry类:
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "entry")
public class EntryType {
@XmlElement(required = true)
protected List<StrType> str;
public List<StrType> getStr() {
if (str == null) {
str = new ArrayList<>();
}
return this.str;
}
}
Str类:
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "str")
public class StrType {
@XmlAttribute(name = "name")
private String name;
@XmlValue
private String data;
public String getName() {
return name;
}
public void setName(String value) {
this.name = value;
}
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
}
然后,解组看起来像这样:
Then, unmarshalling looks like this:
JAXBContext jc = JAXBContext.newInstance(FeedType.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("path/to/your/sample.xml");
FeedType feed = (FeedType) unmarshaller.unmarshal(xml);
这将创建一个StrType对象的列表,如下所示:
This creates a list of StrType objects, like this:
显然,这与您要在问题中创建的结构不同.但是会捕获所有数据,并根据要求使用jaxb.
This is obviously a different structure than the one you are looking to create in your question. But all the data is captured, and it uses jaxb, as requested.
可能有其他方法可以直接支持您的bean布局-例如,一种StAX方法,您可以在逐个标签扫描XML时填充每个bean.它本身具有一些明显的缺点(例如,手动装豆).
There may be alternative approaches which might support your bean layout directly - for example, a StAX approach where you populate each bean as the XML is scanned tag-by-tag. That has some obvious disadvantages of its own (manual bean population, for example).
这篇关于我无法访问名称空间< str name =“" footprint'>与Jaxb的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!