java 使用 POJO 和 JAXB 注释绑定 XML
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Binding XML using POJO and JAXB annotations
提问by Alex Dowining
I have the following xml format that i want to bind it through a POJO and using JAXB annotations. The XML format is the following:
我有以下 xml 格式，我想通过 POJO 并使用 JAXB 注释将其绑定。XML 格式如下：
<datas>
<data>apple<data>
<data>banana<data>
<data>orange<data>
<datas>
And i'm trying to bind the data through the following POJO:
我正在尝试通过以下 POJO 绑定数据：
@XmlRootElement()
@XmlAccessorType(XmlAccessType.FIELD)
public class Datas {
@XmlElement
private List<String> data;
//get/set methods
}
And also i try and this POJO:
我也尝试使用这个 POJO：
@XmlRootElement()
@XmlAccessorType(XmlAccessType.FIELD)
public class Datas {
@XmlElement
private List<Data> datas;
//get/set methods
}
//
//
@XmlRootElement()
@XmlAccessorType(XmlAccessType.FIELD)
public class Data{
@XmlElement
private String data;
//get/set methods
}
In the first case it retrieves only the first data: apple. In the second case doesn't retrieve anything. Could someone help me to provide the appropriate POJO and annotations in order to bind all data?
在第一种情况下，它只检索第一个数据：apple。在第二种情况下不检索任何东西。有人可以帮助我提供适当的 POJO 和注释以绑定所有数据吗？
回答by bdoughan
You can do one of the following options:
您可以执行以下选项之一：
OPTION #1
选项1
Datas
数据
package forum11311374;
import java.util.List;
import javax.xml.bind.annotation.*;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Datas {
private List<String> data;
//get/set methods
}
For More Information
想要查询更多的信息
OPTION #2
选项#2
Datas
数据
package forum11311374;
import java.util.List;
import javax.xml.bind.annotation.*;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Datas {
@XmlElement(name="data")
private List<Data> datas;
//get/set methods
}
Data
数据
package forum11311374;
import javax.xml.bind.annotation.*;
@XmlAccessorType(XmlAccessType.FIELD)
public class Data{
@XmlValue
private String data;
//get/set methods
}
For More Information
想要查询更多的信息
The following can be used with both options:
以下内容可与两个选项一起使用：
input.xml/Ouput
输入.xml/输出
I have updated the XML document to contain the necessary closing tags. <data>apple</data>instead of <data>apple<data>.
我已更新 XML 文档以包含必要的结束标记。 <data>apple</data>而不是<data>apple<data>.
<datas>
<data>apple</data>
<data>banana</data>
<data>orange</data>
</datas>
Demo
演示
package forum11311374;
import java.io.File;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Datas.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("src/forum11311374/input.xml");
Datas datas = (Datas) unmarshaller.unmarshal(xml);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(datas, System.out);
}
}
回答by josseyj
The first option did work for me... not sure why you are getting the problem... Try this annotation...
第一个选项对我有用......不知道为什么你会遇到这个问题......试试这个注释......
@XmlElements(@XmlElement(name="data", type=String.class))
private List<String> datas; //ignore the variable name
