使用POJO和JAXB注释绑定XML [英] Binding XML using POJO and JAXB annotations

问题描述

我有以下xml格式，我想通过POJO绑定它并使用JAXB注释。 XML格式如下：

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:

 <datas>
   <data>apple<data>
   <data>banana<data>
   <data>orange<data>
 <datas>

我正在尝试通过以下POJO绑定数据：

And i'm trying to bind the data through the following POJO:

@XmlRootElement()
@XmlAccessorType(XmlAccessType.FIELD)
public class Datas {

  @XmlElement
  private List<String> data;

  //get/set methods

}

我也尝试这个POJO：

And also i try and this 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

}

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。有人可以帮我提供适当的POJO和注释以绑定所有数据吗？

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?

推荐答案

您可以执行以下操作之一选项：

You can do one of the following options:

选项＃1

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

}

更多信息

• http://blog.bdoughan.com/2010/09/jaxb-collection-properties.html

• http://blog.bdoughan.com/2010/09/jaxb-collection-properties.html

选项＃2

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

}

数据

package forum11311374;

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class Data{

  @XmlValue
  private String data;

  //get/set methods

}

更多信息

• http://blog.bdoughan.com/2011/06/jaxb-and-complex-types-with-simple.html

• http://blog.bdoughan.com/2011/06/jaxb-and-complex-types-with-simple.html

以下两个选项均可使用以下内容：

The following can be used with both options:

input.xml /输出

我已更新XML文档以包含必要的内容关闭标签。 < data> apple< / data> 而不是< data> apple< data> 。

I have updated the XML document to contain the necessary closing tags. <data>apple</data> instead of <data>apple<data>.

<datas>
   <data>apple</data>
   <data>banana</data>
   <data>orange</data>
 </datas>

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);
    }

}

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