从通用的JAXB模型中,生成的xml可以采用以下形式:
<ipi-list><ipi>1001</ipi><ipi>1002</ipi></ipi-list>
因为在json中我们有数组,我们不需要两个元素,所以通过使用MOXy的oxml扩展,我可以将输出展平以给出
"ipi" : [ "1001", "1002" ],
但是因为ipi现在是指一系列事物,所以我希望将其称为ipis而不是ipi
"ipis" : [ "1001", "1002" ],
有没有办法让MOXy重命名元素?
最佳答案
您可以使用EclipseLink JAXB (MOXy)的外部映射文档来调整XML或JSON表示形式的映射。
知识产权主义者
下面是带有JAXB批注的域类,该类与您问题中的XML表示形式相匹配:
package forum11449219;
import java.util.*;
import javax.xml.bind.annotation.*;
@XmlRootElement(name="ipi-list")
public class IPIList {
private List<String> list = new ArrayList<String>();
@XmlElement(name="ipi")
public List<String> getList() {
return list;
}
public void setList(List<String> list) {
this.list = list;
}
}
oxm.xml
我们可以使用MOXy的外部映射文档来修改
list
属性如何映射到JSON。<?xml version="1.0"?>
<xml-bindings
xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"
package-name="forum11449219">
<java-types>
<java-type name="IPIList">
<java-attributes>
<xml-element java-attribute="list" name="ipis"/>
</java-attributes>
</java-type>
</java-types>
</xml-bindings>
jaxb.properties
要将MOXy指定为JAXB提供程序,您需要在与域模型相同的程序包中包含一个名为
jaxb.properties
的文件,并带有以下条目(请参阅参考资料):javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory
演示版
以下演示代码显示了在创建
JAXBContext
时如何引用外部映射文档。package forum11449219;
import java.util.*;
import javax.xml.bind.*;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
public class Demo {
public static void main(String[] args) throws Exception {
IPIList ipiList = new IPIList();
ipiList.getList().add("1001");
ipiList.getList().add("1002");
// XML
JAXBContext jc = JAXBContext.newInstance(IPIList.class);
Marshaller xmkMarshaller = jc.createMarshaller();
xmkMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
xmkMarshaller.marshal(ipiList, System.out);
// JSON
Map<String, Object> properties = new HashMap<String, Object>(3);
properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, "forum11449219/oxm.xml");
properties.put(JAXBContextProperties.MEDIA_TYPE, "application/json");
properties.put(JAXBContextProperties.JSON_INCLUDE_ROOT, false);
JAXBContext jsonJC = JAXBContext.newInstance(new Class[] {IPIList.class}, properties);
Marshaller jsonMarshaller = jsonJC.createMarshaller();
jsonMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
jsonMarshaller.marshal(ipiList, System.out);
}
}
输出量
这是运行演示代码的输出:
<?xml version="1.0" encoding="UTF-8"?>
<ipi-list>
<ipi>1001</ipi>
<ipi>1002</ipi>
</ipi-list>
{
"ipis" : [ "1001", "1002" ]
}
了解更多信息
http://blog.bdoughan.com/2010/12/extending-jaxb-representing-annotations.html
http://blog.bdoughan.com/2012/04/extending-jaxb-representing-metadata-as.html
http://blog.bdoughan.com/2011/09/mapping-objects-to-multiple-xml-schemas.html
关于java - 生成json时可以让MOXy重命名元素吗?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/11449219/