Jackson XML - deserializing XML with namespace prefixes

问题

I'm working with the Jackson XML plugin (https://github.com/FasterXML/jackson-dataformat-xml), and I'm not sure if it's supported, but I'm wondering if it's possible to both serialize and deserialize XML with namespace prefixes, like so:

<name:Foo>
  <name:Bar>
    <name:x>x</name:x>
    <name:y>y</name:y>
  </name:Bar>
</name:Foo>

I can generate this type of XML using Jackson's plugin like so:

@JacksonXmlProperty(localName="name:Bar")
public Bar getBar() {
    return bar;
}

However, I can't find a way to configure my POJOs to deserialize from the XML generated. Please see the following example code:

public class Bar{
    @JacksonXmlProperty(localName="name:x")
    public String x = "x";
    @JacksonXmlProperty(localName="name:y")
    public String y = "y";
}

@JacksonXmlRootElement(localName="name:Foo")
    public class Foo{
        private Bar bar;

        @JacksonXmlProperty(localName="name:Bar")
        public Bar getBar() {
           return bar;
        }

        public void setBar(Bar bar) {
            this.bar = bar;
        }   
}

public class TestDeserialization {

    public static void main(String[] args) throws Exception {
        Foo foo = new Foo();
        foo.setBar(new Bar());

        XmlMapper xmlMapper = new XmlMapper();
        String xml = xmlMapper.writerWithDefaultPrettyPrinter().writeValueAsString(foo);
        System.out.println(xml);
        System.out.println("XML Desearialzing....");
        Foo foo2= xmlMapper.readValue(xml, Foo.class);
        System.out.println(xmlMapper.writeValueAsString(foo2));
     }
}

Trying to run this test gives me an exception:

Exception in thread "main" java.io.IOException: com.ctc.wstx.exc.WstxParsingException: Undeclared namespace prefix "name"

which is understandable, but I was wondering if there's a way to get this to work with Jackson XML?

回答1:

JacksonXmlProperty annotation has property namespace. Use it for defining namespace

public class Bar {
    @JacksonXmlProperty(namespace = "name",localName="x")
    public String x = "x";
    @JacksonXmlProperty(namespace = "name",localName="y")
    public String y = "y";
} 

@JacksonXmlRootElement(namespace = "name", localName = "Foo")
public class Foo {
   private Bar bar;

   @JacksonXmlProperty(namespace = "name", localName = "Bar")
   public Bar getBar() {
      return bar;
   }

   public void setBar(Bar bar) {
      this.bar = bar;
   }
}

来源：https://stackoverflow.com/questions/16442805/jackson-xml-deserializing-xml-with-namespace-prefixes

标签

java

xml

jackson