将JAXB注释与值一起使用

Question

When generating XML using JAXB annotations, I know it's not possible to use @XmlElement(name="City") & @XmlValue on the same Java member because they are mutually exclusive. Is it possible to @XmlElement to produce an XML tag with a value at the same time? Not being able to do this causes a ton of objects to be created and seems to be overkill.

Java Code

....
@XmlElement(name="City")
@XmlValue       <---- I'm wanting to do this but I'm limited by the API
private String city;

Expected Output

....
<City>some value here</City>
....

Answer 1

We can try to achieve the same using another type which uses @XmlValue annotation.

Below is what you can try -

@XmlRootElement(name="CityRoot")
@XmlType(name="CityRootType")
public class CityRoot {
    @XmlElement(name="City")
    public CityName s;
}

CityName definition as below

public class CityName {
    @XmlValue
    String name;
}

Now, feed these two files to schemagen to have the .xsd file generated and using that generate .xml file to verify.

Below is how generated xml file looks like when I generated it -

<?xml version="1.0" encoding="UTF-8"?>
<CityRoot>
      <City>SomeCityName</City>
</CityRoot>

Answer 2

If you want to have an element with simple text, the only annotation you need is the @XmlElement annotation. If the type of a field is String, JAXB generates an xml element with the value of the String as the value of the element.

The only thing you need is this:

@XmlElement(name="City")
private String city;