I am getting two wrapper elements in the XML output generated by Jackson. I would like to have only one.
I have a Java bean
@Entity
@Table(name = "CITIES")
@JacksonXmlRootElement(localName = "City")
public class City implements Serializable {
private static final long serialVersionUID = 21L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@JacksonXmlProperty(isAttribute = true)
private Long id;
@JacksonXmlProperty
private String name;
@JacksonXmlProperty
private int population;
// getters, setters etc
}
and a List wrapper class.
@JacksonXmlRootElement
public class Cities implements Serializable {
private static final long serialVersionUID = 22L;
@JacksonXmlProperty(localName = "City")
@JacksonXmlElementWrapper(localName = "MyCities")
private List<City> cities = new ArrayList<>();
public List<City> getCities() {
return cities;
}
public void setCities(List<City> cities) {
this.cities = cities;
}
}
I am getting this output, which has two wrapper elements. I would like to remove one of them.
<Cities>
<MyCities>
<City id="1">
<name>Bratislava</name>
<population>432000</population>
</City>
<City id="2">
<name>Budapest</name>
<population>1759000</population>
</City>
<City id="3">
<name>Prague</name>
<population>1280000</population>
</City>
<MyCities>
</Cities>
One of them comes from the ArrayList
, one from the class. How to get rid of one of the wrapper elements?
What I want to have is this:
<Cities>
<City id="1">
<name>Bratislava</name>
<population>432000</population>
</City>
<City id="2">
<name>Budapest</name>
<population>1759000</population>
</City>
<City id="3">
<name>Prague</name>
<population>1280000</population>
</City>
</Cities>
"Cities" is the root element, not a wrapper. Wouldn't removing the actual wrapper element "MyCities" work?
Adding @JacksonXmlElementWrapper(useWrapping = false)
could also help.
Replacing @JacksonXmlElementWrapper(localName = "MyCities")
with @JacksonXmlElementWrapper(useWrapping = false)
in Cities
should remove the additional wrapper element.
From the documentation:
@JacksonXmlElementWrapper
Allows specifying XML element to use for wrapping List and Map properties; or disabling use (with 'useWrapping' set to false).
The fix implemented in Cities
:
@JacksonXmlRootElement
public class Cities implements Serializable {
private static final long serialVersionUID = 22L;
@JacksonXmlProperty(localName = "City")
@JacksonXmlElementWrapper(useWrapping = false)
private List<City> cities = new ArrayList<>();
public List<City> getCities() {
return cities;
}
public void setCities(List<City> cities) {
this.cities = cities;
}
}
You could also disable the wrapping functionality directly in the mapper with mapper.setDefaultUseWrapper(false);
.
In this case you should simply remove @JacksonXmlElementWrapper(localName = "MyCities")
from cities
.
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