I want to create a xml from a html form with the help of a Spring MVC ModelAttribute (Person) and Jackson.
form:
....
<input name="name"/>
<input name="birthday"/>
<input name="address.street/>
<input name="address.city/>
....
POJO:
@JacksonXmlRootElement(localName = "person")
@JsonInclude(Include.NON_DEFAULT)
public class Person implements Serializable {
@JsonIgnore
private Long id;
@JacksonXmlProperty(localName = "name")
private String name;
@JacksonXmlProperty(localName = "email")
private String email;
@JacksonXmlProperty(localName = "address")
private Address address;
private String birthday;
//getter and setter
}
@JsonInclude(Include.NON_EMPTY)
public class Address implements Serializable {
private Long id;
private String street;
private String streetNumber;
private String postalcode;
private String city;
//getter and setter
}
create XML in Controller:
@RequestMapping("saveperson")
public String savePerson(@ModelAttribute final Person person, final ModelMap model) {
final ObjectMapper xmlMapper = new XmlMapper();
final String xml = xmlMapper.writeValueAsString(person);
return "redirect:/listpersons";
}
output xml:
<person>
<name>John</name>
<email>[email protected]</email>
<address/>
</person>
How can i exclude the empty Objects from XML?
I tried to set all empty strings in the ModelAttribute to null:
@InitBinder
public void initBinder(WebDataBinder binder) {
binder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
}
But it doesn't work. I also tried @JsonInclude(Include.NON_EMPTY) and @JsonInclude(Include.NON_NULL) But it always includes empty objects in the XML.
My second question is: When i want to bind a list of addresses to the html form. What is the best way to do this?
....
<input name="name"/>
<input name="birthday"/>
<input name="address1.street/>
<input name="address1.city/>
<input name="address2.street/>
<input name="address2.city/>
....
@JacksonXmlRootElement(localName = "person")
@JsonInclude(Include.NON_DEFAULT)
public class Person implements Serializable {
@JsonIgnore
private Long id;
@JacksonXmlProperty(localName = "name")
private String name;
@JacksonXmlProperty(localName = "email")
private String email;
@JsonIgnore
private Address address1;
@JsonIgnore
private Address address2;
//add address1 and address2 in the getter or dto for the ModelAttribute?
@JacksonXmlElementWrapper(localName = "addresses")
@JacksonXmlProperty(localName = "address")
private List<Address> address;
private String birthday;
//getter and setter
}
Thanks!
ChrisIsHere!
I just ran into this issue and was happy to see someone had asked the same question but sad that no one had responded.
After tinkering, I found two possible solutions for your first question regarding not including empty values in XML output.
First was including @JsonInclude(JsonInclude.Include.NON_EMPTY) on top of my model. So for you, in this situation, I would suspect this would work:
@JacksonXmlRootElement(localName = "person")
@JsonInclude(JsonInclude.Include.NON_EMPTY)
public class Person implements Serializable {
@JsonIgnore
private Long id;
@JacksonXmlProperty(localName = "name")
private String name;
@JacksonXmlProperty(localName = "email")
private String email;
@JacksonXmlProperty(localName = "address")
private Address address;
private String birthday;
//getter and setter
}
This does away with your previous Include.NON_DEFAULT, which I hope you can live without if you go this route.
Second, there also appeared to be an alternative solution that I did not go with, which would have us altering the XmlMapper directly like this:
XmlMapper xmlMapper = new XmlMapper();
xmlMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
I hope one of these helps, ten months late.