how to keep attribute order?

[yidou120]

I use @JsonOrder，but attribute that use attribute is true cannot order correctly. this annotation only useful for property field.

[cowtowncoder]

Attributes should be output in specific order according to @JsonPropertyOrder, although in XML attribute order has no semantic meaning. Do you have an example case showing different ordering?

[yidou120]

this is pojo defined.

@JacksonXmlRootElement(localName = "person")
@Data
public class Person {
    @JacksonXmlProperty(isAttribute = true)
    private String email;
    @JacksonXmlProperty(isAttribute = true, localName = "person_name")
    private String name;
    @JacksonXmlProperty(isAttribute = true)
    private int age;

    private Adress adress;
    @JacksonXmlElementWrapper(useWrapping = false)
    @JacksonXmlProperty(localName = "friend")
    private List<Friend> friendList;
}

[yidou120]

this is output, age attribute is front of name.

[yidou120]

I use @JsonPropertyOrder(value = {"email, name, age"}) this annotation, it seems not useful.

[cowtowncoder]

Maybe try using person_name instead of age for the annotation? (both should work, ideally, but maybe there's something preventing use of original name before renaming).

And yes, @JsonPropertyOrder should work.

One thing to make sure is that Lombok (since that is used I think?) does not remove any annotations on generated classes.

[yidou120]

yes, I tried to use person_name instead of name, but order still wrong. and lombok does not remove any annotations on generated classes.

[cowtowncoder]

@yidou120 Your problem is here:

I use 

@JsonPropertyOrder(value = {"email, name, age"})

this annotation, it seems not useful.

where you accidentally have single String, instead of 3 Strings like so:

@JsonPropertyOrder(value = {"email", "name", "age"})