指定JSON.toJSONString中实体类属性的输出顺序

最近在使用JSON.toJSONString过程中出现实体类的属性与转换之前的顺序不一致

public static void main(String[] args) {

        Person person = new Person();

        person.setName("Tom");

        person.setAge(20);

        person.setGender("Male");

        person.setHeight(180.5);

        person.setWeight(80.5);

        System.out.println(JSON.toJSONString(person));

    }

使用注解指定属性的输出顺序

第一种：通过在实体类添加@JSONType(orders={"name","age","gender","height","weight"})

@JSONType(orders={"name","age","gender","height","weight"})

public class Person {

    private String name;

    private Integer age;

    private String gender;

    private Double height;

    private Double weight;

}

第二种：在属性上添加@JSONField(ordinal = 1)

public class Person {

    @JSONField(ordinal = 1)

    private String name;

    @JSONField(ordinal = 2)

    private Integer age;

    @JSONField(ordinal = 3)

    private String gender;

    @JSONField(ordinal = 4)

    private Double height;

    @JSONField(ordinal = 5)

    private Double weight;

}