SONField 无法序列化父类，该如何解决？

SONField 无法序列化父类

序列化父类

public class B extends C{ }

public class C { @JSONField(name = "no-c") private String no;

@JSONField(name = "city_c")
private String city;

public String getCity() {
    return city;
}

public void setCity(String city) {
    this.city = city;
}

public String getNo() {
    return no;
}
public void setNo(String no) {
    this.no = no;
}

}

B b = new B; b.setCity("c1") ···

此刻调用 String str = JSON.toJSONString(...) , 无法序列化city 为 city_c

原提问者GitHub用户JaryZhen