确定。找到了答案。
所有需要做的就是在派生类中创建一个setter方法，例如

Ok. Found the answer. All that needs to be done is to create a setter method in the derived class such as

    @XmlElement(name = "newField1")
    public void setField1(String field1) {
        this.field1 = field1;
    }

Ofc，这假设您正在访问的字段具有受保护的访问权限基类。否则你可能需要稍微肮脏并做一些反思;）

Ofc, this assumes that the field that you are accessing has protected access in the base class. Else you might need to get a little dirty and do some reflection ;)