转换代码

    public static void main(String[] args) {
        Person person = new Person();
        person.setNAME("John");
        person.setAGE(30);
        person.setADDRESS("New York");

        Gson gson = new Gson();

        //String json = gson.toJson(person);
        String datas= JSON.toJSONString(person);
        System.out.println(datas);
}

@Data
class Person {
    private String NAME;
    private int AGE;
    private String ADDRESS;

    // getters and setters
}

最开始 把实体类转2次。

大家还是放弃吧