Gson:处理可以返回不同原语类型的json对象字段？

import com.google.gson.Gson;

public class Main {
    public static void main(String[] args) {
        String json = "{\"field1\": 123, \"field2\": 3.14, \"field3\": true, \"field4\": \"hello\"}";

        Gson gson = new Gson();
        MyObject obj = gson.fromJson(json, MyObject.class);

        System.out.println(obj.getField1());  // 输出：123
        System.out.println(obj.getField2());  // 输出：3.14
        System.out.println(obj.isField3());   // 输出：true
        System.out.println(obj.getField4());  // 输出："hello"
    }

    private static class MyObject {
        private int field1;
        private double field2;
        private boolean field3;
        private String field4;

        public int getField1() {
            return field1;
        }

        public double getField2() {
            return field2;
        }

        public boolean isField3() {
            return field3;
        }

        public String getField4() {
            return field4;
        }
    }
}