JSON.toJSONString()序列化丢失数据

 public static void main(String[] args) {

        List<StationChangeNotify> list = new ArrayList<>();
        list.add(StationChangeNotify.builder().operatorId("3123").stationId("2323").build());
        System.out.println(JSON.toJSONString(list));
    }


    @Builder
    static class StationChangeNotify{
        private String stationId;
        private String operatorId;
    }

以上代码打印结果为[{}] ,其中的数据都丢失了；

是因为没有get方法

在com.alibaba.fastjson.serializer.JavaBeanSerializer中

com.alibaba.fastjson.serializer.JavaBeanSerializer#write(com.alibaba.fastjson.serializer.JSONSerializer, java.lang.Object, java.lang.Object, java.lang.reflect.Type, int, boolean)

 方法中会遍历

for (int i = 0; i < getters.length; ++i) {

}

getters方法依次写入属性

 public static void main(String[] args) {

        List<StationChangeNotify> list = new ArrayList<>();
        list.add(StationChangeNotify.builder().operatorId("3123").stationId("2323").build());
        System.out.println(JSON.toJSONString(list));
    }


    @Builder
    @Data
    static class StationChangeNotify{
        private String stationId;
        private String operatorId;
    }

加上get方法后，输出正确