java - 将 Decimal128 序列化为 JSON

Question

我正在使用 Spring Boot 创建一个 api，在其中从 mongodb 检索值。我面临的问题是 Decimal128 字段序列化如下:

"userid": {
  "high": 3476778912330022912,
  "low": 10776,
  "naN": false,
  "infinite": false,
  "finite": true,
  "negative": false
}

这是我的 Controller 的主体:

var wrappers = new EmbeddedWrappers(false);

var collection = mongoTemplate.getCollection("blah");

var result = collection.find().limit(1000).into(new ArrayList<>());

if (result == null) {
  return ResponseEntity.notFound().build();
}

return ResponseEntity.ok(new Resources<>(Arrays.asList(wrappers.wrap(result))));

有什么想法可以正确序列化 Decimal128 值，以便我只拥有该值本身吗？

Answer 1

根据评论:

@Configuration
public class ObjectMapperConfig {

  @Bean
  public ObjectMapper objectMapper() {
    var mapper = new ObjectMapper();

    var module = new SimpleModule();
    module.addSerializer(Decimal128.class, new Decimal128Serializer());
    mapper.registerModule(module);

    return mapper;
  }

  private static class Decimal128Serializer extends JsonSerializer<Decimal128> {
    @Override
    public void serialize(Decimal128 v, JsonGenerator g, SerializerProvider p) throws IOException {
      g.writeNumber(v.bigDecimalValue());
    }
  }
}