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Asked: 2020-08-29 22:52:47 +0800 CST 2020-08-29 22:52:47 +0800 CST

How to map an array of objects in json into an array of objects

  • 772

In an API when making a GET call, I am able to convert the response into its representation in a java object.

{
  "Id": "3-4779-841c-08f88e1d3889",
  "Data": "{'name':'nombre','city':'ciudad'}"
}

final HttpResponseBean httpResponseBean = this.httpIntegrator.getRequest(
                MessageFormat.format(
                    Dao.URL_PATTERN
                    , this.Scheme
                    , this.Url
                    , this.Port
                    , Dao.CONTEXT_PATH));

        final byte[] payload = httpResponseBean.getPayload();
        return mapper.readValue(payload, Bean.class);

This works perfectly but now I have to handle the response I get from a GET. But this time instead of managing to return a single value, I get the entire list of values. If I am able to map an object how could I map a response which I have an array of those objects in JSON format

[
        {
            "Id": "3-4779-841c-08f88e1d3889",
            "Data": "{'name':'nombre','city':'ciudad'}"
        }, 
        {
            "Id": "3-4779-841c-98f28e1d3689",
            "Data": "{'name':'nombre','city':'ciudad'}"
        },
        {
            "Id": "3-0729-891c-08f48s1d3889",
            "Data": "{'name':'nombre','city':'ciudad'}"
        }, 
]
java

1 Answers

  1. Best Answer

    Well the flow is like the one above, the GET request is made and with the response the following is done:

        final byte[] payload = httpResponseBean.getPayload();
    final String decodedPayload = new String(payload, StandardCharsets.UTF_8);
    final List<Bean> beans= Arrays.asList(mapper.readValue(decodedPayload, Bean[].class));

    final List<String> beanIds = new ArrayList<>();
    beans.forEach(bean -> {
        beanIds.add(beans.getBeanId());
    });

    return beanIds;
    • 0