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POUnable to map json string to java object using jackson API
 

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  1. POUnable to map json string to java object using jackson API
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    <p>I am writing a web service (server + client). I am able to make a service and it returns me the following json</p> <pre><code>{ "cities": { "city": [ { "name": "New Delhi", "population": "19M", "telephonecode": "011" }, { "name": "Mumbai", "population": "21M", "telephonecode": "022" }, { "name": "Chennai", "population": "10M", "telephonecode": "044" } ] } </code></pre> <p>}</p> <p>my POJO's are </p> <pre><code>@XmlRootElement(name = "cities") public class RestFulCities { List&lt;RestFulCity&gt; restFulCityList; @XmlElement(name = "city") public List&lt;RestFulCity&gt; getRestFulCityList() { return restFulCityList; } public void setRestFulCityList(List&lt;RestFulCity&gt; restFulCityList) { this.restFulCityList = restFulCityList; } } @XmlRootElement(name = "city") public class RestFulCity { private String name; private String telephonecode; private String population; public RestFulCity(String name, String telephonecode, String population) { this.name = name; this.telephonecode = telephonecode; this.population = population; } public RestFulCity(City city) { this.name = city.getName(); this.telephonecode = city.getTelephonecode(); this.population = city.getPopulation(); } @XmlElement public String getName() { return name; } @XmlElement public String getTelephonecode() { return telephonecode; } @XmlElement public String getPopulation() { return population; } } </code></pre> <p>Now I want to write a client which will map this json to my POJO so that I get a RestFulCities Object populated in java</p> <p>My client code is below: </p> <pre><code>public class Client { static final String REST_URI = "http://localhost:8080/springrest/rest/"; static final String CITIES = "cities"; public static void main(String[] args) { String s = ""; WebClient plainAddClient = WebClient.create(REST_URI); plainAddClient.path(CITIES).accept("application/json"); s = plainAddClient.get(String.class); try { RestFulCities citiesObject = new ObjectMapper().readValue(s, RestFulCities.class); for(RestFulCity city : citiesObject.getRestFulCityList()) { System.out.println("----------START---------"); System.out.println(city.getName()); System.out.println(city.getPopulation()); System.out.println(city.getTelephonecode()); System.out.println("---------END----------"); } } catch (JsonParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (JsonMappingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } </code></pre> <p>But the issue is: I am getting the following exception</p> <pre><code>org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "cities"(Class com.techartifact.example.spring.model.RestFulCities), not marked as ignorable at [Source: java.io.StringReader@1d35bf2; line: 1, column: 12] (through reference chain: com.techartifact.example.spring.model.RestFulCities["cities"]) </code></pre> <p>When I am using below property:</p> <pre><code>@JsonIgnoreProperties(ignoreUnknown = true) </code></pre> <p>Although I donot get the exception, but my <strong>restFulCityList is null</strong> which is not desired</p> <p>Please help</p>
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    1. USBhuvan
    1. USBhuvan
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      1. VTUpMod
    1. COWhy do you have twice `@XmlRootElement(name = "city")` ? You haven't defined anything with `@XmlRootElement(name = "cities")` and I think this should be the `List<RestFulCity>`
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      1. USKonstantin Yovkov
 

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