How to Convert Array JSON in a Java Object [duplicate]

Question

i need to convert this JSON to a Java Object:

{"estabelecimento":[{"id":"5","idUsuario":"5","razaoSocial":"Bibi LTDA","nomeFantasia":"BibiPizza","telefone":"22121212","email":"[email protected]","gostaram":"0"},{"id":"8","idUsuario":"1","razaoSocial":"Nestor Latuf LTDA","nomeFantasia":"Nestor Sorvetes","telefone":"32343233","email":"[email protected]","foto":"","gostaram":"0"},{"id":"9","idUsuario":"1","razaoSocial":"Comercio Alimenticio Rivaldo","nomeFantasia":"Rogers Burguer","telefone":"210021020","email":"[email protected]","foto":"","gostaram":"0"}]}

I try this, but not work:

 //JSONArray jArr = new JSONArray(br.toString());  
        
        //JSONObject jObj = new JSONObject(br.toString());
        
        //JSONArray jArr = jObj.getJSONArray("list");
        
        JSONArray jArr = new JSONArray(br.toString());

        for (int i=0; i < jArr.length(); i++) {
            JSONObject obj = jArr.getJSONObject(i);
            estabelecimento.setId(obj.getLong("id"));
            estabelecimento.setIdUsuario(obj.getLong("idUsuario"));
            estabelecimento.setRazaoSocial(obj.getString("razaoSocial"));
            estabelecimento.setNomeFantasia(obj.getString("nomeFantasia"));
            estabelecimento.setTelefone(obj.getString("telefone"));
            estabelecimento.setEmail(obj.getString("email"));
            estabelecimento.setGostaram(obj.getInt("gostaram"));
            
            estabelecimentoList.add(estabelecimento);
        }
        con.disconnect();

How can i obtain a Java Object? Someone can help? tks.

You don't say which JSON libraries you use and under which operating system you work. Plus that there are tons of examples for this published elsewhere. — Nantoka
– Nantoka, Commented May 25, 2014 at 1:25
If it's a String it already is a Java object. Did you want to be any more specific than that? — Hot Licks
– Hot Licks, Commented May 25, 2014 at 2:28

Marco Di Scala · Accepted Answer · 2014-05-25 01:20:01Z

2

You can use the Gson lib of google:

public class MyClass {

    private int data1 = 100;
    private String data2 = "hello";
    private List<String> list = new ArrayList<String>() {
      {
        add("String 1");
        add("String 2");
        add("String 3");
      }
    };

    //getter and setter methods needed


}


String str = {"data1":100,"data2":"hello","list":["String 1","String 2","String 3"]};
com.google.gson.Gson gson = new com.google.gson.Gson();

//To convert json string to class use fromJson
MyClass obj = gson.fromJson(str, MyClass .class);

//To convert class object to json string use toJson
String json = gson.toJson(obj);

answered May 25, 2014 at 1:20

Marco Di Scala

4841 gold badge7 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

NightSkyCode Over a year ago

Yes Gson will do what you are searching for. Look up Gson on google.

Calixto Over a year ago

Thanks man! But now i have other problem: 05-26 12:31:29.128: W/System.err(1514): org.json.JSONException: Value java.io.BufferedReader@40548f20 of type java.lang.String cannot be converted to JSONObject I will post in another question. tks!

Oleg Gryb · Accepted Answer · 2014-05-25 01:28:58Z

0

At high level two major steps:

Generate a Java class from your JSON, e.g. by using this generator or similar: http://www.jsonschema2pojo.org/

Use Jackson processor to deserialize your JSON file:

 ObjectMapper mapper = new ObjectMapper();
 YourGeneratedClass obj = (YourGeneratedClass) mapper.readValue(new File("path-to-your-json-file"), YourGeneratedClass.class);

More about Jackson: http://jackson.codehaus.org/

You can also create YourGeneratedClass manually if you feel comfortable enough with this.

answered May 25, 2014 at 1:28

Oleg Gryb

5,3091 gold badge35 silver badges46 bronze badges

Collectives™ on Stack Overflow

How to Convert Array JSON in a Java Object [duplicate]

2 Answers 2

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Linked

Related