Convert JSON to Java object second parameter null using Gson library

Question

I´m having a trouble converting a JSON to a Java Object using Gson library.

here is my Dispositivo.java class

public class Dispositivo {

private String codigo;
private String nombreusuario;

public Dispositivo(){}

public Dispositivo(String codigo, String nombreusuario) {
    super();
    this.setCodigo(codigo);
    this.setNombreusuario(nombreusuario);
}

public String getCodigo() {
    return codigo;
}

public void setCodigo(String codigo) {
    this.codigo = codigo;
}

public String getNombreusuario() {
    return nombreusuario;
}

public void setNombreusuario(String nombreusuario) {
    this.nombreusuario = nombreusuario;
}  public Dispositivo transformJSONStringToDispositivoObject(String dispositivoJSON) {

    Gson gson = new GsonBuilder().create();
    Dispositivo dispositivo = gson.fromJson(dispositivoJSON, Dispositivo.class);

    System.out.println("Dispositivo convertido de JSON a Objeto: "+dispositivo.getCodigo()+":"+dispositivo.getNombreusuario()+":");
    return dispositivo;
}
}

Using the method
Dispostivo d = new Dispositivo(transformJSONStringToDispositivoObject("{"codigo":"5555555","nombreususario":"usuarioDePrueba"}"));

It returns a Dispositivo("5555555",null);

What am I doing wrong?

Richard Miskin · Accepted Answer · 2014-03-08 15:15:50Z

1

You have a typo in field name:

Dispostivo d = new Dispositivo(transformJSONStringToDispositivoObject("
{"codigo":"5555555","nombreususario":"usuarioDePrueba"}"));

nombreususario is not the field name in your class, it's nombreusuario. Change the JSON string or the name of your class field and then it will work.

edited Mar 8, 2014 at 15:15

Richard Miskin

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answered Mar 8, 2014 at 15:11

sakura

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