Gson: Serialization from JSON to java object whit inner object list -

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i have :

public class requisicionimpresion {   private list<files> archivos;  private string impresora;  ... // getter & setters  }       public class filedto {  private string  lote;  private long    iddoc;  private string  nombre;  private string  ruta;  //getter & setters  }

i'm getting json:

{"archivos":[{"lote":"julio_20160125_001","iddoc":9038,"nombre":"/siat/anexo/pruebas/anexo 1.pdf","ruta":"/siat/anexo/pruebas/anexo 1.pdf"},         {"lote":"julio_20160125_001","iddoc":9185,"nombre":"/siat/anexo/pruebas/anexo 1.pdf","ruta":"/siat/anexo/pruebas/anexo 1.pdf"},         {"lote":"julio_20160125_001","iddoc":9184,"nombre":"/siat/anexo/pruebas/anexo 1.pdf","ruta":"/siat/anexo/pruebas/anexo 1.pdf"},         {"lote":"julio_20160125_001","iddoc":9039,"nombre":"/siat/anexo/pruebas/anexo 1.pdf","ruta":"/siat/anexo/pruebas/anexo 1.pdf"}],         "impresora":"00000061677"}

i need serialize object requisionimpresion filled values. don't know how navigate element 'archivos' , other elements.

i have done with:

nuevarequsicionimpresion = jsonutil.convertjsontoobject(json);

where:

jsonutil.java   ... public final t convertjsontoobject(final string json) {         t valor = null;          if (json != null) {             gson gson = new gson();              valor = (t) gson.fromjson(json, new typetoken<t>() {             } .gettype());         }          return valor;     }  ...

however i'm getting exception:

java.lang.classcastexception: com.google.gson.internal.stringmap cannot cast java.io.serializable

in utility class jsonutil i've updated method:

... @suppresswarnings("unchecked")     public final t convertjsontoobject(final string json, final t clase) {         t valor = null;          if (json != null) {             gson gson = new gson();             valor = (t) gson.fromjson(json, clase.getclass());         }          return valor;     }  ...

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