Example usage for com.google.gson Gson Gson

Introduction

In this page you can find the example usage for com.google.gson Gson Gson.

Prototype

public Gson() 

Source Link

Document

Constructs a Gson object with default configuration.

Usage

From source file:GetCommenterServlet.java

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    try (PrintWriter out = response.getWriter()) {
        /* TODO output your page here. You may use following sample code. */
        try {/*from   w  ww .  ja v  a  2s .co  m*/
            emf = Persistence.createEntityManagerFactory("FileUploadPU");
            em = emf.createEntityManager();

            List<String> commenter = new ArrayList<String>();

            for (Commentnew i : (List<Commentnew>) em.createNamedQuery("Commentnew.findAll").getResultList()) {

                commenter.add(i.getCommenter());

            }

            String json = new Gson().toJson(commenter);
            out.write(json);
        } catch (Exception e) {
            System.out.println(e);
        } finally {
            em.close();
            emf.close();
        }
    }
}

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From source file:Servlet.java

/**
 * Handles the HTTP <code>GET</code> method.
 *
 * @param request servlet request//ww w  . j  a  va2 s .co  m
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    try {

        Connection connection = null;
        SQLConnect msql = new SQLConnect();
        Gson gson = new Gson();
        JsonElement jsonElmnt;
        JsonArray jsonArr;

        ArrayList<Alumnos> alumn = new ArrayList<Alumnos>();

        connection = msql.conectar();

        alumn = msql.getListaAlumn(connection); //Codigo y nombre de los alumnos listados

        jsonElmnt = gson.toJsonTree(alumn);
        jsonArr = jsonElmnt.getAsJsonArray();

        response.setContentType("application/json");
        response.getWriter().print(jsonArr);

    } catch (SQLException ex) {
        Logger.getLogger(Servlet.class.getName()).log(Level.SEVERE, null, ex);
    }

}

---

From source file:Servlet.java

/**
 * Handles the HTTP <code>POST</code> method.
 *
 * @param request servlet request//from w  w  w. j ava 2 s. c o  m
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    try {

        String code = request.getParameter("code");
        Connection connection = null;
        SQLConnect msql = new SQLConnect();
        Gson gson = new Gson();
        String jsonElmnt;

        Alumnos alumn = new Alumnos();

        connection = msql.conectar();

        alumn = msql.getAssigTutorias(connection, Integer.parseInt(code));

        jsonElmnt = gson.toJson(alumn);

        response.setContentType("application/json");
        response.getWriter().print(jsonElmnt);

    } catch (SQLException ex) {
        Logger.getLogger(Servlet.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:RawCollectionsExample.java

License:Apache License

@SuppressWarnings({ "unchecked", "rawtypes" })
public static void main(String[] args) {
    Gson gson = new Gson();
    Collection collection = new ArrayList();
    collection.add("hello");
    collection.add(5);//from   w ww  .jav a2  s . c o m
    collection.add(new Event("GREETINGS", "guest"));
    String json = gson.toJson(collection);
    System.out.println("Using Gson.toJson() on a raw collection: " + json);
    JsonParser parser = new JsonParser();
    JsonArray array = parser.parse(json).getAsJsonArray();
    String message = gson.fromJson(array.get(0), String.class);
    int number = gson.fromJson(array.get(1), int.class);
    Event event = gson.fromJson(array.get(2), Event.class);
    System.out.printf("Using Gson.fromJson() to get: %s, %d, %s", message, number, event);
}

---

From source file:Exportador.java

public static void escribir(String nombreDeArchivo, Agenda agenda) {
    FileWriter fichero = null;/*from w  ww .  j  a  va2 s . c  o  m*/
    PrintWriter pw = null;

    Gson gson = new Gson();
    String JSON = gson.toJson(agenda);

    try {
        fichero = new FileWriter(nombreDeArchivo);
        pw = new PrintWriter(fichero);
        pw.print(JSON);

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            // Nuevamente aprovechamos el finally para
            // asegurarnos que se cierra el fichero.
            if (null != fichero)
                fichero.close();
        } catch (Exception e2) {
            e2.printStackTrace();
        }
    }
}

---

From source file:AOP.java

public static void main(String[] args) throws Exception {
    RequestController rc = new RequestController();

    rt = Runtime.instance();/*www  .  j  a  v a 2 s. c om*/

    World world = new World();

    int prisonerCount = 8;
    String[] prisonerNames = { "Randy", "Stan", "Kyle", "Eric", "Kenny", "Chef", "Butters", "MrMackey" };

    createContainer();

    Random rand = new Random(System.currentTimeMillis());

    Gson gson = new Gson();
    String json = gson.toJson(world);
    rc.sendPostReq(0, json);

    try {
        for (int i = 0; i < prisonerCount; i++) {
            Object[] agentArgs = new Object[3];
            agentArgs[0] = world;
            agentArgs[1] = world.getRooms().get(0);
            agentArgs[2] = new Point(rand.nextInt(199), rand.nextInt(199));

            mainContainer.createNewAgent(prisonerNames[i], "aop.agents.Prisoner", agentArgs).start();
        }

    } catch (StaleProxyException ex) {
        Logger.getLogger(AOP.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:iosActivityListener.java

public UserActivity strToActivity(String json) {

    Gson gson = new Gson();

    GsonMessage gsonMessage;/*from   w w w  .ja  v  a2 s .  c om*/
    gsonMessage = gson.fromJson(json, GsonMessage.class);

    if (gsonMessage.flag.equals("true")) {
        Flag flag = new Flag(new User(gsonMessage.user_id, gsonMessage.channel_name));
        return flag;

    } else {
        Date date = new Date(gsonMessage.time);
        System.out.println("Date: " + date.toString());
        Message message = new Message(gsonMessage.message,
                new User(gsonMessage.user_id, gsonMessage.channel_name), date, gsonMessage.channel_name);
        return message;
    }

}

---

From source file:crearVenta.java

License:Open Source License

/**
 * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
 * methods./*from  www  . j  a va2 s  .co m*/
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    try (PrintWriter out = response.getWriter()) {
        HttpSession ses = request.getSession();
        GestoSAT gestor = (GestoSAT) ses.getAttribute("gestor");
        Cliente cli;

        int idCliente = Integer.parseInt(request.getParameter("id"));

        Gson gJson = new Gson();
        Map material = (HashMap) gJson.fromJson(request.getParameter("material"), HashMap.class); // Parse JSON

        if (idCliente > 0) {
            cli = gestor.getCliente(idCliente);
        } else {
            cli = new Cliente(request.getParameter("cliente[nombre]"),
                    request.getParameter("cliente[apellidos]"), request.getParameter("cliente[NIF]"),
                    request.getParameter("cliente[provincia]"), request.getParameter("cliente[poblacion]"),
                    Integer.parseInt(request.getParameter("cliente[cp]")),
                    request.getParameter("cliente[calle]"), request.getParameter("cliente[numero]"),
                    request.getParameter("cliente[escalera]"),
                    Integer.parseInt(request.getParameter("cliente[piso]")),
                    request.getParameter("cliente[puerta]"),
                    Integer.parseInt(request.getParameter("cliente[tlfFijo]")),
                    Integer.parseInt(request.getParameter("cliente[tlfMovil]")),
                    request.getParameter("cliente[email]"), request.getParameter("cliente[observaciones]"),
                    gestor);
            idCliente = gestor.crearCliente(cli);
        }

        out.print(gestor.crearVenta(idCliente, new Albaran(request.getParameter("concepto"),
                request.getParameter("entrega[provEntrega]"), request.getParameter("entrega[pobEntrega]"),
                Integer.parseInt(request.getParameter("entrega[cpEntrega]")),
                request.getParameter("entrega[calleEntrega]"), request.getParameter("entrega[numEntrega]"),
                request.getParameter("entrega[escaleraEntrega]"),
                Integer.parseInt(request.getParameter("entrega[pisoEntrega]")),
                request.getParameter("entrega[puertaEntrega]"), material, request.getParameter("observaciones"),
                cli, gestor)));
    }
}

---

From source file:InventoryDeleteItemServlet.java

License:Open Source License

@Override
public HttpResponse doWork(HttpRequest request, String rootDirectory) {
    HttpResponse response;//from   ww w  .j  a v a  2s .co m
    try {
        String inventoryUrl = "./web/inventory.json";
        File inventory = new File(inventoryUrl);

        StringBuilder sb = new StringBuilder();
        Scanner sc = new Scanner(inventory);
        while (sc.hasNext()) {
            sb.append(sc.nextLine());
        }
        sc.close();

        // Add this new book to the list of existing books
        Gson gson = new Gson();
        InventoryObject[] inventoryArray = gson.fromJson(sb.toString(), InventoryObject[].class);
        ArrayList<InventoryObject> inventoryList = new ArrayList<InventoryObject>(
                Arrays.asList(inventoryArray));

        String body = new String(request.getBody());
        System.out.println(body);

        // Find existing item and remove it
        int id = Integer.parseInt(body.split("=")[1]);
        for (InventoryObject item : inventoryList) {
            if (item.getID() == id) {
                inventoryList.remove(item);
                break;
            }
        }

        // Serialize new list
        Gson gsonBuilder = new GsonBuilder().setPrettyPrinting().create();
        String arrayListToJson = gsonBuilder.toJson(inventoryList);

        BufferedWriter bw = new BufferedWriter(new FileWriter(inventory));
        bw.write(arrayListToJson);
        bw.close();

        response = HttpResponseFactory.create200OK(inventory, Protocol.CLOSE);
    } catch (Exception e) {
        response = HttpResponseFactory.create404NotFound(Protocol.CLOSE);
    }
    return response;
}

---

From source file:saveChangeAlbaran.java

License:Open Source License

/**
 * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
 * methods./* www  .  ja va2s. c o  m*/
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    try (PrintWriter out = response.getWriter()) {
        HttpSession ses = request.getSession();
        GestoSAT gestor = (GestoSAT) ses.getAttribute("gestor");

        Gson gJson = new Gson();
        Map empleados = (HashMap) gJson.fromJson(request.getParameter("10"), HashMap.class); // Parse JSON
        Map material = (HashMap) gJson.fromJson(request.getParameter("11"), HashMap.class); // Parse JSON

        int idAlbaran = Integer.parseInt(request.getParameter("12"));

        Albaran albaran = gestor.getAlbaran(idAlbaran);

        out.print(albaran.actualizar(idAlbaran, request.getParameter("8"), request.getParameter("0"),
                request.getParameter("1"), Integer.parseInt(request.getParameter("2")),
                request.getParameter("3"), request.getParameter("4"), request.getParameter("5"),
                Integer.parseInt(request.getParameter("6")), request.getParameter("7"), empleados, material,
                request.getParameter("9")));
    }
}

---

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