com.gemstore.servlet.Tables.java Source code

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Here is the source code for com.gemstore.servlet.Tables.java
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/*
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 * and open the template in the editor.
 */
package com.gemstore.servlet;

import com.gemstore.entity.Customer;
import com.gemstore.service.util.ServiceUtil;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Photon
 */
@WebServlet(name = "Tables", urlPatterns = { "/Tables" })
public class Tables extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     *
     * @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()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet Tables</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet Tables at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @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 {
        System.out.println("com");
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @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 {
        // processRequest(request, response);

        String text = request.getParameter("choosen");
        System.out.println(text);
        JsonArray jsonArray = null;
        if (text.equalsIgnoreCase("customer")) {
            List<Customer> list = new ServiceUtil<Customer>().getEntitiesByPaging(Customer.class, 1);
            // List<Customer> list=new ServiceUtil<Customer>().getAllEntities(Customer.class);
            Gson gson = new Gson();
            JsonElement element = gson.toJsonTree(list, new TypeToken<List<Customer>>() {
            }.getType());
            jsonArray = element.getAsJsonArray();
        }
        response.setContentType("application/json");
        response.getWriter().print(jsonArray);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}