LanguageServlet.java Source code

Introduction

Here is the source code for LanguageServlet.java

Source

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import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.util.HashMap;
import java.util.Map;

/**
 *
 * @author user
 */
public class LanguageServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //Define action
        String action = request.getParameter("action");
        //Define data
        String data = request.getParameter("data");

        //Create locale object
        Locale locale = null;
        //Create resource bundle object
        ResourceBundle resourceBundle = null;

        //Create key - value pair collection for response
        Map<String, String> map = new HashMap<String, String>();

        //Here i use Gson library for working with Json
        Gson gson = new GsonBuilder().create();

        //Based on action i can switch to different options.
        //I print predefined text to output just for debugging
        try {
            if (action.equals("changeLang")) {
                if (data.equals("en")) {
                    locale = new Locale("en", "EN");
                    resourceBundle = ResourceBundle.getBundle("i18n.Bundle", locale);
                    System.out.println(resourceBundle.getString("NAME"));
                    System.out.println(resourceBundle.getString("LAST_NAME"));
                    System.out.println(resourceBundle.getString("LANGUAGE"));
                } else if (data.equals("ru")) {
                    locale = new Locale("ru", "RU");
                    resourceBundle = ResourceBundle.getBundle("i18n.Bundle", locale);
                    System.out.println(resourceBundle.getString("NAME"));
                    System.out.println(resourceBundle.getString("LAST_NAME"));
                    System.out.println(resourceBundle.getString("LANGUAGE"));
                } else if (data.equals("de")) {
                    locale = new Locale("de", "DE");
                    resourceBundle = ResourceBundle.getBundle("i18n.Bundle", locale);
                    System.out.println(resourceBundle.getString("NAME"));
                    System.out.println(resourceBundle.getString("LAST_NAME"));
                    System.out.println(resourceBundle.getString("LANGUAGE"));
                }
            }
            //Put data to collection.Keys are equals to index.html label's id values.
            map.put("name", resourceBundle.getString("NAME"));
            map.put("lastname", resourceBundle.getString("LAST_NAME"));
            map.put("language", resourceBundle.getString("LANGUAGE"));

            //Send response to browser.
            response.getWriter().write(gson.toJson(map));
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}