Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package cz.pchmelar.ddw.homework1; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParser; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import org.apache.commons.io.IOUtils; 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 filletzz */ @WebServlet(name = "MainServlet", urlPatterns = { "/MainServlet" }) public class MainServlet 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>Simpsons Episode Analyzer</title>"); out.println( "<link rel=\"stylesheet\" href=\"http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css\">"); out.println( "<script src=\"https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js\"></script>"); out.println( "<script src=\"http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js\"></script>"); out.println("</head>"); out.println("<body style=\"background-color: #A0D1F5\">"); out.println("<div class=\"container\">"); out.println("<br>"); out.println("<br>"); out.println( "<a href=\"/ddw-homework1/MainServlet\"><img src=\"http://www.returndates.com/backgrounds/simpsons.logo.png\" class=\"img-responsive center-block\" style=\"width: 50%; height: 50%\"></a>"); out.println("<br>"); out.println("<br>"); //GET JSON of all simpsons episodes String urlString = "http://api.tvmaze.com/singlesearch/shows?q=simpsons&embed=episodes"; URL url = new URL(urlString); URLConnection conn = url.openConnection(); InputStream is = conn.getInputStream(); String JSON = IOUtils.toString(is, "UTF-8"); //print season/episode/name for every episode in JSON JsonElement jelement = new JsonParser().parse(JSON); JsonObject jobject = jelement.getAsJsonObject(); jobject = jobject.getAsJsonObject("_embedded"); JsonArray jarray = jobject.getAsJsonArray("episodes"); out.println("<table class=\"table table-bordered table-hover\" style=\"background-color: #FFFFFF\">"); out.println("<thead><tr><th>Season</th><th>Episode</th><th>Name</th></tr></thead><tbody>"); for (int i = 0; i < jarray.size(); i++) { jobject = jarray.get(i).getAsJsonObject(); String season = jobject.get("season").toString(); if (season.length() == 1) season = "0" + season; String episode = jobject.get("number").toString(); if (episode.length() == 1) episode = "0" + episode; out.println("<tr>"); out.println("<td>" + season + "</td>"); out.println("<td>" + episode + "</td>"); out.println("<td><a href=\"/ddw-homework1/DetailServlet?season=" + season + "&episode=" + episode + "\">" + jobject.get("name").toString() + "</a></td>"); out.println("</tr>"); } out.println("</tbody></table>"); out.println("</container>"); 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 { 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); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }