Merge pull request mouredev#4448 from Abel-ADE/main

#20 - Java

Author: Roswell468

Roadmap/20 - PETICIONES HTTP/java/Abel-ADE.java

@@ -0,0 +1,172 @@
+/*
+   <dependencies>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.10.1</version>
+        </dependency>
+    </dependencies>
+*/
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class Main {
+    public final static ArrayList<String> nameEvolves = new ArrayList<>();
+
+    public static void getEvolve(JsonObject json){
+        String nameEvolve = json.getAsJsonObject("species").get("name").getAsString();
+        nameEvolves.add(nameEvolve);
+
+        JsonArray evolves = json.getAsJsonArray("evolves_to");
+        if(evolves.size() > 0){
+            getEvolve(evolves.get(0).getAsJsonObject());
+        }
+    }
+
+    public static void main(String[] args) {
+        try {
+            System.out.println("Primera petición HTTP");
+
+            //Establecemos la conexón con la web
+            URL url = new URL("https://holamundo.day/");
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("GET");
+            connection.connect();
+
+            //Recuperamos el código de respuesta
+            int code = connection.getResponseCode();
+            System.out.println("Resultado: " + code);
+
+            //Leo el contenido de la web y lo guardo en una variable
+            Scanner scanner = new Scanner(connection.getInputStream());
+            StringBuilder html = new StringBuilder("");
+            while (scanner.hasNextLine()) {
+                html.append(scanner.nextLine());
+            }
+            scanner.close();
+
+            //Si la petición fue exitosa
+            if (code == 200) {
+                //Imprimo por consola el contenido de la web
+                System.out.println("Contenido de la web: ");
+                System.out.println(html);
+            }
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        /*DIFICULTAD EXTRA*/
+        try {
+            System.out.println("Poke api: ");
+
+            System.out.print("Introduce el nombre o id de un Pokemon: ");
+            Scanner scanner = new Scanner(System.in);
+            String nombre = scanner.nextLine();
+            System.out.println();
+
+            //Establecemos la conexón con la web
+            URL url = new URL("https://pokeapi.co/api/v2/pokemon/" + nombre);
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("GET");
+            connection.connect();
+            int code = connection.getResponseCode();
+
+            //Leo el contenido y lo guardo en una variable
+            scanner = new Scanner(connection.getInputStream());
+            StringBuilder json = new StringBuilder("");
+            while (scanner.hasNextLine()) {
+                json.append(scanner.nextLine());
+            }
+
+            //Si la petición fue exitosa
+            if (code == 200) {
+                //Imprimo por consola el contenido
+                Gson gson = new Gson();
+                JsonObject data = gson.fromJson(json.toString(), JsonObject.class);
+
+                String name = data.get("name").getAsString();
+                int id = data.get("id").getAsInt();
+                int weight = data.get("weight").getAsInt();
+                int height = data.get("height").getAsInt();
+
+                ArrayList<String> nameGames = new ArrayList<>();
+                JsonArray games = data.getAsJsonArray("game_indices");
+                for (int i = 0; i < games.size(); i++) {
+                    JsonObject game = games.get(i).getAsJsonObject();
+                    String nameGame = game.getAsJsonObject("version").get("name").getAsString();
+                    nameGames.add(nameGame);
+                }
+
+                ArrayList<String> nameTypes = new ArrayList();
+                JsonArray types = data.getAsJsonArray("types");
+                for (JsonElement element : types) {
+                    String nameType = element.getAsJsonObject().getAsJsonObject("type").get("name").getAsString();
+                    nameTypes.add(nameType);
+                }
+
+                //Establecemos conexión para recuperar evoluciones
+                url = new URL("https://pokeapi.co/api/v2/pokemon-species/"+id);
+                connection = (HttpURLConnection) url.openConnection();
+                connection.setRequestMethod("GET");
+                connection.connect();
+                code = connection.getResponseCode();
+
+                //Leo el contenido y lo guardo en una variable
+                scanner = new Scanner(connection.getInputStream());
+                StringBuilder jsonSpecies = new StringBuilder("");
+                while (scanner.hasNextLine()) {
+                    jsonSpecies.append(scanner.nextLine());
+                }
+
+                //Si la petición fue exitosa
+                if (code == 200) {
+                    JsonObject dataSpecies = gson.fromJson(jsonSpecies.toString(), JsonObject.class);
+                    url = new URL(dataSpecies.getAsJsonObject("evolution_chain").get("url").getAsString());
+                    connection = (HttpURLConnection) url.openConnection();
+                    connection.setRequestMethod("GET");
+                    connection.connect();
+                    code = connection.getResponseCode();
+
+                    //Leo el contenido y lo guardo en una variable
+                    scanner = new Scanner(connection.getInputStream());
+                    StringBuilder jsonEvolves = new StringBuilder("");
+                    while (scanner.hasNextLine()) {
+                        jsonEvolves.append(scanner.nextLine());
+                    }
+
+                    //Si la petición fue exitosa
+                    if (code == 200) {
+                        JsonObject dataEvolves = gson.fromJson(jsonEvolves.toString(), JsonObject.class);
+                        getEvolve(dataEvolves.getAsJsonObject("chain"));
+                    }
+                }
+
+                //Mostramos todos los datos del pokemon
+                System.out.println("Datos de la pokeApi: ");
+                System.out.println("Name: " + name);
+                System.out.println("Id: " + id);
+                System.out.println("Weight: " + weight);
+                System.out.println("Height: " + height);
+                System.out.println("Types: " + nameTypes);
+                System.out.println("Evolutions: " + nameEvolves);
+                System.out.println("Games: " + nameGames);
+            }
+
+            //Cerramos los recursos
+            scanner.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+    }
+}