Poprawki przykładów RestKlient (bez modelu)

PC28-RestKlient/src/main/java/rest_klient/Klient01_URL.java

@@ -9,7 +9,7 @@ public class Klient01_URL {
     public static void main(String[] args) {
         // Najprostszy sposób w Javie, aby pobrać dane z adresu URL, to użyć klasy URL.
         try {
-            URL url = new URL("http://localhost:8080/PC35-RestSerwer/products.json");
+            URL url = new URL("http://localhost:8080/PC27-RestSerwer/api/products.json/1");
             System.out.println("Odczytuję dane...");
             try (InputStream input = url.openStream()) {
                 // teraz z inputa możemy czytać ciąg bajtów

PC28-RestKlient/src/main/java/rest_klient/Klient02_URL_JSON.java

@@ -4,25 +4,26 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 
-import jakarta.json.Json;
-import jakarta.json.JsonArray;
-import jakarta.json.JsonReader;
-import jakarta.json.JsonValue;
+import jakarta.json.*;
 
 public class Klient02_URL_JSON {
-
+    /* W tej wersji pobieramy dane JSON podstawowym sposobem URL, ale pobrane dane parsujemy za pomocą narzędzi
+       z biblioteki Jakarta JSON P - w tym projekcie dostępnej dzięki zależności eclipse parsson.
+     */
     public static void main(String[] args) {
         try {
             URL url = new URL(Ustawienia.ADRES_USLUGI + "/products.json");
             try(InputStream inputStream = url.openStream();
                 JsonReader reader = Json.createReader(inputStream)) {
+                // pierwszym znakiem w odpowiedzi jest nawias kwadratowy, czyli należy wczytać tablicę jsonową
                 JsonArray array = reader.readArray();
                 // System.out.println(array);
                 for(JsonValue jsonValue : array) {
                     //System.out.println(jsonValue);
-                    System.out.println(jsonValue.asJsonObject().getString("productName"));
-                    System.out.println("    opis: " + jsonValue.asJsonObject().getString("description", ""));
-                    System.out.println("    cena: " + jsonValue.asJsonObject().getJsonNumber("price").bigDecimalValue());
+                    JsonObject jsonObject = jsonValue.asJsonObject();
+                    System.out.println(jsonObject.getString("productName"));
+                    System.out.println("    opis: " + jsonObject.getString("description", ""));
+                    System.out.println("    cena: " + jsonObject.getJsonNumber("price").bigDecimalValue());
                 }
             }
         } catch (IOException e) {

PC28-RestKlient/src/main/java/rest_klient/Klient03_HttpClient.java

@@ -19,8 +19,7 @@ public class Klient03_HttpClient {
      */
 
     public static void main(String[] args) {
-        HttpClient httpClient = HttpClient.newHttpClient();
-        try {
+        try(HttpClient httpClient = HttpClient.newHttpClient()) {
             URI uri = new URI(Ustawienia.ADRES_USLUGI + "/products.json");
             HttpRequest request = HttpRequest.newBuilder(uri).build();
             HttpResponse<Path> response = httpClient.send(request, BodyHandlers.ofFile(Paths.get("wynik03.json")));

PC28-RestKlient/src/main/java/rest_klient/Klient04_HttpClient_String.java

@@ -11,8 +11,7 @@ import java.net.http.HttpResponse.BodyHandlers;
 public class Klient04_HttpClient_String {
 
     public static void main(String[] args) {
-        HttpClient httpClient = HttpClient.newHttpClient();
-        try {
+        try(HttpClient httpClient = HttpClient.newHttpClient()) {
             URI uri = new URI(Ustawienia.ADRES_USLUGI + "/products.json");
             HttpRequest request = HttpRequest.newBuilder(uri).build();
             // Body z odpowiedzi pobierzemy jako obiekt String z całą treścią
@@ -20,7 +19,8 @@ public class Klient04_HttpClient_String {
             System.out.println("response " + response);
             System.out.println("status: " + response.statusCode());
             System.out.println("Content-Type: " + response.headers().firstValue("Content-Type").orElse("BRAK"));
-            System.out.println("Treść odpowiedzi:\n" + response.body()); // tutaj
+            String body = response.body();
+            System.out.println("Treść odpowiedzi:\n" + body);
         } catch (URISyntaxException | IOException | InterruptedException e) {
             e.printStackTrace();
         }

PC28-RestKlient/src/main/java/rest_klient/Klient05_HttpClient_Accept.java

@@ -11,12 +11,11 @@ import java.net.http.HttpResponse.BodyHandlers;
 public class Klient05_HttpClient_Accept {
 
     public static void main(String[] args) {
-        HttpClient httpClient = HttpClient.newHttpClient();
-        try {
+        try(HttpClient httpClient = HttpClient.newHttpClient()) {
             URI uri = new URI(Ustawienia.ADRES_USLUGI + "/products");
             // W tej wersji do zapytania dodajemy nagłówek Accept
             HttpRequest request = HttpRequest.newBuilder(uri)
-                    .header("Accept", "text/plain")
+                    .header("Accept", "text/plain") // albo application/xml, application/json, text/html
                     .build();
             HttpResponse<String> response = httpClient.send(request, BodyHandlers.ofString());
             System.out.println("response " + response);

PC28-RestKlient/src/main/java/rest_klient/Klient06_HttpClient_JSON.java

@@ -22,8 +22,7 @@ public class Klient06_HttpClient_JSON {
      */
 
     public static void main(String[] args) {
-        HttpClient httpClient = HttpClient.newHttpClient();
-        try {
+        try(HttpClient httpClient = HttpClient.newHttpClient()) {
             URI uri = new URI(Ustawienia.ADRES_USLUGI + "/products/1");
             HttpRequest request = HttpRequest.newBuilder(uri)
                     .header("Accept", "application/json")

PC28-RestKlient/src/main/java/rest_klient/Klient07_HttpClient_JSON_Lista.java

@@ -34,14 +34,15 @@ public class Klient07_HttpClient_JSON_Lista {
     }
 
     private static JsonArray pobierzJsona(String adres) throws IOException, InterruptedException, URISyntaxException {
-        HttpClient httpClient = HttpClient.newHttpClient();
-        URI uri = new URI(adres);
-        HttpRequest request = HttpRequest.newBuilder(uri).build();
-        HttpResponse<InputStream> response = httpClient.send(request, BodyHandlers.ofInputStream());
-        System.out.println("response " + response);
-        System.out.println("status: " + response.statusCode());
-        System.out.println("Content-Type: " + response.headers().firstValue("Content-Type").orElse("BRAK"));
-        return wczytajJsona(response.body());
+        try(HttpClient httpClient = HttpClient.newHttpClient()) {
+            URI uri = new URI(adres);
+            HttpRequest request = HttpRequest.newBuilder(uri).build();
+            HttpResponse<InputStream> response = httpClient.send(request, BodyHandlers.ofInputStream());
+            System.out.println("response " + response);
+            System.out.println("status: " + response.statusCode());
+            System.out.println("Content-Type: " + response.headers().firstValue("Content-Type").orElse("BRAK"));
+            return wczytajJsona(response.body());
+        }
     }
 
     private static JsonArray wczytajJsona(InputStream input) {

PC28-RestKlient/src/main/java/rest_klient/Ustawienia.java

 package rest_klient;
 
 public class Ustawienia {
-    public static final String ADRES_USLUGI = "http://localhost:8080/PC27-RestSerwer";
+    public static final String ADRES_USLUGI = "http://localhost:8080/PC27-RestSerwer/api";
 }

PC28-RestKlient/src/main/java/rest_klient/pobierz_produkty.py

+import requests
+
+dane = requests.get("http://localhost:8080/PC27-RestSerwer/api/products.json").json()
+
+print("Liczba elementów", len(dane))
+
+for produkt in dane:
+    print(f'Produckt o nazwie {produkt["productName"]} ma cenę {produkt["price"]}')