60 lines
2.1 KiB
Java
60 lines
2.1 KiB
Java
package java_src;
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import javax.json.*;
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import java.io.IOException;
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import java.io.StringReader;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.ArrayList;
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public class TryOut {
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public static void main(String[] args) {
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String jsonString;
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try {
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// Path path = Paths.get("/home/jan/git-projekte/howtodata/JSON/alice.json"); // Absoluter Pfad
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Path path = Paths.get("JSON/alice.json"); // Besser: relativer Pfad
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jsonString = FileHelper.readJson(path);
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System.out.println("Aus Datei eingelesener Json-String:");
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System.out.println(jsonString);
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} catch (IOException e) {
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System.err.println(e);
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jsonString = "{}";
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}
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JsonReader jsonReader = Json.createReader(new StringReader(jsonString));
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JsonObject ali = jsonReader.readObject();
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jsonReader.close();
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System.out.println("In JsonObject verwandelt:");
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System.out.println(ali.toString());
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System.out.println("Aus JsonObject erzeugtes Java-Record:");
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Person a1 = aliceAutomatically(ali);
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System.out.println(a1);
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System.out.println("Manuell erzeugtes Java-Record:");
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}
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private static Person aliceAutomatically(JsonObject ali) {
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ArrayList<String> hob = new ArrayList<>();
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for (JsonValue hobby : ali.getJsonArray("hobbies")) {
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JsonString jsonhobby = (JsonString) hobby;
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hob.add(jsonhobby.getString());
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}
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ArrayList<String> fri = new ArrayList<>();
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for (JsonValue friend : ali.getJsonArray("friends")) {
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JsonString jsonFriend = (JsonString) friend;
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fri.add(jsonFriend.getString());
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}
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JsonObject jasonAddr = ali.getJsonObject("address");
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Address javaAddr = new Address(jasonAddr.getString("street"),
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jasonAddr.getString("number"),
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jasonAddr.getString("city"));
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Person aliAuto = new Person(ali.getString("name"),
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ali.getInt("age"),
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ali.getString("email"),
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javaAddr,
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hob,
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fri);
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return aliAuto;
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}
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}
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