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7 Commits
60a6389de1 ... main

Author SHA1 Message Date
Jan Bertram
76d2662a2f adds similar functionality in python… 2024-04-21 00:28:13 +02:00
Jan Bertram
1939cd990e cleans unused print-statement 2024-04-20 23:57:32 +02:00
Jan Bertram
120859a8d2 adds xml for json libraries, but not the libraries 2024-04-20 23:53:12 +02:00
Jan Bertram
c9e7483665 adds json libraries, chaotic TryOut but works 2024-04-20 23:51:13 +02:00
Jan Bertram
758228098f fixes gitignore 2024-04-20 18:45:49 +02:00
Jan Bertram
15eb3d346c fixes unnecessare toString 2024-04-20 18:44:55 +02:00
Jan Bertram
f98a13c3d1 adds File Helper, project files and gitignore 2024-04-20 18:43:55 +02:00
14 changed files with 309 additions and 0 deletions
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.gitignore vendored Normal file
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out/
lib/

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.idea/.gitignore generated vendored Normal file
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# Default ignored files
/shelf/
/workspace.xml

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.idea/howtodata.iml generated Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$">
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.idea/libraries/glassfish_javax_json.xml generated Normal file
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<component name="libraryTable">
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<properties maven-id="org.glassfish:javax.json:1.1.4" />
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<JAVADOC />
<SOURCES />
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.idea/libraries/javax_json_api.xml generated Normal file
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<component name="libraryTable">
<library name="javax.json.api" type="repository">
<properties maven-id="javax.json:javax.json-api:1.1.4" />
<CLASSES>
<root url="jar://$PROJECT_DIR$/lib/javax.json-api-1.1.4.jar!/" />
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<JAVADOC />
<SOURCES />
</library>
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectRootManager" version="2" project-jdk-name="openjdk-22" project-jdk-type="JavaSDK">
<output url="file://$PROJECT_DIR$/out" />
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<?xml version="1.0" encoding="UTF-8"?>
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<module fileurl="file://$PROJECT_DIR$/.idea/howtodata.iml" filepath="$PROJECT_DIR$/.idea/howtodata.iml" />
</modules>
</component>
</project>

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<?xml version="1.0" encoding="UTF-8"?>
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<mapping directory="" vcs="Git" />
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java_src/Address.java Normal file
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package java_src;
public record Address(String street,
String number,
String city) { }

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java_src/FileHelper.java Normal file
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package java_src;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
public class FileHelper {
public static String readJson(Path path) throws IOException {
StringBuilder jsonString = new StringBuilder();
for (String line : Files.readAllLines(path)) {
jsonString.append(line);
}
return jsonString.toString();
}
}

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java_src/Person.java Normal file
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package java_src;
import java.util.ArrayList;
public record Person(String name,
int age,
String email,
Address address,
ArrayList<String> hobbies,
ArrayList<String> friends) { }

58
java_src/TryOut.java Normal file
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package java_src;
import javax.json.*;
import java.io.IOException;
import java.io.StringReader;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
public class TryOut {
public static void main(String[] args) {
String jsonString;
try {
// Path path = Paths.get("/home/jan/git-projekte/howtodata/JSON/alice.json"); // Absoluter Pfad
Path path = Paths.get("JSON/alice.json"); // Besser: relativer Pfad
jsonString = FileHelper.readJson(path);
System.out.println("Aus Datei eingelesener Json-String:");
System.out.println(jsonString);
} catch (IOException e) {
System.err.println(e);
jsonString = "{}";
}
JsonReader jsonReader = Json.createReader(new StringReader(jsonString));
JsonObject ali = jsonReader.readObject();
jsonReader.close();
System.out.println("In JsonObject verwandelt:");
System.out.println(ali.toString());
System.out.println("Aus JsonObject erzeugtes Java-Record:");
Person a1 = aliceAutomatically(ali);
System.out.println(a1);
}
private static Person aliceAutomatically(JsonObject ali) {
ArrayList<String> hob = new ArrayList<>();
for (JsonValue hobby : ali.getJsonArray("hobbies")) {
JsonString jsonhobby = (JsonString) hobby;
hob.add(jsonhobby.getString());
}
ArrayList<String> fri = new ArrayList<>();
for (JsonValue friend : ali.getJsonArray("friends")) {
JsonString jsonFriend = (JsonString) friend;
fri.add(jsonFriend.getString());
}
JsonObject jasonAddr = ali.getJsonObject("address");
Address javaAddr = new Address(jasonAddr.getString("street"),
jasonAddr.getString("number"),
jasonAddr.getString("city"));
Person aliAuto = new Person(ali.getString("name"),
ali.getInt("age"),
ali.getString("email"),
javaAddr,
hob,
fri);
return aliAuto;
}
}

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python_src/try_out.py Normal file
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import json
class Address:
def __init__(self, street, number, city):
self.street = street
self.number = number
self.city = city
class Person:
def __init__(self, name, age, email, address, hobbies, friends):
self.name = name
self.age = age
self.email = email
self.address = address
self.hobbies = hobbies
self.friends = friends
def __str__(self):
return self.name + ', ' + str(self.age) + ', ' + self.email
file = open('../JSON/alice.json')
json_person = json.load(file)
file.close()
json_address = json_person['address']
python_address = Address(json_address['street'], json_address['number'], json_address['city'])
python_person = Person(json_person['name'],
json_person['age'],
json_person['email'],
python_address,
json_person['hobbies'],
json_person['friends'])
print(python_person)
print('Friends with: ')
for friend in python_person.friends:
print(friend)