Which articles to read for implementing JSON parsing in Java?

Question

Java

Recommend good articles in Russian (more or less from English, but when I read, I don’t understand most of it), which explains how to parse JSON (by URL) in Java. I tried the json.org and gson libraries, but since I have little experience, I meet errors, or I just don’t know how instead of Object obj = parser.parse(new FileReader("c:\test.json")); make it parse from the URL. The option Object obj = parser.parse(new URL("url here"); doesn't work.

Answer 1

Flies separately, cutlets separately. First, download the data to a variable/file using the URL, then parse this data. Your json parser doesn't have to care where the data comes from - it has to parse it. When working with the url, don't forget about asynchrony.

Answer 2

Url is not yet a set stream. This is how it can work:

URL exampleUrl = new URL("example.com");
BufferedReader bufferReader = new BufferedReader( new InputStreamReader(exampleUrl.openStream()));
JsonParser parser = Json.createParser(bufferReader);

Answer 3

This is where the JSON is parsed.
www.androidhive.info/2012/05/how-to-connect-androi...
The code of the parser itself is produced at the very bottom.
To get a
List object params = new ArrayList(); // list of parameters, such as password and login
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
To get a nested object product = json.getJSONObject()
To get a property of an object product.getInt("property name") or product.getString("property name")