how to read a .json from web api java
try {
URL url = new URL("url");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("GET");
conn.connect();
if(conn.getResponseCode() == 200) {
Scanner scan = new Scanner(url.openStream());
while(scan.hasNext()) {
String temp = scan.nextLine();
//parse json here
}
}
}java get json from url
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;
import org.json.JSONException;
import org.json.JSONObject;
public class JsonReader {
private static String readAll(Reader rd) throws IOException {
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
return sb.toString();
}
public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
InputStream is = new URL(url).openStream();
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
String jsonText = readAll(rd);
JSONObject json = new JSONObject(jsonText);
return json;
} finally {
is.close();
}
}
}java get json from url
//include org.json:json as a dependency
try(BufferedReader br=new BufferedReader(new InputStreamReader(new URL("URL here").openStream()))){
JSONObject json=new JSONObject(br.lines().collect(Collectors.joining()));
json.getString("hello");//gets the String of the key named "hello"
json.getInt("world");//gets the integer value of the key named "world"
json.getJSONObject("test");//gets the JSONObject value representation of the key "test", you can use the getXXX methods on the returned object
json.getJSONObject("test").getString("something");
}
/* JSON data:
{
"hello": "some string",
"world": 1234,
"test":{
"something": "else"
}
}
*/Copyright © 2021 Codeinu
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