Created
June 22, 2022 07:22
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お天気アプリ
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| package org.example; | |
| import org.json.JSONObject; | |
| import java.io.*; | |
| import java.net.HttpURLConnection; | |
| import java.net.MalformedURLException; | |
| import java.net.URL; | |
| import java.nio.charset.StandardCharsets; | |
| public class Main { | |
| private static String inputStream2String(InputStream stream) { | |
| String result = ""; | |
| StringBuilder sb = new StringBuilder(); | |
| try { | |
| BufferedReader reader = new BufferedReader(new InputStreamReader(stream, StandardCharsets.UTF_8)); | |
| String line = reader.readLine(); | |
| while (line != null) { | |
| sb.append(line); | |
| line = reader.readLine(); | |
| } | |
| reader.close(); | |
| result = sb.toString(); | |
| } catch (UnsupportedEncodingException e) { | |
| throw new RuntimeException(e); | |
| } catch (IOException e) { | |
| throw new RuntimeException(e); | |
| } | |
| return result; | |
| } | |
| public static void main(String[] args) { | |
| String response = ""; | |
| String url = "https://api.openweathermap.org/data/2.5/weather?q=Osaka&lang=ja&units=metric&appid=fcb3f4b5b7a06bc9d509d4c4fdfa5e89"; | |
| try { | |
| URL urlObject = new URL(url); | |
| HttpURLConnection connection = (HttpURLConnection) urlObject.openConnection(); | |
| connection.setConnectTimeout(1000); | |
| connection.setReadTimeout(1000); | |
| connection.setRequestMethod("GET"); | |
| connection.connect(); | |
| InputStream stream = connection.getInputStream(); | |
| response = inputStream2String(stream); | |
| stream.close(); | |
| connection.disconnect(); | |
| } catch (MalformedURLException e) { | |
| throw new RuntimeException(e); | |
| } catch (IOException e) { | |
| throw new RuntimeException(e); | |
| } | |
| JSONObject json = new JSONObject(response); | |
| String cityName = json.getString("name"); | |
| System.out.println(cityName + "の天気"); | |
| JSONObject weather = json.getJSONArray("weather").getJSONObject(0); | |
| System.out.println("天気は" + weather.getString("description")); | |
| Double temperature = json.getJSONObject("main").getDouble("temp"); | |
| System.out.println("気温は" + temperature); | |
| /** | |
| * 大阪市の天気 | |
| * 天気は曇りがち | |
| * 気温は29.1 | |
| */ | |
| } | |
| } |
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