工具類-----Java實現HTTPS請求

1.Util類

public class HttpsUtils {
    private static Logger log = LogManager.getLogger(HttpsUtils.class);

    /**
     * 發起https請求並獲取結果
     *
     * @param requestUrl 請求地址
     * @param requestMethod 請求方式（GET、post）
     * @param outputStr 提交的數據
     * @return json字符串
     */
    public static JSONObject request(String requestUrl, String requestMethod, String outputStr) {
        StringBuffer buffer = new StringBuffer();
        JSONObject jsonObject ;
        try {
            // 創建SSLContext對象，並使用我們制定的信任管理器初始化
            TrustManager[] tm = { new MyX509TrustManager() };
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new java.security.SecureRandom());
            // 從上述SSLContext對象中得到SSLSocketFactory對象
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
            httpUrlConn.setSSLSocketFactory(ssf);

            httpUrlConn.setDoOutput(true);
            httpUrlConn.setDoInput(true);
            httpUrlConn.setUseCaches(false);
            // 設置請求方式（GET/POST）
            httpUrlConn.setRequestMethod(requestMethod);

            if ("GET".equalsIgnoreCase(requestMethod)) {
                httpUrlConn.connect();
            }

            // 當有數據需要提交時
            if (null != outputStr) {
                OutputStream outputStream = httpUrlConn.getOutputStream();
                // 注意編碼格式，防止中文亂碼
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }

            // 將返回的輸入流轉換成字符串
            InputStream inputStream = httpUrlConn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String str = null;
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }
            bufferedReader.close();
            inputStreamReader.close();
            // 釋放資源
            inputStream.close();
            httpUrlConn.disconnect();
            log.debug("https buffer:" + buffer.toString());
        } catch (ConnectException ce) {
            log.error("server connection timed out");
        } catch (Exception e) {
            log.error( e.getMessage());
        }
        jsonObject = JSON.parseObject(buffer.toString());
        return jsonObject;
    }

    /**
     * 證書信任管理器（用於https請求）
     */
    static class MyX509TrustManager implements X509TrustManager {

        @Override
        public void checkClientTrusted(X509Certificate[] x509Certificates, String s) {

        }

        @Override
        public void checkServerTrusted(X509Certificate[] x509Certificates, String s) {

        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }
    }

}

2、關鍵代碼示例

 JSONObject jsonObject =  HttpsUtil.request(url, "GET", null);