获取文件二进制

/**
 * 获取文件二进制
 *
 * @param imgUrl 文件地址
 * @return
 * @throws Exception
 */
private byte[] getFileByte(String imgUrl) throws Exception {
    InputStream inStream = null;
    ByteArrayOutputStream outStream = null;
    HttpURLConnection con;
    try {
        trustAllHosts();
        URL url = new URL(imgUrl);
        if ("https".equals(url.getProtocol().toLowerCase())) {
            HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
            https.setHostnameVerifier(DO_NOT_VERIFY);
            con = https;
        } else {
            con = (HttpURLConnection) url.openConnection();
        }
        con.setRequestMethod("GET");
        con.setConnectTimeout(4 * 1000);
        //通过输入流获取图片数据
        inStream = con.getInputStream();
        outStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[2048];
        int len = 0;
        while ((len = inStream.read(buffer)) != -1) {
            outStream.write(buffer, 0, len);
        }
        return outStream.toByteArray();
    } catch (Exception e) {
        log.error(String.format("==> 获取文件二进制数组失败，文件地址：%s", imgUrl), e);
        return null;
    } finally {
        if (inStream != null) {
            inStream.close();
        }
        if (outStream != null) {
            outStream.close();
        }
    }
}

/**
 * 信任所有
 *
 * @date 2019-09-30 上午 11:07
 */
private void trustAllHosts() {
    // Create a trust manager that does not validate certificate chains
    TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
        @Override
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return new java.security.cert.X509Certificate[]{};
        }

        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) {
        }
    }};
    // Install the all-trusting trust manager
    try {
        SSLContext sc = SSLContext.getInstance("TLS");
        sc.init(null, trustAllCerts, new java.security.SecureRandom());
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private final HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {
    @Override
    public boolean verify(String hostname, SSLSession session) {
        return true;
    }
};