10月21日总结

public static String getAuth(String ak, String sk) {
    // 获取token地址
    String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
    String getAccessTokenUrl = authHost
            // 1. grant_type为固定参数
            + "grant_type=client_credentials"
            // 2. 官网获取的 API Key
            + "&client_id=" + ak
            // 3. 官网获取的 Secret Key
            + "&client_secret=" + sk;
    try {
        URL realUrl = new URL(getAccessTokenUrl);
        // 打开和URL之间的连接
        HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
        connection.setRequestMethod("GET");
        connection.connect();
        // 获取所有响应头字段
        Map<String, List<String>> map = connection.getHeaderFields();
        // 遍历所有的响应头字段
        for (String key : map.keySet()) {
            System.err.println(key + "--->" + map.get(key));
        }
        // 定义 BufferedReader输入流来读取URL的响应
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String result = "";
        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
        /**
         * 返回结果示例
         */
        System.err.println("result:" + result);
        //JSONObject jsonObject = new JSONObject(result);
        JSONObject jsonObject=JSON.parseObject(result);
        String access_token = jsonObject.getString("access_token");
        return access_token;
    } catch (Exception e) {
        System.err.printf("获取token失败！");
        e.printStackTrace(System.err);
    }
    return null;
}