package app.works;import org.json.JSONObject;import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.List;import java.util.Map;/** * 获取token类 */public class AiToken {    /**     * 获取权限token     * @return 返回示例：     * {     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",     * "expires_in": 2592000     * }     */        public static void main(String[] args) {        String auth = getAuth();        System.out.println(auth);    }    public static String getAuth() {        // 官网获取的 API Key 更新为你注册的        String clientId = "heO94Px2341AyEhOn0lFFE0jTa2L";        // 官网获取的 Secret Key 更新为你注册的        String clientSecret = "AfNPCBR7Lf522afaVIBaM2eHboPa3QIRkSCm8y ";        return getAuth(clientId, clientSecret);    }    /**     * 获取API访问token     * 该token有一定的有效期，需要自行管理，当失效时需重新获取.     * @param ak - 百度云官网获取的 API Key     * @param sk - 百度云官网获取的 Securet Key     * @return assess_token 示例：     * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"     */    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
     
      > 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);            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;    }}