好多新注册的开发者表示不太清楚如何获取AccessToken。首先还是建议大家看官网文档

http://ai.baidu.com/docs#/Begin/top

小帅帮大家写一个Java调用的示例

首先是创建了应用。并得知APIKEY SECRETKEY

代码准备工作。先下载官网的HTTPUTIL工具类 稍做改动

下载地址:https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3

package com.xiaoshuai.baidu.util;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.List;

import java.util.Map;

/**

* http 工具类

*/

public class HttpUtil {

public static String post(String requestUrl, String accessToken, String params) throws Exception {

String generalUrl = requestUrl + "?access_token=" + accessToken;

URL url = new URL(generalUrl);

// 打开和URL之间的连接

HttpURLConnection connection = (HttpURLConnection) url.openConnection();

connection.setRequestMethod("POST");

// 设置通用的请求属性

connection.setRequestProperty("Content-Type", "application/json");

connection.setRequestProperty("Connection", "Keep-Alive");

connection.setUseCaches(false);

connection.setDoOutput(true);

connection.setDoInput(true);

// 得到请求的输出流对象

DataOutputStream out = new DataOutputStream(connection.getOutputStream());

out.writeBytes(params);

out.flush();

out.close();

// 建立实际的连接

connection.connect();

// 获取所有响应头字段

Map> headers = connection.getHeaderFields();

// 遍历所有的响应头字段

for (String key : headers.keySet()) {

System.out.println(key + "--->" + headers.get(key));

}

// 定义 BufferedReader输入流来读取URL的响应

BufferedReader in = null;

if (requestUrl.contains("nlp"))

in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "GBK"));

else

in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));

String result = "";

String getLine;

while ((getLine = in.readLine()) != null) {

result += getLine;

}

in.close();

System.out.println("result:" + result);

return result;

}

//看这里。是修改过后获取AccessToken的方法。POST/GET都可以

public static String postToken(String requestUrl,String params) throws Exception {

String generalUrl = requestUrl;

URL url = new URL(generalUrl);

// 打开和URL之间的连接

HttpURLConnection connection = (HttpURLConnection) url.openConnection();

connection.setRequestMethod("POST");

// 设置通用的请求属性

connection.setRequestProperty("Content-Type", "application/json");

connection.setRequestProperty("Connection", "Keep-Alive");

connection.setUseCaches(false);

connection.setDoOutput(true);

connection.setDoInput(true);

// 得到请求的输出流对象

DataOutputStream out = new DataOutputStream(connection.getOutputStream());

out.writeBytes(params);

out.flush();

out.close();

// 建立实际的连接

connection.connect();

// 获取所有响应头字段

Map> headers = connection.getHeaderFields();

// 遍历所有的响应头字段

for (String key : headers.keySet()) {

System.out.println(key + "--->" + headers.get(key));

}

// 定义 BufferedReader输入流来读取URL的响应

BufferedReader in = null;

if (requestUrl.contains("nlp"))

in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "GBK"));

else

in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));

String result = "";

String getLine;

while ((getLine = in.readLine()) != null) {

result += getLine;

}

in.close();

System.out.println("result:" + result);

return result;

}

}

直接main函数获取AccessToken

package com.xiaoshuai.baidu.auth;

import com.xiaoshuai.baidu.util.HttpUtil;

/**

* @author 小帅丶

* @类名称 BDToken

* @remark

* @date 2017-11-13

*/

public class BDToken {

/**

* 获取百度AI的AccessToken

* @throws Exception

*/

public static void main(String[] args) throws Exception {

/**

* 应用如何创建URL http://ai.baidu.com/docs#/Begin/top 这里是图文教程的哦。

*/

//在控制台复制自己应用的 API Key

String APIKEY = "";

//在控制台复制自己应用的 Secret Key

String SECRETKEY = "";

String url = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=APIKEY&client_secret=SECRETKEY";

String requsetURL = url.replaceAll("APIKEY",APIKEY).replaceAll("SECRETKEY",SECRETKEY);

System.out.println(requsetURL);

String jsonObject = HttpUtil.postToken(requsetURL,"");

System.err.println(jsonObject);

}

}

替换了相关参数 运行即可

{

"access_token": "24.397e884bd79b47632ad69ee47e0deb5b.2592000.1513130665.282335-10347832",

"session_key": "9mzdCP0Ce6jlSq5BCXG7VNqiTHCFeksfqnGWA1dMDhBxF4PZt4nbnnXv/NWGscOB6nvQFax2s12ziuakwxlxQoxJvo6paw==",

"scope": "public vis-faceverify_faceverify vis-faceattribute_faceattribute vis-faceverify_faceverify_v2 vis-faceverify_faceverify_match_v2 brain_all_scope vis-faceverify_vis-faceverify-detect wise_adapt lebo_resource_base lightservice_public hetu_basic lightcms_map_poi kaidian_kaidian ApsMisTest_Test权限 vis-classify_flower bnstest_fasf",

"refresh_token": "25.59c39518c00811b9f7352625371a1753.315360000.1825898665.282335-10347832",

"session_secret": "b837a61fba5df4f7182336d1b8963b96",

"expires_in": 2592000

}

以上就是Java获取AccessToken的示例 不错记得点赞哦