java 手写文字图片识别提取百度API

约定不等于承诺〃 2023-01-09 14:27 157阅读 0赞

package org.fh.util;
    
    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;
    
    /**
     * 说明：获取文字识别token类
     * from：www.fhadmin.org
     */
    public class AuthTextService {
    
        /**
         * 获取权限token
         * @return 返回示例：
         * {
         * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
         * "expires_in": 2592000
         * }
         */
        public static String getAuth() {
            // 官网获取的 API Key 更新为你注册的
            String clientId = "xxxxx;
            // 官网获取的 Secret Key 更新为你注册的
            String clientSecret = "xxxxx";
            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<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);
                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;
        }
    
    }

package org.fh.util;
    
    import java.net.URLEncoder;
    
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    
    /**
     * 说明：手写文字识别
     * from：www.fhadmin.org
     */
    public class Handwriting {
    
        /**
         * @param imgBase64Str
         * @param accessToken
         * @return
         */
        public static String handwriting(String imgBase64Str, String accessToken) {
        	
            String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/handwriting";	 //请求url
            try {
                String imgParam = URLEncoder.encode(imgBase64Str, "UTF-8");
                String param = "image=" + imgParam;
                String result = HttpUtil.post(url, accessToken, param);
                JSONObject jsonMsg = JSONObject.fromObject(result);
                int words_result_num = Integer.parseInt(jsonMsg.getString("words_result_num"));	//识别结果数，表示words_result的元素个数
                if(words_result_num > 0) {
                	StringBuffer strb = new StringBuffer();
                	JSONArray jsonArray= jsonMsg.getJSONArray("words_result");
                	for(int i=0;i<jsonArray.size();i++){
                        JSONObject object = jsonArray.getJSONObject(i);
                        String words = object.getString("words");
                        strb.append(words);
                        strb.append("\r\n");
                    }
                	result = strb.toString();
                }else {
                	result = "null";
                }
                return result;
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
            
        }
    
    }