首先要满足的条件，已注册华为云账户，并订阅华为云上的文字识别接口，以下以订阅的身份证识别接口为例
package OCRDemo; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; /** * @author abang * @date 2020/7/3 0003 20:59 */ public class GetOCR { public static void main(String[] args) throws IOException { //请求的region String region = "cn-north-4"; //用户名 String username = "xxxxxx"; //用户密码 String password = "xxxxxx"; //账户名 String userName = "xxxxxx"; //请求的uri接口 String uri = "/v1.0/ocr/id-card"; //传入image或uri的json字符串(图片为公网的地址，可查询) String param = "{\"url\":\"http://photocdn.sohu.com/20101021/Img276166786.jpg\"}"; //获取用token String token = getToken(region,username,password,userName); //返回请求的图片文字信息 System.out.println(getIdCard(region,token,param,uri)); } //获取请求链接中用户的token信息 public static String getToken(String region,String username,String password,String userName) throws IOException { String iam = "https://iam."+region+".myhuaweicloud.com/v3/auth/tokens"; String param = "{\"auth\":{\"identity\":{\"methods\":[\"password\"],\"password\":{\"user\":{\"name\":\"" + username + "\",\"password\":\"" + password + "\",\"domain\":{\"name\":\"" + userName + "\"}}}},\"scope\":{\"project\":{\"name\":\"cn-north-4\"}}}}"; PrintWriter out; BufferedReader in = null; String token = ""; String response = ""; try { //需要请求的url URL url = new URL(iam); //打开和URL之间的连接 URLConnection connection = url.openConnection(); //设置通用的请求属性，请求头部分 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0"); // 发送POST请求必须设置如下两行 connection.setDoInput(true); connection.setDoOutput(true); // 建立实际的连接 connection.connect(); ///获取URLConnection对象对应的输出流 out = new PrintWriter(connection.getOutputStream()); //发送请求参数 out.write(param); //flush输出流的缓冲 out.flush(); //获取相应头中的token信息 token = connection.getHeaderField("X-Subject-Token"); //定义BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader(connection.getInputStream())); String line; while ((line = in.readLine()) != null) { //换行打印获取结果 response += "\n" + line; } // 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()) { //打印出相应头中的信息 //System.out.println(key + "--->" + map.get(key)); } } catch (Exception e) { System.out.println("发送GET请求出现异常！" + e); e.printStackTrace(); } // 使用finally块来关闭输入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } //返回所要用到的token信息 return token; } //请求云上接口，调用接口服务 public static String getIdCard(String region,String token,String param,String uri) throws IOException { String ocr = "https://ocr."+region+".myhuaweicloud.com"+uri; String response = ""; BufferedReader in = null; try { URL url = new URL(ocr); URLConnection connection = url.openConnection(); //容易载跟头，表明请求体的部分为json形式 connection.setRequestProperty("Content-Type", "application/json"); connection.setRequestProperty("X-Auth-Token", token); connection.setDoOutput(true); connection.setDoInput(true); connection.connect(); PrintWriter out = new PrintWriter(connection.getOutputStream()); out.write(param); out.flush(); in = new BufferedReader(new InputStreamReader(connection.getInputStream())); String line; while ((line = in.readLine()) != null) { response += "\n" + line; } } catch (Exception e) { System.out.println("发送GET请求出现异常！" + e); e.printStackTrace(); } // 使用finally块来关闭输入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } //返回相应体中的结果，打印出来 return response; } }返回成功
