Spring Boot笔记-使用RestTemplate优雅的调用百度ORC接口

曾经终败给现在 2022-12-09 11:54 123阅读 0赞

这里ORC是干嘛的就不说了。

要识别的图片如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70][]

Java关键源码如下：

@Service
    public class TestServer {
    
        @Autowired
        private RestTemplate restTemplate;
    
        private static String grantType = "client_credentials";
        private static String clientId = "it1995it1995it1995it1995it1995it1995";
        private static String clientSecret = "it1995it1995it1995it1995it1995it1995";
    
        protected String readFileWithBase64(String fileName){
    
            String ret = null;
    
            try{
    
                File file = new File(fileName);
                Long fileLength = file.length();
                byte[] fileContent = new byte[fileLength.intValue()];
    
                FileInputStream in = new FileInputStream(file);
                in.read(fileContent);
                in.close();
    
                //进行Base64编码
                ret = Base64.getEncoder().encodeToString(fileContent);
            }
            catch (IOException e){
    
                e.printStackTrace();
            }
    
            return ret;
        }
    
        public void test(){
    
            //获取access_token
            String accessUrl = "https://aip.baidubce.com/oauth/2.0/token?grant_type=%0&client_id=%1&client_secret=%2";
            accessUrl = accessUrl.replace("%0", grantType).replace("%1", clientId).replace("%2", clientSecret);
    
            ResponseEntity<String> forEntity = restTemplate.getForEntity(accessUrl, String.class);
            Map<String, String> tokenRetMap = JSON.parseObject(forEntity.getBody(), Map.class);
            if(!tokenRetMap.containsKey("access_token")){
    
                System.out.println("ERROR:" + forEntity.getBody());
                return;
            }
    
            String access_token = tokenRetMap.get("access_token");
    
            //读取图片
            String fileContent = readFileWithBase64("C:\\Users\\Administrator\\Desktop\\test\\1.jpg");
    
            //构造参数
            String orcUrl = "https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic?access_token=%0";
            orcUrl = orcUrl.replace("%0", access_token);
            HttpHeaders headers = new HttpHeaders();
            headers.add("Content-Type", "application/x-www-form-urlencoded");
    
            MultiValueMap<String, Object> paraMap = new LinkedMultiValueMap<>();
            paraMap.put("image", Collections.singletonList(fileContent));
    
            String orcRet = restTemplate.postForObject(orcUrl, new HttpEntity<>(paraMap, headers), String.class);
            System.out.println(orcRet);
    
    
            System.out.println("over");
        }
    }

程序运行截图如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70]: /images/20221123/cfba5ded178b4be185b9bf7e88a28dda.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxNzg0NDI3NjE_size_16_color_FFFFFF_t_70 1]: /images/20221123/98180e1d6a884a34872953d87a4e59b4.png