Question

CLASS：

   //@JsonIgnoreProperties(ignoreUnknown = true)
  public class Image (with and without this one--->> implements java.io.Serializable)
   {
            @Id   
            private String id;
            private String userId;                 
            private  byte[] image;
            private String extension;
            private String text;
  //getters & setters and //Generate to string()      

    public Image() {  }         
    public Image( String id, String userId, byte[] image, String extension, String text)  
    {           
            this.id = id;
            this.userId = userId;
            this.image = image;
            this.extension = extension;
            this.text = text;   }      }

控制器：

@RequestMapping(value = "ocr/v1/upload", method = RequestMethod.POST,consumes= MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
        public Status doOcr( @RequestBody Map<String, Image> image ) throws Exception {
try {
  ByteArrayInputStream bis = new ByteArrayInputStream(Base64.decodeBase64(((Image) image).getImage()));
               Tesseract tesseract = new Tesseract(); // JNA Interface Mapping
                String imageText = tesseract.doOCR(ImageIO.read(bis));
                ((Image) image).setText(imageText);   
                repository.save(image);
                LOGGER.debug("OCR Result = " + imageText);
            } catch (Exception e) {
                LOGGER.error("TessearctException while converting/uploading image: ", e);
                throw new TesseractException();
            }
            return new Status("success");       }

     @RequestMapping(value = "ocr/v1/images/users/{userId}", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
            public List<Image> getUserImages(@PathVariable String userId) throws Exception {
                List<Image> userImages = new ArrayList<>();
                try {
                    userImages = repository.findByUserId(userId);
                } catch (Exception e) {
                    LOGGER.error("Exception occurred finding image for userId: {} ", userId, e);
                    throw new Exception();
                }            return userImages;        }

测试案例：

@Test
    public void testDoOcr() throws IOException {
        Map<String, String> headers = new HashMap<String, String>();
        headers.put("Accept", MediaType.APPLICATION_JSON_VALUE);
        headers.put("Content-Type", MediaType.APPLICATION_JSON_VALUE);
        Image image = new Image();
        InputStream inputStream = ClassLoader.getSystemResourceAsStream("eurotext.png");
        image.setUserId("arun0009");
        image.setExtension(".png");
        image.setImage(Base64.encodeBase64(IOUtils.toByteArray(inputStream)));
        String response = given().contentType("application/json").headers(headers).body(image).when().post("http://localhost:8080/ocr/v1/upload").then()
            .statusCode(200).extract().response().body().asString();
        System.out.println(response);
    }

JSON1 [JSON解析错误：无法构造``的实例（尽管至少存在一个创建者）]

{ 
    "userId": "arun0009",
    "extension": ".png",
    "text" : null,
    "image" : "ENCODE DETAILS OF IMAGe"
}

JSON2 [JSON解析错误：无法反序列化START_ARRAY令牌中的“”实例； ]

{ "image" : [ {
    "userId": "arun0009",
    "extension": ".png",
    "text" : null,
    "image" : "ENCODE DETAILS OF IMAGe"
}]}

大家好，我无法解决此错误。我试图通过邮递员发布此详细信息，但出现此错误。我被应用了很多堆栈溢出建议，例如添加json依赖项，并尝试使用不同的json格式，实现java.io.Serializable，添加@ JsonDeserialize，objectMapper。和许多解决方案。

没有任何帮助我解决此错误。虽然打json格式1时出现错误“无法构造``（尽管至少存在一个Creator的实例）”，但在使用第二个json格式时却显示为上述错误。谁能帮我解决这个问题？？

来源：https://github.com/arun0009/ocr-tess4j-rest

IMAGE

IMAGE@

预先感谢朋友。

无法构造“包”的实例（尽管存在至少一个Creator）：没有用于反序列化的String-argument构造函数方法

0 个答案: