安泰服务文件上传

Question

My RestPictureServices Class

@Service
@TestProfile
public class RestPictureServices implements SahaPictureServices {

    @Autowired
    private PictureRepository pictureRepository;

    @Autowired
    private DozerBeanMapper mapper;

    @Override
    public Collection<SahaPicture> pictures() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public SahaPicture pictureOfSaha(Long sahaId) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public SahaPicture save(SahaPicture picture) {

        SahaPictureEntity pictureEntity=new SahaPictureEntity();
        mapper.map(picture, pictureEntity);
        pictureRepository.save(pictureEntity);
        SahaPicture savedPicture=new SahaPicture();
        mapper.map(pictureEntity, savedPicture);

        return  savedPicture;
    }

    @Override
    public Boolean delete(Long id) {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public SahaPicture update(Long id, SahaPicture picture) {
        // TODO Auto-generated method stub
        return null;
    }

}

My SahaPictureController class

@JsonRestController
@RequestMapping(path = "/saha/picture")
public class PictureController {

    @Autowired
    @Qualifier("restPictureServices")
    private SahaPictureServices pictureServices;


    @RequestMapping(method = RequestMethod.POST)
    public  SahaPicture singleSave(@RequestBody SahaPicture picture) {
        return pictureServices.save(picture);
    }

}

My PictureSahaRepository interface

 public interface PictureRepository extends CrudRepository<SahaPictureEntity,Long>  {

    }

    My picture Model class

public class SahaPicture {

    private MultipartFile file;
    //getter and setter methods   
}




    This is SahaPictureEntity class

@Entity
@Table(name="SahaPicture")

public class SahaPictureEntity {

    @Id
    @GeneratedValue
    private Long id;


    @Column
    @Lob
    private MultipartFile file;

    //getter and setter methods 

}
My JsonRestController Annotation

@RestController
@RequestMapping(produces = MediaType.APPLICATION_JSON_VALUE)
@Retention(RetentionPolicy.RUNTIME)
public @interface JsonRestController {
}

My Services Interface
public interface SahaPictureServices {


    Collection<SahaPicture> pictures();
    SahaPicture pictureOfSaha(Long sahaId);
    SahaPicture save(SahaPicture picture);
    Boolean delete(Long id);
    SahaPicture update(Long id, SahaPicture picture);
}

My Service Configuration Class using dozer mapping jar.
@Configuration
public class ServiceConfiguration {

    @Bean
    public DozerBeanMapper mapper() {
        return new DozerBeanMapper();
    }
}

如何使用rest full services Spring boot将文件或图像插入数据库。我正在尝试restfull服务以插入文件，但遇到错误

无法读取HTTP消息:org . spring framework . HTTP . converter . httpmessagenoretreadableexception:无法读取文档:数字值中的意外字符('-'(代码45)):减号后应为数字(0-9)，以便在[Source:Java . io . pussbackinputstream @ 21 D5 ad7d；处获得有效的数字值。行:1，列:3]；嵌套异常为com . faster XML . Jackson . core . jsonparseexception:数值中出现意外字符('-'(代码45)):减号后应为数字(0-9)，以便在[Source:Java . io . pushback inputstream @ 21 D5 ad 7d；处获得有效的数值。第1行，第3列]

请求和响应如下图所示。

在此处输入图像描述

Answer 1

您需要创建一个包含MultipartFile参数的REST方法。该对象有一个getBytes（）方法以及一个getInputStream（）方法，您可以使用它来获取数据。然后，您可以创建对象并将其保存到存储库中。

看见https://spring.io/guides/gs/uploading-files/和http://www.concretepage.com/spring-4/spring-4-mvc-single-multiple-file-upload-example-with-tomcat作为如何使用Spring上载文件的良好参考。

以下是如何使用jQuery将文件上传到REST服务的前端示例。

        var token = $("meta[name='_csrf']").attr("content");
        var header = $("meta[name='_csrf_header']").attr("content");
        $.ajax({
            url: "/restapi/requests/replay/upload",
            type: "POST",
            beforeSend: function (request)
            {
                request.setRequestHeader(header,token);
            },
            data: new FormData($("#upload-file-form")[0]),
            enctype: 'multipart/form-data',
            processData: false,
            contentType: false,
            cache: false,
            success: function () {
                // Handle upload success
                addText( "File uploaded successfully.")
            },
            error: function () {
                // Handle upload error
                addText( "File upload error.")
            }
        });

然后下面是Rest控制器的样子：

@RestController
public class ReplayRestController {

@Autowired
private ApplicationContext applicationContext;

@RequestMapping(value="/restapi/requests/replay/upload", method = RequestMethod.POST)
@ResponseBody
public ResponseEntity<?> processUpload(
        @RequestParam("uploadfile") MultipartFile uploadfile,
        @RequestParam("databaseWriteIdUpload") String databaseWriteId,
        @RequestParam("recordsToUse")ReplayUpload.RecordsToUse recordsToUse
) {

    try {
        String fileName = uploadfile.getOriginalFilename();
        if (databaseWriteId == null || "".equals(databaseWriteId)) {
            databaseWriteId = fileName;
        }
        ReplayUpload replayUpload = applicationContext.getBean( ReplayUpload.class );
        replayUpload.process( uploadfile.getInputStream(), databaseWriteId, recordsToUse );
    }
    catch (Exception e) {
        System.out.println(e.getMessage());
        return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
    }

    return new ResponseEntity<>(HttpStatus.OK);    }
}