Spring Boot：上传文件时出错

Question

使用 spring-boot 我试图发布图像，但我得到了

org.thymeleaf.exceptions.TemplateInputException

实体类

@Entity
@Table(name="image")
public class ImageEntity {

@Id
@Column(name="imageId")
private String imageId;

@Column(name="imageName")
private String imageName;

@Column(name="type")
private String type;

/*@Column(name="size")
private long size;*/

@Column(name="imagepath")
private String path;

public ImageEntity(String imageName, String type,  String path) {
    super();
    this.imageName = imageName;
    this.type = type;
    //this.size = size;
    this.path = path;
}

控制器类

   @Controller
   public class ImgContr {
    public static final Logger logger =LoggerFactory.getLogger(ImgContr.class);

@Autowired
public ImgService imgService;


@PostMapping("/addImage")
public ImageEntity saveImage(@RequestBody ImageEntity imgent, RedirectAttributes redirectAttributes) throws Exception 
{
return imgService.saveImage(imgent );
}

域服务

@Service
public class ImgService {

@Autowired
public ImageDao imageDao;


public ImageEntity saveImage(ImageEntity imgent) {
    ImageEntity imgEngDom=new ImageEntity();
    imgEngDom.setImageId(imgent.getImageId());
    imgEngDom.setImageName( imgent.getImageName());
    imgEngDom.setPath(imgent.getPath());
    //imgEngDom.setSize(imgent.getSize());
    imgEngDom.setType(imgent.getType());

    return imageDao.saveImage(imgEngDom);

}

ImageDAO.java

@Repository
public class ImageDao {

@PersistenceContext
private EntityManager entityManager;

@Autowired
SessionFactory sessionFactory;

public ImageEntity saveImage(ImageEntity imgEngDom) {

        Session session = null;

        try {
            session = sessionFactory.openSession();
            session.beginTransaction();
            session.save(imgEngDom);

            session.getTransaction().commit();
        } catch (Exception e) {
            session.getTransaction().rollback();


        } finally {
            session.close();
        }
        return imgEngDom;

}

负载请求。

  {
    "imageName": "Divya",
    "type" : "jpg",
    "path": " C:/Users/admin/Desktop"
  }

//如果我尝试在邮递员中发布这样的图像，我得到了错误

错误

{

  "timestamp": 1548408353973,
  "status": 500,
  "error": "Internal Server Error",
  "exception": "org.thymeleaf.exceptions.TemplateInputException",
  "message": "Error resolving template \"addImage\", template might not 
  exist or might not be accessible by any of the configured Template 
  Resolvers",
  "path": "/addImage"

}

我是springboot 的新手，我错了。帮帮我。

Answer 1

我认为你的控制器配置有问题。

试试这个

@RestController
public class ImgContr {

而不是

@Controller
public class ImgContr {

更多详细内容请关注>>Controller vs RestController

注意：当您需要 json 响应而不是 Spring-mvc 项目的解决方案时，上述解决方案有效。