java - Spring Hateoas，PathVariable和SaxSerialization

我实际上是在开发一些训练应用程序，并且在使用PathVariable的Spring Hateoas时遇到了问题。

实际上，当我使用类似的东西时:

   @RequestMapping(value = "/directories/{idDirectory}", method = RequestMethod.GET)
    public DirectoryDTO findById(@PathVariable String idDirectory) {
        DirectoryEntity directoryEntity = directoryService.findById(idDirectory);
        DirectoryDTO directoryDto = new DirectoryDTO(directoryEntity);
        directoryDto.add(linkTo(methodOn(DirectoryController.class).findById(idDirectory)).withSelfRel());
        return directoryDto;
    }

我遇到类似以下错误:



这是我的DirectoryEntity:

@Document(collection = "directory")
public class DirectoryEntity {

    @Id
    private String id;
    private String name;
    private String path;
    private List<DirectoryEntity> childrenDirectories;
    private DirectoryEntity parentDirectory;
    private List<FileEntity> fileEntities;

/* Get/set omitted */
}

和DTO:

public class DirectoryDTO extends Resource<DirectoryEntity> {


    public DirectoryDTO(DirectoryEntity content, Link... links) {
        super(content, links);
    }

    public DirectoryDTO(DirectoryEntity content, Iterable<Link> links) {
        super(content, links);
    }
}

我究竟做错了什么 ？

最佳答案

您必须在DirectoryDTO中添加@XmlRootElement(name = "directoryEntity")的注释。