Spring Hateoas，PathVariable和SaxSerialization

Question

我实际上正在开发一个小应用程序来训练，我在使用PathVariable时遇到使用Spring Hateoas的问题。

事实上，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;
    }

我收到如下错误：

  

[com.sun.istack.internal.SAXException2]：无法封送DirectoryDTO类型   元素，因为它缺少注释

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);
    }
}

我做错了什么？

Answer 1

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