我实际上正在开发一个小应用程序来训练,我在使用
SpringHateoas使用PathVariable时遇到了问题.
事实上,当我使用类似的东西：
@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;
}
我有一个像下面这样的错误：
[com.sun.istack.internal.SAXException2]: unable to marshal type DirectoryDTO
to element because it’s missing an annotation
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 ？
解决方法
您必须在DirectoryDTO中添加@XmlRootElement(name =“directoryEntity”)的注释.
