我正在使用spring创建一个宁静的api，到目前为止，我的问题是如何动态建模响应的字段？
那就是我正在使用的控制器：
@Controller
public class AlbumController {
@Autowired
private MusicService musicService;
@RequestMapping(value = "/albums", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Collection> getAllAlbums() {
Collection albums = musicService.getAllAlbums();
List> resources = new ArrayList>();
for (Album album : albums) {
resources.add(this.getAlbumResource(album));
}
return resources;
}
@RequestMapping(value = "/album/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Resource getAlbum(@PathVariable(value = "id") String id) {
Album album = musicService.getAlbum(id);
return getAlbumResource(album);
}
private Resource getAlbumResource(Album album) {
Resource resource = new Resource(album);
// Link to Album
resource.add(linkTo(methodOn(AlbumController.class).getAlbum(album.getId())).withSelfRel());
// Link to Artist
resource.add(linkTo(methodOn(ArtistController.class).getArtist(album.getArtist().getId())).withRel("artist"));
// Option to purchase Album
if (album.getStockLevel() > 0) {
resource.add(linkTo(methodOn(AlbumController.class).purchaseAlbum(album.getId())).withRel("album.purchase"));
}
return resource;
}
@RequestMapping(value = "/album/purchase/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public Resource purchaseAlbum(@PathVariable(value = "id") String id) {
Album a = musicService.getAlbum(id);
a.setStockLevel(a.getStockLevel() - 1);
Resource resource = new Resource(a);
resource.add(linkTo(methodOn(AlbumController.class).getAlbum(id)).withSelfRel());
return resource;
}
}
和模型：
public class Album {
private final String id;
private final String title;
private final Artist artist;
private int stockLevel;
public Album(final String id, final String title, final Artist artist, int stockLevel) {
this.id = id;
this.title = title;
this.artist = artist;
this.stockLevel = stockLevel;
}
public String getId() {
return id;
}
public String getTitle() {
return title;
}
public Artist getArtist() {
return artist;
}
public int getStockLevel() {
return stockLevel;
}
public void setStockLevel(int stockLevel) {
this.stockLevel = stockLevel;
}
}
转播
