Question

我正在尝试理解REST和JAX-RS / JAXB，我与图书馆和书籍之间存在多对多的关系。我想在一个由图书馆拥有的图书上进行GET-POST-PUT-DELETE操作，因此GET的网址是“libraries / {library_id} / books / {book_id}” 我已经用这种方式实现了它：

@Stateless
@Path("libraries")
public class LibraryFacadeREST extends AbstractFacade<Library> {

  ...    

   @Path("{library_id}/booksFacade/")
   public BookFacadeREST getBookFacade() {
     return bookFacadeREST;
    }
  ...
}

@Stateless
@Path("books")
public class BookFacadeREST extends AbstractFacade<Book> {
   ...
    @GET
    @Path("{id}")
    @Produces({"application/xml", "application/json"})
    public Book find(@PathParam("id") Long id, @PathParam("library_id") long libraryId) {

       Book book = super.find(id);

       if (libraryId != -1) {
          Library library = em.find(Library.class, libraryId);

          if (book.getLibraries().contains(library)) {
             return book;
          } else {
             return null;
          }
       }

      return null;
   }
   ...
}

但我不喜欢它，它很糟糕，是否有更好的方法来管理jaxrs中的自有资源？

Answer 1

为什么休息资源需要关系只是因为相关实体有关系？我认为图书资源应该这样：

@Path("libraries/{library_id}/books")
public class BookFacadeREST extends AbstractFacade<Book> {
    @GET
    @Path("{id}")
    @Produces({"application/xml", "application/json"})
    public Book find(@PathParam("id") Long id, @PathParam("library_id") long libraryId) {
       ...
    }
}

JAX-RS中拥有的资源

1 个答案: