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如何从@restcontroller返回@repositoryrestresource样式的响应

spring-hateoas spring-rest spring-restcontroller spring-boot spring

Your Friend Ken · 技术社区 · 8 年前

// /accounts (RepositoryRestResource JSON structure)
{
    _embedded: {
        accounts: []
    },
    _links: {
        first: {},
        self: {},
        next: {},
        last: {},
        profile: {},
        search: {}
    },
    page: {
    size: 20,
    totalElements: 35,
    totalPages: 2,
    number: 0
    }
}

// /my-accounts (RestController JSON structure)
{
    content: [ ... ], // accounts
    pageable: {},
    totalPages: 1,
    totalElements: 2,
    last: true,
    size: 20,
    number: 0,
    sort: {},
    numberOfElements: 2,
    first: true
}

REST存储库:

@RepositoryRestResource(collectionResourceRel = "accounts", path = "accounts", itemResourceRel = "account")
public interface AccountRepository extends PagingAndSortingRepository<Account, Long> {

    @RestResource(path = "owner", rel = "owner")
    Page<Account> findByOwner(@Param("username") String owner,Pageable p);
}

@RestController
public class AccountController {

    private AccountRepository repo;

    @Autowired
    public AccountController(AccountRepository repo) {
        this.repo = repo;
    }

    @RequestMapping(
        path = "/my-accounts",
        method = RequestMethod.GET,
        produces = "application/hal+json")
    public ResponseEntity<Page<Account>> getStatus(
        @RequestParam(value = "page", defaultValue = "0", required = false) int page,
        @RequestParam(value = "size", defaultValue = "20", required = false) int size,
        Authentication authentication) {

        String username =  authentication.getName();

        Page<Account> accounts = repo.findByOwner(username, PageRequest.of(page, size));

        return ResponseEntity.ok(accounts);
    }
}

2 回复 | 直到 8 年前

Danila Kiver 8 年前

how Spring Data REST does it PagedResourcesAssembler Page

PagedResourcesAssembler

public ResponseEntity<PagedResources> getStatus(
    @RequestParam(value = "page", defaultValue = "0", required = false) int page,
    @RequestParam(value = "size", defaultValue = "20", required = false) int size,
    Authentication authentication,
    PagedResourcesAssembler assembler) {

    String username =  authentication.getName();

    Page<Account> accounts = repo.findByOwner(username, PageRequest.of(page, size));

    return ResponseEntity.ok(assembler.toResource(accounts));
}

Sebastiaan van den Broek 8 年前

return ResponseEntity.ok(new org.springframework.hateoas.Resource<>(accounts));

AccountSupport extends ResourceSupport

add(linkTo(AccountController.class).withSelfRel());

add(linkTo(AccountController.class).slash(idOfYourAccountInstance).withSelfRel())