스프링 데이터 Common 14. 웹 기능 4부 HATEOAS - KwangtaekJung/inflearn-spring-data-jpa-keesun GitHub Wiki

스프링 데이터 Common: Web 4부: HATEOAS

  • Page를 PagedResource로 변환하기

    • 일단 HATEOAS 의존성 추가 (starter-hateoas)
    • 핸들러 매개변수로 PagedResourcesAssembler

  • 의존성 추가

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-hateoas</artifactId>
		</dependency>
    @GetMapping("/posts")
    public PagedModel<EntityModel<Post>> getPosts(Pageable pageable, PagedResourcesAssembler<Post> assembler) {
        return assembler.toModel(postRepository.findAll(pageable));
    }
  • 리소스로 변환하기 전
{  
   "content":[  
...
      {  
         "id":111,
         "title":"jpa",
         "created":null
      }
   ],
   "pageable":{  
      "sort":{  
         "sorted":true,
         "unsorted":false
      },
      "offset":20,
      "pageSize":10,
      "pageNumber":2,
      "unpaged":false,
      "paged":true
   },
   "totalElements":200,
   "totalPages":20,
   "last":false,
   "size":10,
   "number":2,
   "first":false,
   "numberOfElements":10,
   "sort":{  
      "sorted":true,
      "unsorted":false
   }
}
  • 리소스로 변환한 뒤
   "_embedded":{  
      "postList":[  
         {  
            "id":140,
            "title":"jpa",
            "created":null
         },
...
         {  
            "id":109,
            "title":"jpa",
            "created":null
         }
      ]
   },
   "_links":{  
      "first":{  
         "href":"http://localhost/posts?page=0&size=10&sort=created,desc&sort=title,asc"
      },
      "prev":{  
         "href":"http://localhost/posts?page=1&size=10&sort=created,desc&sort=title,asc"
      },
      "self":{  
         "href":"http://localhost/posts?page=2&size=10&sort=created,desc&sort=title,asc"
      },
      "next":{  
         "href":"http://localhost/posts?page=3&size=10&sort=created,desc&sort=title,asc"
      },
      "last":{  
         "href":"http://localhost/posts?page=19&size=10&sort=created,desc&sort=title,asc"
      }
   },
   "page":{  
      "size":10,
      "totalElements":200,
      "totalPages":20,
      "number":2
   }
}
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