使用RepositoryRestResource-s和常规控制器对Spring REST HATEOAS中的根请求进行自定义响应

假设我有两个存储库：

@RepositoryRestResource(collectionResourceRel = "person", path = "person")
public interface PersonRepository extends PagingAndSortingRepository<Person, Long> {
    List<Person> findByLastName(@Param("name") String name);
}

但我想得到这样的东西：

{
  "_links" : {
    "person" : {
      "href" : "http://localhost:8080/person{?page,size,sort}",
      "templated" : true
    },
    "person1" : {
      "href" : "http://localhost:8080/person1{?page,size,sort}",
      "templated" : true
    },
    "hello" : {
      "href" : "http://localhost:8080/hello?name=World"
    }
  }
}

---

您需要为您的Person资源注册一个ResourceProcessory作为Bean。请参见组件 公共类HelloResourceProcessor实现ResourceProcessor{ @凌驾 公共RepositoryLinksResource进程（RepositoryLinksResource资源）{ add（ControllerLinkBuilder.linkTo（HelloController.class）.withRel（“hello”）； 返回资源； } } 基于

---

但我不想更改任何

http://localhost:8080/person

，

http://localhost:8080/person1

或

http://localhost:8080/hello

请求。我想更改

http://localhost:8080/

请求。

@Controller
public class HelloController {
    @RequestMapping("/hello")
    @ResponseBody
    public HttpEntity<Hello> hello(@RequestParam(value = "name", required = false, defaultValue = "World") String name) {
        Hello hello = new Hello(String.format("Hello, %s!", name));
        hello.add(linkTo(methodOn(HelloController.class).hello(name)).withSelfRel());
        return new ResponseEntity<>(hello, HttpStatus.OK);
    }
}

{
  "_links" : {
    "person" : {
      "href" : "http://localhost:8080/person{?page,size,sort}",
      "templated" : true
    },
    "person1" : {
      "href" : "http://localhost:8080/person1{?page,size,sort}",
      "templated" : true
    }
  }
}

{
  "_links" : {
    "person" : {
      "href" : "http://localhost:8080/person{?page,size,sort}",
      "templated" : true
    },
    "person1" : {
      "href" : "http://localhost:8080/person1{?page,size,sort}",
      "templated" : true
    },
    "hello" : {
      "href" : "http://localhost:8080/hello?name=World"
    }
  }
}

@Component
public class HelloResourceProcessor implements ResourceProcessor<RepositoryLinksResource> {

    @Override
    public RepositoryLinksResource process(RepositoryLinksResource resource) {
        resource.add(ControllerLinkBuilder.linkTo(HelloController.class).withRel("hello"));
        return resource;
    }
}