如何使用Spring HATEOAS在“链接”部分中产生链接的集合

Question

I am attempting to produce a JSON output similar to the example below:

{
    "links": {
        "self": { "href": "http://api.com/items" },
        "item": [
            { "href": "http://api.com/items/1" },
            { "href": "http://api.com/items/2" }
        ]
    "data": [
            {"itemName":"a"}, 
            {"itemName":"b"} 
     ] 
}

Notice that item is the collection of linked objects. How would I go about doing that with Spring HATEOAS?

UPDATE: Adding the same rel multiple times to my UserResource gives me the following:

"links": [
    {
        "rel": "self",
        "href": "http://localhost:8080/sophia/users/admin"
    },
    {
        "rel": "item",
        "href": "http://localhost:8080/sophia/companies/01393048000170/item/1"
    },
    {
        "rel": "item",
        "href": "http://localhost:8080/sophia/companies/01393048000170/item/2"
    },
    {
        "rel": "item",
        "href": "http://localhost:8080/sophia/companies/01393048000170/item/3"
    }
]

Answer 1

Just add multiple links with the very same rel.

Resource resource = new Resource(data);
resource.add(new Link("…", "item"));
resource.add(new Link("…", "item"));

Answer 2

you're looking to get resources kinda in a HAL+JSON seriazliation format it seems, although you've said "links" and not "_links". What you are getting them as is the Spring-HATEOAS default. You need to use @EnableHypermedia(HAL). Also you should have application/hal+json in your Accept header, and possibly your produces param of your @RequestMapping attribute.