this solution works for version 3.0.2 (io.restassured):

  JsonPath jsonPath = RestAssured.given()
     .when()
     .get("/order")
     .then()
     .assertThat()
     .statusCode(Response.Status.OK.getStatusCode())
     .assertThat()
     .extract().body().jsonPath();

  List<Order> orders = jsonPath.getList("", Order.class);

This will extract the objects for a structure like this:

public class Order {

private String id;

public String getId(){
return id; }

public void setId(String id){
this.id = id;
}


}

with the given json:

[ 
{ "id" : "5" }, 
{ "id" : "6" }
]

To extract a Java List, and not an Array, from a JSON API response, you just have to remember to use jsonPath rather than as:

List<Person> persons = given()
        .when()
        .get("/person")
        .then()
        .extract()
        .body()
        // here's the magic
        .jsonPath().getList(".", Person.class);

Your json path can point to anywhere you expect to have a list of json objects in your body. in this example (and working for your question) it just points to the json root.

sidenode: rest-assured is internally using jackson for deserialization (for .jsonPath as well as .as)