JSON数据问题

发布于 2024-11-03 21:01:47 字数 836 浏览 0 评论 0原文

我正在实施 RESTful Jersey 应用程序。

如果我有一个car bean：

@XmlRootElement
class Car{
  private String id;
  private String name;

  //... GETTER & SETTER 
}

My CarResource.java：

    @GET
    @Produces({MediaType.APPLICATION_JSON})
    public List<Car> getCar(@QueryParam("id") String id) {


        List cars= new ArrayList<Car>();

        cars.add(new Car(id, "my car 1"));

        return cars;
    }

如果cars列表中只有一个元素，我得到的JSON数据是

{"car":{"id":"12","name":"my car 1"}}

但我需要的是（用“[]”）：

{"car":[{"id":"12","name":"my car 1"}]}

怎么办？

PS如果cars列表中有多个元素，则JSON数据确实有“[]”。

原文

I am implementing RESTful Jersey application.

If I have a car bean:

@XmlRootElement
class Car{
  private String id;
  private String name;

  //... GETTER & SETTER 
}

My CarResource.java:

    @GET
    @Produces({MediaType.APPLICATION_JSON})
    public List<Car> getCar(@QueryParam("id") String id) {


        List cars= new ArrayList<Car>();

        cars.add(new Car(id, "my car 1"));

        return cars;
    }

If there is only one element in the cars list, the JSON data I got is

{"car":{"id":"12","name":"my car 1"}}

But what I need is (with "[ ]"):

{"car":[{"id":"12","name":"my car 1"}]}

How to do?

P.S. if there are more than one element in the cars list, the JSON data do have "[ ]".

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桃扇骨 2024-11-10 21:01:47

你必须处理这个 JavaScript 端。

假设您已将数据解析为 JavaScript 对象，请尝试类似以下操作来获取项目：

function GetCar(pObj, nPos){
    if (typeof pObj.car[0] === "object"){
        return pObj.car[nPos];
    } else {
        return pObj.car;
    }
}

//test code
var obj = {"car":{"id":"12","name":"my car 1"}};
var obj2 = {"car":[{"id":"12","name":"my car 1"}]};

alert(GetCar(obj, 0).id);
alert(GetCar(obj2, 0).id);

您可以在这个 JSFiddle

You'll have to handle this JavaScript-side.

Assuming you've parsed your data into a JavaScript object, try something like the following to get the items:

function GetCar(pObj, nPos){
    if (typeof pObj.car[0] === "object"){
        return pObj.car[nPos];
    } else {
        return pObj.car;
    }
}

//test code
var obj = {"car":{"id":"12","name":"my car 1"}};
var obj2 = {"car":[{"id":"12","name":"my car 1"}]};

alert(GetCar(obj, 0).id);
alert(GetCar(obj2, 0).id);

You can see it in action at this JSFiddle

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