泽西岛:有一种干净的方法来指定允许的URL扩展吗?

问题描述

我使用的是Jersey 1.17.1，在我创建的每个URL上，我都希望允许人们将".json"放在末尾.这是我所做的事的一个示例:

I'm using Jersey 1.17.1 and on every URL I've created I want to allow people to put ".json" at the end or not. Here's an example of what I've done:

@GET
@Path("basepath{extension: (\\.json)?}")
public String foobar() {
    ...
}

最终，我将让他们在".json"或".xml"一词之间进行选择，并且我担心这里的DRY违规.我将不得不将每个@Path更改为此:

Eventually I'm going to let them choose between nothing, ".json" or ".xml" and I'm concerned about my DRY violation here. I'll have to change every @Path to this instead:

@GET
@Path("basepath{extension: (\\.json|\\.xml)?}")
public String foobar() {
    ...
}

是否有更好的方法可以使我的路径值更可重用?尽管我无法使用Jersey 2.0，但我很想知道它是否可以解决此问题.

Is there a better way to do this that lets my path value be more reusable? Although I can't use Jersey 2.0, I'd be interested to know if it can solve this problem.

推荐答案

一种方法是将 PackagesResourceConfig 并通知Jersey哪些扩展应映射到哪种媒体类型.例如:

One way to do this is to subclass PackagesResourceConfig and inform Jersey which extensions should map to which media types. For instance:

public class ExampleResourceConfig extends PackagesResourceConfig {
  @Override
  public Map<String, MediaType> getMediaTypeMappings() {
    Map<String, MediaType> map = new HashMap<>();
    map.put("xml", MediaType.APPLICATION_XML_TYPE);
    map.put("json", MediaType.APPLICATION_JSON_TYPE);
    return map;
  }
}

，然后您的实际REST服务可能类似于:

and then your actual REST service might look like:

@GET
@Path("basepath")
@Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public Response foobar() {
  ...
}

Jersey将根据url扩展名选择适当的媒体类型.请注意，返回的是Response而不是String.我不确定您如何构建响应以及您的要求是什么，但是Jersey可以毫无问题地将Java bean转换为XML或JSON(甚至JSONP).

Jersey will select the appropriate media type based on the url extension. Note that Response is returned instead of String. I'm not sure how you're building your response and what your requirements are but Jersey can handle converting your Java beans into either XML or JSON (or even JSONP) without a problem.

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