问题描述
我正在此处进行指导.如何产生多个mime输出.在他们的网站上，这是推荐的方式:
I am following the jersey tutorial here to figure out how one would produce multiple mime outputs. From their website, this is the recommended way:
@GET
@Produces({"application/xml", "application/json"})
public String doGetAsXmlOrJson() {
...
}
我无法弄清楚如何将@Produces抽象化，以便我的代码更欢迎使用它可以产生的其他mime类型.举例来说，我有500种方法都带有此注释:
What I cannot figure out is how to abstract the @Produces away, so that my code is more welcoming to additional mime types it can produce. Say for example I have 500 methods that all have this annotation:
@Produces({"application/xml", "application/json"})
如果我要求将kml添加为mime类型，那么编辑和替换所有这些值肯定会很耗时.
If I get a requirement to add kml as a mime type, editing and replacing all of those values would certainly be time consuming.
@Produces({"application/xml", "application/json", "application/kml"})
是否有可能更有效地设计@Produces，这样我就不会遇到这个问题了?
Is it possible to architect @Produces more efficiently so that I do not have this issue down the road?
推荐答案
了解@Produces批注
@Produces 注释是用于指定资源可以产生并发送回客户端的表示形式的MIME媒体类型.
Understanding the @Produces annotation
The @Produces annotation is used to specify the MIME media types of representations a resource can produce and send back to the client.
JAX-RS运行时比较 Accept 的值传入请求的标头，其值为 @Produces 注释以匹配将处理此类请求的资源方法.
The JAX-RS runtime compares value of the Accept header of an incoming request with the value of the @Produces annotation to match the resource method that will handle such request.
缺少 @Produces 注释，假定支持任何媒体类型(*/*).有关完整的参考，请检查 JAX-RS规范.
In the absence of the @Produces annotation, support for any media type (*/*) is assumed. For a complete reference, check the JAX-RS specification.
要减少 @Produces 代码中的注释，您可以注释资源类而不是注释 resource方法.
Tip: To reduce typographical errors you could use constant values:
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
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