与Jersey和JSR相关的JAX-RS

问题描述

我正试图了解Java中的一些概念：

I'm trying to get my head around some concepts in Java:

1. JSR（s）：描述规范，但不带实际实施。例如。 是用于RESTful Web服务的Java™API的主页 。它是JSR-311所有实现的通用参考。


2. 可以从，但是，除非您正在实施JSR -311你自己没有特别的价值？


3. JSR（s）通常/总是有一个参考实现。要找到它，您必须谷歌JSR XXX参考实施或查看规格主页（例如）


4. 对于JSR-311，这个参考实现是。使用maven，您可以从。由于
   Jersey根据，您只需要在项目中添加Jersey作为依赖项，而不是jsr311-api本身。 （这适用于所有JSR技术？）


5. 同时放置和作为项目中的依赖项可能会导致类路径问题吗？

1. JSR(s): describe specifications, but carry no actual implementations. E.g. http://jsr311.java.net/ is the "home" for "Java™ API for RESTful Web Services". It serves as a common reference for all implementations of JSR-311.
2. One can download the interfaces (?) of JSR-311 from http://mvnrepository.com/artifact/javax.ws.rs/jsr311-api, however, unless you are implementing JSR-311 by yourself these have no particular value?
3. JSR(s) will usually/always have a reference implementation. To find it you'll have to google "JSR XXX reference implementation" or see the specifications home page (e.g. http://jsr311.java.net/)
4. For JSR-311 this reference implementation is Jersey. Using maven you can get the jersey server from http://mvnrepository.com/artifact/com.sun.jersey/jersey-server/1.9. SinceJersey provides an implementation according to the interfaces found in http://mvnrepository.com/artifact/javax.ws.rs/jsr311-api, you only need to add Jersey as a dependency in your project and not the jsr311-api itself. (this applies to all JSR technologies?)
5. Putting both http://mvnrepository.com/artifact/javax.ws.rs/jsr311-api and http://mvnrepository.com/artifact/com.sun.jersey/jersey-server/1.9 as dependencies in your project will possibly cause classpath problems?

我是完全关闭还是某些人？

Am I completely off or onto someting?

推荐答案

1. 是的，这不是什么新鲜事。想想JDBC，java提供
   接口（连接，语句， ResultSet 等）但数据库供应商提供实现的价格上涨了
   。

1. Yes, this isn't anything new. Think about JDBC, java provides theinterfaces (Connection, Statement, ResultSet etc) but it is upto database vendors to provide implementations.

如果您使用的是JSR- 311实现如Jersey或Apache CXF
然后您将使用 javax.ws.rs 注释注释您的类，例如 @Path ， @GET ， @Produces 等。这就是你需要显式拥有JSR的原因-311作为maven依赖。

If you're using a JSR-311 implementation like Jersey or Apache CXFthen you'll annotate your classes with the javax.ws.rs annotations, such as @Path, @GET, @Produces etc. This is why you need to explicitly have JSR-311 as a maven dependency.

是的，通常。请查看维基上的。

Yes, usually. Have a look at the JSR list on wiki.

您需要JSR和实现。注释在JSR中，实现提供支持类，例如 com.sun.jersey.spi.container.servlet.ServletContainer 。

You need both the JSR and the implementation. The annotations are in the JSR, the implementation provides supporting classes, such as com.sun.jersey.spi.container.servlet.ServletContainer.

不，有必要兼顾两者（见第4点）;你不会遇到类路径冲突。

No, it is necessary to have both as dependencies (see point 4); you won't get classpath conflicts.

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