JAX-RS 和 JAX-WS 的区别是什么？

在阅读了几篇关于 JAX-RS 和 JAX-WS 的文章之后，我有几个问题想要确认一下？

  1. JAX-RS 能像 JAX-WS 一样做异步请求吗？
  2. JAX-RS 能否访问不在 Java 平台上运行的 Web 服务，反之亦然？
  3. “ REST 特别适用于 PDA 和移动电话等受限设备”是什么意思？
  4. “ JAX-RS 不需要 XML 消息或 WSDL 服务-API 定义”是什么意思？
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最佳答案

Can JAX-RS do Asynchronous Request like JAX-WS?

1) I don't know if the JAX-RS API includes a specific mechanism for asynchronous requests, but this answer could still change based on the client implementation you use.

Can JAX-RS access a web service that is not running on the Java platform, and vice versa?

2) I can't think of any reason it wouldn't be able to.

What does it mean by "REST is particularly useful for limited-profile devices, such as PDAs and mobile phones"?

3) REST based architectures typically will use a lightweight data format, like JSON, to send data back and forth. This is in contrast to JAX-WS which uses XML. I don't see XML by itself so significantly heavier than JSON (which some people may argue), but with JAX-WS it's how much XML is used that ends up making REST with JSON the lighter option.

What does it mean by "JAX-RS do not require XML messages or WSDL service–API definitions?

4) As stated in 3, REST architectures often use JSON to send and receive data. JAX-WS uses XML. It's not that JSON is so significantly smaller than XML by itself. It's mostly that JAX-WS specification includes lots overhead in how it communicates.

On the point about WSDL and API definitions, REST will more frequently use the URI structure and HTTP commands to define the API rather than message types, as is done in the JAX-WS. This means that you don't need to publish a WSDL document so that other users of your service can know how to talk to your service. With REST you will still need to provide some documentation to other users about how the REST service is organized and what data and HTTP commands need to be sent.

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Another important point

JAX-WS represents SOAP

JAX-RS represents REST

How to choose between JAX-RS and JAX-WS web services implementation?

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JAX-WS - is Java API for the XML-Based Web Services - a standard way to develop a Web- Services in SOAP notation (Simple Object Access Protocol).

Calling of the Web Services is performed via remote procedure calls. For the exchange of information between the client and the Web Service is used SOAP protocol. Message exchange between the client and the server performed through XML- based SOAP messages.

Clients of the JAX-WS Web- Service need a WSDL file to generate executable code that the clients can use to call Web- Service.

JAX-RS - Java API for RESTful Web Services. RESTful Web Services are represented as resources and can be identified by Uniform Resource Identifiers (URI). Remote procedure call in this case is represented a HTTP- request and the necessary data is passed as parameters of the query. Web Services RESTful - more flexible, can use several different MIME- types. Typically used for XML data exchange or JSON (JavaScript Object Notation) data exchange...

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i have been working on Apachi Axis1.1 and Axis2.0 and JAX-WS but i would suggest you must JAX-WS because it allow you make wsdl in any format , i was making operation as GetInquiry() in Apache Axis2 it did not allow me to Start Operation name in Upper Case , so i find it not good , so i would suggest you must use JAX-WS

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Can JAX-RS do Asynchronous Request like JAX-WS?

Yes, it can surely do use @Async

Can JAX-RS access a web service that is not running on the Java platform, and vice versa?

Yes, it can Do

What does it mean by "REST is particularly useful for limited-profile devices, such as PDAs and mobile phones"?

It is mainly use for public apis it depends on which approach you want to use.

What does it mean by "JAX-RS do not require XML messages or WSDL service–API definitions?

It has its own standards WADL(Web application Development Language) it has http request by which you can access resources they are altogether created by different mindset,In case in Jax-Rs you have to think of exposing resources


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