如何在JSF框架中实现JAX-RS RESTful服务 [英] How to implement JAX-RS RESTful service in JSF framework

问题描述

在我的实验室中，我被要求使用JSF框架创建一个简单的网站，并同时使用REST.我对这两个做了一些研究.事实证明，对于REST，我必须结合使用Jersey和JAX-RS框架.我想知道如何集成这两个框架，即JAX-RS和JSF?

In my lab I was asked to create a simple website using JSF framework and use REST as well. I did some research on those two. It turns out that for REST I have to use JAX-RS framework with Jersey. I was wondering how can I integrate these two frameworks, JAX-RS and JSF?

我已经在web.xml中的以下servlet用于JSF:

I've already the below servlet in web.xml for JSF:

<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/test/*</url-pattern>
</servlet-mapping>

对于Jersey，我认为我必须在web.xml中使用以下servlet:

For Jersey I figured that I have to use the below servlet in web.xml:

<servlet>
    <servlet-name>Jersey REST Service</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.jbm.rest</param-value>
    </init-param>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>/api/*</url-pattern>
</servlet-mapping>

现在我担心的是，在我看来，这个Jersey servlet将取代web.xml中的Faces servlet.这会将我的应用程序从JSF更改为JAX-RS.但是我想保留JSF并同时使用JAX-RS.我该怎么办?

Now my concern is, to me it seems like this Jersey servlet will replace the Faces servlet in web.xml. This will change my application from JSF to JAX-RS. But I want to keep JSF and use JAX-RS as well. How can I do that?

推荐答案

不必担心.您可以在单个Web应用程序中安全地拥有多个servlet，只要它们的URL模式不会相互冲突即可.通常，如果是这种情况，那么在webapp启动过程中，一个比较不错的servlet容器将已经引发异常.就您而言，您已经在/test/*上注册了JSF servlet(顺便说一句，您

This concern is unnecessary. You can safely have multiple servlets in a single web application, as long as their URL patterns do not clash with each other. Usually, if that were the case, a bit sane servlet container would already throw an exception during webapp's startup. In your case, you've registered the JSF servlet on /test/* (which is a strange, by the way, you usually use *.xhtml for that), and you've registered the JAX-RS servlet on /api/*. So you just have to call them using URLs matching those URL patterns.

并且，为了消除概念上的误解，您完全不能也不能在JSF中实现REST".它们彼此完全独立.他们可以轻松地在同一个Web应用程序中彼此轻松地彼此相邻运行，而无需彼此了解.他们唯一可以共享的是服务层或共享"(CDI)托管bean.但是通常就是这样.服务层的设计又与使用它的人无关.

And, to clear out a conceptual misunderstanding, you don't and can't "implement REST in JSF" at all. They are completely independent from each other. They can just easily run next each other in the same web application in all peace without knowing about each other. The only thing which they might share is the service layer or 'shared' (CDI) managed beans. But that's usually it. The design of the service layer is in turn independent from who's using it.

此特定问题与JSF或JAX-RS无关.只是基本servlets .退一步，花一点时间来了解更多，这可能也是值得的. 关于每个Java EE Web应用程序的基本组成部分.

This specific problem is not related to JSF nor JAX-RS. It's just basic servlets. It might be as well worth the effort to take a step back to the basics and spend a bit time to learn more about the building stone of basically every Java EE web application.

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