怎么玩玩！开发Web服务的框架? [英] How to use play! framework to develop webservice?

问题描述

我如何使用play来开发Web服务?

How do I use play to develop webservice?

我在官方网站上找不到任何文件.

I cannot find any documents in the official site.

推荐答案

真的很简单.

播放带有许多方法，可用于将操作公开为Web服务.

Play comes with a number of methods that you can use to expose your actions as web services.

例如

render()
renderJSON()
renderXML()

这些都可以用于以特定方式呈现数据.

These can all be used to render data in a particular way.

如果您有一个Web服务，让我们假设一个RESTful Web服务，您想返回两个数字的和，则可以通过以下方式进行操作

If you had a web service, let's assume a RESTful webservice, that you wanted to return the sum of two numbers, you could do so in the following way

public class Application extends Controller {

    public static void sum(Float num1, Float num2) {
        Float result = num1 * num2;
        render(result);
    }
}

如果将路由设置为使用XML作为格式，或者在请求标头中正确设置了格式，则可以使用称为app/views/Application/sum.xml

if your route is set up to use XML as the format, or the format is set correctly in the request header, you then return the result using a normal groovy template called app/views/Application/sum.xml

要设置路由以正确设置格式，然后将以下行添加到您的route文件

To setup the route to format correctly, then add the following line to your route file

GET /webservices/sum                 Application.sum(format:'xml')

然后sum.xml看起来像

The sum.xml would then look something like

<response>
  <sum>${result}</sum>
</response>

相同的概念适用于JSON.

The same concept works for JSON.

但是，如果您不想使用常规模板，则可以简单地使用renderJSON/renderXML方法创建XML或JSON，但这确实意味着您正在控制器中构建表示逻辑.练习.

If however you don't want to use groovy templates, you could simply create the XML or JSON using the renderJSON / renderXML methods, but this does mean you are building presentation logic into your controller, which is bad practice.

作为子注释，如果您想使用Web服务，请使用play.libs.WS类.我写了一篇关于如何做到这一点的博客

As a subnote, if you want to consume webservices, then you use the play.libs.WS class. I have written a blog on how to do that

http://playframework.wordpress.com/2010/08/15/web-services-using-play/

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