60秒创建RESTful Web Services

60秒创建RESTful Web Services，这可能吗？我给你展示一下如何快速创建RESTful Web Services。

首先准备好开发环境：

1. NetBeans IDE 6.x, I had the latest 6.5 M1 version downloaded.
2. JDK version 5 or 6
3. GlassFish V2 Application Server

如果不了解REST的话，查看下面链接学习一下先：

    * RESTful Web Services
    * Implementing RESTful Web Services in Java
    * JSR 311: JAX-RS: The JavaTM API for RESTful Web Services

都准备好了？让我们开始吧。

创建一个新项目
Choose File -> New Project. Select Web within the Categories and select Web Application

under Projects and click Next.



2.输入项目名HelloWorldRestWS



3。在下图中选择GlassFish V2作为server，Java EE 5作为java版本



创建web resource

1。右键选择项目，选择New - RESTful Web Services，在下面界面中选择Singleton Pattern



2。然后确认输入，不要忘记改变 MIME Type，从application/xml 变成 text/plain



3.IDE自动生成的代码如下：

/*
 *  HelloWorldResource
 *
 * Created on July 23, 2008, 10:13 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.stelligent.ws;

import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.ProduceMime;
import javax.ws.rs.ConsumeMime;

/**
 * REST Web Service
 *
 * @author meerasubbarao
 */

@Path("helloWorld")
public class HelloWorldResource {
    @Context
    private UriInfo context;

    /** Creates a new instance of HelloWorldResource */
    public HelloWorldResource() {
    }

    /**
     * Retrieves representation of an instance of com.stelligent.ws.HelloWorldResource
     * @return an instance of java.lang.String
     */
    @GET
    @ProduceMime("text/plain")
    public String getText() {
        //TODO return proper representation object
        throw new UnsupportedOperationException();
    }

    /**
     * PUT method for updating or creating an instance of HelloWorldResource
     * @param content representation for the resource
     * @return an HTTP response with content of the updated or created resource.
     */
    @PUT
    @ConsumeMime("text/plain")
    public void putText(String content) {
    }
}

测试RESTful Web Services

1。右键点击项目选择Test RESTful Web Services，GlassFish V2 application server启动，应用部署。



2.出现错了？


3.不用着急，我们可以修复它。

    /**
     * Retrieves representation of an instance of com.stelligent.ws.HelloWorldResource
     * @return an instance of java.lang.String
     */
    @GET
    @ProduceMime("text/plain")
    public String getText() {
        //TODO return proper representation object
        throw new UnsupportedOperationException();
    }

修改为：

/**
     * Retrieves representation of an instance of com.stelligent.ws.HelloWorldResource
     * @return an instance of java.lang.String
     */
    @GET
    @ProduceMime("text/plain")
    public String sayHello{
        //TODO return proper representation object
        return "Hello World from REST web services generated in 60 seconds";
    }

4。运行应用：



成功了，很简单吧！

来自：http://www.testearly.com/2008/07/23/restful-web-services-in-60-seconds/