RESTful WebService 入门实例

/* 新建MavenProject，使用以下代码，创建类和POM文件。
使用命令行切换到Project根目录，运行mvn package(或者，选中pom.xml 文件右键单击 > run as maven build > 在goals中填入 "clean package") , mvn exec:java 或 对于包含main方法的类my.restful.Main, run as Java application。

,即可启动RESTful service。
在浏览器中输入http://localhost:8080/myapp/myresource/，
此时会显示内容： Got it!

---<<Java RESTful Web Service 实战 >>*/

 package my.restful;

 import org.glassfish.grizzly.http.server.HttpServer;
 import org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpServerFactory;
 import org.glassfish.jersey.server.ResourceConfig;

 import java.io.IOException;
 import java.net.URI;

 /**
  * Main class.
  *
  */
 public class Main {
     // Base URI the Grizzly HTTP server will listen on
     public static final String BASE_URI = "http://localhost:8080/myapp/";

     /**
      * Starts Grizzly HTTP server exposing JAX-RS resources defined in this application.
      * @return Grizzly HTTP server.
      */
     public static HttpServer startServer() {
         // create a resource config that scans for JAX-RS resources and providers
         // in my.restful package
         final ResourceConfig rc = new ResourceConfig().packages("my.restful");

         // create and start a new instance of grizzly http server
         // exposing the Jersey application at BASE_URI
         return GrizzlyHttpServerFactory.createHttpServer(URI.create(BASE_URI), rc);
     }

     /**
      * Main method.
      * @param args
      * @throws IOException
      */
     public static void main(String[] args) throws IOException {
         final HttpServer server = startServer();
         System.out.println(String.format("Jersey app started with WADL available at "
                 + "%sapplication.wadl\nHit enter to stop it...", BASE_URI));
         System.in.read();
         server.stop();
     }
 }

package my.restful;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

/**
 * Root resource (exposed at "myresource" path)
 */
@Path("myresource")
public class MyResource {

    /**
     * Method handling HTTP GET requests. The returned object will be sent
     * to the client as "text/plain" media type.
     *
     * @return String that will be returned as a text/plain response.
     */
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String getIt() {
        return "Got it!";
    }
}

package my.restful;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;

import org.glassfish.grizzly.http.server.HttpServer;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;

public class MyResourceTest {

    private HttpServer server;
    private WebTarget target;

    @Before
    public void setUp() throws Exception {
        // start the server
        server = Main.startServer();
        // create the client
        Client c = ClientBuilder.newClient();

        // uncomment the following line if you want to enable
        // support for JSON in the client (you also have to uncomment
        // dependency on jersey-media-json module in pom.xml and Main.startServer())
        // --
        // c.configuration().enable(new org.glassfish.jersey.media.json.JsonJaxbFeature());

        target = c.target(Main.BASE_URI);
    }

    @After
    public void tearDown() throws Exception {
        server.stop();
    }

    /**
     * Test to see that the message "Got it!" is sent in the response.
     */
    @Test
    public void testGetIt() {
        String responseMsg = target.path("myresource").request().get(String.class);
        assertEquals("Got it!", responseMsg);
    }
}

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

     <modelVersion>4.0.0</modelVersion>

     <groupId>my.restful</groupId>
     <artifactId>my-first-service</artifactId>
     <packaging>jar</packaging>
     <version>1.0-SNAPSHOT</version>
     <name>my-first-service</name>

     <dependencyManagement>
         <dependencies>
             <dependency>
                 <groupId>org.glassfish.jersey</groupId>
                 <artifactId>jersey-bom</artifactId>
                 <version>${jersey.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
         </dependencies>
     </dependencyManagement>

     <dependencies>
         <dependency>
             <groupId>org.glassfish.jersey.containers</groupId>
             <artifactId>jersey-container-grizzly2-http</artifactId>
         </dependency>
         <!-- uncomment this to get JSON support:
          <dependency>
             <groupId>org.glassfish.jersey.media</groupId>
             <artifactId>jersey-media-moxy</artifactId>
         </dependency>
         -->
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>4.9</version>
             <scope>test</scope>
         </dependency>
     </dependencies>

     <build>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>2.5.1</version>
                 <inherited>true</inherited>
                 <configuration>
                     <source>1.7</source>
                     <target>1.7</target>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
                 <version>1.2.1</version>
                 <executions>
                     <execution>
                         <goals>
                             <goal>java</goal>
                         </goals>
                     </execution>
                 </executions>
                 <configuration>
                     <mainClass>my.restful.Main</mainClass>
                 </configuration>
             </plugin>
         </plugins>
     </build>

     <properties>
         <jersey.version>2.22.1</jersey.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 </project>