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>
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