Java 球衣 2：独立？

Question

是否可以在 java 应用程序中独立使用 Jersey REST 服务？我找到的每个示例都在网络容器 (web.xml) 的上下文中。

感谢帮助！

Answer 1

只需关注 Jersey docs getting started。它使用 Grizzly 服务器创建一个独立的服务器。使用 Maven，您可以使用以下原型命令轻松创建它。

mvn archetype:generate -DarchetypeArtifactId=jersey-quickstart-grizzly2 \
-DarchetypeGroupId=org.glassfish.jersey.archetypes -DinteractiveMode=false \
-DgroupId=com.example -DartifactId=simple-service -Dpackage=com.example \
-DarchetypeVersion=2.27

最后一个参数 -DarchetypeVersion 可以替换为您想要的任何 2.x 版本。目前最新的是2.27.

在运行执行此命令后，您将从命令行生成主 class 您运行。

另一种方法是使用Spring Boot (which a lot of people are using), you can check out the official example and check out the docs

更新

如果您不使用 Maven，下面是与原型一起引入的所有 jar。大多数都包含在 Jersey RI bundle you download from the docs 中。找出不在捆绑包中的那些并搜索它们。

我认为未包含在 RI 捆绑包 DL 中的是

灰熊框架
灰熊-http
grizzly-http-server
jersey-container-grizzly2-http

这是从原型生成的所有 classes。

com.example.MyResource

package com.example;

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!";
    }
}

com.example.Main

package com.example;

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 com.example package
        final ResourceConfig rc = new ResourceConfig().packages("com.example");

        // 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();
    }
}

（测试）com.example.MyResource测试

package com.example;

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);
    }
}

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