Jetty具有嵌入各种应用程序的丰富历史。 在本节中,我们将向您介绍我们的git存储库中的embedded-jetty-examples项目下的一些简单示例。
重要:生成此文档时,将直接从我们的git存储库中提取这些文件。 如果行号不对齐,请随时在github中修复此文档,并向我们提供拉取请求,或者至少打开一个问题以通知我们该差异。
简单的文件服务器
此示例显示如何在Jetty中创建简单文件服务器。 它非常适合需要实际Web服务器来获取文件的测试用例,它可以很容易地配置为从src / test / resources下的目录提供文件。 请注意,这在文件缓存中没有任何逻辑,无论是在服务器内还是在响应上设置适当的标头。 它只是几行,说明了提供一些文件是多么容易。
//
// ========================================================================
// Copyright (c) 1995-2018 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
// package org.eclipse.jetty.embedded; import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.DefaultHandler;
import org.eclipse.jetty.server.handler.HandlerList;
import org.eclipse.jetty.server.handler.ResourceHandler; /**
* Simple Jetty FileServer.
* This is a simple example of Jetty configured as a FileServer.
*/
public class FileServer
{
public static void main(String[] args) throws Exception
{
// Create a basic Jetty server object that will listen on port 8080. Note that if you set this to port 0
// then a randomly available port will be assigned that you can either look in the logs for the port,
// or programmatically obtain it for use in test cases.
Server server = new Server(8080); // Create the ResourceHandler. It is the object that will actually handle the request for a given file. It is
// a Jetty Handler object so it is suitable for chaining with other handlers as you will see in other examples.
ResourceHandler resource_handler = new ResourceHandler(); // Configure the ResourceHandler. Setting the resource base indicates where the files should be served out of.
// In this example it is the current directory but it can be configured to anything that the jvm has access to.
resource_handler.setDirectoriesListed(true);
resource_handler.setWelcomeFiles(new String[]{ "index.html" });
resource_handler.setResourceBase("."); // Add the ResourceHandler to the server.
HandlerList handlers = new HandlerList();
handlers.setHandlers(new Handler[] { resource_handler, new DefaultHandler() });
server.setHandler(handlers); // Start things up! By using the server.join() the server thread will join with the current thread.
// See "http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Thread.html#join()" for more details.
server.start();
server.join();
}
}
启动后你应该可以导航到http:// localhost:8080 / index.html(假设一个在资源库目录中)。
Maven坐标
要在项目中使用此示例,您需要声明以下Maven依赖项。
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>${project.version}</version>
</dependency>
Split File Server
此示例构建在简单文件服务器上,以显示如何将多个ResourceHandler链接在一起可以聚合多个目录以在单个路径上提供内容,以及如何将这些目录与ContextHandler链接在一起。
//
// ========================================================================
// Copyright (c) 1995-2018 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
// package org.eclipse.jetty.embedded; import java.io.File; import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.server.handler.ContextHandlerCollection;
import org.eclipse.jetty.server.handler.ResourceHandler;
import org.eclipse.jetty.toolchain.test.MavenTestingUtils;
import org.eclipse.jetty.util.resource.Resource; /**
* A {@link ContextHandlerCollection} handler may be used to direct a request to
* a specific Context. The URI path prefix and optional virtual host is used to
* select the context.
*/
public class SplitFileServer
{
public static void main( String[] args ) throws Exception
{
// Create the Server object and a corresponding ServerConnector and then
// set the port for the connector. In this example the server will
// listen on port 8090. If you set this to port 0 then when the server
// has been started you can called connector.getLocalPort() to
// programmatically get the port the server started on.
Server server = new Server();
ServerConnector connector = new ServerConnector(server);
connector.setPort(8090);
server.setConnectors(new Connector[] { connector }); // Create a Context Handler and ResourceHandler. The ContextHandler is
// getting set to "/" path but this could be anything you like for
// builing out your url. Note how we are setting the ResourceBase using
// our jetty maven testing utilities to get the proper resource
// directory, you needn't use these, you simply need to supply the paths
// you are looking to serve content from.
ResourceHandler rh0 = new ResourceHandler(); ContextHandler context0 = new ContextHandler();
context0.setContextPath("/");
File dir0 = MavenTestingUtils.getTestResourceDir("dir0");
context0.setBaseResource(Resource.newResource(dir0));
context0.setHandler(rh0); // Rinse and repeat the previous item, only specifying a different
// resource base.
ResourceHandler rh1 = new ResourceHandler(); ContextHandler context1 = new ContextHandler();
context1.setContextPath("/");
File dir1 = MavenTestingUtils.getTestResourceDir("dir1");
context1.setBaseResource(Resource.newResource(dir1));
context1.setHandler(rh1); // Create a ContextHandlerCollection and set the context handlers to it.
// This will let jetty process urls against the declared contexts in
// order to match up content.
ContextHandlerCollection contexts = new ContextHandlerCollection();
contexts.setHandlers(new Handler[] { context0, context1 }); server.setHandler(contexts); // Start things up!
server.start(); // Dump the server state
System.out.println(server.dump()); // The use of server.join() the will make the current thread join and
// wait until the server is done executing.
// See http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html#join()
server.join();
}
}
启动后,你应该可以导航到http:// localhost:8090 / index.html(假设一个在资源库目录中),你可以正常访问。 任何文件请求都将在第一个资源处理程序中查找,然后在第二个资源处理程序中查找,依此类推。
Maven Coordinates
要在项目中使用此示例,您需要声明以下maven依赖项。 我们建议您不要在实际应用程序中使用工具链依赖项。
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty.toolchain</groupId>
<artifactId>jetty-test-helper</artifactId>
<version>2.2</version>
</dependency>
参考资料:http://www.eclipse.org/jetty/documentation/9.4.x/embedded-examples.html