Jetty初探
Posted 代码浮生
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一、在jetty中部署web应用
Jetty 和 Tomcat 一样都是一个web server的container, 用户可以在里面 deploy 自己的 war 包,然后启动 Jetty, 进而通过浏览器去访问你的 web content.
从jetty官网下载jetty 9的压缩包,并解压到本地。假设jetty的路径是D:\jetty-9, 在CMD里运行
> cd D:\jetty-9\demo-base > java -jar ..\start.jar
2015-06-04 10:50:44.806:INFO::main: Logging initialized @334ms 2015-06-04 10:50:44.858:WARN:oejs.HomeBaseWarning:main: This instance of Jetty is not running from a separate {jetty.base} directory, this is not recommended. See documentation at http://www.eclipse.org/jetty/documentation/current/startup.html 2015-06-04 10:50:44.995:INFO:oejs.Server:main: jetty-9.3.0.v20150601 2015-06-04 10:50:45.012:INFO:oejdp.ScanningAppProvider:main: Deployment monitor [file:///opt/jetty-distribution-9.3.0.v20150601/webapps/] at interval 1 2015-06-04 10:50:45.030:INFO:oejs.ServerConnector:main: Started [email protected]{HTTP/1.1,[http/1.1]}{0.0.0.0:8080} 2015-06-04 10:50:45.030:INFO:oejs.Server:main: Started @558ms
jetty 被启动,这时便可以访问http://localhost:8080去访问demo相关的内容了。Jetty 9中一项重大的改动就是允许一个server实例的内容与jetty自身的distribution隔离。用户在创建web应用时先创建一个新的Jetty Base.
> JETTY_BASE=/tmp/mybase > mkdir $JETTY_BASE > cd $JETTY_BASE > java -jar $JETTY_HOME/start.jar WARNING: Nothing to start, exiting ... Usage: java -jar start.jar [options] [properties] [configs] java -jar start.jar --help # for more information > java -jar $JETTY_HOME/start.jar --add-to-startd=http,deploy INFO: server initialised (transitively) in ${jetty.base}/start.d/server.ini INFO: http initialised in ${jetty.base}/start.d/http.ini INFO: security initialised (transitively) in ${jetty.base}/start.d/security.ini INFO: servlet initialised (transitively) in ${jetty.base}/start.d/servlet.ini INFO: webapp initialised (transitively) in ${jetty.base}/start.d/webapp.ini INFO: deploy initialised in ${jetty.base}/start.d/deploy.ini MKDIR: ${jetty.base}/webapps INFO: Base directory was modified > cp $JETTY_HOME/demo-base/webapps/async-rest.war webapps/ROOT.war > java -jar $JETTY_HOME/start.jar 2015-06-04 11:10:16.286:INFO::main: Logging initialized @274ms 2015-06-04 11:10:16.440:INFO:oejs.Server:main: jetty-9.3.0.v20150601 2015-06-04 11:10:16.460:INFO:oejdp.ScanningAppProvider:main: Deployment monitor [file:///tmp/mybase/webapps/] at interval 1 2015-06-04 11:10:16.581:WARN::main: async-rest webapp is deployed. DO NOT USE IN PRODUCTION! 2015-06-04 11:10:16.589:INFO:oejw.StandardDescriptorProcessor:main: NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet 2015-06-04 11:10:16.628:INFO:oejsh.ContextHandler:main: Started [email protected]{/,[file:///tmp/jetty-0.0.0.0-8080-ROOT.war-_-any-4510228025526425427.dir/webapp/, jar:file:///tmp/jetty-0.0.0.0-8080-ROOT.war-_-any-4510228025526425427.dir/webapp/WEB-INF/lib/example-async-rest-jar-9.3.0.v20150601.jar!/META-INF/resources],AVAILABLE}{/ROOT.war} 2015-06-04 11:10:16.645:INFO:oejs.ServerConnector:main: Started [email protected]{HTTP/1.1,[http/1.1]}{0.0.0.0:8080} 2015-06-04 11:10:16.646:INFO:oejs.Server:main: Started @634ms
二、在java中部署jetty
Jetty的口号是"Don‘t deploy your application in Jetty, deploy Jetty in your application",这也是Jetty与Tomcat最大的不同。在jetty中部署应用其实可以算是jetty的附带功能,jetty真正为人们所广泛应用的是deploy jetty in application.
下面是java中部署jetty的helloworld。
程序入口SimplestServer.main
package com.mustone; import org.eclipse.jetty.server.Server; public class SimplestServer { public static void main(String[] args) throws Exception { Server server = new Server(8081); server.setHandler(new HelloHandler()); server.start(); server.join(); } }
package com.mustone; import org.eclipse.jetty.server.Request; import org.eclipse.jetty.server.handler.AbstractHandler; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; public class HelloHandler extends AbstractHandler { public void handle(String target, Request baseRequest,HttpServletRequest request, HttpServletResponse response) throws IOException { response.setContentType("text/html;charset=utf-8"); response.setStatus(HttpServletResponse.SC_OK); baseRequest.setHandled(true); response.getWriter().println("<h1>Hello World</h1>"); } }
运行SimplestServer, web server就启起来了
2016-03-10 03:05:42.974:INFO:oejs.Server:jetty-7.6.17.v20150415 2016-03-10 03:05:43.043:INFO:oejs.AbstractConnector:Started [email protected]:8081
这时访问http://localhost:8081就可以看到Hello World的字样。
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