Jetty 9 支持 SPDY 和 WebSocket。
下载地址：
http://download.eclipse.org/jetty/stable-9/dist/
Maven：
http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.eclipse.jetty%22%20AND%20v%3A%229.0.0..v20130308%22
Jetty 9.x 特性:
Completely overhauled I/O layer
Servlet API 3.0
JSP 2.2
SPDY/3
WebSocket (RFC-6455)
移植到 Jetty 9.x 的要求：
Requires Java 1.7 or newer.
Jetty Maven Plugin has now been moved to org.eclipse.jetty groupId
There is no org.mortbay or codehaus components
Support for early WebSocket drafts has been dropped, only support released RFC-6455 spec.
There now only 1 aggregate jar, called jetty-all.
Bad UTF8 encoding will result in replacement characters being passed into the application to handle. (older versions of Jetty would fail the request)
Removal of all traditional Socket (BIO) Connectors.
Only supporting NIO for Connectors.
Consolidated all of the various Deployment technique and scenarios into one.
ContextDeployer and WebAppDeployer have been removed
DeploymentManager has only 1 AppProvider now, the WebAppProvider
WebAppProvider supports both Deployment Descriptors deployment and traditional Automatic WAR deployment.
New Jetty Async Http Client
New Jetty WebSocket Servlet & WebSocket Client
A new Jetty XML DTD (http://www.eclipse.org/jetty/configure_9.0.dtd) changes the syntax in your Jetty XML to
Removed Jetty6Continuation support
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