启用http3模块，执行如下命令：
java -jar $JETTY_HOME/start.jar --add-modules=http3
命令的输出，如下：
ALERT: There are enabled module(s) with licenses.
The following 2 module(s):
+ contains software not provided by the Eclipse Foundation!
+ contains software not covered by the Eclipse Public License!
+ has not been audited for compliance with its license
Module: jna
+ Java Native Access (JNA) is licensed under the LGPL, version 2.1
+ or later, or (from version 4.0 onward) the Apache License,
+ version 2.0.
+ You can freely decide which license you want to apply to the project.
+ You may obtain a copy of the LGPL License at:
+ http://www.gnu.org/licenses/licenses.html
+ A copy is also included in the downloadable source code package
+ containing JNA, in file "LGPL2.1", under the same directory
+ as this file.
+ You may obtain a copy of the Apache License at:
+ http://www.apache.org/licenses/
+ A copy is also included in the downloadable source code package
+ containing JNA, in file "AL2.0", under the same directory
+ as this file.
Module: quiche
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Proceed (y/N)? y
INFO : alpn-java transitively enabled
INFO : alpn transitively enabled, ini template available with --add-modules=alpn
INFO : work transitively enabled
INFO : http2 transitively enabled, ini template available with --add-modules=http2
INFO : http3 initialized in ${jetty.base}/start.d/http3.ini
INFO : jna transitively enabled
INFO : ssl transitively enabled, ini template available with --add-modules=ssl
INFO : quiche transitively enabled
INFO : mkdir ${jetty.base}/work
INFO : mkdir ${jetty.base}/lib/http3
INFO : download https://repo1.maven.org/maven2/net/java/dev/jna/jna-jpms/5.14.0/jna-jpms-5.14.0.jar to ${jetty.base}/lib/http3/jna-jpms-5.14.0.jar
INFO : download https://repo1.maven.org/maven2/org/mortbay/jetty/quiche/jetty-quiche-native/0.20.0/jetty-quiche-native-0.20.0.jar to ${jetty.base}/lib/http3/jetty-quiche-native-0.20.0.jar
INFO : Base directory was modified
http3模块的配置文件$JETTY_BASE/start.d/http3.ini，内容如下：
# ---------------------------------------
# Module: http3
# Enables experimental support for the HTTP/3 protocol.
# ---------------------------------------
--modules=http3
## The host/address to bind the connector to.
# jetty.quic.host=0.0.0.0
## The port the connector listens on.
# jetty.quic.port=8444
## The connector idle timeout, in milliseconds.
# jetty.quic.idleTimeout=30000
## Specifies the maximum number of concurrent requests per session.
# jetty.quic.maxBidirectionalRemoteStreams=128
## Specifies the session receive window (client to server) in bytes.
# jetty.quic.sessionRecvWindow=4194304
## Specifies the stream receive window (client to server) in bytes.
# jetty.quic.bidirectionalStreamRecvWindow=2097152
## Specifies the stream idle timeout, in milliseconds.
# jetty.http3.streamIdleTimeout=30000
jetty.quic.host
监听服务的主机地址，默认值为0.0.0.0，即在本机所有的IP地址上监听链接的请求。jetty.quic.idleTimeout
链接的空闲时长，单位：毫秒，默认值为30000，即30秒。jetty.quic.maxBidirectionalRemoteStreams
单个会话中允许并行发起的请求的数量。默认值为128。jetty.quic.sessionRecvWindow
会话的接收数据的窗口，单位：字节。默认值为4194304。jetty.quic.bidirectionalStreamRecvWindow
双向传输时接收数据的窗口，缓冲区的大小，单位：字节。默认值为2097152。jetty.http3.streamIdleTimeout
单位：毫秒，默认值为30000，即30秒。
参考资料
- HTTP/3核心概念之QUIC
- Quic协议（一)------HTTP3基础之QUIC协议介绍
- 5 分钟看懂 HTTP3
- RFC 9000 QUIC: A UDP-Based Multiplexed and Secure Transport
- QUIC 开源实现列表
- QUIC-HTTP/3介绍
- HTTP 3.0之QUIC优势和TCP弊端
- [技术更新]Http/3 QUIC 基础
- 概念回顾：QUIC 和 HTTP/3