如何设置(修改)jetty(maven插件maven-jetty-plugi)的端口

在使用jetty的maven插件，有两种方式来改变jetty server的端口，第一种方式较为简单，即：

通过命令行指定端口：mvn -Djetty.port=9999 jetty:run

另一种方式是在pom中的配置中通过指定新的connector来实现的，例如下述的配置文档：

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1. < plugin >   
2.     < groupId > org.mortbay.jetty </ groupId >   
3.     < artifactId > maven-jetty-plugin </ artifactId >   
4.     < version > 6.1.26 </ version >   
5.     < configuration >                
6.         < scanIntervalSeconds > 3 </ scanIntervalSeconds >   
7.         < connectors >   
8.             < connector   implementation = "org.mortbay.jetty.nio.SelectChannelConnector" >   
9.                 < port > 9090 </ port >   
10.             </ connector >   
11.         </ connectors >                      
12.         < scanTargetPatterns >   
13.             < scanTargetPattern >   
14.                 < directory > src/main/webapp/WEB-INF </ directory >   
15.                 < excludes >   
16.                     < exclude > **/*.jsp </ exclude >   
17.                 </ excludes >   
18.                 < includes >   
19.                     < include > **/*.properties </ include >   
20.                     < include > **/*.xml </ include >   
21.                 </ includes >   
22.             </ scanTargetPattern >   
23.         </ scanTargetPatterns >   
24.     </ configuration >   
25. </ plugin >