maven中jetty热部署

<plugin>
                         <groupId> org.mortbay.jetty</groupId >
                         <artifactId> maven-jetty-plugin</artifactId >
                         <version> 6.1.10</version >
                         <configuration>
                               <scanIntervalSeconds> 1</scanIntervalSeconds >                       
                         </configuration>
                   </plugin>

重点是这句话：<scanIntervalSeconds> 1</scanIntervalSeconds >   数字1代表间隔1秒检查是否有改动