解决maven的jetty插件重启后session丢失问题

maven项目使用jetty插件配置，支持热部署，解决重启session失效，需要重新登陆的问题，将下面代吗改改考到maven的<plugin>节点中就ok了，以后重新登陆就不用重新登陆了！！！！

<plugin>
     <groupId>org.eclipse.jetty</groupId>
     <artifactId>jetty-maven-plugin</artifactId>
     <version>9.4.2.v20170220</version>

     <configuration>
      <webAppSourceDirectory>/home/linye/workspace/zhongtai/webapp</webAppSourceDirectory>
      <webApp>
       <contextPath>/zhongtai</contextPath>
      </webApp>
      <httpConnector>
       <port>8080</port>
      </httpConnector>

       <!--每隔多少秒检测一次改动-->
      <scanIntervalSeconds>0</scanIntervalSeconds>
      <sessionHandler implementation="org.eclipse.jetty.server.session.SessionHandler">
       <sessionManager
        implementation="org.eclipse.jetty.server.session.HashSessionManager">
        <!-- 用于存放持久化的session路径 -->
        <storeDirectory>doc/jetty-sessions</storeDirectory>
        <idleSavePeriod>0</idleSavePeriod>
       </sessionManager>
      </sessionHandler>
     </configuration>
    </plugin>