关于Tomcat的设定文档解决办法

关于Tomcat的设定文档
首先我在Tomcat的server.xml设定了数据源

<Resource name="NPIDB_NPI"
      auth="Container"
      type="javax.sql.DataSource"
      factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
      testWhileIdle="true"
      testOnBorrow="true"
      testOnReturn="false"
      validationInterval="30000"
      timeBetweenEvictionRunsMillis="30000"
      maxActive="100"
      minIdle="10"
      maxWait="10000"
      initialSize="10"
      removeAbandonedTimeout="60"
      removeAbandoned="true"
      logAbandoned="true"
      minEvictableIdleTimeMillis="30000"
      jmxEnabled="true"
      jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"
      username="plmwflow"
      password="plmwflow"
      driverClassName="oracle.jdbc.OracleDriver"
      url="jdbc:oracle:thin:@172.16.30.22:1521:pdmlink"/>

但是在Eclipse起动后就会把server.xml回复到没修改的状况
请教怎么能在eclipse里进行Tomcat文档的设定你应该是用了Eclipse的tomcat插件，这样修改tomcat配置应该从Eclipse的这个插件的界面上进行修改。