python第三天 文件的操作习题

Posted 2020-10-17

文件内容如下：以tomcat的server.xml文件为例

1.查找 Server下有多少个<Listener>节点，并打印出来

2.在文件我末尾增加一个

<Service>

　　<Host name="127.0.0.1" appBase="java"

            unpackWARs="false" autoDeploy="false">

</Service>,要求这个service 在server里面

3.修改，讲增加的那个service里面的

unpackWARs="false" autoDeploy="false" 改为
unpackWARs="true" autoDeploy="true"

4.删除自己增加的那部分内容

<?xml version=‘1.0‘ encoding=‘utf-8‘?>

<Server port="8085" shutdown="SHUTDOWN">

 
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
  <Listener className="org.apache.catalina.core.JasperListener" />
  <!-- Prevent memory leaks due to use of particular java/javax APIs-->
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

  <GlobalNamingResources>
  
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>

  <Service name="Catalina">
  
    <Connector port="8099" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" />

    <Connector port="8089" protocol="AJP/1.3" redirectPort="8443" />

    <Engine name="Catalina" defaultHost="localhost">

      <Realm className="org.apache.catalina.realm.LockOutRealm">
       
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
            
   
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
               prefix="localhost_access_log." suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" resolveHosts="false"/>

      </Host>
    </Engine>
  </Service>
</Server>