我想使用包tomcat8-examples中的Ubuntu存储库中的Tomcat示例。它们安装在/usr/share/tomcat8-examples中。他们的政策条目/etc/tomcat8/policy.d/10examples.policy。这是文字：
grant codeBase "file:${catalina.home}/bin/tomcat-juli.jar" {
permission java.io.FilePermission "/usr/share/tomcat8-examples/examples/WEB-INF/classes/logging.properties", "read";
};
现在我将示例的内容复制到$CATALINA_BASE/webapps中我自己的文件夹中。但Tomcat不会部署它，甚至不是主要的index.html。
我收集我需要为它制定政策，就像最初的例子一样。因此，沿着这些方向：
grant codeBase "file:${catalina.home}/bin/tomcat-juli.jar" {
permission java.io.FilePermission "/var/lib/tomcat8/webapps/start/WEB-INF/classes/logging.properties", "read";
};
/var/lib/tomcat8/是$CATALINA_BASE，btw。
现在我不确定将此政策放在何处。我试图将其附加到/var/cache/tomcat8/catalina.policy，但它没有用。我的下一个想法是/etc/tomcat8/policy.d。但是......提示会很好。此外，如果您了解一些 easy 概述servlet的安全问题＆amp; co，那也不错。 （我知道Tomcat在他们的文档中介绍了这一点，我的意思是 更容易 。）谢谢。
修改
如果有人可以解释这是什么以及为什么（而不是或者别的）：
permission java.io.FilePermission "/var/lib/tomcat8/webapps/start/WEB-INF/classes/logging.properties", "read";
那会很棒。
修改
localhost_access_log.2016-07-15.txt：
127.0.0.1 - - [15/Jul/2016:20:38:53 +0200] "GET /start HTTP/1.1" 404 1022
Tomcat Web Application Manger，从那里开始服务之后：
FAIL - Application at context path /start could not be started
FAIL - Encountered exception org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/start]]
localhost_access_log.2016-07-15.txt，如上所述：
15-Jul-2016 20:46:11.381 INFO [http-nio-8080-exec-9] org.apache.catalina.core.ApplicationContext.log HTMLManager: init: Associated with Deployer 'Catalina:type=Deployer,host=localhost'
15-Jul-2016 20:46:11.382 INFO [http-nio-8080-exec-9] org.apache.catalina.core.ApplicationContext.log HTMLManager: init: Global resources are available
15-Jul-2016 20:46:11.404 INFO [http-nio-8080-exec-9] org.apache.catalina.core.ApplicationContext.log HTMLManager: list: Listing contexts for virtual host 'localhost'
15-Jul-2016 20:46:20.358 INFO [http-nio-8080-exec-2] org.apache.catalina.core.ApplicationContext.log HTMLManager: start: Starting web application '/start'
15-Jul-2016 20:46:20.431 SEVERE [http-nio-8080-exec-2] org.apache.catalina.core.ApplicationContext.log FAIL - Application at context path /start could not be started
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/start]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1293)
at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:666)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:217)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:614)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:304)
at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:162)
at org.apache.catalina.startup.ContextConfig.processJarsForWebFragments(ContextConfig.java:1890)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1128)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:780)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:305)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:95)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5154)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
... 32 more