使用eclipse neon配置Apache tomcat 9.0时出错

Question

我已经安装了apache tomcat 9.0版，并且在eclipse neon上进行配置时遇到以下错误： -

java.lang.NoClassDefFoundError: org/apache/tomcat/util/digester/Digester
    at org.apache.catalina.startup.Catalina.createStartDigester(Catalina.java:272)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:514)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:630)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:311)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:494)

Any idea what is the solution?