HTTP Status 500 求救。

[Yu_Jiehang]

最近在写大作业，JAVA新手，发布到Tomcat报500错误，信息如下：
type Exception report

message Servlet execution threw an exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet execution threw an exception
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.lang.NoClassDefFoundError: org/apache/lucene/store/Directory
SearchEngine.SearchServlet.doGet(SearchServlet.java:47)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.lang.ClassNotFoundException: org.apache.lucene.store.Directory
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
SearchEngine.SearchServlet.doGet(SearchServlet.java:47)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.39 logs.

Apache Tomcat/8.0.39
求各位大神帮忙看一下，感激不尽

[Yu_Jiehang]

谢谢各位两位大神，确实是少包，我一只以为只要import进去就好了。。。。

[Small-Young]

少包，引入你缺少的jar包。看看你的lucene-core.jar有没有在WEB-INF\lib下。

[爱睡觉的阿狸]

java.lang.ClassNotFoundException: org.apache.lucene.store.Directory，应该少了jar包，网上搜一下这个jar包，导入进去