Java.lang.NoClassDefFoundError: org/apache/poi/hssf/usermodel/HSSFWorkbook异常的解决方法

Exception

org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: org/apache/poi/hssf/usermodel/HSSFWorkbook
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:978)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.j
4000
ava:635)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

将poi-3.6.jar拷贝到对应tomcat发布后\WEB-INF\lib路径下面，问题解决！maven工程出现以上异常原因是下列内容porn.xml中没有配置<dependency>            <groupId>org.apache.poi</groupId>            <artifactId>poi</artifactId>            <version>3.7</version></dependency>