樓主使用Apache POI把word轉成HTML，是遇到一個問題；
同一個項目裏面單獨使用test.java調用POI可以吧word轉成HTML，但是放到action中或者在JSP文件裏面調用是就會出錯
type Exception report
message javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/poi/hwpf/converter/PicturesManager
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/poi/hwpf/converter/PicturesManager
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/poi/hwpf/converter/PicturesManager
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:905)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:834)
org.apache.jsp.test_jsp._jspService(test_jsp.java:107)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.lang.NoClassDefFoundError: org/apache/poi/hwpf/converter/PicturesManager
org.apache.jsp.test_jsp._jspService(test_jsp.java:95)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.lang.ClassNotFoundException: org.apache.poi.hwpf.converter.PicturesManager
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1333)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1180)
org.apache.jsp.test_jsp._jspService(test_jsp.java:95)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
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/8.0.8 logs.
錯誤的原因其實是：org/apache/poi/hwpf/converter/PicturesManager所在的jar包雖然build path,
但是Tomcat8.0\webapps\項目名\WEB-INF\lib文件夾下面沒有對應jar包（原因樓主也不懂）
解決方法：把對應的包拷貝到Tomcat8.0\webapps\項目名\WEB-INF\lib
