javax.servlet.ServletException：java.lang.NoClassDefFoundError：org / apache / commons / dbcp / ConnectionFactory

Question

我收到以下错误：

javax.servlet.ServletException：java.lang.NoClassDefFoundError：org / apache / commons / dbcp / ConnectionFactory

我添加了相关的jars commons-dbcp-1.4.jar和commons-pool-1.4.jar，但错误未解决。

Stacktrace:

堆栈跟踪：org.apache.jasper.servlet.JspServletWrapper.handleJspException（JspServletWrapper.java:579）org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:461）org.apache.jasper.servlet.JspServlet.serviceJspFile （JspServlet.java:396）org.apache.jasper.servlet.JspServlet.service（JspServlet.java:340）javax.servlet.http.HttpServlet.service（HttpServlet.java:729)org.apache.tomcat.websocket.server .WsFilter.doFilter（WsFilter.java:52）根本原因

javax.servlet.ServletException：java.lang.NoClassDefFoundError：org / apache / commons / dbcp / ConnectionFactory org.apache.jasper.runtime.PageContextImpl.doHandlePageException（PageContextImpl.java:909）org.apache.jasper.runtime.PageContextImpl.handlePageException （PageContextImpl.java:838)org.apache.jsp.ozLogin_jsp._jspService(ozLogin_jsp.java:470)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service （HttpServlet.java:729）org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:438）org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:396)org.apache.jasper.servlet .JspServlet.service（JspServlet.java:340）javax.servlet.http.HttpServlet.service（HttpServlet.java:729）org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）根本原因

java.lang.NoClassDefFoundError：org / apache / commons / dbcp / ConnectionFactory org.apache.jsp.ozLogin_jsp._jspService（ozLogin_jsp.java:189)org.apache.jasper.runtime.HttpJspBase.service(httpJspBase.java:70)javax .servlet.http.HttpServlet.service（HttpServlet.java:729）org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:438）org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:396 ）org.apache.jasper.servlet.JspServlet.service（JspServlet.java:340）javax.servlet.http.HttpServlet.service（HttpServlet.java:729）org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter） .java：52）根本原因

java.lang.ClassNotFoundException：org.apache.commons.dbcp.ConnectionFactory org.apache.catalina.loader.WebappClassLoaderBase.loadClass（WebappClassLoaderBase.java:1335)org.apache.catalina.loader.WebappClassLoaderBase.loadClass（WebappClassLoaderBase.java:1163 ）org.apache.jsp.ozLogin_jsp._jspService(ozLogin_jsp.java:189)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service(httpServlet.java:729 ）org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:438）org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:396)org.apache.jasper.servlet.JspServlet.service(JspServlet） .java：340）javax.servlet.http.HttpServlet.service（HttpServlet.java:729）org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）

Answer 1

将jar添加到Tomcat lib文件夹为我修复了错误