运行我的 java web 项目时遇到奇怪的异常。在我保存对 JSP 之一的一些更改后,这似乎是“随机”发生的。我不记得更改过任何设置。我以前从未在这个项目中遇到过类似的错误,之前找到 HubPortal
类没有问题。
这是完整的堆栈跟踪:
org.apache.jasper.JasperException: An exception occurred processing JSP page /hubmainpage.jsp at line 7
4: %>
5: <%
6: String responsepage = request.getParameter("show");
7: HubPortal hp = new HubPortal();
8: List processList = hp.getProcessList();
9: List clientList = hp.getClientList();
10: List transList = hp.getTransactionTypeList();
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
org.apache.jsp.hubmainpage_jsp._jspService(hubmainpage_jsp.java:783)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
java.lang.NoClassDefFoundError: org/apache/log4j/Logger
com.middleware.hts.HubPortal.<clinit>(HubPortal.java:23)
org.apache.jsp.hubmainpage_jsp._jspService(hubmainpage_jsp.java:66)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
关于为什么我突然遇到这个错误有什么想法吗?
最佳答案
7: HubPortal hp = new HubPortal(); root cause java.lang.NoClassDefFoundError: org/apache/log4j/Logger com.middleware.hts.HubPortal.<clinit>(HubPortal.java:23)
这意味着 log4j jar file webapp 的运行时类路径中缺少,而 HubPortal
需要它。类(class)。您需要将其放在与包含 HubPortal
的 JAR 文件相同的位置。类,例如 /WEB-INF/lib
文件夹或其他任何地方 HubPortal
类是。
关于java - 出现奇怪的 java.lang.NoClassDefFoundError 异常,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8158713/