错误关于struts

最新推荐文章于 2022-11-29 23:09:51 发布

最新推荐文章于 2022-11-29 23:09:51 发布 · 115 阅读

文章标签：

#Struts #Apache #Java #Servlet #Bean

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本文分析了在使用Struts框架实现登录功能时遇到的NullPointerException异常，并详细解释了异常产生的原因及解决办法。

type Exception report

message

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

exception

org.apache.jasper.JasperException: Exception creating bean of class app.LogonForm: {1} at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) ...

root cause

javax.servlet.ServletException: Exception creating bean of class app.LogonForm: {1} at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:533) at org.apache.jsp.Logon_jsp._jspService(Logon_jsp.java:85) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) ...
控制台消息：2005-9-19 9:35:30 org.apache.struts.util.RequestUtils createActionForm严重: Error creating form bean of class app.LogonFormjava.lang.NullPointerException at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:212) at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:292) at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:191)

问题原因：没的将编译的类放到 WEB-INF\classes\app\下面。