Question

我正在用Java Web JSP Struts 1编写我的第一个helloworld Web projet。我已尽力解决此HTTP Status 500错误。任何帮助将不胜感激。这是我的githud代码源：https://github.com/paeltc/Struts1Demo1。

这是我得到的答复：

HTTP Status 500 – Internal Server Error
Type Exception Report

Message java.lang.NullPointerException

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: java.lang.NullPointerException
    org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286)
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause

java.lang.NullPointerException
    org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:289)
    org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:357)
    org.apache.struts.chain.commands.CreateActionForm.execute(CreateActionForm.java:92)
    org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
    org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
    org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
    org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
    org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
    org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Note The full stack trace of the root cause is available in the server logs.

我正在使用Apache Tomcat / 9.0.27

Answer 1

笨拙的软件包名称给您带来了麻烦。

查看您的struts-config.xml文件（该文件应发布在您的问题中；问题必须尽可能独立存在）：

<form-bean name="helloStruts1Form" type="com.tpe.dev.form.HelloStruts1Form" />

现在查看代码中唯一名为HelloStruts1Form的内容：

package com.dev.tpe.form;

看到问题了吗？

请参阅How to Ask页。

Java Struts 1 HTTP状态500

1 个答案: