遇到HTTP Status 500 问题

最新推荐文章于 2025-05-19 15:07:40 发布

原创最新推荐文章于 2025-05-19 15:07:40 发布 · 置顶 · 2.3k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#exception #apache #report #user #jsp #server

本文记录了一次解决HTTP状态码500错误的经历，该错误由JSP页面中的NullPointerException引发，涉及到session变量的赋值操作出现问题。通过查看堆栈跟踪信息可以定位到具体的文件及行号。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: Exception in JSP: /filelist.jsp:96 93: session.putValue("user", user); 94: } 95: items = PetInfor.getAllPets(); 96: for (i = 0; i < items.size(); i++) { 97: PetInfor temp = (PetInfor) items.get(i); 98: 99: id = temp.getID(); Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) root cause java.lang.NullPointerException org.apache.jsp.filelist_jsp._jspService(filelist_jsp.java:150) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs. -------------------------------------------------------------------------------- Apache Tomcat/5.5.17 麻烦大家帮我看看是什么问题，我是刚刚开始做项目的新人，太多东西都不懂，希望大家能指点一下。