jsp-api.jar文件与tomcat中同名包冲突出现 java.lang.NullPointerException

最新推荐文章于 2025-01-21 01:19:57 发布

Bolt_li

最新推荐文章于 2025-01-21 01:19:57 发布

阅读量2.6k

点赞数

CC 4.0 BY-SA版权

文章标签： eclipse java exception tomcat

本文链接：https://blog.youkuaiyun.com/u014010798/article/details/42674645

本文详细介绍了如何解决在项目中因jsp-api.jar文件与tomcat同名包冲突导致的NullPointerException问题，通过使用add External JAPs方式成功解决。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

type Exception report

message java.lang.NullPointerException

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

exception

org.apache.jasper.JasperException: java.lang.NullPointerException org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:538) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370) 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:723)

root cause

java.lang.NullPointerException org.apache.jsp.login_jsp._jspInit(login_jsp.java:22) org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52) org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:164) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340) 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:723)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.39 logs.

原因是我把 jsp-api.jar文件复制到了项目--WEB-INF-lib下面与tomcat中同名包冲突。