修改web项目web,xml
<web-app> <error-page> <error-code>404</error-code> <location>/404.jsp</location> </error-page> <error-page> <error-code>400</error-code> <location>/404.jsp</location> </error-page> <error-page> <error-code>500</error-code> <location>/404.jsp</location> </error-page> </web-app>
原文：https://www.cnblogs.com/jpl2020/p/13644660.html