The method getJspApplicationContext (ServletContext) is undefined for the type JspFactory, contextundefined

The method getJspApplicationContext (ServletContext) is undefined for the type JspFactory, contextundefined

The method getJspApplicationContext (ServletContext) is undefined for the type JspFactory

This is because some packages in the project are the same as those of the Tomcat server, and the version is lower than that of the Tomcat server. However, when running, the Tomcat server loads the packages in the project first, the solution is to copy duplicate packages from the Tomcat server to the project.