java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config

缺少jstl标签库，jstl.jar，

The problem is it miss jstl jar. By default, Tomcat container doesn’t contain any jstl library. To fix it, declares jstl.jar in your Maven pom.xml file.

<dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version><scope>runtime</scope></dependency>