您需要将jstl标记库添加到WEB-INF/lib文件夹中.如果没有，则创建lib文件夹.

You need to add the jstl tag library to the WEB-INF/lib folder. if you don't have one you make the lib folder.

有关jstl 此处

也将其添加到您的Maven依赖项中

Also add it to your maven dependencies