然后报500错误!这是什么原因？图片描述
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Visual inspection should indicate that necessary jar files are missing, such as jstl-1.x.jar; or that the jar package corresponding to jstl is not included in WEB-INF/lib/ and other paths.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Visual inspection should indicate that necessary jar files are missing, such as jstl-1.x.jar; or that the jar package corresponding to jstl is not included in WEB-INF/lib/ and other paths.