老师帮忙看看我跟着视频敲的这个mapping映射为啥报错啊

报错信息：

Multiple annotations found at this line:

- cvc-complex-type.2.4.a: Invalid content was found starting with element 'servlet-mapping'. One of '{"http://

xmlns.jcp.org/xml/ns/javaee":init-param, "http://xmlns.jcp.org/xml/ns/javaee":load-on-startup, "http://xmlns.jcp.org/

xml/ns/javaee":enabled, "http://xmlns.jcp.org/xml/ns/javaee":async-supported, "http://xmlns.jcp.org/xml/ns/

javaee":run-as, "http://xmlns.jcp.org/xml/ns/javaee":security-role-ref, "http://xmlns.jcp.org/xml/ns/javaee":multipart-

config}' is expected.

- <servlet-mapping>