过滤器mapping报错

在web.xml中filter-mapping报错：提示信息如下

Multiple annotations found at this line:

- Invalid element name:

- filter-mapping

One of the following is expected:

- async-supported

- init-param

Error indicated by:

{http://xmlns.jcp.org/xml/ns/javaee}

with code:

- cvc-complex-type.2.4.a:

Invalid content was found starting

with element 'filter-mapping'. One of

'{"http://xmlns.jcp.org/xml/ns/

javaee":async-supported, "http://

xmlns.jcp.org/xml/ns/javaee":init-

param}' is expected.

慕UI1578266 2020-06-07

源自：过滤器 1-3 开发第一个过滤器

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2回答

好帮手慕阿园回答被采纳获得+3积分 2020-06-07 18:27:40

同学你好，同学的 </filter-mapping>标签写错了位置，同学写在了 <filter>标签中

应该是在 <filter>标签的外面，
修改后如下

如果我的回答解决了你的疑惑，请采纳，祝学习愉快~

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好帮手慕阿园 2020-06-07 17:43:28

同学你好，建议同学把web.xml中的代码粘贴到问答区，方便老师定位问题

祝学习愉快

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提问者慕UI1578266 #1

?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>first-filter</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>MyFirstFilter</filter-name> <filter-class>com.imooc.filter.MyFirstFilter</filter-class> <filter-mapping> <filter-name>MyFirstFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </filter> </web-app>

2020-06-07 17:48:54
提问者慕UI1578266 #2

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>first-filter</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>MyFirstFilter</filter-name> <filter-class>com.imooc.filter.MyFirstFilter</filter-class> <filter-mapping> <filter-name>MyFirstFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </filter> </web-app>

2020-06-07 17:49:35