错误描述:

  The content of element type "web-app" must match"(icon?,display-name?,description?,distributable?,context-param*,filter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welcome-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,security-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)".

  web.xml头部配置:

  < xml version="1.0" encoding="UTF-8" >
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "">
<web-app>

  原因分析:

  1、文档内容标签顺序不符合web-app_2_3.dtd规范。

  2、这是由于web-app标签里面的子标签顺序不对,只需按照提示的顺序修改标签顺序就可以了。

  解决方案:

  1:严格按照提示上的顺序排列。

  2:删除或注释掉web.xml的中如下这段内容:

  <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">

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