web.xml???Servlet4.0????????????????????????
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?????????XML ????????? xmlns ati instance isp version javaee location
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
????????? xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
????????? xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
????????????????????? ??? http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
??????version="4.0">
??????<display-name>website name</display-name>
??????<welcome-file-list>
????????????<welcome-file>index.html</welcome-file>
????????????<welcome-file>index.jsp</welcome-file>
??????</welcome-file-list>
</web-app>
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No grammar constraints (DTD or XML Schema) referenced in the document.
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