web.xml中的security-constraint_web.xml security-constraint

<security-constraint>
		<web-resource-collection>
			<url-pattern>/*</url-pattern>
			<http-method>PUT</http-method>
			<http-method>SEARCH</http-method>
			<http-method>DELETE</http-method>
			<http-method>COPY</http-method>
			<http-method>MOVE</http-method>
			<http-method>PROPFIND</http-method>
			<http-method>PROPPATCH</http-method>
			<http-method>MKCOL</http-method>
			<http-method>LOCK</http-method>
			<http-method>UNLOCK</http-method>
			<http-method>HEAD</http-method>
			<http-method>OPTIONS</http-method>
			<http-method>TRACE</http-method>
			<http-method>PATCH</http-method>
		</web-resource-collection>
		<!-- <auth-constraint>
			<role-name>All Role</role-name>
		</auth-constraint> -->
	</security-constraint>
	<login-config>
		<auth-method>BASIC</auth-method>
	</login-config>

其中的，

<auth-constraint>
			<role-name>All Role</role-name>
		</auth-constraint>

如果有元素标签auth-constraint时，内容为空时则禁止所有资源访问，无此元素时则security-constraint不起作用

详见其他地方的说明