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配置 url-pattern 增加需要传递给Spring的扩展名
<servlet> <servlet-name>springframework</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springframework</servlet-name> <url-pattern>/welcome.jsp</url-pattern> <url-pattern>/welcome.html</url-pattern> <url-pattern>*.json</url-pattern> <url-pattern>*.xml</url-pattern> <url-pattern>*.html</url-pattern> </servlet-mapping>