tomcat 自动跳转到HTTPS

把下面内容插入到 项目web.xml 文件中

<security-constraint>
	<web-resource-collection>
		<web-resource-name>Getssl</web-resource-name>
		<url-pattern>/*</url-pattern>
	</web-resource-collection>
	<user-data-constraint>
		<transport-guarantee>CONFIDENTIAL</transport-guarantee>
	</user-data-constraint>
</security-constraint>