werewr342352321df的专栏

<br />在我们web工程的web.xml中设置security-constraint属性（即安全-约束）<br /> 配置如下：<br /> <security-constraint><br /><br /> <web-resource-collection><br /> <web-resource-name>User Basic Auth</web-resource-name><br /> <url-pattern>/*</url-pattern><br />