<security-constraint>
<web-resource-collection>
<web-resource-name>myAuth</web-resource-name>
<url-pattern>/druid/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>manager-gui</role-name>
</auth-constraint>
</security-constraint>
<login-config>
<auth-method>BASIC</auth-method>
<realm-name>druid</realm-name>
</login-config>
auth-method 有：BASIC,FORM
如果是BASIC则默认的,FORM的还需配置login.jsp与error.jsp