Cas Server configuration
Create a src/main/resources folder, find the file in the WEB-INF of cas, then modify the html file page, and add a new button. 
Find the messages ABCD cn.properties file under WEB-INF and add a message, which is the text of the registration button.
Then add it under the messages.properties file
Configuration of subsystem
Configuring filters in the web.xml file
Subsystem configuration
<filter> <filter-name>CAS Authentication Filter</filter-name> <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class> <init-param> <param-name>casServerLoginUrl</param-name> <param-value>http://IP: Port No. / CAS / login < / param value > </init-param> <init-param> <param-name>casServerLogoutUrl</param-name> <param-value>http://IP: Port No. / CAS < / param value > </init-param> <init-param> <param-name>serverName</param-name> <param-value>http://IP: port number / < / param value > </init-param>
**<init-param> <param-name>ignorePattern</param-name> <param-value>users/registeredAccount|users/add</param-value> </init-param> </filter>** <filter> <!-- Used for ticket Authentication --> <filter-name>CAS Validation Filter</filter-name> <filter-class>org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class> <init-param> <!-- ticket The authentication address. The intranet address is configured here --> <param-name>casServerUrlPrefix</param-name> <param-value>http://IP: Port No. / CAS < / param value > </init-param> <init-param> <param-name>serverName</param-name> <param-value>http://IP: port number / < / param value > </init-param> <init-param> <param-name>redirectAfterValidation</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>acceptAnyProxy</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>useSession</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter>
<filter-name>CAS HttpServletRequest Wrapper Filter</filter-name> <filter-class>org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class> </filter>
<filter-name>CAS Assertion Thread Local Filter</filter-name> <filter-class>org.jasig.cas.client.util.AssertionThreadLocalFilter</filter-class> </filter> <filter-mapping> <filter-name>CAS Single Sign Out Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>CAS Authentication Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>CAS Validation Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>CAS HttpServletRequest Wrapper Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>CAS Assertion Thread Local Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class> </listener> <!-- ======================== Single sign on/End of logout ======================== -->
Note: if you choose to register in the subsystem, you need to set cas filter to ignore the url of the registration page and the url of the registration submission jump;
User defined login verification in subsystem
1. Create a class to implement the PasswordEncoder interface
2. Configure mongodb settings in the application.properties file
Configuration complete! I use version 5.2.6.