如何将CAS认证与Spring Security集成？

我已将 spring security 集成到我的项目中，并且之前使用 hibernate 验证用户详细信息。现在我必须使用 CAS 来完成它。 这是我当前的 Spring security.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
    xmlns:beans="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
        http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/security 
        http://www.springframework.org/schema/security/spring-security-3.1.xsd
        ">



    <global-method-security pre-post-annotations="enabled" />

    <http pattern="/css/**" security="none"/>
    <http pattern="/images/**" security="none"/>
    <http pattern="/js/**" security="none"/>
    <http pattern="/index.jsp" security="none"/>
    <http pattern="/app/addNewUser.json" security="none"/>
    <http pattern="/dbcomplogin.jsp" security="none"/>
    <http pattern="/loggedout.jsp" security="none"/>

    <http use-expressions="true">
        <!--
             Allow all other requests. In a real application you should
             adopt a whitelisting approach where access is not allowed by default
          -->
        <intercept-url pattern="/**" access="isAuthenticated()" />
        <form-login login-page='/dbcomplogin.jsp'
          authentication-failure-url="/dbcomplogin.jsp?login_error=1"
          default-target-url="/index.jsp" />
        <logout logout-success-url="/loggedout.jsp" delete-cookies="JSESSIONID"/>
        <remember-me />

    </http>

    <beans:bean id="myUserService" class="com.tcs.ceg.services.impl.UserServiceImpl" />
    <authentication-manager>
    <authentication-provider user-service-ref="myUserService" />
    </authentication-manager>

</beans:beans>

在 UserServiceImpl 类“loadUserByUsername”方法中，我使用 Hibernate 调用从数据库获取用户详细信息，并且返回用户名、密码（如果它们存在于数据库中）。

但现在我必须使用 CAS 服务器来做到这一点。请告诉我我需要在 spring-security.xml 中更改哪些内容，以便如果用户未经过身份验证，将打开 CAS 服务器的登录页面，并且单击注销时将发生单一注销并显示 CAS 的注销页面服务器将打开。 我是 CAS 和 Spring Security 的新手，请帮助我。

查看用于导入 beans 命名空间的别名。如果您的 xml 配置为 xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 将其与别名为 beans:bean