CAS单点登陆 客户端

CAS（Central Authentication Service）是一种单点登录协议，用于实现在多个应用系统中进行统一的身份认证和授权。CAS客户端是指集成CAS协议的应用系统，用于与CAS服务器进行通信并实现单点登录功能。

以下是CAS客户端集成单点登录的代码示例：

// 引入CAS客户端依赖
<dependency>
    <groupId>org.jasig.cas.client</groupId>
    <artifactId>cas-client-core</artifactId>
    <version>3.6.0</version>
</dependency>

// 配置CAS客户端
<bean id="casClient" class="org.jasig.cas.client.authentication.CasClientAuthenticationFilter">
    <property name="casServerLoginUrl" value="http://localhost:8081/cas/login" />
    <property name="serverName" value="http://localhost:8080" />
</bean>

// 配置CAS过滤器
<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://localhost:8081/cas/login</param-value>
    </init-param>
    <init-param>
        <param-name>serverName</param-name>
        <param-value>http://localhost:8080</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>CAS Authentication Filter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

// 配置CAS单点登出过滤器
<filter>
    <filter-name>CAS Logout Filter</filter-name>
    <filter-class>org.jasig.cas.client.session.SingleSignOutFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>CAS Logout Filter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

// 配置CAS请求单点登出过滤器
<filter>
    <filter-name>CAS Request Single Sign Out Filter</filter-name>
    <filter-class>org.jasig.cas.client.session.SingleSignOutFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>CAS Request Single Sign Out Filter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

以上代码是一个Java Web应用中集成CAS客户端的示例，通过配置CAS客户端和相关过滤器，实现与CAS服务器的通信和单点登录功能。