本文介绍了spring boot整合CAS Client实现单点登陆验证的示例，分享给大家，也给自己留个笔记，具体如下：
单点登录（ Single Sign-On , 简称 SSO ）是目前比较流行的服务于企业业务整合的解决方案之一， SSO 使得在多个应用系统中，用户只需要 登录一次 就可以访问所有相互信任的应用系统。
CAS Client
负责处理对客户端受保护资源的访问请求，需要对请求方进行身份认证时，重定向到 CAS Server 进行认证。（原则上，客户端应用不再接受任何的用户名密码等 Credentials ）。
实现方式一：使用第三方的starter
1、依赖的jar
<dependency> <groupId>net.unicon.cas</groupId> <artifactId>cas-client-autoconfig-support</artifactId> <version>1.4.0-GA</version> </dependency>
2、增加配置文件
cas.server-url-prefix=http://127.0.0.1 cas.server-login-url=http://127.0.0.1/login cas.client-host-url=http://192.26.4.28:8080 cas.validation-type=CAS
3、开启CAS Client支持
@SpringBootApplication @ComponentScan(basePackages={"com.chhliu.emailservice"}) @EnableCasClient // 开启CAS支持 public class Application extends SpringBootServletInitializer{ public static void main(String[] args) { SpringApplication.run(Application.class, args); } } 通过上面的3步，就可以完成CAS的客户端认证了！
4、扩展
cas.validation-type目前支持3中方式：1、CAS；2、CAS3；3、SAML
其他可用的配置如下：
cas.authentication-url-patterns cas.validation-url-patterns cas.request-wrapper-url-patterns cas.assertion-thread-local-url-patterns cas.gateway cas.use-session cas.redirect-after-validation cas.allowed-proxy-chains cas.proxy-callback-url cas.proxy-receptor-url cas.accept-any-proxy server.context-parameters.renew
具体的含义从名字上就可以很清楚的看出来。
实现方式二：手动配置
我们原来使用CAS Client，需要在web.xml中做如下配置：
<filter> <filter-name>authenticationFilter</filter-name> <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class> <init-param> <param-name>casServerLoginUrl</param-name> <param-value>http://127.0.0.1/login</param-value> </init-param> <init-param> <param-name>serverName</param-name> <param-value>http://192.26.4.28:8080</param-value> </init-param> </filter> <filter-mapping> <filter-name>authenticationFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 该过滤器负责对Ticket的校验工作，必须启用它 --> <filter> <filter-name>validationFilter</filter-name> <filter-class>org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class> <init-param> <param-name>casServerUrlPrefix</param-name> <param-value>http://127.0.0.1</param-value> </init-param> <init-param> <param-name>serverName</param-name> <param-value>http://192.26.4.28:8080</param-value> </init-param> <!-- <init-param> <param-name>redirectAfterValidation</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>useSession</param-name> <param-value>true</param-value> </init-param> --> </filter> <filter-mapping> <filter-name>validationFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 该过滤器负责实现HttpServletRequest请求的包裹， 比如允许开发者通过HttpServletRequest的getRemoteUser()方法获得SSO登录用户的登录名，可选配置。 --> <filter> <filter-name>httpServletRequestWrapperFilter</filter-name> <filter-class>org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class> </filter> <filter-mapping> <filter-name>httpServletRequestWrapperFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
所以，我们手动配置的时候，需要手动配置上面xml中对应的Filter，代码如下：
@Configuration @Component public class CasConfigure { @Bean public FilterRegistrationBean authenticationFilterRegistrationBean() { FilterRegistrationBean authenticationFilter = new FilterRegistrationBean(); authenticationFilter.setFilter(new AuthenticationFilter()); Map<String, String> initParameters = new HashMap<String, String>(); initParameters.put("casServerLoginUrl", "http://127.0.0.1/login"); initParameters.put("serverName", "http://192.26.4.28:8080"); authenticationFilter.setInitParameters(initParameters); authenticationFilter.setOrder(2); List<String> urlPatterns = new ArrayList<String>(); urlPatterns.add("/*");// 设置匹配的url authenticationFilter.setUrlPatterns(urlPatterns); return authenticationFilter; } @Bean public FilterRegistrationBean ValidationFilterRegistrationBean(){ FilterRegistrationBean authenticationFilter = new FilterRegistrationBean(); authenticationFilter.setFilter(new Cas20ProxyReceivingTicketValidationFilter()); Map<String, String> initParameters = new HashMap<String, String>(); initParameters.put("casServerUrlPrefix", "http://127.0.0.1"); initParameters.put("serverName", "http://192.26.4.28:8080"); authenticationFilter.setInitParameters(initParameters); authenticationFilter.setOrder(1); List<String> urlPatterns = new ArrayList<String>(); urlPatterns.add("/*");// 设置匹配的url authenticationFilter.setUrlPatterns(urlPatterns); return authenticationFilter; } @Bean public FilterRegistrationBean casHttpServletRequestWrapperFilter(){ FilterRegistrationBean authenticationFilter = new FilterRegistrationBean(); authenticationFilter.setFilter(new HttpServletRequestWrapperFilter()); authenticationFilter.setOrder(3); List<String> urlPatterns = new ArrayList<String>(); urlPatterns.add("/*");// 设置匹配的url authenticationFilter.setUrlPatterns(urlPatterns); return authenticationFilter; } @Bean public FilterRegistrationBean casAssertionThreadLocalFilter(){ FilterRegistrationBean authenticationFilter = new FilterRegistrationBean(); authenticationFilter.setFilter(new AssertionThreadLocalFilter()); authenticationFilter.setOrder(4); List<String> urlPatterns = new ArrayList<String>(); urlPatterns.add("/*");// 设置匹配的url authenticationFilter.setUrlPatterns(urlPatterns); return authenticationFilter; } } 通过上面的配置，也可以完成CAS Client的认证
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。