springboot如何集成cas

要在Spring Boot中集成CAS，需要进行以下步骤：

1. 首先，需要在pom.xml文件中添加CAS客户端依赖：

<dependency>
    <groupId>org.jasig.cas.client</groupId>
    <artifactId>cas-client-core</artifactId>
    <version>3.6.1</version>
</dependency>

2. 在application.properties中添加CAS客户端的配置信息：

cas.server.url.prefix=https://cas.example.com:8443/cas
cas.server.login.url=https://cas.example.com:8443/cas/login
cas.server.logout.url=https://cas.example.com:8443/cas/logout
cas.client.server.name=http://localhost:8080

3. 创建一个CAS认证过滤器：

public class CasAuthenticationFilter extends AbstractCasAuthenticationFilter {
    @Override
    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {
        super.successfulAuthentication(request, response, chain, authResult);
        // 在此处添加用户登录成功后的逻辑
    }
}

4. 配置Spring Security，将CAS认证过滤器添加到过滤器链中：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private CasAuthenticationFilter casAuthenticationFilter;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .antMatchers("/", "/home").permitAll()
                .anyRequest().authenticated()
                .and()
                .logout().logoutSuccessUrl("/")
                .and()
                .addFilter(casAuthenticationFilter);
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.authenticationProvider(casAuthenticationProvider());
    }

    @Bean
    public CasAuthenticationProvider casAuthenticationProvider() {
        CasAuthenticationProvider provider = new CasAuthenticationProvider();
        provider.setAuthenticationUserDetailsService(new UserDetailsByNameServiceWrapper<>(userDetailsService()));
        provider.setServiceProperties(serviceProperties());
        provider.setTicketValidator(cas30ServiceTicketValidator());
        provider.setKey("casAuthProviderKey");
        return provider;
    }

    @Bean
    public ServiceProperties serviceProperties() {
        ServiceProperties serviceProperties = new ServiceProperties();
        serviceProperties.setService("http://localhost:8080");
        serviceProperties.setSendRenew(false);
        return serviceProperties;
    }

    @Bean
    public Cas30ServiceTicketValidator cas30ServiceTicketValidator() {
        return new Cas30ServiceTicketValidator("https://cas.example.com:8443/cas");
    }

    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}

以上就是Spring Boot集成CAS的基本步骤。需要注意的是，CAS的配置信息需要根据实际情况进行修改。同时，需要在CAS服务器上进行配置，将客户端的信息添加到CAS服务器中。