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使用SpringBoot集成CAS、应用场景和示例代码

news 2025/7/21 19:17:42

Spring Boot与CAS集成可以为应用程序提供单点登录（SSO）功能，CAS（Central Authentication Service）是一种单点登录协议，用于通过一个中央认证服务器来进行认证，从而使用户可以通过一次登录访问多个应用程序。

概述

集成CAS到Spring Boot应用程序中，通常需要以下步骤：

配置CAS客户端，使其能够与CAS服务器进行通信。
配置Spring Security，以便应用程序能够使用CAS进行身份验证。
编写必要的配置和代码，确保CAS和Spring Security协同工作。

应用场景

企业内部系统：统一企业内部系统的登录认证，用户只需登录一次即可访问多个应用。
教育机构：学生和教职工可以通过CAS进行统一登录，方便访问多个教育相关的应用。
各种Web应用：任何需要单点登录的Web应用场景，CAS都可以作为解决方案。

示例代码

以下是一个简单的Spring Boot应用程序，集成CAS进行单点登录。

依赖配置

确保在pom.xml中添加必要的依赖项：

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-security</artifactId>
</dependency><dependency><groupId>org.springframework.security</groupId><artifactId>spring-security-cas</artifactId>
</dependency><dependency><groupId>org.jasig.cas.client</groupId><artifactId>cas-client-core</artifactId><version>3.6.0</version>
</dependency>

CAS客户端配置

在application.properties（或application.yml）中配置CAS服务器和客户端信息：

# CAS Server URL
cas.server.url.prefix=https://your-cas-server.com/cas
cas.server.login.url=${cas.server.url.prefix}/login
cas.server.logout.url=${cas.server.url.prefix}/logout# CAS Client
cas.client.host-url=http://localhost:8080
cas.client.login-url=${cas.server.login.url}?service=${cas.client.host-url}/login/cas
cas.client.logout-url=${cas.server.logout.url}?service=${cas.client.host-url}/logout# Application properties
server.port=8080

Spring Security配置

创建一个配置类来配置Spring Security与CAS集成：

import org.springframework.context.annotation.Configuration;
import org.springframework.security.cas.ServiceProperties;
import org.springframework.security.cas.authentication.CasAssertionAuthenticationToken;
import org.springframework.security.cas.authentication.CasAuthenticationProvider;
import org.springframework.security.cas.web.CasAuthenticationEntryPoint;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.AuthenticationUserDetailsService;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {@Overrideprotected void configure(HttpSecurity http) throws Exception {http.authorizeRequests().antMatchers("/").permitAll().anyRequest().authenticated().and().logout().logoutSuccessUrl("/").invalidateHttpSession(true).deleteCookies("JSESSIONID").and().addFilterBefore(casLogoutFilter(), LogoutFilter.class).exceptionHandling().authenticationEntryPoint(casAuthenticationEntryPoint());}private CasAuthenticationEntryPoint casAuthenticationEntryPoint() {CasAuthenticationEntryPoint entryPoint = new CasAuthenticationEntryPoint();entryPoint.setLoginUrl("https://your-cas-server.com/cas/login");entryPoint.setServiceProperties(serviceProperties());return entryPoint;}private ServiceProperties serviceProperties() {ServiceProperties serviceProperties = new ServiceProperties();serviceProperties.setService("http://localhost:8080/login/cas");serviceProperties.setSendRenew(false);return serviceProperties;}private LogoutFilter casLogoutFilter() {String logoutUrl = "https://your-cas-server.com/cas/logout";CasLogoutFilter filter = new CasLogoutFilter(logoutUrl, new SecurityContextLogoutHandler());filter.setFilterProcessesUrl("/logout");return filter;}// CAS Authentication Provider@Beanpublic CasAuthenticationProvider casAuthenticationProvider() {CasAuthenticationProvider provider = new CasAuthenticationProvider();provider.setAuthenticationUserDetailsService(casUserDetailsService());provider.setServiceProperties(serviceProperties());provider.setTicketValidator(new Cas30ServiceTicketValidator("https://your-cas-server.com/cas"));provider.setKey("CAS_PROVIDER_LOCALHOST_8080");return provider;}// User Details Service for CAS Authentication@Beanpublic AuthenticationUserDetailsService<CasAssertionAuthenticationToken> casUserDetailsService() {return token -> {String username = token.getName();// Dummy implementation to load user details, replace with your actual logicUserDetails userDetails = loadUserByUsername(username);return userDetails;};}// Dummy UserDetailsService (replace with your actual implementation)private UserDetails loadUserByUsername(String username) {if ("user".equals(username)) {return new org.springframework.security.core.userdetails.User(username, "password", true, true, true, true,AuthorityUtils.createAuthorityList("ROLE_USER"));} else {throw new UsernameNotFoundException("User not found.");}}
}

在上面的代码中：