详解spring boot配置单点登录

<properties>  <shiro.version>1.2.4</shiro.version> </properties><dependencies><!--Apache Shiro -->  <dependency>   <groupId>org.apache.shiro</groupId>   <artifactId>shiro-spring</artifactId>   <version>${shiro.version}</version>  </dependency>  <dependency>   <groupId>org.apache.shiro</groupId>   <artifactId>shiro-ehcache</artifactId>   <version>${shiro.version}</version>  </dependency>  <dependency>   <groupId>org.apache.shiro</groupId>   <artifactId>shiro-cas</artifactId>   <version>${shiro.version}</version>  </dependency></dependencies>

shiro.cas=https://cas.xxx.com # 这是CAS服务的地址shiro.server=http://127.0.0.1:8080 # 自己应用的地址，测试使用127即可

@Configurationpublic class ShiroCasConfiguration { private static final String casFilterUrlPattern = "/shiro-cas"; @Bean public FilterRegistrationBean filterRegistrationBean() {  FilterRegistrationBean filterRegistration = new FilterRegistrationBean();  filterRegistration.setFilter(new DelegatingFilterProxy("shiroFilter"));  filterRegistration.addInitParameter("targetFilterLifecycle", "true");  filterRegistration.setEnabled(true);  filterRegistration.addUrlPatterns("/*");  return filterRegistration; } @Bean(name = "lifecycleBeanPostProcessor") public LifecycleBeanPostProcessor getLifecycleBeanPostProcessor() {  return new LifecycleBeanPostProcessor(); } @Bean(name = "securityManager") public DefaultWebSecurityManager getDefaultWebSecurityManager(@Value("${shiro.cas}") String casServerUrlPrefix,                 @Value("${shiro.server}") String shiroServerUrlPrefix) {  DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();  CasRealm casRealm = new CasRealm();  casRealm.setDefaultRoles("ROLE_USER");  casRealm.setCasServerUrlPrefix(casServerUrlPrefix);  casRealm.setCasService(shiroServerUrlPrefix + casFilterUrlPattern);  securityManager.setRealm(casRealm);  securityManager.setCacheManager(new MemoryConstrainedCacheManager());  securityManager.setSubjectFactory(new CasSubjectFactory());  return securityManager; } private void loadShiroFilterChain(ShiroFilterFactoryBean shiroFilterFactoryBean) {  Map<String, String> filterChainDefinitionMap = new LinkedHashMap<>();  filterChainDefinitionMap.put(casFilterUrlPattern, "casFilter");  filterChainDefinitionMap.put("/login", "anon");  filterChainDefinitionMap.put("/bower_components/**", "anon");//可以将不需要拦截的静态文件目录加进去  filterChainDefinitionMap.put("/logout","logout");  filterChainDefinitionMap.put("/**", "authc");  shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap); } /**  * CAS Filter  */ @Bean(name = "casFilter") public CasFilter getCasFilter(@Value("${shiro.cas}") String casServerUrlPrefix,         @Value("${shiro.server}") String shiroServerUrlPrefix) {  CasFilter casFilter = new CasFilter();  casFilter.setName("casFilter");  casFilter.setEnabled(true);  String loginUrl = casServerUrlPrefix + "/login?service=" + shiroServerUrlPrefix + casFilterUrlPattern;  casFilter.setFailureUrl(loginUrl);  return casFilter; } @Bean(name = "shiroFilter") public ShiroFilterFactoryBean getShiroFilterFactoryBean(DefaultWebSecurityManager securityManager,               CasFilter casFilter,               @Value("${shiro.cas}") String casServerUrlPrefix,               @Value("${shiro.server}") String shiroServerUrlPrefix) {  ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();  shiroFilterFactoryBean.setSecurityManager(securityManager);  String loginUrl = casServerUrlPrefix + "/login?service=" + shiroServerUrlPrefix + casFilterUrlPattern;  shiroFilterFactoryBean.setLoginUrl(loginUrl);  shiroFilterFactoryBean.setSuccessUrl("/");  Map<String, Filter> filters = new HashMap<>();  filters.put("casFilter", casFilter);  LogoutFilter logoutFilter = new LogoutFilter();  logoutFilter.setRedirectUrl(casServerUrlPrefix + "/logout?service=" + shiroServerUrlPrefix);  filters.put("logout",logoutFilter);  shiroFilterFactoryBean.setFilters(filters);  loadShiroFilterChain(shiroFilterFactoryBean);  return shiroFilterFactoryBean; }}

public String getUsername() {  Subject subject = SecurityUtils.getSubject();  if (subject == null || subject.getPrincipals() == null) {   return DEFAULTUSER;  }  return (String) subject.getPrincipals().getPrimaryPrincipal(); }