出现这种问题通常是因为没有正确配置Apache Shiro中的授权拦截器。以下是一个示例，可以解决该问题：

1. 在Spring Boot配置文件中添加Shiro相关的bean：

@Configuration public class ShiroConfig {

@Bean
public ShiroFilterChainDefinition shiroFilterChainDefinition() {
    DefaultShiroFilterChainDefinition chainDefinition = new DefaultShiroFilterChainDefinition();
    chainDefinition.addPathDefinition("/login", "anon");
    chainDefinition.addPathDefinition("/logout", "logout");
    chainDefinition.addPathDefinition("/**", "authc");

    return chainDefinition;
}

@Bean
public FilterRegistrationBean shiroFilterRegistration() {
    FilterRegistrationBean registration = new FilterRegistrationBean();
    registration.setFilter(new DelegatingFilterProxy("shiroFilter"));
    registration.setDispatcherTypes(EnumSet.allOf(DispatcherType.class));
    registration.addUrlPatterns("/*");
    registration.setName("shiroFilter");

    return registration;
}

@Bean
public Realm realm() {
    return new MyRealm();
}

@Bean(name = "securityManager")
public SecurityManager securityManager() {
    DefaultWebSecurityManager manager = new DefaultWebSecurityManager();
    manager.setRealm(realm());

    return manager;
}

@Bean
public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor() {
    AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
    advisor.setSecurityManager(securityManager());

    return advisor;
}

}

2. 实现MyRealm类：

public class MyRealm extends AuthorizingRealm {

@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
    Set roles = new HashSet<>();
    roles.add("admin");
    
    SimpleAuthorizationInfo info = new SimpleAuthorizationInfo(roles);
    return info;
}

@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
    UsernamePasswordToken upToken = (UsernamePasswordToken) token;
    String username = upToken.getUsername();
    String password = "password"; // replace with a password lookup

    return new SimpleAuthenticationInfo(username, password.toCharArray(), getName());
}

}

这个示