shiro是基于过滤器机制的，只要重写不同模块下的过滤器就可以达到自己想要的效果。

1、重写方法

public class LoginFilter extends UserFilter { 

    /** * 这个方法用于处理未登录时页面重定向的逻辑 * 因此，只要进入了这个方法，就意味着登录失效了 * 我们只需要在这个方法里，给前端返回一个登录失效的状态码即可 * @param request * @param response * @throws IOException */
    @Override
    protected void redirectToLogin(ServletRequest request, ServletResponse response) throws IOException { 
        response.setContentType("application/json; charset=utf-8");
        // 自定义返回内容
        response.getWriter().write(JSONObject.toJSONString(new MyResponse<>(ResultEnum.NOT_LOGIN)));
    }
}

配置到shiro中

@Configuration
public class ShiroConfig { 

    /** * 创建ShiroFilterFactoryBean */
    @Bean("shiroFilterFactoryBean")
    public ShiroFilterFactoryBean shiroFilterFactoryBean(SecurityManager securityManager) { 
        // 设置安全管理器
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(securityManager);
// 配置filter，解决认证失败返回login.jsp的问题
        Map<String, Filter> filters = shiroFilterFactoryBean.getFilters();
        filters.put("authc",new LoginFilter());

        /** * 访问规则配置 * anon：无需认证可以访问 * authc：必须认证才能访问 * user：如果使用rememberMe的功能可以直接访问 * perms：该资源必须得到权限才可以访问 * role：该资源必须得到角色权限才可以访问 */
        Map<String, String> filterMap = Maps.newHashMap();
        filterMap.put("/*/login", "anon");
        filterMap.put("/*/register", "anon");
        filterMap.put("/**", "authc");

        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterMap);
        return shiroFilterFactoryBean;
    }

    /** * 注入DefaultSecurityManager */
    @Bean
    public SecurityManager securityManager(AdminRealm adminRealm) { 
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        // 关联realm
        securityManager.setRealm(adminRealm);
        return securityManager;
    }

    /** * 注入Realm */
    @Bean
    public AdminRealm adminRealm() { 
        return new AdminRealm();
    }

    /** * 以下三个Bean是解决Shiro注解不生效问题，官方给出，不要问为什么 * @return */
    @Bean
    public static LifecycleBeanPostProcessor lifecycleBeanPostProcessor() { 
        return new LifecycleBeanPostProcessor();
    }

    @Bean
    @DependsOn("lifecycleBeanPostProcessor")
    public static DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() { 
        DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        advisorAutoProxyCreator.setProxyTargetClass(true);
        return advisorAutoProxyCreator;
    }

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

    }
}

shiro过滤器类