架构

方案

使用 redis 集中存储，实现分布式集群共享用户信息，这里我们采用第三方开源插件crazycake来实现，pom.xml 引入：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>org.crazycake</groupId>
    <artifactId>shiro-redis</artifactId>
    <version>3.2.3</version>
</dependency>

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配置 application.properties：

# Redis
# 数据库索引（默认为0）
redis.database=0
# 服务器地址 变更为自己的
redis.host=127.0.0.1
# 服务器连接端口
redis.port=6379
# 服务器连接密码，如果不设置密码注释掉即可
# redis.password=
# 连接超时时间（毫秒）
redis.timeout=30000

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本来crazycake插件已经实现了RedisManager，但是参数不可配，这里我们需要自己重写一下：

public class RedisManager extends WorkAloneRedisManager implements IRedisManager {

    private RedisProperties redis;

    private JedisPool jedisPool;

    public RedisManager(RedisProperties redis) {
        this.redis = redis;
    }

    private void init() {
        synchronized(this) {
            if (this.jedisPool == null) {
                this.jedisPool = new JedisPool(this.getJedisPoolConfig(), redis.getHost(), redis.getPort(),
                        redis.getTimeout(), redis.getPassword(), redis.getDatabase());
            }
        }
    }

    @Override
    protected Jedis getJedis() {
        if (this.jedisPool == null) {
            this.init();
        }
        return this.jedisPool.getResource();
    }
}

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参数配置 RedisProperties：

@Data
@ConfigurationProperties(prefix = "redis")
public class RedisProperties {

    private String host;
    private int port;
    private int timeout;
    private String password;
    private int database;
}

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配置 ShiroConfig：

/**
 * Shiro权限配置
 * 一定要配置 @Configuration 和 @EnableConfigurationProperties 注解
 */
@Configuration
@EnableConfigurationProperties({RedisProperties.class})
public class ShiroConfig {

    private RedisProperties redis;

    public ShiroConfig(RedisProperties redis) {
        this.redis = redis;
    }

    @Bean
    public UserRealm userRealm() {
        return new UserRealm();
    }

    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean (SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        shiroFilterFactoryBean.setLoginUrl("/index.html");
        shiroFilterFactoryBean.setUnauthorizedUrl("/403");
        // 拦截器
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<>();
        /**
         * 静态文件
         */
        filterChainDefinitionMap.put("/file/**","anon");
        /**
         * 登录注册
         */
        filterChainDefinitionMap.put("/register.shtml","anon");
        filterChainDefinitionMap.put("/login.shtml","anon");
        /**
         * 管理后台
         */
        filterChainDefinitionMap.put("/sys/**", "roles[admin]");
        filterChainDefinitionMap.put("/**", "authc");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactoryBean;
    }

    @Bean
    public SessionsSecurityManager securityManager() {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(userRealm());
        securityManager.setCacheManager(cacheManager());
        securityManager.setSessionManager(sessionManager());
        return securityManager;
    }
    @Bean
    public DefaultWebSessionManager sessionManager() {
        DefaultWebSessionManager sessionManager = new DefaultWebSessionManager();
        sessionManager.setSessionIdUrlRewritingEnabled(false);
        sessionManager.setSessionDAO(redisSessionDAO());
        return sessionManager;
    }
    @Bean
    public ShiroDialect shiroDialect(){
        return new ShiroDialect();
    }

    /**
     * cacheManager 缓存 redis实现
     * @return
     */
    public RedisCacheManager cacheManager() {
        RedisCacheManager redisCacheManager = new RedisCacheManager();
        redisCacheManager.setRedisManager(redisManager());
        return redisCacheManager;
    }

    /**
     * 配置shiro redisManager
     * @return
     */
    public RedisManager redisManager() {
        RedisManager redisManager = new RedisManager(redis);
        return redisManager;
    }

    /**
     * RedisSessionDAO shiro sessionDao层的实现
     * 原理就是重写 AbstractSessionDAO
     * 有兴趣的小伙伴自行阅读源码
     */
    @Bean
    public RedisSessionDAO redisSessionDAO() {
        RedisSessionDAO redisSessionDAO = new RedisSessionDAO();
        redisSessionDAO.setRedisManager(redisManager());
        return redisSessionDAO;
    }

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