nginx+springboot+shiro+redis实现分布式session共享，同一项目部署多份实现负载均衡

蔚落 2023-06-11 06:26 18阅读 0赞

上篇文章写道了基本的keepalived+nginx高可用，用兴趣的伙伴可以参考我上篇文章！

[centos7+keepalived+nginx+tomcat+springboot实现nginx+tomcat高可用以及故障邮件通知][centos7_keepalived_nginx_tomcat_springboot_nginx_tomcat]

一个项目部署多份后，必然会出现session问题，因为每个tomcat的session是独立的，要让他们是一致的，就需要做到session共享，在springboot+shiro项目中tomcat的session是交给shiro管理的，默认情况下,shiro也是在内存中独立处理session，为了实现session共享，需要把Session交给redis来管理，这样所有的项目都连接一个redis的话，那session就是共享的了

这篇文章写得是shiro连接单机版redis，我贴出后来写得shiro连接redis哨兵模式高可用集群的链接

[springboot+shiro+redis实现高可用集群，shiro连接哨兵redis集群，springboot配置方法，接上篇文章][springboot_shiro_redis_shiro_redis_springboot]

> 说到这里，其他的应用都作了高可用，redis当然也要做，下面的文章我就会把我做redis高可用的方法也贴出来，一步一步往上爬，redis这关攻破之后就是数据库高可用，用的mysql比较多，就用mysql做例子吧

先说shiro分布式session：pom文件添加依赖如下

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-redis</artifactId>
            </dependency>
    <dependency>
                <groupId>org.crazycake</groupId>
                <artifactId>shiro-redis</artifactId>
                <version>2.4.2.1-RELEASE</version>
            </dependency>

其他的普通的包我就不贴了，主要是比一般使用shiro多这两个包

下面是配置项

多一个sessionDao

package com.huohua.common.config;
    import java.io.Serializable;
    import java.util.Collection;
    import java.util.concurrent.TimeUnit;
    
    import org.apache.shiro.session.Session;
    import org.apache.shiro.session.UnknownSessionException;
    import org.apache.shiro.session.mgt.eis.AbstractSessionDAO;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.stereotype.Service;
    @Service
    public class RedisSessionDao extends AbstractSessionDAO{
    	// Session超时时间，单位为毫秒 
    	  private long expireTime = 120000; 
    	  
    	  @Autowired
    	  private RedisTemplate redisTemplate;
    	  
    	  public RedisSessionDao() { 
    	    super(); 
    	  } 
    	  
    	  public RedisSessionDao(long expireTime, RedisTemplate redisTemplate) { 
    	    super(); 
    	    this.expireTime = expireTime; 
    	    this.redisTemplate = redisTemplate; 
    	  } 
    	  
    	  @Override // 更新session 
    	  public void update(Session session) throws UnknownSessionException { 
    	    System.out.println("===============update================"); 
    	    if (session == null || session.getId() == null) { 
    	      return; 
    	    } 
    	    session.setTimeout(expireTime); 
    	    redisTemplate.opsForValue().set(session.getId(), session, expireTime, TimeUnit.MILLISECONDS); 
    	  } 
    	  
    	  @Override // 删除session 
    	  public void delete(Session session) { 
    	    System.out.println("===============delete================"); 
    	    if (null == session) { 
    	      return; 
    	    } 
    	    redisTemplate.opsForValue().getOperations().delete(session.getId()); 
    	  } 
    	  
    	  @Override// 获取活跃的session，可以用来统计在线人数，如果要实现这个功能，可以在将session加入redis时指定一个session前缀，统计的时候则使用keys("session-prefix*")的方式来模糊查找redis中所有的session集合 
    	  public Collection<Session> getActiveSessions() { 
    	    System.out.println("==============getActiveSessions================="); 
    	    return redisTemplate.keys("*"); 
    	  } 
    	  
    	  @Override// 加入session 
    	  protected Serializable doCreate(Session session) { 
    	    System.out.println("===============doCreate================"); 
    	    Serializable sessionId = this.generateSessionId(session); 
    	    this.assignSessionId(session, sessionId); 
    	  
    	    redisTemplate.opsForValue().set(session.getId(), session, expireTime, TimeUnit.MILLISECONDS); 
    	    return sessionId; 
    	  } 
    	  
    	  @Override// 读取session 
    	  protected Session doReadSession(Serializable sessionId) { 
    	    System.out.println("==============doReadSession================="); 
    	    if (sessionId == null) { 
    	      return null; 
    	    } 
    	    return (Session) redisTemplate.opsForValue().get(sessionId); 
    	  } 
    	  
    	  public long getExpireTime() { 
    	    return expireTime; 
    	  } 
    	  
    	  public void setExpireTime(long expireTime) { 
    	    this.expireTime = expireTime; 
    	  } 
    	  
    	  public RedisTemplate getRedisTemplate() { 
    	    return redisTemplate; 
    	  } 
    	  
    	  public void setRedisTemplate(RedisTemplate redisTemplate) { 
    	    this.redisTemplate = redisTemplate; 
    	  } 
    }

shiroConfig类

package com.huohua.common.config;
    
    import com.huohua.modules.sys.shiro.UserRealm;
    import org.apache.shiro.mgt.SecurityManager;
    import org.apache.shiro.session.mgt.SessionManager;
    import org.apache.shiro.spring.LifecycleBeanPostProcessor;
    import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
    import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
    import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
    import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
    import org.apache.shiro.web.session.mgt.ServletContainerSessionManager;
    import org.crazycake.shiro.RedisManager;
    import org.crazycake.shiro.RedisSessionDAO;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import java.util.LinkedHashMap;
    import java.util.Map;
    
    /**
     * Shiro的配置文件
     */
    @Configuration
    public class ShiroConfig {
    
        @Bean
        public DefaultWebSessionManager sessionManager(@Value("${globalSessionTimeout:3600}") long globalSessionTimeout
    , RedisManager c){
            DefaultWebSessionManager sessionManager = new DefaultWebSessionManager();
            sessionManager.setSessionValidationSchedulerEnabled(true);
            sessionManager.setSessionIdUrlRewritingEnabled(false);
            sessionManager.setSessionValidationInterval(globalSessionTimeout * 1000);
            sessionManager.setGlobalSessionTimeout(globalSessionTimeout * 1000);
            sessionManager.setSessionDAO(redisSessionDAO(c));
            return sessionManager;
        }
        @ConfigurationProperties(prefix="spring.redis")
        @Bean
        public RedisManager redisManager() {
            return new RedisManager();
        }
        @Bean
        public RedisSessionDAO redisSessionDAO(RedisManager redisManager) {
            RedisSessionDAO redisSessionDAO = new RedisSessionDAO();
            redisSessionDAO.setRedisManager(redisManager);
            return redisSessionDAO;
        }
    
        @Bean("securityManager")
        public SecurityManager securityManager(UserRealm userRealm, SessionManager sessionManager) {
            DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
            securityManager.setRealm(userRealm);
            securityManager.setSessionManager(sessionManager);
            securityManager.setRememberMeManager(null);
    
            return securityManager;
        }
    
    
        @Bean("shiroFilter")
        public ShiroFilterFactoryBean shiroFilter(SecurityManager securityManager) {
            ShiroFilterFactoryBean shiroFilter = new ShiroFilterFactoryBean();
            shiroFilter.setSecurityManager(securityManager);
            shiroFilter.setLoginUrl("/login.html");
            shiroFilter.setUnauthorizedUrl("/");
    
            Map<String, String> filterMap = new LinkedHashMap<>();
            filterMap.put("/swagger/**", "anon");
            filterMap.put("/v2/api-docs", "anon");
            filterMap.put("/swagger-ui.html", "anon");
            filterMap.put("/webjars/**", "anon");
            filterMap.put("/swagger-resources/**", "anon");
    
            filterMap.put("/statics/**", "anon");
            filterMap.put("/login.html", "anon");
            filterMap.put("/sys/login", "anon");
            filterMap.put("/favicon.ico", "anon");
            filterMap.put("/captcha.jpg", "anon");
            filterMap.put("/**", "authc");
            shiroFilter.setFilterChainDefinitionMap(filterMap);
    
            return shiroFilter;
        }
    
        @Bean("lifecycleBeanPostProcessor")
        public LifecycleBeanPostProcessor lifecycleBeanPostProcessor() {
            return new LifecycleBeanPostProcessor();
        }
    
        @Bean
        public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
            AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
            advisor.setSecurityManager(securityManager);
            return advisor;
        }
    }

主要是下面这些地方相比一般使用shiro多了session管理的配置

注意在application.yml加入redis相关的配置

![20191029162651140.png][]

![20191029162707969.png][]

然后可以启动项目了，使用浏览器访问页面后就会看到session被保存到了redis中

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MzE2Mjcy_size_16_color_FFFFFF_t_70][]

至此shiro分布式session配置完成，下面是redis的高可用，请小伙伴们持续关注哦！

[centos7_keepalived_nginx_tomcat_springboot_nginx_tomcat]: https://blog.csdn.net/qq_37316272/article/details/102801189
[springboot_shiro_redis_shiro_redis_springboot]: https://blog.csdn.net/qq_37316272/article/details/102820862
[20191029162651140.png]: /images/20230531/8fbfb20e258841a58474a66bf123b8ed.png
[20191029162707969.png]: /images/20230531/d753afa6513746bfb5d17be4e47808d7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3MzE2Mjcy_size_16_color_FFFFFF_t_70]: /images/20230531/c2e55acbd233409084dd62079fcecc51.png