springboot整合redis实现shiro的分布式session共享的方法

package com.chhliu.springboot.shiro.cache; 
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 
@SuppressWarnings({ "rawtypes", "unchecked" }) 
public class RedisSessionDao extends AbstractSessionDAO { 
 
  // Session超时时间，单位为毫秒 
  private long expireTime = 120000; 
 
  @Autowired 
  private RedisTemplate redisTemplate;// Redis操作类，对这个使用不熟悉的，可以参考前面的博客 
 
  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 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; 
  } 
} 

 @Bean 
  public DefaultWebSessionManager configWebSessionManager(){ 
    DefaultWebSessionManager manager = new DefaultWebSessionManager(); 
    manager.setCacheManager(cacheManager);// 加入缓存管理器 
    manager.setSessionDAO(sessionDao);// 设置SessionDao 
    manager.setDeleteInvalidSessions(true);// 删除过期的session 
    manager.setGlobalSessionTimeout(sessionDao.getExpireTime());// 设置全局session超时时间 
    manager.setSessionValidationSchedulerEnabled(true);// 是否定时检查session 
     
    return manager; 
  } 

@Bean 
  public SecurityManager securityManager(DefaultWebSessionManager webSessionManager) { 
    DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager(); 
    // 设置realm. 
    securityManager.setRealm(myShiroRealm()); 
 
    // 注入缓存管理器; 
    securityManager.setCacheManager(cacheManager);// 这个如果执行多次，也是同样的一个对象; 
     
    // session管理器 
    securityManager.setSessionManager(webSessionManager); 
     
    //注入记住我管理器; 
    securityManager.setRememberMeManager(rememberMeManager()); 
    return securityManager; 
  }