redis

redis切换db
@Component
public class RedisDBChangeUtil {
@Autowired
private StringRedisTemplate redisTemplate;

public void setDataBase(int num) {
LettuceConnectionFactory connectionFactory = (LettuceConnectionFactory) redisTemplate.getConnectionFactory();
if (connectionFactory != null && num != connectionFactory.getDatabase()) {
connectionFactory.setDatabase(num);
connectionFactory.afterPropertiesSet();
this.redisTemplate.setConnectionFactory(connectionFactory);
connectionFactory.resetConnection();
}
}
}

  redis常用存取

1.list

List<User> list = redisTemplate.opsForList().range("aaa", 0, -1);
while (redisTemplate.opsForList().size("aaa") > 0){
redisTemplate.opsForList().leftPop("aaa");
}
redisTemplate.opsForList().rightPushAll("aaa", list,100);

2.对象

redisTemplate.opsForValue().set(key, value);


redis单线程为什么那么快:
  • 纯内存操作
  • 使用IO多路复用技术
  • 非CPU密集型任务
posted @ 2020-12-24 15:02  洋洋兮若江河  阅读(215)  评论(0编辑  收藏  举报