ubuntu环境下安装Redis

Posted 2020-10-04 JohnKing

1.命令行安装

sudo apt-get update
sudo apt-get install redis-server

2.启动redis

$redis-server

3208:C 30 Aug 21:18:42.264 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
3208:M 30 Aug 21:18:42.266 * Increased maximum number of open files to 10032 (it was originally set to 1024).
                _._                                                  
           _.-``__ ‘‘-._                                             
      _.-``    `.  `_.  ‘‘-._           Redis 3.0.6 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ‘‘-._                                   
 (    ‘      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|‘` _.-‘|     Port: 6379
 |    `-._   `._    /     _.-‘    |     PID: 3208
  `-._    `-._  `-./  _.-‘    _.-‘                                   
 |`-._`-._    `-.__.-‘    _.-‘_.-‘|                                  
 |    `-._`-._        _.-‘_.-‘    |           http://redis.io        
  `-._    `-._`-.__.-‘_.-‘    _.-‘                                   
 |`-._`-._    `-.__.-‘    _.-‘_.-‘|                                  
 |    `-._`-._        _.-‘_.-‘    |                                  
  `-._    `-._`-.__.-‘_.-‘    _.-‘                                   
      `-._    `-.__.-‘    _.-‘                                       
          `-._        _.-‘                                           
              `-.__.-‘                                               

3208:M 30 Aug 21:18:42.267 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
3208:M 30 Aug 21:18:42.267 # Server started, Redis version 3.0.6
3208:M 30 Aug 21:18:42.267 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add ‘vm.overcommit_memory = 1‘ to /etc/sysctl.conf and then reboot or run the command ‘sysctl vm.overcommit_memory=1‘ for this to take effect.
3208:M 30 Aug 21:18:42.267 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command ‘echo never > /sys/kernel/mm/transparent_hugepage/enabled‘ as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
3208:M 30 Aug 21:18:42.267 * The server is now ready to accept connections on port 6379

4.启动客户端

$ redis-cli
127.0.0.1:6379> 

5.验证是否安装成功

127.0.0.1:6379> ping
PONG

6.java连接测试

public class RedisTest {    
    public static void main(String[] args) {
        Jedis jedis = new Jedis("localhost");
        System.out.println("redis connect success");
        
        //添加String
        jedis.set("mykey1", "hahahaha");
        System.out.println("添加完成"+jedis.get("mykey1"));
        
        //添加list
        String[] strs = {"haha","heihei","heheh"};
        jedis.lpush("list1", strs);
        //获取list数据
        List<String> list = jedis.lrange("list1", 0, 2);
        for(String va : list) {
            System.out.println("列表list1:"+va);
        }
        showKeys(jedis);
    }
    /**
     * 显示所有key
     * @param jedis
     */
    private static void showKeys(Jedis jedis) {
        Set<String> set = jedis.keys("*");
        Iterator<String> iter = set.iterator();
        while(iter.hasNext()) {
            String key = iter.next();
            System.out.println("key:"+key);
        }
    }
}