在idea中操作redis数据库(五种数据类型)_idea redis

 创建JedisTests测试类,为了避免重复重建和销毁Jedis对象,使用注解创建和销毁

@Before  @After

    private Jedis jedis;
 
    @Before
    public void redisConnection(){
        jedis= JedisPoolUtil.getJedis();
    }
 
    @After
    public void redisClose(){
        jedis.close();
    }

string类型

 @Test  
    public void redisString(){
        //添加成功返回ok
        System.out.println(jedis.set("k","hello redis"));
        //获取键的值
        System.out.println(jedis.get("k"));;
        //获取键的数据类型       不存在返回none
        System.out.println(jedis.type("k"));
        //获取key对应value的长度         不存在返回0
        System.out.println(jedis.strlen("k"));
        //查询key的过期时间        不存在返回-2         -1永不过期
        System.out.println(jedis.ttl("k"));
 
 
 
        //设置多组键值对
        jedis.mset("k1","value1","k2","value2");
        //查询多个键的值
        System.out.println( jedis.mget("k1","k2"));
    }
 

集合:

  @Test
    public void redisList(){
        //返回值 1
/*        System.out.println( jedis.rpush("list","小元,小满,小白"));;
        jedis.lpush("list","小李,小鸣,小佐");*/
 
    /*    System.out.println(jedis.llen("list"));
        System.out.println(jedis.lpop("list"));//返回被删除的元素
        System.out.println(jedis.rpop("list"));//返回被删除的元素
        System.out.println(jedis.llen("list"));*/
 
        System.out.println(jedis.lrange("list",0,-1));
 
        System.out.println(jedis.lindex("list",0));
 
    }

set集合:

 
    @Test
    public void redisSet(){
       //返回添加的个数
    /*    System.out.println(jedis.sadd("number","java"));
        System.out.println(jedis.sadd("number","redis","script","javaEE"));
*/
        //查询set中的所有元素
        System.out.println(jedis.smembers("number"));
 
 
/*
        System.out.println(jedis.spop("number"));//随机删除左边第一个元素 返回删除的数据
        System.out.println(jedis.srem("number","java"));//指定删除
        System.out.println(jedis.smembers("number"));
*/
        //判断某元素是否存在   true存在
        System.out.println(jedis.sismember("number","java"));
 
        //随机查询
        System.out.println(jedis.srandmember("number",1));
 
       //获取长度
        System.out.println(jedis.scard("number"));
 
    }

哈希:

    @Test
    public void redisHash(){
/*        System.out.println(jedis.hset("user","username","tom"));     1
        System.out.println(jedis.hget("user","username" ));*/
 
         /*       Map m =new HashMap<>();
                m.put("age","18");
                m.put("gender","男");
 
 
        System.out.println(jedis.hmset("user",m));// ok
        System.out.println(jedis.hmget("user","age","gender"));*/
 
      /*  //获取所有的键
        System.out.println(jedis.hkeys("user"));
        //获取所有的值
        System.out.println(jedis.hvals("user"));
       //获取长度
        System.out.println(jedis.hlen("user"));
        //键中是否有某属性
        System.out.println(jedis.hexists("user","username"));
       */
        //查看所有的键值
//        System.out.println(jedis.hgetAll("user"));
 
        //删除某属性
        System.out.println(jedis.hdel("user","gender"));
 
 
    }

有序集合:

  @Test
    public void  redisOrderedSets(){
         /*   jedis.zadd("odd",10,"java");
            jedis.zadd("odd",20,"javaEE");
            jedis.zadd("odd",30,"javaWeb");
            jedis.zadd("odd",40,"javaScprit");*/
 
         //查询所有
        System.out.println(jedis.zrange("odd",0,-1));
        //分数从高到低
        System.out.println(jedis.zrevrange("odd",0,-1));
        //查询指定区间的数据
        System.out.println(jedis.zrangeByScore("odd",30,40));
        //返回指定的分数取值
        System.out.println(jedis.zscore("odd","javaWeb"));
        //查询元素的个数
        System.out.println(jedis.zcard("odd"));
       /* System.out.println(jedis.zrem("odd","java","javaEE"));//返回删除的个数
        System.out.println(jedis.zcard("odd"));*/
 
 
 
    }