Redis5种常用的数据类型

Redis字符串String

Redis哈希hash

Redis列表

Redis集合

Redis有序集合

Redis通用命令

SpringDataRedis

String类型

        redisTemplate.opsForValue().set("city", "NanChang");
        String cityName = (String) redisTemplate.opsForValue().get("city");
        System.out.println(cityName);

        redisTemplate.opsForValue().set("city2", "JiAn", 10L, TimeUnit.SECONDS);//设置过期时间

        Boolean b = redisTemplate.opsForValue().setIfAbsent("city", "Beijing");//如果key不存在再创建
        System.out.println(Boolean.TRUE.equals(b) ? "操作成功" : "操作失败");

hash类型

        HashOperations hashOperations = redisTemplate.opsForHash();

        //存值
        hashOperations.put("002", "name", "黄乘明");
        hashOperations.put("002", "age", "21");
        hashOperations.put("002", "address", "南昌");

        //取值
        String name = (String) hashOperations.get("002", "name");
        System.out.println(name);

        //获取hash字段中的所有field
        Set keys = hashOperations.keys("002");
        for (Object key : keys) {
            System.out.println(key);
        }

        //获取hash结构中所有的value
        List values = hashOperations.values("002");
        for (Object value : values) {
            System.out.println(value);
        }

列表类型

        ListOperations listOperations = redisTemplate.opsForList();
        //存值
        listOperations.leftPush("myList", "a");
        listOperations.leftPushAll("myList", "b", "c", "d");
        //取值
        List<String> myList = listOperations.range("myList", 0, -1);
        for (String s : myList) {
            System.out.println(s);
        }
        //获取列表长度
        Long size = listOperations.size("myList");
        int intSize = size.intValue();
        //出队列
        for (int i = 0; i < intSize; i++) {
            String element = (String) listOperations.rightPop("myList");
            System.out.println(element + "已退出队列");
        }

操作set

        SetOperations setOperations = redisTemplate.opsForSet();
        //填入数据
        setOperations.add("mySet", "a", "b", "c", "a");

        //取值
        Set<String> mySet = setOperations.members("mySet");
        for (String s : mySet) {
            System.out.println(s);
        }

        //删除成员
        setOperations.remove("mySet","a", "b");

ZSet

        ZSetOperations zSetOperations = redisTemplate.opsForZSet();

        //添加数据
        zSetOperations.add("game", "hcm", 10.0);
        zSetOperations.add("game", "ywh", 11.0);
        zSetOperations.add("game", "lzh", 9.6);
        zSetOperations.add("game", "wh", 100.0);

        //查看数据
        Set<String> game = zSetOperations.range("game", 0, -1);
        for (String s : game) {
            System.out.println(s);
        }

        //修改分数
        zSetOperations.incrementScore("game", "hcm", 0.1);
        //查看数据
        game = zSetOperations.range("game", 0, -1);
        for (String s : game) {
            System.out.println(s);
        }

        //移除元素
        zSetOperations.remove("game", "hcm", "lzh");
        //查看数据
        game = zSetOperations.range("game", 0, -1);
        for (String s : game) {
            System.out.println(s);
        }

通用操作

        //获取redis中所有的key
        Set<String> keys = redisTemplate.keys("*");
        for (String key : keys) {
            System.out.println(key);
        }

        //判断某个key是否存在
        Boolean b = redisTemplate.hasKey("city");
        System.out.println(b);

        //删除指定key
        redisTemplate.delete("game");

        //获取某个key对应的数据类型
        DataType mySet = redisTemplate.type("mySet");
        System.out.println(mySet.name());