node-redis 存取字符串、哈希、列表、集合、有序集合

2019-01-24  本文已影响0人  我的昵称好听吗

通过redis模块在node中连接到redis数据库: https://www.npmjs.com/package/redis

字符串

/**
 * redis string
 * 字符串
 */
const redisClient = require('../middlewares/redis');

module.exports = function (){
    redisClient.set('mystring','one');
    redisClient.get('mystring',function (err,replay){
        if (err) {
            console.log(err);
        }
        console.log(replay); // one
    });
};

哈希

/**
 * redis hash
 * 哈希
 */
const redisClient = require('../middlewares/redis');

module.exports = function (){
    redisClient.hmset("userInfo", {"name": null, "sex":null},function (err, res) {
        if (err) {
            console.log(err);
        } else {
            console.log(res);
        }
    });
    redisClient.hset("userInfo", "name", "xiaohua");
    redisClient.hget("userInfo", "name",(err,replies)=>{
        if (err) {
            logger.error(err);
        } else {
            console.log(replies);
        }
    });
    redisClient.hgetall("userInfo", function (err, obj) {
        console.log(obj);
    });
    redisClient.hdel('userInfo','name');
    redisClient.hgetall("userInfo", function (err, obj) {
        console.log(obj);
    });
};

列表

/**
 * redis list
 * 列表
 * 创建列表或者插入一个或多个数据:RPUSH key value [value ...]
 * 设置列表指定位置值:LSET key index value
 * 获取列表长度:LLEN key
 * 获取指定范围列表值:LRANGE key start stop
 */
const redisClient = require('../middlewares/redis');

module.exports = function (){
    redisClient.rpush('mylist',"one");
    redisClient.lset('mylist',0,'two');
    redisClient.llen('mylist',function (err,length){
        if (err) {
            console.log(err);
        } else {
            redisClient.LRANGE('mylist',0,length,function (err,replay){
                if (err) {
                    console.log(err);
                }
                console.log(replay); // [ 'two', 'one', 'one', 'one', 'one' ]
            });
        }
    });
};

集合

/**
 * redis set
 * 集合
 * 在指定key的集合中添加一个或者多个元素(重复元素只能设置一个): SADD key member [member ...]
 * key对应的集合中的元素数量:SCARD key
 * 返回key集合所有元素: SMEMBERS key
 */
const redisClient = require('../middlewares/redis');

module.exports = function (){
    redisClient.sadd('myset',"one");
    redisClient.sadd('myset',"two");
    redisClient.scard('myset',function (err,replay){
        if (err) {
            console.log(err);
        } else {
            console.log(replay); //2
        }
    });
    redisClient.smembers('myset',function (err,replay){
        if (err) {
            console.log(err);
        } else {
            console.log(replay); //[ 'one', 'two' ]
        }
    });
};

有序集合

/**
 * redis sorted set
 * 有序集合
 * 将所有指定成员添加到键为key有序集合(sorted set)里面: ZADD key [NX|XX] [CH] [INCR] score member [score member ...]
 * key对应有序集合中元素的数量:ZCARD key
 * 返回key对应有序集合中指定范围的元素:ZRANGE key start stop [WITHSCORES]
 */
const redisClient = require('../middlewares/redis');

module.exports = function (){
    redisClient.zadd('myzset',0,"one");
    redisClient.zadd('myzset',1,"one-");
    redisClient.zadd('myzset',2,"one1");
    redisClient.zcard('myzset',function (err,lenght){
        if (err) {
            console.log(err);
        } else {
            redisClient.zrange('myzset',0,lenght,'WITHSCORES',function (err,replay){
                if (err) {
                    console.log(err);
                } else {
                    console.log(replay); // [ 'one','0','one-','1','one1','2'] |  [ 'one','one-',one1']
                }
            });
        }
    });
};
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