Nodejs基础之redis

redis

安装redis 模块
npm install redis
1
代码部分
const redis = require(\'redis\')

const client = redis.createClient(6379, \'localhost\')
client.set(\'hello\', {a:1, b:2}) // 注意，value会被转为字符串,所以存的时候要先把value 转为json字符串
client.get(\'hello\', function(err, value){
    console.log(value)
})

设置和读取list型数据结构(会重复插入)
const redis = require(\'redis\')
const client = redis.createClient(6379, \'localhost\')

client.rpush(\'testLists\', \'a\') // 从右边插入
client.rpush(\'testLists\', \'b\')
client.rpush(\'testLists\', \'b\')
client.lpush(\'testLists\', \'1\')// 从左边插入
// 读取 0:开头 -1:结尾
client.lrange(\'testLists\', 0, -1, function(err,lists){
    console.log(lists)
})

list的出栈（删除）
const redis = require(\'redis\')
const client = redis.createClient(6379, \'localhost\')

client.lpop(\'testLists\', function(e,v){
    v // 被出栈的元素
}) // 从左边出栈
client.rpop(\'testLists\', function(e,v){}) // 从右边出栈

集合的设置和读取(不会重复插入)
const redis = require(\'redis\')
const client = redis.createClient(6379, \'localhost\')
// 设置
client.sadd(\'testSet\', 1}) 
client.sadd(\'testSet\', 2})  
// 读取
client.smentbers(\'testSet\', function(e,v){
    console.log(v)
})

发布和订阅
const redis = require(\'redis\')
const client = redis.createClient(6379, \'localhost\')
// 发布
client.publish(\'testPublish\', \'message form testPublish\')
// 订阅
client.subscribe(\'testPublish\')
// 监听消息
client.on(\'message\', function(channel,msg){
    console.log(channel + \':\' +  msg)
})