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#Follow and cancel [the transfer of external chain pictures fails, and the source station may have anti-theft chain mechanism. It is recommended to save the pictures and upload them directly (img-xwZ8AhZC-1646567007779)(D:\TyporaNotes \ Niuke forum project \ Chapter III pictures \ image-20220306104936732.png)] Design the key and Valu ...

setup () Setup () is a vue3 newly added component. Vue3 adopts the composite API. In order to use the composite API, we need an entry, which is called setup in the vue3 component. (to put it simply, do not use the data, method and calculated in vue2. All data and methods are written in setup.) Let's take a simple example: <template> ...

1, Basic version (including basic operation) This is the most common way of writing in our work RedisUtil: encapsulated Redis related API operationsRedisKeyPreConst: the key prefix involved in Redis cacheUserMapper: operation database The code implementation details are as follows: public class UserServiceImpl implements Use ...

GoLang's slice bottom layer and expansion rules 1. Structure In the first part, where are the elements stored? In the second part, how many elements are stored and how many elements can be stored 2. Variable declaration int type slice For example, declare an [] int, and the variable ints is composed of three parts on the right. The el ...

Preface: without any fancy preface, it is a basic and practical thing. 1. Introduction to listener What is a web listener? Web listener is a special class in Servlet, which can help developers monitor specific events in the web, such as the creation and destruction of ServletContext, httpsession and ServletRequest; Creation, destruction an ...

Redisson distributed lock implementation principle and source codeSource code analysisSimple business codeIt is mainly responsible for the source code entry. There are three main methods to use distributed locksRLock lock = redissonClient. Getlock ("HPC lock") gets the class that implements reentrant distributed lockslock. Locklock. U ...

Introduction to persistence Redis is an in memory database. If the database state in memory is not saved to disk, the database state in the server will be lost once the server process exits. So redis provides persistence function! What is persistence The working mechanism of using permanent storage media to save data and recover the saved ...

Reprinted from: https://blog.csdn.net/stilll123456/article/details/88370355 The original blogger has been reorganized into the following personal blog: SpringBoot integration shiro+jwt+redis - stateless token login (I) overviewSpringBoot integration shiro+jwt+redis - stateless token login (II) authorizationSpringBoot integration shiro+jwt+red ...

I. Redis command Redis supports five data (structure) types: string, hash, list, set and Zset Common command key management keys * : Returns all keys that are satisfied ,Fuzzy matching, for example keys abc* representative abc initial key exists key : Does the specified exist key，Returns 1 if it exists and 0 if it does not exist expire k ...

Redis has five basic data structures: string, list, hash, set and zset. They are the most frequently used and widely used data structures in daily development. If you understand these five data structures thoroughly, you will master half of redis application knowledge. string First, let's start with string. String represents a variable byte ...