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1, Antecedents There is a core project of the company. The client of redis has always used jedis. Later, the technical director asked to replace the jedis client with a more efficient lettuce client, and use the RedisTemplate class of spring framework to operate redis. However, the world is unpredictable. It is such a simple demand that makes ...

Redis: Basic Recommended java3y: https://mp.weixin.qq.com/s/SdE6MR9g-v93ZtJPme9e8Q 1: What is Redis? Redis is a memory cache database. The full name of redis is: remote dictionary server (remote data service), which is written in C language. Redis is a key value storage system (key value storage system), which supports rich data types, su ...

Previously, in the SpringBoot project, I have been using RedisTemplate to operate the data in Redis, which is also the way officially supported by Spring. Compared with Spring Data's support for MongoDB and ES, this way of using Template is really not elegant! Recently, RedisOM, Redis's exclusive ORM framework, has been officially launched by R ...

The reason for the problem: after using springsession to automatically add the setting attribute to redis, it will appear hexadecimal garbled code in front of the value. Even if redis serialization configuration is configured, it is useless, because spring session creates a redis itself, and the default is new JdkSerializationRedisSerializer(); ...

These three special data types are not a new type; The bottom layer is one of the five types; For example: Zset, String 1. Geospatial geographic location geo: geographical location[ ˈ spe ɪʃ l] spatial Positioning of friends, people nearby, taxi distance calculation? Redis's Geo is in redis3 Version 2 is launched! This function c ...

1. Turn off the firewall systemctl stop firewalld && systemctl disable firewalld 2. Switch to Alibaba source wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo yum clean all && yum makecache 3. Install gcc yum install gcc gcc-c++ Confirm whether the installation is successful Co ...

In daily development, there are many similar operations of reducing inventory, such as commodity inventory in e-commerce system, prize inventory in lottery system, etc. Solution Using mysql database, use a field to store inventory, and update this field every time you deduct inventory. The database is still used, but the inventory is layere ...

To realize the function of sending SMS verification code, we need to use a third-party library. Here we use Ronglian cloud Use Ronglian cloud to build applications Build a new application Just check the SMS verification code After the creation is successful, click application management to view it Account ID and account Token Application ...

How to solve the oversold problem of high price and high price? A problem caused by second kill The biggest problem of second kill is to solve the problem of oversold. One way to solve oversold is as follows: update goods set num = num - 1 WHERE id = 1001 and num > 0 Let's assume that there is only one item left, and num = 1 in the databa ...

#Using Redis to optimize login module Redis is used to optimize the functions with high access frequency that will affect efficiency Use Redis to store verification code [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 d ...