SpringBoot从入门到精通-第16章 Redis

一、Redis简介

Redis是一款基于内存的Key-Value结构的数据库，在加上其底层采用单线程、多路I/O复用模型，使得Redis的运行速度非常快，可以很好的完成高并发、大数据的吞吐任务。

二、Redis常用命令

1. 键值命令

**赋值取值操作**
[root@localhost ~]# sh redis-cli.sh 
10.0.0.132:6379> set name zhang3
OK
10.0.0.132:6379> get zhang3
(nil)
10.0.0.132:6379> get "zhang3"
(nil)
10.0.0.132:6379> get name
"zhang3"
10.0.0.132:6379> 

**库操作**
10.0.0.132:6379[6]> select 0
OK
10.0.0.132:6379> get name
"zhang3"
10.0.0.132:6379> move name 6
(integer) 1
10.0.0.132:6379> get name
(nil)
10.0.0.132:6379> select 6
OK
10.0.0.132:6379[6]> get name
"zhang3"
10.0.0.132:6379[6]> 

**清空库**
10.0.0.132:6379[6]> FLUSHALL
OK
10.0.0.132:6379[6]> get name
(nil)
10.0.0.132:6379[6]> 

**查看所有**
10.0.0.132:6379[6]> KEYS *
(empty list or set)
10.0.0.132:6379[6]> set name wang5
OK
10.0.0.132:6379[6]> set age 222222
OK
10.0.0.132:6379[6]> KEYS *
1) "age"
2) "name"
10.0.0.132:6379[6]> 

2. 哈希命令

为哈希类型赋值
10.0.0.132:6379[8]> HSET user 001 zhang3
(integer) 1
10.0.0.132:6379[8]> HSET user 002 wang5
(integer) 1
10.0.0.132:6379[8]> HSET user 003 li4
(integer) 1
10.0.0.132:6379[8]> KEYS *
1) "user"
10.0.0.132:6379[8]> HGET *
(error) ERR wrong number of arguments for 'hget' command
10.0.0.132:6379[8]> HGET user 001
"zhang3"
10.0.0.132:6379[8]> HGET user 002
"wang5"
10.0.0.132:6379[8]> HGET user 003
"li4"
10.0.0.132:6379[8]> 

3. 列表命令

赋值、取值
10.0.0.132:6379> SELECT 10
OK
10.0.0.132:6379[10]> LPUSH demo 1 2 3 4 5 6 
(integer) 6
10.0.0.132:6379[10]> LPUSH test a s d f g h
(integer) 6
10.0.0.132:6379[10]> RPUSH demo 33 22 11
(integer) 9
10.0.0.132:6379[10]> LRANGE demo 0 -1
1) "6"
2) "5"
3) "4"
4) "3"
5) "2"
6) "1"
7) "33"
8) "22"
9) "11"
10.0.0.132:6379[10]> LRANGE test 0 3
1) "h"
2) "g"
3) "f"
4) "d"

4. 集合命令

10.0.0.132:6379[10]> SELECT 3
OK
10.0.0.132:6379[3]> SADD demo aa ss dd ff gg a
(integer) 6
10.0.0.132:6379[3]> SMEMBERS demo
1) "ss"
2) "ff"
3) "dd"
4) "a"
5) "aa"
6) "gg"
10.0.0.132:6379[3]> SPOP demo
"ss"
10.0.0.132:6379[3]> SPOP demo
"dd"
10.0.0.132:6379[3]> SPOP demo
"gg"
10.0.0.132:6379[3]> SPOP demo
"aa"

三、示例

• 使用SpringBoot项目给Redis存入key
• 使用SpringBoot项目读取Redis的key

四、整合Redis

• 2.1、创建springboot项目

• 2.2、引入Redis依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.5.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>_20250704springboot_redis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>20250704springboot_redis</name>
    <description>20250704springboot_redis</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-redis</artifactId>
            <version>1.4.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

• 2.3、添加配置文件

spring.application.name=20250704springboot_redis
spring.data.redis.host=10.0.0.132
spring.data.redis.port=6379

• 2.4、编写代码使用Redis

package com.example._20250704springboot_redis;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class Controller {
    @Autowired
    private StringRedisTemplate template;

    @RequestMapping("/redis")
//    public String sout(){
//        System.out.println("redis_fun");
//        return "redis";
//    }
    public String set(){
        template.opsForValue().set("name","zhang3");
        return "set over";
    }
    @RequestMapping("/getredis")
    public String get(){
        return template.opsForValue().get("name");
    }
}

• 2.5、测试Redis，增、查