准备 Redis 服务器
部署 Redis
Redis 配置文件
提示：我的 Redis 部署在 /usr/local/redis-6.0.8 目录，配置文件存放在 /usr/local/redis 目录。
复制 /usr/local/redis-6.0.8/redis.conf 配置文件到 /usr/local/redis 目录：
$ cp /usr/local/redis-6.0.8/redis.conf /usr/local/redis
提示：因为我的测试程序与 Redis 服务器分别位于不同的主机，所以需要修改配置，方便测试程序访问 Redis 服务器。
编辑 /usr/local/redis 配置文件，注释 bind 127.0.0.1（第 22 行），监听所有网卡的连接请求：
# By default, if no "bind" configuration directive is specified, Redis listens
# for connections from all the network interfaces available on the server.
# It is possible to listen to just one or multiple selected interfaces using
# the "bind" configuration directive, followed by one or more IP addresses.
#
# Examples:
#
# bind 192.168.1.100 10.0.0.1
# bind 127.0.0.1 ::1
#
# ~~~ WARNING ~~~ If the computer running Redis is directly exposed to the
# internet, binding to all the interfaces is dangerous and will expose the
# instance to everybody on the internet. So by default we uncomment the
# following bind directive, that will force Redis to listen only into
# the IPv4 loopback interface address (this means Redis will be able to
# accept connections only from clients running into the same computer it
# is running).
#
# IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES
# JUST COMMENT THE FOLLOWING LINE.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#bind 127.0.0.1
设置认证密码（第 8 行）：
# IMPORTANT NOTE: starting with Redis 6 "requirepass" is just a compatiblity
# layer on top of the new ACL system. The option effect will be just setting
# the password for the default user. Clients will still authenticate using
# AUTH <password> as usually, or more explicitly with AUTH default <password>
# if they follow the new protocol: both will work.
#
# requirepass foobared
requirepass 123456
启动 Redis 服务器
启动 Redis 服务器：
$ /usr/local/redis-6.0.8/src/redis-server /usr/local/redis/redis.conf
查看是否存在关于 redis-server 的进程，以此确认 Redis 服务器启动成功：
$ ps -ef | grep redis
root 4299 1632 0 17:02 pts/0 00:00:00 /usr/local/redis-6.0.8/src/redis-server *:6379
root 4306 1985 0 17:03 pts/1 00:00:00 grep --color=auto redis
开放端口
开放 6379 端口：
$ firewall-cmd --list-all # 查看防火墙规则
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client http ssh
ports: 22122/tcp 23000/tcp 8761/tcp 8081/tcp 8080/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
$ firewall-cmd --zone=public --add-port=6379/tcp --permanent # 永久性地添加 6379/tcp 端口规则到 public 区域
success
$ firewall-cmd --reload # 重新加载防火墙规则
success
$ firewall-cmd --list-all # 查看防火墙规则，确认是否添加成功
public (active)
target: default
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client http ssh
ports: 22122/tcp 23000/tcp 8761/tcp 8081/tcp 8080/tcp 6379/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
Java 客户端
项目基于 Spring Boot 2.3.4.RELEASE，新建 Maven Project，修改 pom.xml 文件，引入依赖：
<?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>2.3.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.mk</groupId>
<artifactId>spring-boot-redis</artifactId>
<version>1.0.0</version>
<name>spring-boot-redis</name>
<description>Redis 缓存</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.yml 配置文件：
spring:
redis:
database: 0 # Database index used by the connection factory.
host: 192.168.88.158 # Redis server host.
port: 6379 # Redis server port.
password: 123456 # Login password of the redis server.
timeout: 3000 # Connection timeout.
lettuce:
pool:
max-active: 8
max-wait: 1
min-idle: 0
max-idle: 8
logging:
level:
com.mk: debug
测试类，这里通过缓存数据并尝试获取，以此测试 Java 客户端与 Redis 服务器之间的连通性：
package com.mk;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
@SpringBootTest
class SpringBootRedisApplicationTests {
@Autowired
private StringRedisTemplate stringRedisTemplate;
@Test
void contextLoads() {
ValueOperations<String, String> opsForValue = this.stringRedisTemplate.opsForValue();
opsForValue.set("name", "lisi"); // 缓存数据
String value = opsForValue.get("name"); // 获取缓存数据
System.out.println(value);
}
}