Redis安装教程：如何在Ubuntu上一步步安装Redis？

sudo apt install lsb-release curl gpg

curl -fsSL https://packages.redis.io/gpg | sudo gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/redis.list

sudo apt-get update

sudo apt-get install redis

/etc/init.d/redis-server start

systemctl start redis-server

service redis-server start

service redis-server restart

service redis-server stop

service redis-server status

bind 127.0.0.1 -::1

<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>4.3.1</version>
</dependency>

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.edu.sgu.www</groupId>
    <artifactId>jedis</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>4.3.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>RELEASE</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

package cn.edu.sgu.www;

import org.junit.Test;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

import java.util.HashMap;
import java.util.Map;

/**
 * @author 沐雨橙风
 * @version 1.0
 */
public class JedisTests {

    @Test
    public void test() {
        JedisPool pool = new JedisPool("192.168.65.128", 6379);

        try (Jedis jedis = pool.getResource()) {
            // set key value
            jedis.set("foo", "bar");

            System.out.println(jedis.get("foo"));

            // hmset key field value field1 value1 ... ...
            Map<String, String> hash = new HashMap<>();

            hash.put("age", "18");
            hash.put("name", "mumu");
            hash.put("height", "18");

            jedis.hmset("user-session:123", hash);

            System.out.println(jedis.hgetAll("user-session:123"));
        }
    }

}

redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in protected mode because protected mode is enabled and no password is set for the default user. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Set up an authentication password for the default user. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

service redis-server restart