这篇接着上面一篇【linux下安装redis【阿里云CentOS7.3】】

第一步：导入jar（这里使用maven导入）如果你不整合springboot应该只需要下面一个就好了

<!-- redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <version>2.0.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>

第二步：开启安全组（因为我的是在阿里云上面的，前提你已经关闭了防火墙）


阿里云ESC开启安全组

如果你不是阿里云的就是本地的Linux应该只需要关闭防火墙就好了

第三步：测试连接

import redis.clients.jedis.Jedis;
public class redis {
    public static void main(String[] args) {
        //连接本地的 Redis 服务
        Jedis jedis = new Jedis("你自己的服务器ip",6379);
        System.out.println("连接成功");
        //查看服务是否运行
        System.out.println("服务正在运行: "+jedis.ping());
    }
}

报了以下错误

Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. 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) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

在网上找到了解决办法（但是我的第二个是 daemonize yes）也没有问题

原文地址：redis 报错 Redis protected-mode 配置文件没有真正启动