Redis测试类

单机&集群安装： https://blog.csdn.net/zxd1435513775/article/details/88901992
安装5.0.4版本OK，5.0.5版本make时报错。

redis.conf配置：
参考：
https://www.cnblogs.com/taiyonghai/p/5826134.html
https://www.cnblogs.com/taiyonghai/p/5826237.html
https://blog.csdn.net/tiantiandjava/article/details/72831529（重点参考）

bind 127.0.0.1（注释）
Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: Failed connecting to host 192.167.2.167:6379
Caused by: java.net.ConnectException: Connection refused: connect
该处英文说明bind的是interface，也就是说是网络接口。服务器可以有一个网络接口(通俗的说网卡，执行ifconfig查看)，或者多个。打个比方说机器上有两个网卡，分别为192.168.205.5 和192.168.205.6，如果bind 192.168.205.5，那么只有该网卡地址接受外部请求，如果不绑定，则两个网卡口都接受请求。
执行ps -ef | grep redis-server，可以看到区别，# bind 127.0.0.1显示root 32012 1 0 14:00 ? 00:00:00 ./redis-server *:6379，bind 192.167.2.167显示root 2850 1 0 14:08 ? 00:00:00 ./redis-server 192.167.2.167:6379
bind 192.167.2.167，则本机的客户端连接必须是./redis-cli -h 192.167.2.167，否则可以直接./redis-cli连接

protected-mode no（改成yes）
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.

daemonize no（改成yes）
pidfile /var/run/redis_6379.pid

redis采用的是单进程多线程的模式。当redis.conf中选项daemonize设置成yes时，代表开启守护进程模式。在该模式下，redis会在后台运行，并将进程pid号写入至redis.conf选项pidfile设置的文件中，此时redis将一直运行，除非手动kill该进程。但当daemonize选项设置成no时，当前界面将进入redis的命令行界面，exit强制退出或者关闭连接工具(putty,xshell等)都会导致redis进程退出。
服务端开发的大部分应用都是采用后台运行的模式。
当redis在后台运行的时候，Redis默认会把pid文件放在/var/run/redis_6379.pid，可以配置到其他地址。当运行多个redis服务时，需要指定不同的pid文件和端口。

requirepass iMC123（放开注释）
参考 https://www.cnblogs.com/suanshun/p/7699084.html
说明：Warning: since Redis is pretty fast an outside user can try up to 150k passwords per second against a good box. This means that you should use a very strong password otherwise it will be very easy to break. redis的查询速度是非常快的，外部用户一秒内可以尝试多大150K个密码；所以密码要尽量长（对于DBA 没有必要必须记住密码）；
客户端 ./redis-cli -p 6379 -a iMC123或./redis-cli -p 6379，在执行auth iMC123
Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: NOAUTH Authentication required.

依赖

<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>3.0.1</version>
</dependency>

代码

package com.example.demo_mg.test;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

public class TestRedis {
    public static void main( String[] args ) {
        //方式一
//        test1();

        //方式二：线程池
        test2();
    }

    private static void test1() {
        Jedis jedis = new Jedis("129.204.58.30",6379);
        jedis.auth("test123"); //密码
        System.out.println(jedis.ping()); //PONG
        jedis.set("hello","world");
        String value = jedis.get("hello");
        System.out.println(value);
        jedis.close();
    }

    private static void test2() {
        JedisPool pool = new JedisPool("129.204.58.30",6379);
        Jedis jedis = pool.getResource();
        String value = jedis.get("hello");
        System.out.println(value);
        jedis.close();
    }
}