redis数据库安装（官方版）

最近在学校redis，首先咱们先从redis的安装部署开始。

一、软件下载网址：https://redis.io/

二、安装部署

（1）对下载的软件包进行解压和编译

$ tar xzf redis-4.0.9.tar.gz
$ cd redis-4.0.9
$ make

（2）启动redis

$ src/redis-server

（3）执行命令启动客户端，进行插入数据和查询数据

src/redis-cli
redis> set foo bar
OK
redis> get foo
"bar"

（4）使用java程序连接redis

        redis客户端：https://redis.io/clients

我们选择java语言，点击java链接，进入如下界面

java语言里有有好多出色的客户端，我们选择jedis，点击链接，进入github

jedis github地址：https://github.com/xetorthio/jedis

根据示例，pom文件中加入依赖，

    redis.clients
    jedis
    2.9.0
    jar
    compile

使用如下代码进行单机redis的连接

Jedis jedis = new Jedis("localhost");
jedis.set("foo", "bar");
String value = jedis.get("foo");

连接成功图：

备注：默认安装，是使用了安全模式的，不能直接连接，直接连接会会报错，需要修改redis的配置参数，重新启动：

具体修改：

a.注释绑定ip

b.修改密码（默认没密码）

c.并使用指定配置文件的方式启动redis

src/redis-server redis.conf 

否则会报错：

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.
	at redis.clients.jedis.Protocol.processError(Protocol.java:127)
	at redis.clients.jedis.Protocol.process(Protocol.java:161)
	at redis.clients.jedis.Protocol.read(Protocol.java:215)
	at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:340)
	at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:239)
	at redis.clients.jedis.Jedis.set(Jedis.java:121)
	at redis.RedisTest.main(RedisTest.java:11)

报错配置修改具体可以参考：https://blog.csdn.net/a532672728/article/details/78035559