redis

2020-02-26 本文已影响0人华盛顿可乐

Redis安装

下载地址官网 https://redis.io/download 安装准备：（1）VMware Workation虚拟机（2）Linux(CentOS)系统（3）SecureCRT(Xshell也行) 安装过程：（1）安装编译器：yum install gcc-c++（需要先安装C++编译器，redis 使用c++写的）（2）下载Redis源码并上传到服务器（3）解压Redis压缩包：tar -zxvf redis （4）进入Redis目录进行编译：make （2/3/4步）或者直接在Linux上( $符不用输入)$ wget http://download.redis.io/releases/redis-3.2.9.tar.gz（下载） $tar xzf redis-3.2.9.tar.gz（解压）$ cd redis-3.2.9 $ make（编译）编译后是二进制文件仅在目录中 src 可用。运行Redis：要想更好的使用还需（5）安装Redis：make PREFIX=/user/local/redis install （6）将redis.conf拷贝到Redis安装目录：cp redis.conf /usr/local/redis （7）进入安装目录，更改redis.conf文件：vim redis.conf --> daemonize no 改为 yes（之后可以后台模式运行）（vi 下按i 进行编辑按esc后shift+zz(或者直接l俩大写Z)，或者：wq 保存并退出）（8）启动redis后端模式：./bin/redis-server ./redis.conf （9）终止redis的操作： ./bin/redis-cli shutdown (10) 打开redis:./bin/redis-cli使用redis,使用 set name helloworld ,就可以插入值,使用get name 查看del删除keys * 查看所有的key (11)ps -ef | grep -i redis查看是否已经启动

上述命令输入时遇到错误比如-bash: wget: command not found 是你电脑上没装这个功能，百度装一下就好了这个问题： yum -y install wget 就OK了

Jedis的使用

Jedis 是 Redis 官方首选的 Java 客户端开发包

虚拟机设置

查看虚拟机的ip

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="shell" cid="n12" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; background: rgb(51, 51, 51); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; position: relative !important; padding: 10px 10px 10px 30px; width: inherit; color: rgb(184, 191, 198); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">ifconfig

将查到的ip地址写在Jedis("192.168.40.128",6379);中</pre>

将虚拟机的6379端口打开

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="shell" cid="n16" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; background: rgb(51, 51, 51); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; position: relative !important; padding: 10px 10px 10px 30px; width: inherit; color: rgb(184, 191, 198); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">#运行下面的命令如果是新建的一个新的文件，你需要先安装 iptables，再打开
vim /etc/sysconfig/iptables

安装命令

yum install -y iptables-services</pre>

重启服务

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="shell" cid="n20" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; background: rgb(51, 51, 51); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; position: relative !important; padding: 10px 10px 10px 30px; width: inherit; color: rgb(184, 191, 198); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">service iptables restart

执行上面的命令，如果提示

Redirecting to /bin/systemctl restart iptables.service

则执行

/bin/systemctl restart iptables.service</pre>

启动redis服务（参考上篇文章）

java代码

新建一个maven的java项目
引入依赖

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" cid="n30" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; background: rgb(51, 51, 51); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; position: relative !important; padding: 10px 10px 10px 30px; width: inherit; color: rgb(184, 191, 198); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"> <dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.9</version>
</dependency></pre>

建立测试类

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="java" cid="n34" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; background: rgb(51, 51, 51); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; position: relative !important; padding: 10px 10px 10px 30px; width: inherit; color: rgb(184, 191, 198); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**

@Auther: curry
@Date: 2018/5/31 23:04
@Description:
/

public class Test {
@Test
/
jedis单例测试
*/
public void test01(){
//1.设置IP地址和端口
Jedis jedis=new Jedis("192.168.40.128",6379);
//2.保存数据
jedis.set("name","imooc");
//3.获取数据
String name = jedis.get("name");
System.out.println(name);
jedis.close();
}
@Test
public void demo2(){
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(30);
config.setMaxIdle(10);
JedisPool jedisPool = new JedisPool(config,"192.168.40.128",6379);
Jedis jedis = null;
try{
jedis = jedisPool.getResource();
jedis.set("name", "毛毛");
String value = jedis.get("name");
System.out.println(value);
}catch(Exception e){
e.printStackTrace();
}finally{
if(jedis != null){
jedis.close();
}
if(jedisPool != null){
jedisPool.destroy();
}
}
}
}</pre>

意外问题

提示time out错误需要再iptables防火墙上添加上6379端口并重启防火墙服务
提示connection refuse错误需要注释掉redis.conf 文件中的 bind 127.0.0.1
提示JedisDataException错误需要将redis.conf文件中的protect-mode 置为no 最后重启redis

Redis数据结构

https://blog.csdn.net/Dream_Weave/article/details/85132547