Redis入门到实战教程（基础篇）笔记

教学来源：

Redis课程介绍导学_哔哩哔哩_bilibilihttps://www.bilibili.com/video/BV1cr4y1671t?p=1一、Redis 入门

1.认识NoSQL

2.Redis在虚拟机中的安装和开机自启

Redis在虚拟机中安装和配置开机自启-CSDN博客https://blog.csdn.net/qq_69183322/article/details/138168301

3.Redis的数据结构

4.Redis的基本类型

（1）字符串String类型

（2）哈希Hash类型

（3）列表List类型

（4）集合Set类型

（5）有序集合类型

二、Redis的Java客户端Jedis

（1）Jedis简单示例

引入依赖：

        <dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>3.7.0</version></dependency>

代码示例：

package com.example.redisdemo;import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import redis.clients.jedis.Jedis;import java.util.Map;@SpringBootTest
class RedisDemoApplicationTests {private Jedis jedis;@BeforeEachvoid setUp(){jedis = new Jedis("localhost",6379);
//密码
//       jedis.auth("123");jedis.select(0);}@Testvoid testString(){String result  = jedis.set("name","张四");System.out.println("result="+result);String name = jedis.get("name");System.out.println("name="+name);}@Testvoid testHash(){jedis.hset("user:1","name","Jack");jedis.hset("user:1","age","21");Map<String,String> map = jedis.hgetAll("user:1");System.out.println(map);}@AfterEachvoid tearDown(){if(jedis !=null){jedis.close();}}}

（2）Jedis连接池

在utils中写Jedis连接池的配置:

package com.example.redisdemo.utils;import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;public class JedisConnectionFactory {private static  final JedisPool jedisPool;static {JedisPoolConfig poolConfig = new JedisPoolConfig();poolConfig.setMaxTotal(8);poolConfig.setMaxIdle(8);poolConfig.setMaxIdle(0);poolConfig.setMaxWaitMillis(1000);jedisPool = new JedisPool(poolConfig,"192.168.92.136",6379,1000,"123456");}public static Jedis getJedis(){return jedisPool.getResource();}
}

在test中进行测试：

package com.example.redisdemo;import com.example.redisdemo.utils.JedisConnectionFactory;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import redis.clients.jedis.Jedis;import java.util.Map;@SpringBootTest
class RedisDemoApplicationTests {private Jedis jedis;@BeforeEachvoid setUp(){
//       jedis = new Jedis("192.168.92.136",6379);jedis = JedisConnectionFactory.getJedis();jedis.auth("123456");jedis.select(0);}@Testvoid testString(){String result  = jedis.set("name","张四");System.out.println("result="+result);String name = jedis.get("name");System.out.println("name="+name);}@Testvoid testHash(){jedis.hset("user:1","name","Jack");jedis.hset("user:1","age","21");Map<String,String> map = jedis.hgetAll("user:1");System.out.println(map);}@AfterEachvoid tearDown(){if(jedis !=null){jedis.close();}}}

三、SpringDataRedis

（1）快速入门实例：

1.引入依赖

        <!--        Redis依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency>
<!--        连接池依赖--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId></dependency>

2.在application.yml中进行配置

server:port: 8080spring:redis:host: 192.168.92.136port: 6379password: 123456lettuce:pool:max-active: 8 #最大连接max-idle: 8 #最大空闲连接min-idle: 0 #最小空闲连接max-wait: 100 #连接等待时间

3.Test中编写示例

package com.example.redisdemo;import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;@SpringBootTest
class RedisDemoApplicationTests {@Autowiredprivate RedisTemplate redisTemplate;@Testvoid testString(){redisTemplate.opsForValue().set("name","小龙");Object name = redisTemplate.opsForValue().get("name");System.out.println("name="+name);}}

（2）RedisTemplate序列化

配置序列化 config.RedisConfig

package com.example.redisdemo.config;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;@Configuration
public class RedisConfig {@Beanpublic  RedisTemplate<String,Object> redisTemplate(RedisConnectionFactory connectionFactory){RedisTemplate<String,Object> template = new RedisTemplate<>();//设置连接工厂template.setConnectionFactory(connectionFactory);//创建Json序列化工具GenericJackson2JsonRedisSerializer jsonRedisSerializer =new GenericJackson2JsonRedisSerializer();//设置Key的序列化template.setKeySerializer(RedisSerializer.string());template.setHashKeySerializer(RedisSerializer.string());//设置Value的序列化template.setValueSerializer(jsonRedisSerializer);template.setHashValueSerializer(jsonRedisSerializer);return template;}}

创建实体 pojo.User

package com.example.redisdemo.pojo;import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {private String name;private Integer age;
}

在Test中编写测试用例

package com.example.redisdemo;import com.example.redisdemo.pojo.User;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;@SpringBootTest
class RedisDemoApplicationTests {@Autowiredprivate RedisTemplate<String,Object> redisTemplate;@Testvoid testString(){redisTemplate.opsForValue().set("name","小龙");Object name = redisTemplate.opsForValue().get("name");System.out.println("name="+name);}@Testvoid testSaveUser(){redisTemplate.opsForValue().set("user:100",new User("小虎",21));User user = (User) redisTemplate.opsForValue().get("user:100");System.out.println("user="+user);}}

报错可能没有引入Jackson依赖

        <dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId></dependency>

（3）序列化的另一种方式StringRedisTemplate

示例代码：

package com.example.redisdemo;import com.example.redisdemo.pojo.User;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;import java.util.Map;@SpringBootTest
class RedisDemoApplicationTests {@Autowiredprivate StringRedisTemplate stringRedisTemplate;//Json工具private static final ObjectMapper mapper = new ObjectMapper();@Testvoid testStringTemplate() throws JsonProcessingException{User user = new User("小明",20);//手动序列化String json = mapper.writeValueAsString(user);stringRedisTemplate.opsForValue().set("user:200",json);String val = stringRedisTemplate.opsForValue().get("user:200");//反序列化User user1 = mapper.readValue(val, User.class);System.out.println("user1:"+user1);}@Testvoid testHash(){stringRedisTemplate.opsForHash().put("user:400","name","小胡");stringRedisTemplate.opsForHash().put("user:400","age","21");Map<Object,Object> entries = stringRedisTemplate.opsForHash().entries("user:400");System.out.println("entries:"+entries);}}

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