SpringBoot系列之集成Jedis教程

SpringBoot系列之集成Jedis教程，Jedis是老牌的redis客户端框架，提供了比较齐全的redis使用命令，是一款开源的Java 客户端框架，本文使用Jedis3.1.0加上Springboot2.0，配合spring-boot-starter-data-redis使用，只给出简单的使用demo

软件环境：

JDK 1.8
SpringBoot 2.2.1
Maven 3.2+
Mysql 8.0.26
spring-boot-starter-data-redis 2.2.1
jedis3.1.0
开发工具
- IntelliJ IDEA
- smartGit

项目搭建

使用Spring官网的https://start.spring.io快速创建Spring Initializr项目
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选择maven、jdk版本

选择需要的Dependencies，选择一下Spring Data Redis
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点击next就可以生成一个Springboot项目，不过jedis客户端配置还是要自己加的，所以对pom文件做简单的修改，spring-boot-starter-data-redis默认使用lettuce，所以不用的可以exclusion，然后再加上jedis的配置

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <exclusions>
        <exclusion>
            <groupId>io.lettuce</groupId>
            <artifactId>lettuce-core</artifactId>
        </exclusion>
    </exclusions>
</dependency>

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

新建一个application.yml配置文件，加上redis一些配置

spring:
  redis:
    port: 6379
    host: 127.0.0.1
    password:
    timeout: 3000
    database: 1
    jedis:
      pool:
        max-idle: 8
        max-active: 8
        min-idle: 2

新增Redis配置，配置RedisConnectionFactory 为JedisConnectionFactory，JedisPool，RedisTemplate需要用到也可以配置一下

package com.example.jedis.configuration;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.pool2.impl.GenericObjectPool;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.jedis.JedisConnection;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.repository.configuration.EnableRedisRepositories;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

@Configuration
@ConditionalOnClass({GenericObjectPool.class, JedisConnection.class, Jedis.class})
@EnableRedisRepositories(basePackages = "com.example.jedis.repository")
@Slf4j
public class RedisConfiguration {
    @Bean
    public JedisPoolConfig jedisPoolConfig() {
        return new JedisPoolConfig();
    }

    @Bean
    public JedisPool jedisPool() {
      return new JedisPool(jedisPoolConfig());
    }
    
    @Bean
    public RedisConnectionFactory jedisConnectionFactory() {
        return new JedisConnectionFactory();
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
        template.setConnectionFactory(jedisConnectionFactory());
        template.setKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        return template;
    }
}

写一个实体类，@RedisHash定义存储的hash key

package com.example.jedis.model;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;
import lombok.experimental.SuperBuilder;
import org.springframework.data.redis.core.RedisHash;

import java.io.Serializable;

@RedisHash("user")
@Data
@SuperBuilder(toBuilder = true)
@EqualsAndHashCode
@AllArgsConstructor
@NoArgsConstructor
public class UserDto implements Serializable {


    private static final long serialVersionUID = 5962011647926411830L;

    public enum Gender {
        MALE, FEMALE
    }

    private Long id;
    private String name;
    private Gender gender;

}

使用Sping Data Redis的API来实现一个CRUD接口

package com.example.jedis.repository;


import com.example.jedis.model.UserDto;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends CrudRepository<UserDto, Long> {
}

写一个测试类来进行测试，ContextConfiguration指定一个配置类

package com.example.jedis;

import cn.hutool.core.util.IdUtil;
import com.example.jedis.configuration.RedisConfiguration;
import com.example.jedis.model.UserDto;
import com.example.jedis.repository.UserRepository;
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.test.annotation.DirtiesContext;
import org.springframework.test.context.ContextConfiguration;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

@SpringBootTest
@ContextConfiguration(classes = RedisConfiguration.class)
@DirtiesContext(classMode = DirtiesContext.ClassMode.BEFORE_CLASS)
class SpringbootJedisApplicationTests {

    @Autowired
    JedisPool jedisPool;
    @Autowired
    RedisTemplate redisTemplate;
    @Autowired
    UserRepository userRepository;

    @Test
    void contextLoads() {
        Jedis jedis= jedisPool.getResource();
        jedis.set("tKey","你好呀");
        jedis.close();

    }

    @Test
    void testRedisTemplate() {
        redisTemplate.opsForValue().set("rtKey","你好呀");
    }

    @Test
    void testCrud() {
        final UserDto userDto = UserDto.builder()
                .id(IdUtil.getSnowflake().nextId())
                .name("用户1")
                .gender(UserDto.Gender.MALE)
                .build();
        userRepository.save(userDto);
    }

}