SpringBoot项目如何接入Redis集群

配置参数

因为这篇文章不介绍 Redis 集群的搭建，这里我们假设已经有了一个 Redis 的集群环境，我们项目中需要调整以下几个部分

1. 修改配置参数，集群的节点和密码配置；

2. 确保引入的 Jedis 版本支持设置密码，spring-data-redis 1.8 以上，SpringBoot 1.5 以上才支持设置密码；

3. 注入 RedisTemplate；

4. 编写工具类；

修改配置参数

############### Redis 集群配置 #########################
spring.custome.redis.cluster.nodes=172.20.0.1:7001,172.20.0.2:7002,172.20.0.3:7003
spring.custome.redis.cluster.max-redirects=3
spring.custome.redis.cluster.max-active=500
spring.custome.redis.cluster.max-wait=-1
spring.custome.redis.cluster.max-idle=500
spring.custome.redis.cluster.min-idle=20
spring.custome.redis.cluster.timeout=3000
spring.custome.redis.cluster.password=redis.cluster.password

引入依赖（如果需要）

确保  SpringBoot 的版本大于 1.4.x 如果不是的话，采用如下配置，先排除 SpringBoot 中旧版本 Jedis 和 spring-data-redis，再依赖高版本的 Jedis 和 spring-data-redis。

   
            org.springframework.boot
            spring-boot-starter-data-redis

            

            

                
                    redis.clients
                    jedis

                

                
                    org.springframework.data
                    spring-data-redis

                

            

        

        

        
            redis.clients
            jedis
            2.9.0

        

        
            org.springframework.data
            spring-data-redis
            1.8.0.RELEASE

注入 RedisTemplate

注入 RedisTemplate 我们需要三个组件，分别是JedisConnectionFactory 、RedisClusterConfiguration、JedisPoolConfig，下面是注入RedisTempalte 的代码。先根据配置创建 JedisConnectFactory 同时需要配置 RedisClusterConfiguration、JedisPoolConfig，最后将JedisConnectionFactory 返回用于创建RedisTemplate

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.connection.RedisClusterConfiguration;
import org.springframework.data.redis.connection.RedisNode;
import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;


import java.time.Duration;
import java.util.ArrayList;
import java.util.List;


public class RedisClusterConfig {


    @Bean(name = "redisTemplate")
    @Primary
    public RedisTemplate redisClusterTemplate(@Value("${spring.custome.redis.cluster.nodes}") String host,
                                     @Value("${spring.custome.redis.cluster.password}") String password,
                                     @Value("${spring.custome.redis.cluster.timeout}") long timeout,
                                     @Value("${spring.custome.redis.cluster.max-redirects}") int maxRedirect,
                                     @Value("${spring.custome.redis.cluster.max-active}") int maxActive,
                                     @Value("${spring.custome.redis.cluster.max-wait}") int maxWait,
                                     @Value("${spring.custome.redis.cluster.max-idle}") int maxIdle,
                                     @Value("${spring.custome.redis.cluster.min-idle}") int minIdle) {


        JedisConnectionFactory connectionFactory =  jedisClusterConnectionFactory(host, password,
                timeout, maxRedirect, maxActive, maxWait, maxIdle, minIdle);
        return createRedisClusterTemplate(connectionFactory);
    }


    private JedisConnectionFactory jedisClusterConnectionFactory(String host, String password,
                                                                   long timeout, int maxRedirect, int maxActive, int maxWait, int maxIdle, int minIdle) {
        RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();
        List nodeList = new ArrayList();
        String[] cNodes = host.split(",");
        //分割出集群节点
        for (String node : cNodes) {
            String[] hp = node.split(":");
            nodeList.add(new RedisNode(hp[0], Integer.parseInt(hp[1])));
        }
        redisClusterConfiguration.setClusterNodes(nodeList);
        redisClusterConfiguration.setPassword(password);
        redisClusterConfiguration.setMaxRedirects(maxRedirect);


        // 连接池通用配置
        GenericObjectPoolConfig genericObjectPoolConfig = new GenericObjectPoolConfig();
        genericObjectPoolConfig.setMaxIdle(maxIdle);
        genericObjectPoolConfig.setMaxTotal(maxActive);
        genericObjectPoolConfig.setMinIdle(minIdle);
        genericObjectPoolConfig.setMaxWaitMillis(maxWait);
        genericObjectPoolConfig.setTestWhileIdle(true);
        genericObjectPoolConfig.setTimeBetweenEvictionRunsMillis(300000);


        JedisClientConfiguration.DefaultJedisClientConfigurationBuilder builder = (JedisClientConfiguration.DefaultJedisClientConfigurationBuilder) JedisClientConfiguration
                .builder();
        builder.connectTimeout(Duration.ofSeconds(timeout));
        builder.usePooling();
        builder.poolConfig(genericObjectPoolConfig);
        JedisConnectionFactory connectionFactory = new JedisConnectionFactory(redisClusterConfiguration, builder.build());
        // 连接池初始化
        connectionFactory.afterPropertiesSet();


        return connectionFactory;
    }


    private RedisTemplate createRedisClusterTemplate(JedisConnectionFactory redisConnectionFactory) {
        RedisTemplate redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(redisConnectionFactory);


        Jackson2JsonRedisSerializer