1.新增redis啟動器

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

2.配置檔案 application.properties

#redis叢集配置

# Redis伺服器連線密碼（預設為空）
spring.redis.password=
# 連線池最大連線數（使用負值表示沒有限制）
spring.redis.pool.max-active=300
# 連線池最大阻塞等待時間（使用負值表示沒有限制）
spring.redis.pool.max-wait=1000
# 連線池中的最大空閒連線
spring.redis.pool.max-idle=300
# 連線池中的最小空閒連線
spring.redis.pool.min-idle=100
# 連線超時時間（毫秒）
spring.redis.timeout=0
spring.redis.commandTimeout=5000

# redis.cluster
spring.redis.cluster.nodes=192.168.240.128:7000,192.168.240.128:7001,192.168.240.128:7002,192.168.240.128:7003,192.168.240.128:7004,192.168.240.128:7005,192.168.240.128:7006,192.168.240.128:7007,192.168.240.128:7008
 

3.redis叢集配置類

package com.plat.springboot.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.CacheErrorHandler;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.xml.sax.ErrorHandler;
import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.JedisCluster;
import redis.clients.jedis.JedisPoolConfig;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

@Configuration
@ConditionalOnClass({JedisCluster.class})
@EnableCaching
public class redisConfig extends CachingConfigurerSupport{

    private final Logger logger = LoggerFactory.getLogger(redisConfig.class);

    @Value("${spring.redis.cluster.nodes}")
    private String clusterNodes;
    @Value("${spring.redis.timeout}")
    private int timeout;
    @Value("${spring.redis.pool.max-idle}")
    private int maxIdle;
    @Value("${spring.redis.pool.max-wait}")
    private long maxWaitMillis;
    @Value("${spring.redis.commandTimeout}")
    private int commandTimeout;

    @Bean
    public JedisCluster getJedisCluster(){
        String[] cNodes = clusterNodes.split(",");
        Set<HostAndPort> nodes = new HashSet<>();
        //分割出叢集節點
        for (String node: cNodes) {
            String[] hp = node.split(":");
            nodes.add(new HostAndPort(hp[0],Integer.parseInt(hp[1])));
        }
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxIdle(maxIdle);
        jedisPoolConfig.setMaxWaitMillis(maxWaitMillis);
        //建立叢集物件
        return new JedisCluster(nodes,commandTimeout,jedisPoolConfig);
    }

    /**
     * 設定資料存入redis 的序列化方式
     *</br>redisTemplate序列化預設使用的jdkSerializeable,儲存二進位制位元組碼,導致key會出現亂碼，所以自定義
     *序列化類
     *
     * @paramredisConnectionFactory
     */
    @Bean
    public RedisTemplate<Object,Object> redisTemplate(RedisConnectionFactory redisConnectionFactory){
        RedisTemplate<Object,Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

    /**
     * 註解@Cache key生成規則
     */
    @Bean
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            public Object generate(Object target, Method method,
                                   Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    };

    /**
     * 註解@Cache的管理器，設定過期時間的單位是秒
     *
     * @Description:
     * @param redisTemplate
     * @return
     */
    @Bean
    public CacheManager cacheManager(RedisTemplate<?, ?> redisTemplate) {
        RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
        Map<String, Long> expires = new HashMap<String, Long>();
        expires.put("users", 6000L);
        expires.put("city", 600L);
        cacheManager.setExpires(expires);
        cacheManager.setDefaultExpiration(600); // 設定key-value超時時間
        return cacheManager;
    }


    /**
    *配置當redis掛掉或者出現問題時,程式繼續向下執行操作資料庫查詢
    */
    @Bean
    @Override
    public CacheErrorHandler errorHandler() {
        CacheErrorHandler cacheErrorHandler = new CacheErrorHandler() {

            @Override
            public void handleCachePutError(RuntimeException exception, Cache cache,
                                            Object key, Object value) {
                RedisErrorException(exception, key);
            }

            @Override
            public void handleCacheGetError(RuntimeException exception, Cache cache,
                                            Object key) {
                RedisErrorException(exception, key);
            }

            @Override
            public void handleCacheEvictError(RuntimeException exception, Cache cache,
                                              Object key) {
                RedisErrorException(exception, key);
            }

            @Override
            public void handleCacheClearError(RuntimeException exception, Cache cache) {
                RedisErrorException(exception, null);
            }
        };
        return cacheErrorHandler;
    }

    protected void RedisErrorException(Exception exception,Object key){
        logger.error("redis異常：key=[{}]", key, exception);
    }
}
 

4.redis註解開發

https://www.cnblogs.com/fashflying/p/6908028.html