redis整合springboot(lettuce方式)

redis安装按网上教程简单方便既可成功

redis部署

启动方式很多，本人习惯:redis-server /redis/redis.conf [配置文件路径]

创建或导入一个springboot项目

导入依赖

        
            org.springframework.boot
            spring-boot-starter-data-redis
        
        
        
            org.apache.commons
            commons-pool2
        

redis配置文件

package com.arcc.common.config;


import com.arcc.common.utils.MessageReceiver;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.listener.PatternTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.lang.reflect.Method;

@Slf4j
@Configuration
public class RedisConfig  extends CachingConfigurerSupport {
    /**
     * 自定义缓存key的生成策略。默认的生成策略是看不懂的(乱码内容) 通过Spring 的依赖注入特性进行自定义的配置注入并且此类是一个配置类可以更多程度的自定义配置
     *
     * @return
     */
    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            @Override
            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();
            }
        };
    }

    /**
     * 缓存配置管理器
     */
    @Bean
    public CacheManager cacheManager(LettuceConnectionFactory factory) {
        //以锁写入的方式创建RedisCacheWriter对象
        RedisCacheWriter writer = RedisCacheWriter.lockingRedisCacheWriter(factory);
        /*
        设置CacheManager的Value序列化方式为JdkSerializationRedisSerializer,
        但其实RedisCacheConfiguration默认就是使用
        StringRedisSerializer序列化key，
        JdkSerializationRedisSerializer序列化value,
        所以以下注释代码就是默认实现，没必要写，直接注释掉
         */
        // RedisSerializationContext.SerializationPair pair = RedisSerializationContext.SerializationPair.fromSerializer(new JdkSerializationRedisSerializer(this.getClass().getClassLoader()));
        // RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().serializeValuesWith(pair);
        //创建默认缓存配置对象
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        RedisCacheManager cacheManager = new RedisCacheManager(writer, config);
        log.info("RedisCacheManager加载完成");
        return cacheManager;
    }

    @Bean
    public RedisTemplate redisTemplate(LettuceConnectionFactory factory){
        RedisTemplate template = new RedisTemplate <>();
        template.setConnectionFactory(factory);

        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();

        // 在使用注解@Bean返回RedisTemplate的时候，同时配置hashKey与hashValue的序列化方式。
        // key采用String的序列化方式
        template.setKeySerializer(stringRedisSerializer);
        // value序列化方式采用jackson
        template.setValueSerializer(jackson2JsonRedisSerializer);

        // hash的key也采用String的序列化方式
        template.setHashKeySerializer(stringRedisSerializer);
        // hash的value序列化方式采用jackson
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        log.info("RedisTemplate加载完成");
        return template;
    }

    @Bean
    public RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,
                                                   MessageListenerAdapter listenerAdapter){
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.addMessageListener(listenerAdapter,new PatternTopic("topic"));
        log.info("RedisContainer加载完成");
        return container;
    }

    /**
     * 绑定消息监听者和接收监听的方法,必须要注入这个监听器，不然会报错
     */
    @Bean
    public MessageListenerAdapter listenerAdapter(){
        //这个地方 是给messageListenerAdapter 传入一个消息接受的处理器，利用反射的方法调用“receiveMessage”
        //也有好几个重载方法，这边默认调用处理器的方法 叫handleMessage 可
        log.info("RedisListenerAdapter加载完成");
        return new MessageListenerAdapter(new MessageReceiver(),"receiveMessage");
    }

}

spring:
 redis:
    #数据库索引
    database: 0
    #服务器地址
    host: ***.***.***.***
    #切换Ip部署时，同时修改redis.conf中的bind
    #host: 127.0.0.1
    #服务器连接端口号
    port: 6379
    #服务器连接密码默认为空
    password:
    lettuce:
      pool:
        #连接池最大连接数(使用负值表示没有限制) 默认8
        max-active: 8
        #连接池最大阻塞等待时间(使用负值表示没有限制) 默认-1
        max-wait: -1
        #连接池中的最大空闲连接 默认8
        max-idle: 8
        #连接池中的最小空闲连接 默认0
        min-idle: 0

注意事项：

测试时，代码在本地，redis在服务器上，则redis配置文件conf中bind 127.0.0.1需要注释，否则绑定后不在同一台服务器无法连接
redis部署配置文件中protected-mode 参数yes改为no,取消受保护模式，否则会报如下错误
Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients