解决java.lang.NoClassDefFoundError: org/springframework/data/redis/connection/RedisStreamCommands

这是在 springboot 中使用 redisson 时，因为引入的依赖为

        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.14.0</version>
        </dependency>

这个依赖，通过阅读源码，可以知道其中排除了默认的 jedis 以及 lettuce。参考 

package org.redisson.spring.starter;
包下的

RedissonAutoConfiguration 
类

由于redisson-starter 的支持随着 springboot 版本的调整也有所升级，因此最新版本的 starter 基本都是 springboot2.3的依赖。所以当我们使用 springboot2.3 以下的版本时，就会出现 classnotfound

 

解决方法：

排除springboot2.3 支持，引入 springboot2.1 支持。

        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.14.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.redisson</groupId>
                    <artifactId>redisson-spring-data-23</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-data-21</artifactId>
            <version>3.14.0</version>
        </dependency>

具体 springboot 支持参考官方文档

引申：

最新 redisson-starter 因为解决了 application.yml配置文件中直接配置 redisson 的问题，也就是说我们不用再编辑一个 redisson.yml的文件来配置 redisson，这解决了使用配置中心管理配置的尴尬。

spring:
    redis:
        database: 0
        password: password
        cluster:
          nodes: 127.0.0.1:7000,127.0.0.1:7001,127.0.0.1:7002
        # Redisson settings
        redisson:
        #      file: classpath:redisson.yaml
          config: |
            clusterServersConfig:
              idleConnectionTimeout: 10000
              connectTimeout: 10000
              timeout: 3000
              retryAttempts: 3
              retryInterval: 1500
              failedSlaveReconnectionInterval: 3000
              failedSlaveCheckInterval: 60000
              password: Index1130
              subscriptionsPerConnection: 5
              clientName: redisson
              loadBalancer: !<org.redisson.connection.balancer.RoundRobinLoadBalancer> {}
              subscriptionConnectionMinimumIdleSize: 1
              subscriptionConnectionPoolSize: 50
              slaveConnectionMinimumIdleSize: 50
              slaveConnectionPoolSize: 200
              masterConnectionMinimumIdleSize: 50
              masterConnectionPoolSize: 100
              readMode: "SLAVE"
              subscriptionMode: "SLAVE"
              nodeAddresses:
                  - "redis://127.0.0.1:7002"
                  - "redis://127.0.0.1:7001"
                  - "redis://127.0.0.1:7000"
              scanInterval: 1000
              pingConnectionInterval: 0
              keepAlive: false
              tcpNoDelay: false
            threads: 0
            nettyThreads: 0
            codec: !<org.redisson.codec.MarshallingCodec> {}
            transportMode: "NIO"
            lockWatchdogTimeout: 30000

源码：

@Bean(
        destroyMethod = "shutdown"
    )
    @ConditionalOnMissingBean({RedissonClient.class})
    public RedissonClient redisson() throws IOException {
        Config config = null;
        Method clusterMethod = ReflectionUtils.findMethod(RedisProperties.class, "getCluster");
        Method timeoutMethod = ReflectionUtils.findMethod(RedisProperties.class, "getTimeout");
        Object timeoutValue = ReflectionUtils.invokeMethod(timeoutMethod, this.redisProperties);
        int timeout;
        Method nodesMethod;
        if (null == timeoutValue) {
            timeout = 10000;
        } else if (!(timeoutValue instanceof Integer)) {
            nodesMethod = ReflectionUtils.findMethod(timeoutValue.getClass(), "toMillis");
            timeout = ((Long)ReflectionUtils.invokeMethod(nodesMethod, timeoutValue)).intValue();
        } else {
            timeout = (Integer)timeoutValue;
        }

        if (this.redissonProperties.getConfig() != null) {
            try {
                config = Config.fromYAML(this.redissonProperties.getConfig());
            } catch (IOException var13) {
                try {
                    config = Config.fromJSON(this.redissonProperties.getConfig());
                } catch (IOException var12) {
                    throw new IllegalArgumentException("Can't parse config", var12);
                }
            }
        } else if (this.redissonProperties.getFile() != null) {
            try {
                InputStream is = this.getConfigStream();
                config = Config.fromYAML(is);
            } catch (IOException var11) {
                try {
                    InputStream is = this.getConfigStream();
                    config = Config.fromJSON(is);
                } catch (IOException var10) {
                    throw new IllegalArgumentException("Can't parse config", var10);
                }
            }
        } else if (this.redisProperties.getSentinel() != null) {
            nodesMethod = ReflectionUtils.findMethod(Sentinel.class, "getNodes");
            Object nodesValue = ReflectionUtils.invokeMethod(nodesMethod, this.redisProperties.getSentinel());
            String[] nodes;
            if (nodesValue instanceof String) {
                nodes = this.convert(Arrays.asList(((String)nodesValue).split(",")));
            } else {
                nodes = this.convert((List)nodesValue);
            }

            config = new Config();
            ((SentinelServersConfig)config.useSentinelServers().setMasterName(this.redisProperties.getSentinel().getMaster()).addSentinelAddress(nodes).setDatabase(this.redisProperties.getDatabase()).setConnectTimeout(timeout)).setPassword(this.redisProperties.getPassword());
        } else {
            Method method;
            if (clusterMethod != null && ReflectionUtils.invokeMethod(clusterMethod, this.redisProperties) != null) {
                Object clusterObject = ReflectionUtils.invokeMethod(clusterMethod, this.redisProperties);
                method = ReflectionUtils.findMethod(clusterObject.getClass(), "getNodes");
                List<String> nodesObject = (List)ReflectionUtils.invokeMethod(method, clusterObject);
                String[] nodes = this.convert(nodesObject);
                config = new Config();
                ((ClusterServersConfig)config.useClusterServers().addNodeAddress(nodes).setConnectTimeout(timeout)).setPassword(this.redisProperties.getPassword());
            } else {
                config = new Config();
                String prefix = "redis://";
                method = ReflectionUtils.findMethod(RedisProperties.class, "isSsl");
                if (method != null && (Boolean)ReflectionUtils.invokeMethod(method, this.redisProperties)) {
                    prefix = "rediss://";
                }

                ((SingleServerConfig)config.useSingleServer().setAddress(prefix + this.redisProperties.getHost() + ":" + this.redisProperties.getPort()).setConnectTimeout(timeout)).setDatabase(this.redisProperties.getDatabase()).setPassword(this.redisProperties.getPassword());
            }
        }

        if (this.redissonAutoConfigurationCustomizers != null) {
            Iterator var19 = this.redissonAutoConfigurationCustomizers.iterator();

            while(var19.hasNext()) {
                RedissonAutoConfigurationCustomizer customizer = (RedissonAutoConfigurationCustomizer)var19.next();
                customizer.customize(config);
            }
        }

        return Redisson.create(config);
    }

# 当我们配置了spring.redis.redisson.config这个属性时，会优先以此属性为 redisson 配置
    if (this.redissonProperties.getConfig() != null) {
            try {
                config = Config.fromYAML(this.redissonProperties.getConfig());
            } catch (IOException var13) {
                try {
                    config = Config.fromJSON(this.redissonProperties.getConfig());
                } catch (IOException var12) {
                    throw new IllegalArgumentException("Can't parse config", var12);
                }
            }
        }

官方链接 配置

redisson 各种配置项以及集群 哨兵 单机配置，参考 redisson 官方文档 集群配置

 

由于目前网上，此类解决办法，全是千篇一律的直接降级 redisson-starter 的文章，希望各位朋友使用一个东西遇到问题的时候，首先看官方的 github，其次自己尝试阅读源码。当你选择降级的时候，你可能选择的是舍弃了最新的某些功能以及支持。