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關(guān)于SpringBoot集成Lettuce連接Redis的方法和案例

 更新時(shí)間：2023年04月22日 09:09:55   作者：帥氣的梧桐述  
這篇文章主要介紹了關(guān)于SpringBoot集成Lettuce連接Redis的方法和案例,文中通過示例代碼介紹的非常詳細(xì)，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

首先使用maven在pom.xml添加如下依賴

說明：

  • SpringBoot從2.0起默認(rèn)使用lettuce客戶端進(jìn)行連接。
  • 此次使用的版本：springboot：2.6.6，lettuce：6.1.8。
<dependency> 
  <groupId>org.springframework.boot</groupId>  
  <artifactId>spring-boot-starter-web</artifactId>  
</dependency>
<dependency>
  <groupId>org.springframework.boot</groupId>  
  <artifactId>spring-boot-starter-data-redis</artifactId>  
</dependency>

 使用SpringBoot集成Lettuce連接實(shí)例

Springboot+Lettuce單連方式連接Redis單機(jī)/主備/Proxy集群示例。

1、在application.properties配置文件中加上redis相關(guān)配置。 

spring.redis.host=host  
spring.redis.database=0  
spring.redis.password=pwd 
spring.redis.port=port

2、Redis配置類RedisConfiguration。

@Bean  
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {   
    RedisTemplate<String, Object> template = new RedisTemplate<>();  
    template.setConnectionFactory(lettuceConnectionFactory);  
    //使用Jackson2JsonRedisSerializer替換默認(rèn)的JdkSerializationRedisSerializer來序列化和反序列化redis的value值  
    Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);  
    ObjectMapper mapper = new ObjectMapper();  
    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);  
    mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance,  
        ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);  
    jackson2JsonRedisSerializer.setObjectMapper(mapper);  
    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();  
    //key采用String的序列化方式  
    template.setKeySerializer(stringRedisSerializer);  
    // hash的key也采用String的序列化方式  
    template.setHashKeySerializer(stringRedisSerializer);  
    // value序列化方式采用jackson  
    template.setValueSerializer(jackson2JsonRedisSerializer);  
    // hash的value序列化方式采用jackson  
    template.setHashValueSerializer(jackson2JsonRedisSerializer);  
    template.afterPropertiesSet();  
    return template;  
}

3、Redis操作類RedisUtil。

 /** 
  * 普通緩存獲取 
  * @param key 鍵 
  * @return 值 
  */  
 public Object get(String key){  
     return key==null?null:redisTemplate.opsForValue().get(key);  
 }  
 
 /** 
  * 普通緩存放入 
  * @param key 鍵 
  * @param value 值 
  * @return true成功 false失敗 
  */  
 public boolean set(String key,Object value) {  
     try {  
         redisTemplate.opsForValue().set(key, value);  
         return true;  
     } catch (Exception e) {  
         e.printStackTrace();  
         return false;  
     }  
 }

4、編寫controller類進(jìn)行測試。

@RestController  
public class HelloRedis {  
    @Autowired  
    RedisUtil redisUtil;  
 
 
    @RequestMapping("/setParams")  
    @ResponseBody  
    public String setParams(String name) {  
	    redisUtil.set("name", name);  
	    return "success";  
	}  
	
    @RequestMapping("/getParams")  
    @ResponseBody  
    public String getParams(String name) {  
	   System.out.println("--------------" + name + "-------------");  
	   String retName = redisUtil.get(name) + "";  
	   return retName;  
	}  
	
}

SpringBoot+Lettuce連接池方式連接Redis單機(jī)/主備/Proxy集群示例。

 1、在上邊maven依賴的基礎(chǔ)上添加以下依賴。

<dependency>  
  <groupId>org.apache.commons</groupId>  
  <artifactId>commons-pool2</artifactId>  
</dependency>

2、在application.properties配置文件中加上redis相關(guān)配置。

spring.redis.host=host  
spring.redis.database=0  
spring.redis.password=pwd  
spring.redis.port=port  
# 連接超時(shí)時(shí)間  
spring.redis.timeout=1000  
# 連接池最大連接數(shù)（使用負(fù)值表示沒有限制）  
spring.redis.lettuce.pool.max-active=50  
# 連接池中的最小空閑連接  
spring.redis.lettuce.pool.min-idle=5  
# 連接池中的最大空閑連接  
spring.redis.lettuce.pool.max-idle=50  
# 連接池最大阻塞等待時(shí)間（使用負(fù)值表示沒有限制）  
spring.redis.lettuce.pool.max-wait=5000  
#eviction線程調(diào)度時(shí)間間隔  
spring.redis.pool.time-between-eviction-runs-millis=2000

 這里最后的這個(gè)配置：spring.redis.pool.time-between-eviction-runs-millis=2000 在某些版本中會不生效，需要自己DEBUG看一下

LettuceConnectionFactory

實(shí)例里邊有沒設(shè)置成功，如果沒有則調(diào)整成如下配置：

spring.redis.lettuce.pool.time-between-eviction-runs=2000

3、Redis連接配置類RedisConfiguration。

@Bean  
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {  
    lettuceConnectionFactory.setShareNativeConnection(false);  
    RedisTemplate<String, Object> template = new RedisTemplate<>();  
    template.setConnectionFactory(lettuceConnectionFactory);  
    //使用Jackson2JsonRedisSerializer替換默認(rèn)的JdkSerializationRedisSerializer來序列化和反序列化redis的value值  
    Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);  
    ObjectMapper mapper = new ObjectMapper();  
    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);  
    mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance,  
        ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);  
    jackson2JsonRedisSerializer.setObjectMapper(mapper);  
    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();  
    //key采用String的序列化方式  
    template.setKeySerializer(stringRedisSerializer);  
    // hash的key也采用String的序列化方式  
    template.setHashKeySerializer(stringRedisSerializer);  
    // value序列化方式采用jackson  
    template.setValueSerializer(jackson2JsonRedisSerializer);  
    // hash的value序列化方式采用jackson  
    template.setHashValueSerializer(jackson2JsonRedisSerializer);  
    template.afterPropertiesSet();  
    return template;  
}

SpringBoot+Lettuce單連接方式連接Redis Cluster集群代碼示例。

1、在application.properties配置文件中加上redis相關(guān)配置。

spring.redis.cluster.nodes=host:port  
spring.redis.cluster.max-redirects=3  
spring.redis.password= pwd 
# 自動(dòng)刷新時(shí)間 
spring.redis.lettuce.cluster.refresh.period=60
# 開啟自適應(yīng)刷新  
spring.redis.lettuce.cluster.refresh.adaptive=true  
spring.redis.timeout=60

2、Redis配置類RedisConfiguration，請務(wù)必開啟集群自動(dòng)刷新拓?fù)渑渲谩?/strong>

@Bean  
public LettuceConnectionFactory lettuceConnectionFactory() {  
     String[] nodes = clusterNodes.split(",");  
     List<RedisNode> listNodes = new ArrayList();  
     for (String node : nodes) {  
         String[] ipAndPort = node.split(":");  
         RedisNode redisNode = new RedisNode(ipAndPort[0], Integer.parseInt(ipAndPort[1]));  
         listNodes.add(redisNode);  
     }  
     RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();  
     redisClusterConfiguration.setClusterNodes(listNodes);  
     redisClusterConfiguration.setPassword(password);  
     redisClusterConfiguration.setMaxRedirects(maxRedirects);  
      // 配置集群自動(dòng)刷新拓?fù)?
     ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()  
         .enablePeriodicRefresh(Duration.ofSeconds(period)) //按照周期刷新拓?fù)? 
         .enableAllAdaptiveRefreshTriggers() //根據(jù)事件刷新拓?fù)? 
         .build();  
 
     ClusterClientOptions clusterClientOptions = ClusterClientOptions.builder()  
         //redis命令超時(shí)時(shí)間,超時(shí)后才會使用新的拓?fù)湫畔⒅匦陆⑦B接  
         .timeoutOptions(TimeoutOptions.enabled(Duration.ofSeconds(period)))  
         .topologyRefreshOptions(topologyRefreshOptions)  
         .build();  
     LettuceClientConfiguration clientConfig = LettucePoolingClientConfiguration.builder()  
             .commandTimeout(Duration.ofSeconds(timeout))   
             .readFrom(ReadFrom.REPLICA_PREFERRED) // 優(yōu)先從副本讀取  
             .clientOptions(clusterClientOptions)  
             .build();  
     LettuceConnectionFactory factory = new LettuceConnectionFactory(redisClusterConfiguration, clientConfig);  
     return factory;  
}  
 
@Bean  
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {  
    RedisTemplate<String, Object> template = new RedisTemplate<>();  
    template.setConnectionFactory(lettuceConnectionFactory);  
    //使用Jackson2JsonRedisSerializer替換默認(rèn)的JdkSerializationRedisSerializer來序列化和反序列化redis的value值  
    Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);  
    ObjectMapper mapper = new ObjectMapper();  
    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);  
    mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance,  
        ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);  
    jackson2JsonRedisSerializer.setObjectMapper(mapper);  
    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();  
    //key采用String的序列化方式  
    template.setKeySerializer(stringRedisSerializer);  
    // hash的key也采用String的序列化方式  
    template.setHashKeySerializer(stringRedisSerializer);  
    // value序列化方式采用jackson  
    template.setValueSerializer(jackson2JsonRedisSerializer);  
    // hash的value序列化方式采用jackson  
    template.setHashValueSerializer(jackson2JsonRedisSerializer);  
    template.afterPropertiesSet();  
    return template;  
}

springboot+lettuce連接池方式連接Redis Cluster集群代碼示例。

1、在application.properties配置文件中加上Redis相關(guān)配置。

spring.redis.cluster.nodes=host:port  
spring.redis.cluster.max-redirects=3  
spring.redis.password=pwd 
spring.redis.lettuce.cluster.refresh.period=60  
spring.redis.lettuce.cluster.refresh.adaptive=true  
# 連接超時(shí)時(shí)間 
spring.redis.timeout=60s   
# 連接池最大連接數(shù)（使用負(fù)值表示沒有限制）  
spring.redis.lettuce.pool.max-active=50  
# 連接池中的最小空閑連接  
spring.redis.lettuce.pool.min-idle=5  
# 連接池中的最大空閑連接  
spring.redis.lettuce.pool.max-idle=50  
# 連接池最大阻塞等待時(shí)間（使用負(fù)值表示沒有限制）  
spring.redis.lettuce.pool.max-wait=5000  
#eviction線程調(diào)度時(shí)間間隔  
spring.redis.lettuce.pool.time-between-eviction-runs=2000

2、redis配置類RedisConfiguration，請務(wù)必開啟集群自動(dòng)刷新拓?fù)渑渲谩?/strong>

@Bean  
 public LettuceConnectionFactory lettuceConnectionFactory() {  
     GenericObjectPoolConfig genericObjectPoolConfig = new GenericObjectPoolConfig();  
     genericObjectPoolConfig.setMaxIdle(maxIdle);  
     genericObjectPoolConfig.setMinIdle(minIdle);  
     genericObjectPoolConfig.setMaxTotal(maxActive);  
     genericObjectPoolConfig.setMaxWait(Duration.ofMillis(maxWait));  
     genericObjectPoolConfig.setTimeBetweenEvictionRuns(Duration.ofMillis(timeBetweenEvictionRunsMillis));  
     String[] nodes = clusterNodes.split(",");  
     List<RedisNode> listNodes = new ArrayList();  
     for (String node : nodes) {  
         String[] ipAndPort = node.split(":");  
         RedisNode redisNode = new RedisNode(ipAndPort[0], Integer.parseInt(ipAndPort[1]));  
         listNodes.add(redisNode);  
     }  
     RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();  
     redisClusterConfiguration.setClusterNodes(listNodes);  
     redisClusterConfiguration.setPassword(password);  
     redisClusterConfiguration.setMaxRedirects(maxRedirects);  
      // 配置集群自動(dòng)刷新拓?fù)?
     ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()  
         .enablePeriodicRefresh(Duration.ofSeconds(period)) //按照周期刷新拓?fù)? 
         .enableAllAdaptiveRefreshTriggers() //根據(jù)事件刷新拓?fù)? 
         .build();  
 
     ClusterClientOptions clusterClientOptions = ClusterClientOptions.builder()  
         //redis命令超時(shí)時(shí)間,超時(shí)后才會使用新的拓?fù)湫畔⒅匦陆⑦B接  
         .timeoutOptions(TimeoutOptions.enabled(Duration.ofSeconds(period)))  
         .topologyRefreshOptions(topologyRefreshOptions)  
         .build();  
     LettuceClientConfiguration clientConfig = LettucePoolingClientConfiguration.builder()  
             .commandTimeout(Duration.ofSeconds(timeout))  
             .poolConfig(genericObjectPoolConfig)  
             .readFrom(ReadFrom.REPLICA_PREFERRED) // 優(yōu)先從副本讀取  
             .clientOptions(clusterClientOptions)  
             .build();  
     LettuceConnectionFactory factory = new LettuceConnectionFactory(redisClusterConfiguration, clientConfig);  
     return factory;  
 }  
 
@Bean  
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {  
    lettuceConnectionFactory.setShareNativeConnection(false);  
    RedisTemplate<String, Object> template = new RedisTemplate<>();  
    template.setConnectionFactory(lettuceConnectionFactory);  
    //使用Jackson2JsonRedisSerializer替換默認(rèn)的JdkSerializationRedisSerializer來序列化和反序列化redis的value值  
    Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);  
    ObjectMapper mapper = new ObjectMapper();  
    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);  
    mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance,  
        ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);  
    jackson2JsonRedisSerializer.setObjectMapper(mapper);  
    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();  
    //key采用String的序列化方式  
    template.setKeySerializer(stringRedisSerializer);  
    // hash的key也采用String的序列化方式  
    template.setHashKeySerializer(stringRedisSerializer);  
    // value序列化方式采用jackson  
    template.setValueSerializer(jackson2JsonRedisSerializer);  
    // hash的value序列化方式采用jackson  
    template.setHashValueSerializer(jackson2JsonRedisSerializer);  
    template.afterPropertiesSet();  
    return template;  
}

推薦使用連接池方式。

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