关于SpringBoot集成Lettuce连接Redis的方法和案例
作者：帅气的梧桐述
这篇文章主要介绍了关于SpringBoot集成Lettuce连接Redis的方法和案例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧
首先使用maven在pom.xml添加如下依赖
说明：
- SpringBoot从2.0起默认使用lettuce客户端进行连接。
- 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连接实例
Springboot+Lettuce单连方式连接Redis单机/主备/Proxy集群示例。
1、在application.properties配置文件中加上redis相关配置。
spring.redis.host=host spring.redis.database=0 spring.redis.password=pwd spring.redis.port=port
2、Redis配置类RedisConfiguration。
@Bean
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(lettuceConnectionFactory);
//使用Jackson2JsonRedisSerializer替换默认的JdkSerializationRedisSerializer来序列化和反序列化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操作类RedisUtil。
/**
* 普通缓存获取
* @param key 键
* @return 值
*/
public Object get(String key){
return key==null?null:redisTemplate.opsForValue().get(key);
}
/**
* 普通缓存放入
* @param key 键
* @param value 值
* @return true成功 false失败
*/
public boolean set(String key,Object value) {
try {
redisTemplate.opsForValue().set(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}4、编写controller类进行测试。
@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连接池方式连接Redis单机/主备/Proxy集群示例。
1、在上边maven依赖的基础上添加以下依赖。
<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency>
2、在application.properties配置文件中加上redis相关配置。
spring.redis.host=host spring.redis.database=0 spring.redis.password=pwd spring.redis.port=port # 连接超时时间 spring.redis.timeout=1000 # 连接池最大连接数（使用负值表示没有限制） spring.redis.lettuce.pool.max-active=50 # 连接池中的最小空闲连接 spring.redis.lettuce.pool.min-idle=5 # 连接池中的最大空闲连接 spring.redis.lettuce.pool.max-idle=50 # 连接池最大阻塞等待时间（使用负值表示没有限制） spring.redis.lettuce.pool.max-wait=5000 #eviction线程调度时间间隔 spring.redis.pool.time-between-eviction-runs-millis=2000
这里最后的这个配置：spring.redis.pool.time-between-eviction-runs-millis=2000 在某些版本中会不生效，需要自己DEBUG看一下
LettuceConnectionFactory
实例里边有没设置成功，如果没有则调整成如下配置：
spring.redis.lettuce.pool.time-between-eviction-runs=2000
3、Redis连接配置类RedisConfiguration。
@Bean
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {
lettuceConnectionFactory.setShareNativeConnection(false);
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(lettuceConnectionFactory);
//使用Jackson2JsonRedisSerializer替换默认的JdkSerializationRedisSerializer来序列化和反序列化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单连接方式连接Redis Cluster集群代码示例。
1、在application.properties配置文件中加上redis相关配置。
spring.redis.cluster.nodes=host:port spring.redis.cluster.max-redirects=3 spring.redis.password= pwd # 自动刷新时间 spring.redis.lettuce.cluster.refresh.period=60 # 开启自适应刷新 spring.redis.lettuce.cluster.refresh.adaptive=true spring.redis.timeout=60
2、Redis配置类RedisConfiguration，请务必开启集群自动刷新拓扑配置。
@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);
// 配置集群自动刷新拓扑
ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()
.enablePeriodicRefresh(Duration.ofSeconds(period)) //按照周期刷新拓扑
.enableAllAdaptiveRefreshTriggers() //根据事件刷新拓扑
.build();
ClusterClientOptions clusterClientOptions = ClusterClientOptions.builder()
//redis命令超时时间,超时后才会使用新的拓扑信息重新建立连接
.timeoutOptions(TimeoutOptions.enabled(Duration.ofSeconds(period)))
.topologyRefreshOptions(topologyRefreshOptions)
.build();
LettuceClientConfiguration clientConfig = LettucePoolingClientConfiguration.builder()
.commandTimeout(Duration.ofSeconds(timeout))
.readFrom(ReadFrom.REPLICA_PREFERRED) // 优先从副本读取
.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替换默认的JdkSerializationRedisSerializer来序列化和反序列化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连接池方式连接Redis Cluster集群代码示例。
1、在application.properties配置文件中加上Redis相关配置。
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 # 连接超时时间 spring.redis.timeout=60s # 连接池最大连接数（使用负值表示没有限制） spring.redis.lettuce.pool.max-active=50 # 连接池中的最小空闲连接 spring.redis.lettuce.pool.min-idle=5 # 连接池中的最大空闲连接 spring.redis.lettuce.pool.max-idle=50 # 连接池最大阻塞等待时间（使用负值表示没有限制） spring.redis.lettuce.pool.max-wait=5000 #eviction线程调度时间间隔 spring.redis.lettuce.pool.time-between-eviction-runs=2000
2、redis配置类RedisConfiguration，请务必开启集群自动刷新拓扑配置。
@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);
// 配置集群自动刷新拓扑
ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()
.enablePeriodicRefresh(Duration.ofSeconds(period)) //按照周期刷新拓扑
.enableAllAdaptiveRefreshTriggers() //根据事件刷新拓扑
.build();
ClusterClientOptions clusterClientOptions = ClusterClientOptions.builder()
//redis命令超时时间,超时后才会使用新的拓扑信息重新建立连接
.timeoutOptions(TimeoutOptions.enabled(Duration.ofSeconds(period)))
.topologyRefreshOptions(topologyRefreshOptions)
.build();
LettuceClientConfiguration clientConfig = LettucePoolingClientConfiguration.builder()
.commandTimeout(Duration.ofSeconds(timeout))
.poolConfig(genericObjectPoolConfig)
.readFrom(ReadFrom.REPLICA_PREFERRED) // 优先从副本读取
.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替换默认的JdkSerializationRedisSerializer来序列化和反序列化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;
} 推荐使用连接池方式。
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