SpringBoot2.0默認採用Lettuce客戶端來連接Redis服務端的.默認是不使用連接池的,只有配置 redis.lettuce.pool下的屬性的時候纔可以使用到redis連接池。
導入依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
配置文件
# Redis數據庫索引(默認爲0)
spring.redis.database=0
# Redis服務器地址
[email protected]@
# Redis服務器連接端口
[email protected]@
# Redis服務器連接密碼(默認爲空)
[email protected]@
# 連接超時時間(毫秒)
spring.redis.timeout=20000
# 連接池最大連接數(使用負值表示沒有限制)
spring.redis.lettuce.pool.max-active=500
# 連接池最大阻塞等待時間(使用負值表示沒有限制)
spring.redis.lettuce.pool.max-wait=-1
# 連接池中的最大空閒連接
spring.redis.lettuce.pool.max-idle=10
# 連接池中的最小空閒連接
spring.redis.lettuce.pool.min-idle=0
配置類
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
@Configuration
public class RedisConfig {
@Autowired
private RedisConnectionFactory factory;
@Value("${spring.redis.lettuce.pool.min-idle}")
private int corePoolSize;
@Value("${spring.redis.lettuce.pool.max-active}")
private int maxPoolSize;
/**
* 用於spring session,防止每次創建一個線程
* @return
*/
@Bean
public ThreadPoolTaskExecutor springSessionRedisTaskExecutor() {
ThreadPoolTaskExecutor springSessionRedisTaskExecutor = new ThreadPoolTaskExecutor();
springSessionRedisTaskExecutor.setCorePoolSize(corePoolSize);
springSessionRedisTaskExecutor.setMaxPoolSize(maxPoolSize);
// springSessionRedisTaskExecutor.setKeepAliveSeconds(10);
// springSessionRedisTaskExecutor.setQueueCapacity(1000);
springSessionRedisTaskExecutor.setThreadNamePrefix("Spring session redis executor thread: ");
return springSessionRedisTaskExecutor;
}
@Bean
@SuppressWarnings("all")
public RedisTemplate<String, Object> redisTemplate() {
RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
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();
// key採用String的序列化方式
template.setKeySerializer(stringRedisSerializer);
// hash的key也採用String的序列化方式
template.setHashKeySerializer(stringRedisSerializer);
// value序列化方式採用jackson
template.setValueSerializer(jackson2JsonRedisSerializer);
// hash的value序列化方式採用jackson
template.setHashValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}
Redis使用
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ZSetOperations.TypedTuple;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
@Slf4j
@Component
public class RedisUtil {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
/**
* 指定緩存失效時間
* @param key 鍵
* @param time 時間(秒)
* @return
*/
public boolean expire(String key, long time) {
try {
if (time > 0) {
redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
log.error(e.getMessage());
return false;
}
}
/**
* 根據key 獲取過期時間
* @param key 鍵 不能爲null
* @return 時間(秒) 返回0代表爲永久有效
*/
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/**
* 判斷key是否存在
* @param key 鍵
* @return true 存在 false不存在
*/
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
log.error(e.getMessage());
return false;
}
}
}
檢查是否配置好連接池
在啓動項目時debug查看ConnectionFactory的信息,如果連接池生效,則其中的connectionProvider中有poolconfig(連接池的信息)