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RedisTemplate

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org.springframework.data.redis.core.RedisTemplate

依赖

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<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
<version>1.5.6.RELEASE</version>
</dependency>

配置

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# Redis数据库索引(默认为0)
spring.redis.database=0
# Redis服务器地址
spring.redis.host=127.0.0.1
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码(默认为空)
spring.redis.password=
# 连接池最大连接数(使用负值表示没有限制)
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间(使用负值表示没有限制)
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间(毫秒)
spring.redis.timeout=0

注入Bean

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@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig {

@Bean
@ConditionalOnMissingBean(name = "redisTemplate")
public RedisTemplate<Object, Object> redisTemplate(
RedisConnectionFactory redisConnectionFactory) {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
//使用fastjson序列化
FastJsonRedisSerializer fastJsonRedisSerializer = new FastJsonRedisSerializer(Object.class);
// value值的序列化采用fastJsonRedisSerializer
template.setValueSerializer(fastJsonRedisSerializer);
template.setHashValueSerializer(fastJsonRedisSerializer);
// key的序列化采用StringRedisSerializer
template.setKeySerializer(new StringRedisSerializer());
template.setHashKeySerializer(new StringRedisSerializer());
template.setConnectionFactory(redisConnectionFactory);
return template;
}

@Bean
@ConditionalOnMissingBean(StringRedisTemplate.class)
public StringRedisTemplate stringRedisTemplate(
RedisConnectionFactory redisConnectionFactory) {
StringRedisTemplate template = new StringRedisTemplate();
template.setConnectionFactory(redisConnectionFactory);
return template;
}

}

使用

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@Component
public class RedisService {
@Autowired
private RedisTemplate<String, String> redisTemplate;
/**
* 默认过期时长,单位:秒
*/
public static final long DEFAULT_EXPIRE = 60 * 60 * 24;

/**
* 不设置过期时长
*/
public static final long NOT_EXPIRE = -1;

public boolean existsKey(String key) {
return redisTemplate.hasKey(key);
}

/**
* 重名名key,如果newKey已经存在,则newKey的原值被覆盖
*
* @param oldKey
* @param newKey
*/
public void renameKey(String oldKey, String newKey) {
redisTemplate.rename(oldKey, newKey);
}

/**
* newKey不存在时才重命名
*
* @param oldKey
* @param newKey
* @return 修改成功返回true
*/
public boolean renameKeyNotExist(String oldKey, String newKey) {
return redisTemplate.renameIfAbsent(oldKey, newKey);
}

/**
* 删除key
*
* @param key
*/
public void deleteKey(String key) {
redisTemplate.delete(key);
}

/**
* 删除多个key
*
* @param keys
*/
public void deleteKey(String... keys) {
Set<String> kSet = Stream.of(keys).map(k -> k).collect(Collectors.toSet());
redisTemplate.delete(kSet);
}

/**
* 删除Key的集合
*
* @param keys
*/
public void deleteKey(Collection<String> keys) {
Set<String> kSet = keys.stream().map(k -> k).collect(Collectors.toSet());
redisTemplate.delete(kSet);
}

/**
* 设置key的生命周期
*
* @param key
* @param time
* @param timeUnit
*/
public void expireKey(String key, long time, TimeUnit timeUnit) {
redisTemplate.expire(key, time, timeUnit);
}

/**
* 指定key在指定的日期过期
*
* @param key
* @param date
*/
public void expireKeyAt(String key, Date date) {
redisTemplate.expireAt(key, date);
}

/**
* 查询key的生命周期
*
* @param key
* @param timeUnit
* @return
*/
public long getKeyExpire(String key, TimeUnit timeUnit) {
return redisTemplate.getExpire(key, timeUnit);
}
/**
* 将key设置为永久有效
*
* @param key
*/
public void persistKey(String key) {
redisTemplate.persist(key);
}
}