RedisTemplate

org.springframework.data.redis.core.RedisTemplate

依赖


   org.springframework.boot
   spring-boot-starter-data-redis
   1.5.6.RELEASE

配置

# 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

  @Configuration
    @ConditionalOnClass(RedisOperations.class)
    @EnableConfigurationProperties(RedisProperties.class)
    public class RedisConfig {
    
        @Bean
        @ConditionalOnMissingBean(name = "redisTemplate")
        public RedisTemplate redisTemplate(
                RedisConnectionFactory redisConnectionFactory) {
            RedisTemplate 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

@Component
public class RedisService {
    @Autowired
    private RedisTemplate 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 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 keys) {
        Set 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);
    }
}

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