redis-生成redis自增id

叁歲伎倆 2023-06-19 05:27 2阅读 0赞

## 使用redis的RedisAtomicLong可以生成分布式自增的ID值。   SequenceFactory是封装的一个工具类，利用redisTemplate生成自增ID,实现如下： ##

![20191204180613898.png][]

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2MDQyOTM4_size_16_color_FFFFFF_t_70 1][]

## sequenceUtil工具类 ##

import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.data.redis.support.atomic.RedisAtomicLong;
    import org.springframework.stereotype.Service;
    
    import java.util.Date;
    import java.util.concurrent.TimeUnit;
    
    @Service
    public class SequenceFactory {
        @Autowired
        RedisTemplate<String, String> redisTemplate;
    
        /**
         * @param key
         * @param value
         * @param expireTime
         * @Title: set
         * @Description: set cache.
         */
        public void set(String key, int value, Date expireTime) {
            RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
            counter.set(value);
            counter.expireAt(expireTime);
        }
    
        /**
         * @param key
         * @param value
         * @param timeout
         * @param unit
         * @Title: set
         * @Description: set cache.
         */
        public void set(String key, int value, long timeout, TimeUnit unit) {
            RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
            counter.set(value);
            counter.expire(timeout, unit);
        }
    
        /**
         * @param key
         * @return
         * @Title: generate
         * @Description: Atomically increments by one the current value.
         */
        public long generate(String key) {
            RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
            return counter.incrementAndGet();
        }
    
        /**
         * @param key
         * @return
         * @Title: generate
         * @Description: Atomically increments by one the current value.
         */
        public long generate(String key, Date expireTime) {
            RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
            counter.expireAt(expireTime);
            return counter.incrementAndGet();
        }
    
        /**
         * @param key
         * @param increment
         * @return
         * @Title: generate
         * @Description: Atomically adds the given value to the current value.
         */
        public long generate(String key, int increment) {
            RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
            return counter.addAndGet(increment);
        }
    
        /**
         * @param key
         * @param increment
         * @param expireTime
         * @return
         * @Title: generate
         * @Description: Atomically adds the given value to the current value.
         */
        public long generate(String key, int increment, Date expireTime) {
            RedisAtomicLong counter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
            counter.expireAt(expireTime);
            return counter.addAndGet(increment);
        }
    }

[20191204180613898.png]: https://img-blog.csdnimg.cn/20191204180613898.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2MDQyOTM4_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191204180515989.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2MDQyOTM4,size_16,color_FFFFFF,t_70