一、问题描述

通过spring-data-redis依赖包的org.springframework.data.redis.core.ValueOperations的increment方法进行增长累加，然后再通过get方法获取累加结果，具体代码如下

String  submitApiCountKey = "submitCountKey";   @b@ValueOperations<String, Long> operator = redisTemplate.opsForValue();   @b@operator.increment(submitApiCountKey, 1L);   @b@long submitApiCount=operator.get(submitApiCountKey);

执行后，直接报“ERROR c.c.n.c.c.b.c.SerializationHanlder   - com.esotericsoftware.kryo.KryoException: Encountered unregistered class ID: 47”错误异常，详细日志如下

2022-02-09 15:54:23.799 {} [pool-3-thread-2] ERROR c.c.n.c.c.b.c.SerializationHanlder   - com.esotericsoftware.kryo.KryoException: Encountered unregistered class ID: 47@b@	at com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:137) ~[kryo-4.0.0.jar:?] 	@b@	at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:693) ~[kryo-4.0.0.jar:?] 	@b@	at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:804) ~[kryo-4.0.0.jar:?]@b@	...@b@	at org.springframework.data.redis.core.AbstractOperations.deserializeValue(AbstractOperations.java:335) ~[spring-data-redis-2.1.12.RELEASE.jar:2.1.12.RELEASE] @b@	at org.springframework.data.redis.core.AbstractOperations$ValueDeserializingRedisCallback.doInRedis(AbstractOperations.java:61) ~[spring-data-redis-2.1.12.RELEASE.jar:2.1.12.RELEASE]@b@        at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:225) ~[spring-data-redis-2.1.12.RELEASE.jar:2.1.12.RELEASE]   @b@	at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:185) ~[spring-data-redis-2.1.12.RELEASE.jar:2.1.12.RELEASE]@b@	at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:96) ~[spring-data-redis-2.1.12.RELEASE.jar:2.1.12.RELEASE] @b@	at org.springframework.data.redis.core.DefaultValueOperations.get(DefaultValueOperations.java:53) ~[spring-data-redis-2.1.12.RELEASE.jar:2.1.12.RELEASE]

二、解决方法

将上面代码调整如下，即可解决问题

String  submitApiCountKey = "submitCountKey";      @b@Boolean oprResult = (Boolean) redisTemplate.execute(new SessionCallback<Boolean>() {                     @b@        @Override                     @b@	public Boolean execute(RedisOperations redisOperations) throws DataAccessException {               @b@	       redisOperations.multi();                          @b@	       ValueOperations<String, Long> operator = redisOperations.opsForValue();                         @b@	       operator.increment(submitApiCountKey, 1L);                         @b@	       operator.get(submitApiCountKey);                          @b@	       List<Object> results = redisOperations.exec();      @b@	       //条件逻辑判断@b@	       return results.get(1)==1;                    @b@	}             @b@@b@});    @b@@b@if(oprResult.booleanValue()){   @b@  //...条件逻辑后执行代码@b@}