StringRedisTemplate操作Redis时抛: Unexpected token (VALUE_STRING)

Question

用spring的StringRedisTemplate操作Redis的list结构. 存入时正常, 取数时报了下面的异常.
异常已经解决, 但是疑惑原理. 不知道有没有遇到过, 并且知道详细原因的?

异常信息

Redis反序列化报:

`Unexpected token (VALUE_STRING), expected START_ARRAY: need JSON Array to contain As.WRAPPER_ARRAY type information for class java.util.Date`

解决

将配置类的 om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); 注释掉.

@Bean
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory factory) {
        StringRedisTemplate template = new StringRedisTemplate(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 注释这行配置, 解决 `Unexpected token (VALUE_STRING), expected START_ARRAY: need JSON Array to contain As.WRAPPER_ARRAY type information for class java.util.Date`
//        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }

代码

存储

...
BoundListOperations ops = redisTemplate.boundListOps("xxx");
// push一个对象, 其中含有 java.util.Date 类型的名为 timestamp 字段
Long len = ops.leftPush(object);
...

取值

...
BoundListOperations ops = redisTemplate.boundListOps("xxx");
// !这里报了前文所述的异常!
List hisList = ops.range(0, 3);
...

查看Redis里的数据: