can NOT store non-string Object when using StringRedisSerializer for HashValueSerializer

Question

I faced the ClassCastException exception when using the StringRedisSerializer to store hash value. if if remove the non-string field 'age', then it can be stored into redis.

    Demo demo = new Demo();
    demo.setName("DemoCache_jsonSerializer");
    // non-string field
    demo.setAge(111);



    // set stringSerializer
    redisTemplate.setHashValueSerializer(new StringRedisSerializer());
    //exception here: java.lang.Integer cannot be cast to java.lang.String
    redisTemplate.opsForHash().putAll("testKey",
            mapper.toHash(demo));

I know if I change to jsonserializer it will work, but my question is how to keep it work with the StringRedisSerializer ,and able to store object that has non-string fields

Answer 1

Using StringRedisSerializer you can only convert String to byte[] and byte[] to String. To keep it working with StringRedisSerializer better convert all the object to String maybe override toString(). But I guess this might be a bad design.

Have a look at the below links : Source Code and Documentation you might find something helpful.