我有一个类如下：

@CompileStatic
@JsonSerialize(using = JsonSerializer)
@JsonDeserialize(using = JsonDeserializer)
class SensitiveString {
    private String rawString

    SensitiveString(String raw) {
        rawString = raw
    }

    Object asType(Class clazz) {
        assert clazz == String: "Cannot cast Sensitive String to type other than string. "
        return this.toString()
    }

    @Override
    String toString() {
        return rawString
    }

    boolean equals(SensitiveString other){
        return other.rawString == rawString
    }

    static class JsonSerializer extends StdSerializer<SensitiveString> {

        JsonSerializer() {
            super(SensitiveString.class)
        }

        @Override
        void serialize(SensitiveString value, JsonGenerator gen, SerializerProvider provider) throws IOException {
            if (value == null || value.rawString == null) {
                gen.writeNull()
                return
            }
            gen.writeString(SensitiveDataGuard.INSTANCE.encryptData(value.rawString))
        }
    }

    static class JsonDeserializer extends StdDeserializer<SensitiveString> {

        JsonDeserializer() {
            super(SensitiveString.class)
        }

        @Override
        SensitiveString deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
            String encrypted = p.readValueAs(String)
            if (encrypted == null)
                return null
            return new SensitiveString(SensitiveDataGuard.INSTANCE.decryptData(encrypted))
        }
    }
}

然后我有一个类，里面用到这个SensitiveString

class User{
    String name;
    SensitiveString passed;
    ...
}

然后我用redis做mybatis二级缓存，json解析用的GenericJackson2JsonRedisSerializer

        redisTemplate.setKeySerializer(new StringRedisSerializer())
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer())
        redisTemplate.setHashKeySerializer(new GenericJackson2JsonRedisSerializer())
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer())

当mapper里有listUsers()方法时，mybatis需要把一个List<User>序列化加到二级缓存中去，序列化的时候出错，错误信息是

 [Type id handling not implemented for type mypackage.SensitiveString (by serializer of type mypackage.SensitiveString$JsonSerializer) (through reference chain: java.util.ArrayList[0]->mypackage.User["passwd"])] 

这种如何解决？